d6aa911156
Since we can't know which variable was modified, we therefore have to conservatively assume that any variable might have been modified.
3792 lines
107 KiB
C++
3792 lines
107 KiB
C++
/*
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* Copyright 2015-2019 Arm Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "spirv_cross.hpp"
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#include "GLSL.std.450.h"
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#include "spirv_cfg.hpp"
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#include "spirv_parser.hpp"
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#include <algorithm>
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#include <cstring>
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#include <utility>
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using namespace std;
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using namespace spv;
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using namespace spirv_cross;
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Compiler::Compiler(vector<uint32_t> ir_)
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{
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Parser parser(move(ir_));
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parser.parse();
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set_ir(move(parser.get_parsed_ir()));
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}
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Compiler::Compiler(const uint32_t *ir_, size_t word_count)
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{
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Parser parser(ir_, word_count);
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parser.parse();
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set_ir(move(parser.get_parsed_ir()));
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}
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Compiler::Compiler(const ParsedIR &ir_)
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{
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set_ir(ir_);
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}
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Compiler::Compiler(ParsedIR &&ir_)
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{
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set_ir(move(ir_));
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}
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void Compiler::set_ir(ParsedIR &&ir_)
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{
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ir = move(ir_);
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parse_fixup();
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}
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void Compiler::set_ir(const ParsedIR &ir_)
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{
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ir = ir_;
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parse_fixup();
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}
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string Compiler::compile()
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{
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// Force a classic "C" locale, reverts when function returns
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ClassicLocale classic_locale;
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return "";
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}
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bool Compiler::variable_storage_is_aliased(const SPIRVariable &v)
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{
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auto &type = get<SPIRType>(v.basetype);
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bool ssbo = v.storage == StorageClassStorageBuffer ||
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ir.meta[type.self].decoration.decoration_flags.get(DecorationBufferBlock);
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bool image = type.basetype == SPIRType::Image;
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bool counter = type.basetype == SPIRType::AtomicCounter;
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bool is_restrict;
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if (ssbo)
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is_restrict = ir.get_buffer_block_flags(v).get(DecorationRestrict);
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else
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is_restrict = has_decoration(v.self, DecorationRestrict);
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return !is_restrict && (ssbo || image || counter);
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}
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bool Compiler::block_is_pure(const SPIRBlock &block)
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{
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for (auto &i : block.ops)
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{
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auto ops = stream(i);
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auto op = static_cast<Op>(i.op);
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switch (op)
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{
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case OpFunctionCall:
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{
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uint32_t func = ops[2];
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if (!function_is_pure(get<SPIRFunction>(func)))
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return false;
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break;
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}
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case OpCopyMemory:
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case OpStore:
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{
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auto &type = expression_type(ops[0]);
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if (type.storage != StorageClassFunction)
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return false;
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break;
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}
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case OpImageWrite:
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return false;
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// Atomics are impure.
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case OpAtomicLoad:
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case OpAtomicStore:
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case OpAtomicExchange:
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case OpAtomicCompareExchange:
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case OpAtomicCompareExchangeWeak:
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case OpAtomicIIncrement:
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case OpAtomicIDecrement:
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case OpAtomicIAdd:
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case OpAtomicISub:
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case OpAtomicSMin:
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case OpAtomicUMin:
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case OpAtomicSMax:
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case OpAtomicUMax:
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case OpAtomicAnd:
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case OpAtomicOr:
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case OpAtomicXor:
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return false;
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// Geometry shader builtins modify global state.
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case OpEndPrimitive:
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case OpEmitStreamVertex:
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case OpEndStreamPrimitive:
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case OpEmitVertex:
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return false;
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// Barriers disallow any reordering, so we should treat blocks with barrier as writing.
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case OpControlBarrier:
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case OpMemoryBarrier:
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return false;
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// OpExtInst is potentially impure depending on extension, but GLSL builtins are at least pure.
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default:
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break;
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}
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}
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return true;
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}
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string Compiler::to_name(uint32_t id, bool allow_alias) const
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{
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if (allow_alias && ir.ids.at(id).get_type() == TypeType)
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{
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// If this type is a simple alias, emit the
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// name of the original type instead.
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// We don't want to override the meta alias
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// as that can be overridden by the reflection APIs after parse.
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auto &type = get<SPIRType>(id);
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if (type.type_alias)
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{
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// If the alias master has been specially packed, we will have emitted a clean variant as well,
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// so skip the name aliasing here.
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if (!has_decoration(type.type_alias, DecorationCPacked))
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return to_name(type.type_alias);
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}
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}
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if (ir.meta[id].decoration.alias.empty())
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return join("_", id);
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else
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return ir.meta[id].decoration.alias;
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}
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bool Compiler::function_is_pure(const SPIRFunction &func)
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{
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for (auto block : func.blocks)
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{
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if (!block_is_pure(get<SPIRBlock>(block)))
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{
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//fprintf(stderr, "Function %s is impure!\n", to_name(func.self).c_str());
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return false;
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}
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}
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//fprintf(stderr, "Function %s is pure!\n", to_name(func.self).c_str());
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return true;
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}
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void Compiler::register_global_read_dependencies(const SPIRBlock &block, uint32_t id)
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{
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for (auto &i : block.ops)
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{
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auto ops = stream(i);
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auto op = static_cast<Op>(i.op);
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switch (op)
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{
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case OpFunctionCall:
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{
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uint32_t func = ops[2];
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register_global_read_dependencies(get<SPIRFunction>(func), id);
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break;
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}
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case OpLoad:
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case OpImageRead:
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{
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// If we're in a storage class which does not get invalidated, adding dependencies here is no big deal.
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auto *var = maybe_get_backing_variable(ops[2]);
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if (var && var->storage != StorageClassFunction)
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{
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auto &type = get<SPIRType>(var->basetype);
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// InputTargets are immutable.
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if (type.basetype != SPIRType::Image && type.image.dim != DimSubpassData)
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var->dependees.push_back(id);
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}
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break;
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}
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default:
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break;
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}
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}
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}
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void Compiler::register_global_read_dependencies(const SPIRFunction &func, uint32_t id)
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{
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for (auto block : func.blocks)
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register_global_read_dependencies(get<SPIRBlock>(block), id);
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}
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SPIRVariable *Compiler::maybe_get_backing_variable(uint32_t chain)
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{
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auto *var = maybe_get<SPIRVariable>(chain);
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if (!var)
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{
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auto *cexpr = maybe_get<SPIRExpression>(chain);
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if (cexpr)
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var = maybe_get<SPIRVariable>(cexpr->loaded_from);
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auto *access_chain = maybe_get<SPIRAccessChain>(chain);
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if (access_chain)
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var = maybe_get<SPIRVariable>(access_chain->loaded_from);
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}
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return var;
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}
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void Compiler::register_read(uint32_t expr, uint32_t chain, bool forwarded)
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{
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auto &e = get<SPIRExpression>(expr);
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auto *var = maybe_get_backing_variable(chain);
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if (var)
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{
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e.loaded_from = var->self;
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// If the backing variable is immutable, we do not need to depend on the variable.
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if (forwarded && !is_immutable(var->self))
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var->dependees.push_back(e.self);
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// If we load from a parameter, make sure we create "inout" if we also write to the parameter.
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// The default is "in" however, so we never invalidate our compilation by reading.
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if (var && var->parameter)
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var->parameter->read_count++;
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}
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}
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void Compiler::register_write(uint32_t chain)
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{
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auto *var = maybe_get<SPIRVariable>(chain);
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if (!var)
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{
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// If we're storing through an access chain, invalidate the backing variable instead.
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auto *expr = maybe_get<SPIRExpression>(chain);
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if (expr && expr->loaded_from)
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var = maybe_get<SPIRVariable>(expr->loaded_from);
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auto *access_chain = maybe_get<SPIRAccessChain>(chain);
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if (access_chain && access_chain->loaded_from)
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var = maybe_get<SPIRVariable>(access_chain->loaded_from);
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}
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if (var)
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{
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// If our variable is in a storage class which can alias with other buffers,
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// invalidate all variables which depend on aliased variables. And if this is a
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// variable pointer, then invalidate all variables regardless.
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if (get_variable_data_type(*var).pointer)
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flush_all_active_variables();
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if (variable_storage_is_aliased(*var))
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flush_all_aliased_variables();
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else if (var)
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flush_dependees(*var);
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// We tried to write to a parameter which is not marked with out qualifier, force a recompile.
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if (var->parameter && var->parameter->write_count == 0)
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{
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var->parameter->write_count++;
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force_recompile = true;
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}
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}
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else
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{
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// If we stored through a variable pointer, then we don't know which
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// variable we stored to. So *all* expressions after this point need to
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// be invalidated.
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// FIXME: If we can prove that the variable pointer will point to
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// only certain variables, we can invalidate only those.
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flush_all_active_variables();
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}
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}
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void Compiler::flush_dependees(SPIRVariable &var)
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{
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for (auto expr : var.dependees)
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invalid_expressions.insert(expr);
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var.dependees.clear();
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}
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void Compiler::flush_all_aliased_variables()
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{
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for (auto aliased : aliased_variables)
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flush_dependees(get<SPIRVariable>(aliased));
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}
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void Compiler::flush_all_atomic_capable_variables()
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{
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for (auto global : global_variables)
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flush_dependees(get<SPIRVariable>(global));
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flush_all_aliased_variables();
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}
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void Compiler::flush_control_dependent_expressions(uint32_t block_id)
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{
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auto &block = get<SPIRBlock>(block_id);
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for (auto &expr : block.invalidate_expressions)
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invalid_expressions.insert(expr);
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block.invalidate_expressions.clear();
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}
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void Compiler::flush_all_active_variables()
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{
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// Invalidate all temporaries we read from variables in this block since they were forwarded.
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// Invalidate all temporaries we read from globals.
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for (auto &v : current_function->local_variables)
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flush_dependees(get<SPIRVariable>(v));
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for (auto &arg : current_function->arguments)
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flush_dependees(get<SPIRVariable>(arg.id));
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for (auto global : global_variables)
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flush_dependees(get<SPIRVariable>(global));
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flush_all_aliased_variables();
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}
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uint32_t Compiler::expression_type_id(uint32_t id) const
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{
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switch (ir.ids[id].get_type())
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{
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case TypeVariable:
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return get<SPIRVariable>(id).basetype;
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case TypeExpression:
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return get<SPIRExpression>(id).expression_type;
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case TypeConstant:
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return get<SPIRConstant>(id).constant_type;
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case TypeConstantOp:
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return get<SPIRConstantOp>(id).basetype;
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case TypeUndef:
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return get<SPIRUndef>(id).basetype;
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case TypeCombinedImageSampler:
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return get<SPIRCombinedImageSampler>(id).combined_type;
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case TypeAccessChain:
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return get<SPIRAccessChain>(id).basetype;
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default:
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SPIRV_CROSS_THROW("Cannot resolve expression type.");
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}
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}
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const SPIRType &Compiler::expression_type(uint32_t id) const
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{
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return get<SPIRType>(expression_type_id(id));
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}
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bool Compiler::expression_is_lvalue(uint32_t id) const
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{
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auto &type = expression_type(id);
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switch (type.basetype)
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{
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case SPIRType::SampledImage:
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case SPIRType::Image:
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case SPIRType::Sampler:
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return false;
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default:
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return true;
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}
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}
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bool Compiler::is_immutable(uint32_t id) const
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{
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if (ir.ids[id].get_type() == TypeVariable)
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{
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auto &var = get<SPIRVariable>(id);
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// Anything we load from the UniformConstant address space is guaranteed to be immutable.
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bool pointer_to_const = var.storage == StorageClassUniformConstant;
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return pointer_to_const || var.phi_variable || !expression_is_lvalue(id);
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}
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else if (ir.ids[id].get_type() == TypeAccessChain)
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return get<SPIRAccessChain>(id).immutable;
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else if (ir.ids[id].get_type() == TypeExpression)
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return get<SPIRExpression>(id).immutable;
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else if (ir.ids[id].get_type() == TypeConstant || ir.ids[id].get_type() == TypeConstantOp ||
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ir.ids[id].get_type() == TypeUndef)
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return true;
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else
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return false;
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}
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static inline bool storage_class_is_interface(spv::StorageClass storage)
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{
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switch (storage)
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{
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case StorageClassInput:
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case StorageClassOutput:
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case StorageClassUniform:
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case StorageClassUniformConstant:
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case StorageClassAtomicCounter:
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case StorageClassPushConstant:
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case StorageClassStorageBuffer:
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return true;
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default:
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return false;
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}
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}
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bool Compiler::is_hidden_variable(const SPIRVariable &var, bool include_builtins) const
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{
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if ((is_builtin_variable(var) && !include_builtins) || var.remapped_variable)
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return true;
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// Combined image samplers are always considered active as they are "magic" variables.
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if (find_if(begin(combined_image_samplers), end(combined_image_samplers), [&var](const CombinedImageSampler &samp) {
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return samp.combined_id == var.self;
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}) != end(combined_image_samplers))
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{
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return false;
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}
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bool hidden = false;
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if (check_active_interface_variables && storage_class_is_interface(var.storage))
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hidden = active_interface_variables.find(var.self) == end(active_interface_variables);
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return hidden;
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}
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bool Compiler::is_builtin_type(const SPIRType &type) const
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{
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// We can have builtin structs as well. If one member of a struct is builtin, the struct must also be builtin.
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for (auto &m : ir.meta[type.self].members)
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if (m.builtin)
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return true;
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return false;
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}
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bool Compiler::is_builtin_variable(const SPIRVariable &var) const
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{
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if (var.compat_builtin || ir.meta[var.self].decoration.builtin)
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return true;
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else
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return is_builtin_type(get<SPIRType>(var.basetype));
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}
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bool Compiler::is_member_builtin(const SPIRType &type, uint32_t index, BuiltIn *builtin) const
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{
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auto &memb = ir.meta[type.self].members;
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if (index < memb.size() && memb[index].builtin)
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{
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if (builtin)
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*builtin = memb[index].builtin_type;
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return true;
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}
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return false;
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}
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bool Compiler::is_scalar(const SPIRType &type) const
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{
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return type.vecsize == 1 && type.columns == 1;
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}
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bool Compiler::is_vector(const SPIRType &type) const
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{
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return type.vecsize > 1 && type.columns == 1;
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}
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bool Compiler::is_matrix(const SPIRType &type) const
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{
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return type.vecsize > 1 && type.columns > 1;
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}
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bool Compiler::is_array(const SPIRType &type) const
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{
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return !type.array.empty();
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}
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ShaderResources Compiler::get_shader_resources() const
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{
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return get_shader_resources(nullptr);
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}
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ShaderResources Compiler::get_shader_resources(const unordered_set<uint32_t> &active_variables) const
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{
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return get_shader_resources(&active_variables);
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}
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bool Compiler::InterfaceVariableAccessHandler::handle(Op opcode, const uint32_t *args, uint32_t length)
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{
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uint32_t variable = 0;
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switch (opcode)
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{
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// Need this first, otherwise, GCC complains about unhandled switch statements.
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default:
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break;
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case OpFunctionCall:
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{
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// Invalid SPIR-V.
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if (length < 3)
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return false;
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uint32_t count = length - 3;
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args += 3;
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for (uint32_t i = 0; i < count; i++)
|
|
{
|
|
auto *var = compiler.maybe_get<SPIRVariable>(args[i]);
|
|
if (var && storage_class_is_interface(var->storage))
|
|
variables.insert(args[i]);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case OpSelect:
|
|
{
|
|
// Invalid SPIR-V.
|
|
if (length < 5)
|
|
return false;
|
|
|
|
uint32_t count = length - 3;
|
|
args += 3;
|
|
for (uint32_t i = 0; i < count; i++)
|
|
{
|
|
auto *var = compiler.maybe_get<SPIRVariable>(args[i]);
|
|
if (var && storage_class_is_interface(var->storage))
|
|
variables.insert(args[i]);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case OpPhi:
|
|
{
|
|
// Invalid SPIR-V.
|
|
if (length < 2)
|
|
return false;
|
|
|
|
uint32_t count = length - 2;
|
|
args += 2;
|
|
for (uint32_t i = 0; i < count; i += 2)
|
|
{
|
|
auto *var = compiler.maybe_get<SPIRVariable>(args[i]);
|
|
if (var && storage_class_is_interface(var->storage))
|
|
variables.insert(args[i]);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case OpAtomicStore:
|
|
case OpStore:
|
|
// Invalid SPIR-V.
|
|
if (length < 1)
|
|
return false;
|
|
variable = args[0];
|
|
break;
|
|
|
|
case OpCopyMemory:
|
|
{
|
|
if (length < 2)
|
|
return false;
|
|
|
|
auto *var = compiler.maybe_get<SPIRVariable>(args[0]);
|
|
if (var && storage_class_is_interface(var->storage))
|
|
variables.insert(variable);
|
|
|
|
var = compiler.maybe_get<SPIRVariable>(args[1]);
|
|
if (var && storage_class_is_interface(var->storage))
|
|
variables.insert(variable);
|
|
break;
|
|
}
|
|
|
|
case OpExtInst:
|
|
{
|
|
if (length < 5)
|
|
return false;
|
|
uint32_t extension_set = args[2];
|
|
if (compiler.get<SPIRExtension>(extension_set).ext == SPIRExtension::SPV_AMD_shader_explicit_vertex_parameter)
|
|
{
|
|
enum AMDShaderExplicitVertexParameter
|
|
{
|
|
InterpolateAtVertexAMD = 1
|
|
};
|
|
|
|
auto op = static_cast<AMDShaderExplicitVertexParameter>(args[3]);
|
|
|
|
switch (op)
|
|
{
|
|
case InterpolateAtVertexAMD:
|
|
{
|
|
auto *var = compiler.maybe_get<SPIRVariable>(args[4]);
|
|
if (var && storage_class_is_interface(var->storage))
|
|
variables.insert(args[4]);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case OpAccessChain:
|
|
case OpInBoundsAccessChain:
|
|
case OpPtrAccessChain:
|
|
case OpLoad:
|
|
case OpCopyObject:
|
|
case OpImageTexelPointer:
|
|
case OpAtomicLoad:
|
|
case OpAtomicExchange:
|
|
case OpAtomicCompareExchange:
|
|
case OpAtomicCompareExchangeWeak:
|
|
case OpAtomicIIncrement:
|
|
case OpAtomicIDecrement:
|
|
case OpAtomicIAdd:
|
|
case OpAtomicISub:
|
|
case OpAtomicSMin:
|
|
case OpAtomicUMin:
|
|
case OpAtomicSMax:
|
|
case OpAtomicUMax:
|
|
case OpAtomicAnd:
|
|
case OpAtomicOr:
|
|
case OpAtomicXor:
|
|
// Invalid SPIR-V.
|
|
if (length < 3)
|
|
return false;
|
|
variable = args[2];
|
|
break;
|
|
}
|
|
|
|
if (variable)
|
|
{
|
|
auto *var = compiler.maybe_get<SPIRVariable>(variable);
|
|
if (var && storage_class_is_interface(var->storage))
|
|
variables.insert(variable);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
unordered_set<uint32_t> Compiler::get_active_interface_variables() const
|
|
{
|
|
// Traverse the call graph and find all interface variables which are in use.
|
|
unordered_set<uint32_t> variables;
|
|
InterfaceVariableAccessHandler handler(*this, variables);
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), handler);
|
|
|
|
// If we needed to create one, we'll need it.
|
|
if (dummy_sampler_id)
|
|
variables.insert(dummy_sampler_id);
|
|
|
|
return variables;
|
|
}
|
|
|
|
void Compiler::set_enabled_interface_variables(std::unordered_set<uint32_t> active_variables)
|
|
{
|
|
active_interface_variables = move(active_variables);
|
|
check_active_interface_variables = true;
|
|
}
|
|
|
|
ShaderResources Compiler::get_shader_resources(const unordered_set<uint32_t> *active_variables) const
|
|
{
|
|
ShaderResources res;
|
|
|
|
for (auto &id : ir.ids)
|
|
{
|
|
if (id.get_type() != TypeVariable)
|
|
continue;
|
|
|
|
auto &var = id.get<SPIRVariable>();
|
|
auto &type = get<SPIRType>(var.basetype);
|
|
|
|
// It is possible for uniform storage classes to be passed as function parameters, so detect
|
|
// that. To detect function parameters, check of StorageClass of variable is function scope.
|
|
if (var.storage == StorageClassFunction || !type.pointer || is_builtin_variable(var))
|
|
continue;
|
|
|
|
if (active_variables && active_variables->find(var.self) == end(*active_variables))
|
|
continue;
|
|
|
|
// Input
|
|
if (var.storage == StorageClassInput && interface_variable_exists_in_entry_point(var.self))
|
|
{
|
|
if (ir.meta[type.self].decoration.decoration_flags.get(DecorationBlock))
|
|
res.stage_inputs.push_back(
|
|
{ var.self, var.basetype, type.self, get_remapped_declared_block_name(var.self) });
|
|
else
|
|
res.stage_inputs.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// Subpass inputs
|
|
else if (var.storage == StorageClassUniformConstant && type.image.dim == DimSubpassData)
|
|
{
|
|
res.subpass_inputs.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// Outputs
|
|
else if (var.storage == StorageClassOutput && interface_variable_exists_in_entry_point(var.self))
|
|
{
|
|
if (ir.meta[type.self].decoration.decoration_flags.get(DecorationBlock))
|
|
res.stage_outputs.push_back(
|
|
{ var.self, var.basetype, type.self, get_remapped_declared_block_name(var.self) });
|
|
else
|
|
res.stage_outputs.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// UBOs
|
|
else if (type.storage == StorageClassUniform &&
|
|
(ir.meta[type.self].decoration.decoration_flags.get(DecorationBlock)))
|
|
{
|
|
res.uniform_buffers.push_back(
|
|
{ var.self, var.basetype, type.self, get_remapped_declared_block_name(var.self) });
|
|
}
|
|
// Old way to declare SSBOs.
|
|
else if (type.storage == StorageClassUniform &&
|
|
(ir.meta[type.self].decoration.decoration_flags.get(DecorationBufferBlock)))
|
|
{
|
|
res.storage_buffers.push_back(
|
|
{ var.self, var.basetype, type.self, get_remapped_declared_block_name(var.self) });
|
|
}
|
|
// Modern way to declare SSBOs.
|
|
else if (type.storage == StorageClassStorageBuffer)
|
|
{
|
|
res.storage_buffers.push_back(
|
|
{ var.self, var.basetype, type.self, get_remapped_declared_block_name(var.self) });
|
|
}
|
|
// Push constant blocks
|
|
else if (type.storage == StorageClassPushConstant)
|
|
{
|
|
// There can only be one push constant block, but keep the vector in case this restriction is lifted
|
|
// in the future.
|
|
res.push_constant_buffers.push_back(
|
|
{ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// Images
|
|
else if (type.storage == StorageClassUniformConstant && type.basetype == SPIRType::Image &&
|
|
type.image.sampled == 2)
|
|
{
|
|
res.storage_images.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// Separate images
|
|
else if (type.storage == StorageClassUniformConstant && type.basetype == SPIRType::Image &&
|
|
type.image.sampled == 1)
|
|
{
|
|
res.separate_images.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// Separate samplers
|
|
else if (type.storage == StorageClassUniformConstant && type.basetype == SPIRType::Sampler)
|
|
{
|
|
res.separate_samplers.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// Textures
|
|
else if (type.storage == StorageClassUniformConstant && type.basetype == SPIRType::SampledImage)
|
|
{
|
|
res.sampled_images.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
// Atomic counters
|
|
else if (type.storage == StorageClassAtomicCounter)
|
|
{
|
|
res.atomic_counters.push_back({ var.self, var.basetype, type.self, ir.meta[var.self].decoration.alias });
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
bool Compiler::type_is_block_like(const SPIRType &type) const
|
|
{
|
|
if (type.basetype != SPIRType::Struct)
|
|
return false;
|
|
|
|
if (has_decoration(type.self, DecorationBlock) || has_decoration(type.self, DecorationBufferBlock))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Block-like types may have Offset decorations.
|
|
for (uint32_t i = 0; i < uint32_t(type.member_types.size()); i++)
|
|
if (has_member_decoration(type.self, i, DecorationOffset))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
void Compiler::fixup_type_alias()
|
|
{
|
|
// Due to how some backends work, the "master" type of type_alias must be a block-like type if it exists.
|
|
// FIXME: Multiple alias types which are both block-like will be awkward, for now, it's best to just drop the type
|
|
// alias if the slave type is a block type.
|
|
for (auto &id : ir.ids)
|
|
{
|
|
if (id.get_type() != TypeType)
|
|
continue;
|
|
|
|
auto &type = id.get<SPIRType>();
|
|
|
|
if (type.type_alias && type_is_block_like(type))
|
|
{
|
|
// Become the master.
|
|
for (auto &other_id : ir.ids)
|
|
{
|
|
if (other_id.get_type() != TypeType)
|
|
continue;
|
|
if (other_id.get_id() == type.self)
|
|
continue;
|
|
|
|
auto &other_type = other_id.get<SPIRType>();
|
|
if (other_type.type_alias == type.type_alias)
|
|
other_type.type_alias = type.self;
|
|
}
|
|
|
|
get<SPIRType>(type.type_alias).type_alias = id.get_id();
|
|
type.type_alias = 0;
|
|
}
|
|
}
|
|
|
|
for (auto &id : ir.ids)
|
|
{
|
|
if (id.get_type() != TypeType)
|
|
continue;
|
|
|
|
auto &type = id.get<SPIRType>();
|
|
if (type.type_alias && type_is_block_like(type))
|
|
{
|
|
// This is not allowed, drop the type_alias.
|
|
type.type_alias = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Compiler::parse_fixup()
|
|
{
|
|
// Figure out specialization constants for work group sizes.
|
|
for (auto &id : ir.ids)
|
|
{
|
|
if (id.get_type() == TypeConstant)
|
|
{
|
|
auto &c = id.get<SPIRConstant>();
|
|
if (ir.meta[c.self].decoration.builtin && ir.meta[c.self].decoration.builtin_type == BuiltInWorkgroupSize)
|
|
{
|
|
// In current SPIR-V, there can be just one constant like this.
|
|
// All entry points will receive the constant value.
|
|
for (auto &entry : ir.entry_points)
|
|
{
|
|
entry.second.workgroup_size.constant = c.self;
|
|
entry.second.workgroup_size.x = c.scalar(0, 0);
|
|
entry.second.workgroup_size.y = c.scalar(0, 1);
|
|
entry.second.workgroup_size.z = c.scalar(0, 2);
|
|
}
|
|
}
|
|
}
|
|
else if (id.get_type() == TypeVariable)
|
|
{
|
|
auto &var = id.get<SPIRVariable>();
|
|
if (var.storage == StorageClassPrivate || var.storage == StorageClassWorkgroup ||
|
|
var.storage == StorageClassOutput)
|
|
global_variables.push_back(var.self);
|
|
if (variable_storage_is_aliased(var))
|
|
aliased_variables.push_back(var.self);
|
|
}
|
|
}
|
|
|
|
fixup_type_alias();
|
|
}
|
|
|
|
void Compiler::flatten_interface_block(uint32_t id)
|
|
{
|
|
auto &var = get<SPIRVariable>(id);
|
|
auto &type = get<SPIRType>(var.basetype);
|
|
auto &flags = ir.meta.at(type.self).decoration.decoration_flags;
|
|
|
|
if (!type.array.empty())
|
|
SPIRV_CROSS_THROW("Type is array of UBOs.");
|
|
if (type.basetype != SPIRType::Struct)
|
|
SPIRV_CROSS_THROW("Type is not a struct.");
|
|
if (!flags.get(DecorationBlock))
|
|
SPIRV_CROSS_THROW("Type is not a block.");
|
|
if (type.member_types.empty())
|
|
SPIRV_CROSS_THROW("Member list of struct is empty.");
|
|
|
|
uint32_t t = type.member_types[0];
|
|
for (auto &m : type.member_types)
|
|
if (t != m)
|
|
SPIRV_CROSS_THROW("Types in block differ.");
|
|
|
|
auto &mtype = get<SPIRType>(t);
|
|
if (!mtype.array.empty())
|
|
SPIRV_CROSS_THROW("Member type cannot be arrays.");
|
|
if (mtype.basetype == SPIRType::Struct)
|
|
SPIRV_CROSS_THROW("Member type cannot be struct.");
|
|
|
|
// Inherit variable name from interface block name.
|
|
ir.meta.at(var.self).decoration.alias = ir.meta.at(type.self).decoration.alias;
|
|
|
|
auto storage = var.storage;
|
|
if (storage == StorageClassUniform)
|
|
storage = StorageClassUniformConstant;
|
|
|
|
// Change type definition in-place into an array instead.
|
|
// Access chains will still work as-is.
|
|
uint32_t array_size = uint32_t(type.member_types.size());
|
|
type = mtype;
|
|
type.array.push_back(array_size);
|
|
type.pointer = true;
|
|
type.storage = storage;
|
|
type.parent_type = t;
|
|
var.storage = storage;
|
|
}
|
|
|
|
void Compiler::update_name_cache(unordered_set<string> &cache_primary, const unordered_set<string> &cache_secondary,
|
|
string &name)
|
|
{
|
|
if (name.empty())
|
|
return;
|
|
|
|
const auto find_name = [&](const string &n) -> bool {
|
|
if (cache_primary.find(n) != end(cache_primary))
|
|
return true;
|
|
|
|
if (&cache_primary != &cache_secondary)
|
|
if (cache_secondary.find(n) != end(cache_secondary))
|
|
return true;
|
|
|
|
return false;
|
|
};
|
|
|
|
const auto insert_name = [&](const string &n) { cache_primary.insert(n); };
|
|
|
|
if (!find_name(name))
|
|
{
|
|
insert_name(name);
|
|
return;
|
|
}
|
|
|
|
uint32_t counter = 0;
|
|
auto tmpname = name;
|
|
|
|
bool use_linked_underscore = true;
|
|
|
|
if (tmpname == "_")
|
|
{
|
|
// We cannot just append numbers, as we will end up creating internally reserved names.
|
|
// Make it like _0_<counter> instead.
|
|
tmpname += "0";
|
|
}
|
|
else if (tmpname.back() == '_')
|
|
{
|
|
// The last_character is an underscore, so we don't need to link in underscore.
|
|
// This would violate double underscore rules.
|
|
use_linked_underscore = false;
|
|
}
|
|
|
|
// If there is a collision (very rare),
|
|
// keep tacking on extra identifier until it's unique.
|
|
do
|
|
{
|
|
counter++;
|
|
name = tmpname + (use_linked_underscore ? "_" : "") + convert_to_string(counter);
|
|
} while (find_name(name));
|
|
insert_name(name);
|
|
}
|
|
|
|
void Compiler::update_name_cache(unordered_set<string> &cache, string &name)
|
|
{
|
|
update_name_cache(cache, cache, name);
|
|
}
|
|
|
|
void Compiler::set_name(uint32_t id, const std::string &name)
|
|
{
|
|
ir.set_name(id, name);
|
|
}
|
|
|
|
const SPIRType &Compiler::get_type(uint32_t id) const
|
|
{
|
|
return get<SPIRType>(id);
|
|
}
|
|
|
|
const SPIRType &Compiler::get_type_from_variable(uint32_t id) const
|
|
{
|
|
return get<SPIRType>(get<SPIRVariable>(id).basetype);
|
|
}
|
|
|
|
uint32_t Compiler::get_pointee_type_id(uint32_t type_id) const
|
|
{
|
|
auto *p_type = &get<SPIRType>(type_id);
|
|
if (p_type->pointer)
|
|
{
|
|
assert(p_type->parent_type);
|
|
type_id = p_type->parent_type;
|
|
}
|
|
return type_id;
|
|
}
|
|
|
|
const SPIRType &Compiler::get_pointee_type(const SPIRType &type) const
|
|
{
|
|
auto *p_type = &type;
|
|
if (p_type->pointer)
|
|
{
|
|
assert(p_type->parent_type);
|
|
p_type = &get<SPIRType>(p_type->parent_type);
|
|
}
|
|
return *p_type;
|
|
}
|
|
|
|
const SPIRType &Compiler::get_pointee_type(uint32_t type_id) const
|
|
{
|
|
return get_pointee_type(get<SPIRType>(type_id));
|
|
}
|
|
|
|
uint32_t Compiler::get_variable_data_type_id(const SPIRVariable &var) const
|
|
{
|
|
if (var.phi_variable)
|
|
return var.basetype;
|
|
return get_pointee_type_id(var.basetype);
|
|
}
|
|
|
|
SPIRType &Compiler::get_variable_data_type(const SPIRVariable &var)
|
|
{
|
|
return get<SPIRType>(get_variable_data_type_id(var));
|
|
}
|
|
|
|
const SPIRType &Compiler::get_variable_data_type(const SPIRVariable &var) const
|
|
{
|
|
return get<SPIRType>(get_variable_data_type_id(var));
|
|
}
|
|
|
|
bool Compiler::is_sampled_image_type(const SPIRType &type)
|
|
{
|
|
return (type.basetype == SPIRType::Image || type.basetype == SPIRType::SampledImage) && type.image.sampled == 1 &&
|
|
type.image.dim != DimBuffer;
|
|
}
|
|
|
|
void Compiler::set_member_decoration_string(uint32_t id, uint32_t index, spv::Decoration decoration,
|
|
const std::string &argument)
|
|
{
|
|
ir.set_member_decoration_string(id, index, decoration, argument);
|
|
}
|
|
|
|
void Compiler::set_member_decoration(uint32_t id, uint32_t index, Decoration decoration, uint32_t argument)
|
|
{
|
|
ir.set_member_decoration(id, index, decoration, argument);
|
|
}
|
|
|
|
void Compiler::set_member_name(uint32_t id, uint32_t index, const std::string &name)
|
|
{
|
|
ir.set_member_name(id, index, name);
|
|
}
|
|
|
|
const std::string &Compiler::get_member_name(uint32_t id, uint32_t index) const
|
|
{
|
|
return ir.get_member_name(id, index);
|
|
}
|
|
|
|
void Compiler::set_member_qualified_name(uint32_t type_id, uint32_t index, const std::string &name)
|
|
{
|
|
ir.meta.at(type_id).members.resize(max(ir.meta[type_id].members.size(), size_t(index) + 1));
|
|
ir.meta.at(type_id).members[index].qualified_alias = name;
|
|
}
|
|
|
|
const std::string &Compiler::get_member_qualified_name(uint32_t type_id, uint32_t index) const
|
|
{
|
|
const static string empty;
|
|
|
|
auto &m = ir.meta.at(type_id);
|
|
if (index < m.members.size())
|
|
return m.members[index].qualified_alias;
|
|
else
|
|
return empty;
|
|
}
|
|
|
|
uint32_t Compiler::get_member_decoration(uint32_t id, uint32_t index, Decoration decoration) const
|
|
{
|
|
return ir.get_member_decoration(id, index, decoration);
|
|
}
|
|
|
|
uint64_t Compiler::get_member_decoration_mask(uint32_t id, uint32_t index) const
|
|
{
|
|
return get_member_decoration_bitset(id, index).get_lower();
|
|
}
|
|
|
|
const Bitset &Compiler::get_member_decoration_bitset(uint32_t id, uint32_t index) const
|
|
{
|
|
return ir.get_member_decoration_bitset(id, index);
|
|
}
|
|
|
|
bool Compiler::has_member_decoration(uint32_t id, uint32_t index, Decoration decoration) const
|
|
{
|
|
return ir.has_member_decoration(id, index, decoration);
|
|
}
|
|
|
|
void Compiler::unset_member_decoration(uint32_t id, uint32_t index, Decoration decoration)
|
|
{
|
|
ir.unset_member_decoration(id, index, decoration);
|
|
}
|
|
|
|
void Compiler::set_decoration_string(uint32_t id, spv::Decoration decoration, const std::string &argument)
|
|
{
|
|
ir.set_decoration_string(id, decoration, argument);
|
|
}
|
|
|
|
void Compiler::set_decoration(uint32_t id, Decoration decoration, uint32_t argument)
|
|
{
|
|
ir.set_decoration(id, decoration, argument);
|
|
}
|
|
|
|
StorageClass Compiler::get_storage_class(uint32_t id) const
|
|
{
|
|
return get<SPIRVariable>(id).storage;
|
|
}
|
|
|
|
const std::string &Compiler::get_name(uint32_t id) const
|
|
{
|
|
return ir.meta.at(id).decoration.alias;
|
|
}
|
|
|
|
const std::string Compiler::get_fallback_name(uint32_t id) const
|
|
{
|
|
return join("_", id);
|
|
}
|
|
|
|
const std::string Compiler::get_block_fallback_name(uint32_t id) const
|
|
{
|
|
auto &var = get<SPIRVariable>(id);
|
|
if (get_name(id).empty())
|
|
return join("_", get<SPIRType>(var.basetype).self, "_", id);
|
|
else
|
|
return get_name(id);
|
|
}
|
|
|
|
uint64_t Compiler::get_decoration_mask(uint32_t id) const
|
|
{
|
|
return get_decoration_bitset(id).get_lower();
|
|
}
|
|
|
|
const Bitset &Compiler::get_decoration_bitset(uint32_t id) const
|
|
{
|
|
return ir.get_decoration_bitset(id);
|
|
}
|
|
|
|
bool Compiler::has_decoration(uint32_t id, Decoration decoration) const
|
|
{
|
|
return ir.has_decoration(id, decoration);
|
|
}
|
|
|
|
const string &Compiler::get_decoration_string(uint32_t id, Decoration decoration) const
|
|
{
|
|
return ir.get_decoration_string(id, decoration);
|
|
}
|
|
|
|
const string &Compiler::get_member_decoration_string(uint32_t id, uint32_t index, Decoration decoration) const
|
|
{
|
|
return ir.get_member_decoration_string(id, index, decoration);
|
|
}
|
|
|
|
uint32_t Compiler::get_decoration(uint32_t id, Decoration decoration) const
|
|
{
|
|
return ir.get_decoration(id, decoration);
|
|
}
|
|
|
|
void Compiler::unset_decoration(uint32_t id, Decoration decoration)
|
|
{
|
|
ir.unset_decoration(id, decoration);
|
|
}
|
|
|
|
bool Compiler::get_binary_offset_for_decoration(uint32_t id, spv::Decoration decoration, uint32_t &word_offset) const
|
|
{
|
|
auto &word_offsets = ir.meta.at(id).decoration_word_offset;
|
|
auto itr = word_offsets.find(decoration);
|
|
if (itr == end(word_offsets))
|
|
return false;
|
|
|
|
word_offset = itr->second;
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::block_is_loop_candidate(const SPIRBlock &block, SPIRBlock::Method method) const
|
|
{
|
|
// Tried and failed.
|
|
if (block.disable_block_optimization || block.complex_continue)
|
|
return false;
|
|
|
|
if (method == SPIRBlock::MergeToSelectForLoop || method == SPIRBlock::MergeToSelectContinueForLoop)
|
|
{
|
|
// Try to detect common for loop pattern
|
|
// which the code backend can use to create cleaner code.
|
|
// for(;;) { if (cond) { some_body; } else { break; } }
|
|
// is the pattern we're looking for.
|
|
bool ret = block.terminator == SPIRBlock::Select && block.merge == SPIRBlock::MergeLoop &&
|
|
block.true_block != block.merge_block && block.true_block != block.self &&
|
|
block.false_block == block.merge_block;
|
|
|
|
if (ret && method == SPIRBlock::MergeToSelectContinueForLoop)
|
|
ret = block.true_block == block.continue_block;
|
|
|
|
// If we have OpPhi which depends on branches which came from our own block,
|
|
// we need to flush phi variables in else block instead of a trivial break,
|
|
// so we cannot assume this is a for loop candidate.
|
|
if (ret)
|
|
{
|
|
for (auto &phi : block.phi_variables)
|
|
if (phi.parent == block.self)
|
|
return false;
|
|
|
|
auto *merge = maybe_get<SPIRBlock>(block.merge_block);
|
|
if (merge)
|
|
for (auto &phi : merge->phi_variables)
|
|
if (phi.parent == block.self)
|
|
return false;
|
|
}
|
|
return ret;
|
|
}
|
|
else if (method == SPIRBlock::MergeToDirectForLoop)
|
|
{
|
|
// Empty loop header that just sets up merge target
|
|
// and branches to loop body.
|
|
bool ret = block.terminator == SPIRBlock::Direct && block.merge == SPIRBlock::MergeLoop && block.ops.empty();
|
|
|
|
if (!ret)
|
|
return false;
|
|
|
|
auto &child = get<SPIRBlock>(block.next_block);
|
|
ret = child.terminator == SPIRBlock::Select && child.merge == SPIRBlock::MergeNone &&
|
|
child.false_block == block.merge_block && child.true_block != block.merge_block &&
|
|
child.true_block != block.self;
|
|
|
|
// If we have OpPhi which depends on branches which came from our own block,
|
|
// we need to flush phi variables in else block instead of a trivial break,
|
|
// so we cannot assume this is a for loop candidate.
|
|
if (ret)
|
|
{
|
|
for (auto &phi : block.phi_variables)
|
|
if (phi.parent == block.self || phi.parent == child.self)
|
|
return false;
|
|
|
|
for (auto &phi : child.phi_variables)
|
|
if (phi.parent == block.self)
|
|
return false;
|
|
|
|
auto *merge = maybe_get<SPIRBlock>(block.merge_block);
|
|
if (merge)
|
|
for (auto &phi : merge->phi_variables)
|
|
if (phi.parent == block.self || phi.parent == child.false_block)
|
|
return false;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
bool Compiler::block_is_outside_flow_control_from_block(const SPIRBlock &from, const SPIRBlock &to)
|
|
{
|
|
auto *start = &from;
|
|
|
|
if (start->self == to.self)
|
|
return true;
|
|
|
|
// Break cycles.
|
|
if (is_continue(start->self))
|
|
return false;
|
|
|
|
// If our select block doesn't merge, we must break or continue in these blocks,
|
|
// so if continues occur branchless within these blocks, consider them branchless as well.
|
|
// This is typically used for loop control.
|
|
if (start->terminator == SPIRBlock::Select && start->merge == SPIRBlock::MergeNone &&
|
|
(block_is_outside_flow_control_from_block(get<SPIRBlock>(start->true_block), to) ||
|
|
block_is_outside_flow_control_from_block(get<SPIRBlock>(start->false_block), to)))
|
|
{
|
|
return true;
|
|
}
|
|
else if (start->merge_block && block_is_outside_flow_control_from_block(get<SPIRBlock>(start->merge_block), to))
|
|
{
|
|
return true;
|
|
}
|
|
else if (start->next_block && block_is_outside_flow_control_from_block(get<SPIRBlock>(start->next_block), to))
|
|
{
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
bool Compiler::execution_is_noop(const SPIRBlock &from, const SPIRBlock &to) const
|
|
{
|
|
if (!execution_is_branchless(from, to))
|
|
return false;
|
|
|
|
auto *start = &from;
|
|
for (;;)
|
|
{
|
|
if (start->self == to.self)
|
|
return true;
|
|
|
|
if (!start->ops.empty())
|
|
return false;
|
|
|
|
auto &next = get<SPIRBlock>(start->next_block);
|
|
// Flushing phi variables does not count as noop.
|
|
for (auto &phi : next.phi_variables)
|
|
if (phi.parent == start->self)
|
|
return false;
|
|
|
|
start = &next;
|
|
}
|
|
}
|
|
|
|
bool Compiler::execution_is_branchless(const SPIRBlock &from, const SPIRBlock &to) const
|
|
{
|
|
auto *start = &from;
|
|
for (;;)
|
|
{
|
|
if (start->self == to.self)
|
|
return true;
|
|
|
|
if (start->terminator == SPIRBlock::Direct && start->merge == SPIRBlock::MergeNone)
|
|
start = &get<SPIRBlock>(start->next_block);
|
|
else
|
|
return false;
|
|
}
|
|
}
|
|
|
|
SPIRBlock::ContinueBlockType Compiler::continue_block_type(const SPIRBlock &block) const
|
|
{
|
|
// The block was deemed too complex during code emit, pick conservative fallback paths.
|
|
if (block.complex_continue)
|
|
return SPIRBlock::ComplexLoop;
|
|
|
|
// In older glslang output continue block can be equal to the loop header.
|
|
// In this case, execution is clearly branchless, so just assume a while loop header here.
|
|
if (block.merge == SPIRBlock::MergeLoop)
|
|
return SPIRBlock::WhileLoop;
|
|
|
|
auto &dominator = get<SPIRBlock>(block.loop_dominator);
|
|
|
|
if (execution_is_noop(block, dominator))
|
|
return SPIRBlock::WhileLoop;
|
|
else if (execution_is_branchless(block, dominator))
|
|
return SPIRBlock::ForLoop;
|
|
else
|
|
{
|
|
if (block.merge == SPIRBlock::MergeNone && block.terminator == SPIRBlock::Select &&
|
|
block.true_block == dominator.self && block.false_block == dominator.merge_block)
|
|
{
|
|
return SPIRBlock::DoWhileLoop;
|
|
}
|
|
else
|
|
return SPIRBlock::ComplexLoop;
|
|
}
|
|
}
|
|
|
|
bool Compiler::traverse_all_reachable_opcodes(const SPIRBlock &block, OpcodeHandler &handler) const
|
|
{
|
|
handler.set_current_block(block);
|
|
|
|
// Ideally, perhaps traverse the CFG instead of all blocks in order to eliminate dead blocks,
|
|
// but this shouldn't be a problem in practice unless the SPIR-V is doing insane things like recursing
|
|
// inside dead blocks ...
|
|
for (auto &i : block.ops)
|
|
{
|
|
auto ops = stream(i);
|
|
auto op = static_cast<Op>(i.op);
|
|
|
|
if (!handler.handle(op, ops, i.length))
|
|
return false;
|
|
|
|
if (op == OpFunctionCall)
|
|
{
|
|
auto &func = get<SPIRFunction>(ops[2]);
|
|
if (handler.follow_function_call(func))
|
|
{
|
|
if (!handler.begin_function_scope(ops, i.length))
|
|
return false;
|
|
if (!traverse_all_reachable_opcodes(get<SPIRFunction>(ops[2]), handler))
|
|
return false;
|
|
if (!handler.end_function_scope(ops, i.length))
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::traverse_all_reachable_opcodes(const SPIRFunction &func, OpcodeHandler &handler) const
|
|
{
|
|
for (auto block : func.blocks)
|
|
if (!traverse_all_reachable_opcodes(get<SPIRBlock>(block), handler))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
uint32_t Compiler::type_struct_member_offset(const SPIRType &type, uint32_t index) const
|
|
{
|
|
// Decoration must be set in valid SPIR-V, otherwise throw.
|
|
auto &dec = ir.meta[type.self].members.at(index);
|
|
if (dec.decoration_flags.get(DecorationOffset))
|
|
return dec.offset;
|
|
else
|
|
SPIRV_CROSS_THROW("Struct member does not have Offset set.");
|
|
}
|
|
|
|
uint32_t Compiler::type_struct_member_array_stride(const SPIRType &type, uint32_t index) const
|
|
{
|
|
// Decoration must be set in valid SPIR-V, otherwise throw.
|
|
// ArrayStride is part of the array type not OpMemberDecorate.
|
|
auto &dec = ir.meta[type.member_types[index]].decoration;
|
|
if (dec.decoration_flags.get(DecorationArrayStride))
|
|
return dec.array_stride;
|
|
else
|
|
SPIRV_CROSS_THROW("Struct member does not have ArrayStride set.");
|
|
}
|
|
|
|
uint32_t Compiler::type_struct_member_matrix_stride(const SPIRType &type, uint32_t index) const
|
|
{
|
|
// Decoration must be set in valid SPIR-V, otherwise throw.
|
|
// MatrixStride is part of OpMemberDecorate.
|
|
auto &dec = ir.meta[type.self].members[index];
|
|
if (dec.decoration_flags.get(DecorationMatrixStride))
|
|
return dec.matrix_stride;
|
|
else
|
|
SPIRV_CROSS_THROW("Struct member does not have MatrixStride set.");
|
|
}
|
|
|
|
size_t Compiler::get_declared_struct_size(const SPIRType &type) const
|
|
{
|
|
if (type.member_types.empty())
|
|
SPIRV_CROSS_THROW("Declared struct in block cannot be empty.");
|
|
|
|
uint32_t last = uint32_t(type.member_types.size() - 1);
|
|
size_t offset = type_struct_member_offset(type, last);
|
|
size_t size = get_declared_struct_member_size(type, last);
|
|
return offset + size;
|
|
}
|
|
|
|
size_t Compiler::get_declared_struct_size_runtime_array(const SPIRType &type, size_t array_size) const
|
|
{
|
|
if (type.member_types.empty())
|
|
SPIRV_CROSS_THROW("Declared struct in block cannot be empty.");
|
|
|
|
size_t size = get_declared_struct_size(type);
|
|
auto &last_type = get<SPIRType>(type.member_types.back());
|
|
if (!last_type.array.empty() && last_type.array_size_literal[0] && last_type.array[0] == 0) // Runtime array
|
|
size += array_size * type_struct_member_array_stride(type, uint32_t(type.member_types.size() - 1));
|
|
|
|
return size;
|
|
}
|
|
|
|
size_t Compiler::get_declared_struct_member_size(const SPIRType &struct_type, uint32_t index) const
|
|
{
|
|
if (struct_type.member_types.empty())
|
|
SPIRV_CROSS_THROW("Declared struct in block cannot be empty.");
|
|
|
|
auto &flags = get_member_decoration_bitset(struct_type.self, index);
|
|
auto &type = get<SPIRType>(struct_type.member_types[index]);
|
|
|
|
switch (type.basetype)
|
|
{
|
|
case SPIRType::Unknown:
|
|
case SPIRType::Void:
|
|
case SPIRType::Boolean: // Bools are purely logical, and cannot be used for externally visible types.
|
|
case SPIRType::AtomicCounter:
|
|
case SPIRType::Image:
|
|
case SPIRType::SampledImage:
|
|
case SPIRType::Sampler:
|
|
SPIRV_CROSS_THROW("Querying size for object with opaque size.");
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!type.array.empty())
|
|
{
|
|
// For arrays, we can use ArrayStride to get an easy check.
|
|
bool array_size_literal = type.array_size_literal.back();
|
|
uint32_t array_size = array_size_literal ? type.array.back() : get<SPIRConstant>(type.array.back()).scalar();
|
|
return type_struct_member_array_stride(struct_type, index) * array_size;
|
|
}
|
|
else if (type.basetype == SPIRType::Struct)
|
|
{
|
|
return get_declared_struct_size(type);
|
|
}
|
|
else
|
|
{
|
|
unsigned vecsize = type.vecsize;
|
|
unsigned columns = type.columns;
|
|
|
|
// Vectors.
|
|
if (columns == 1)
|
|
{
|
|
size_t component_size = type.width / 8;
|
|
return vecsize * component_size;
|
|
}
|
|
else
|
|
{
|
|
uint32_t matrix_stride = type_struct_member_matrix_stride(struct_type, index);
|
|
|
|
// Per SPIR-V spec, matrices must be tightly packed and aligned up for vec3 accesses.
|
|
if (flags.get(DecorationRowMajor))
|
|
return matrix_stride * vecsize;
|
|
else if (flags.get(DecorationColMajor))
|
|
return matrix_stride * columns;
|
|
else
|
|
SPIRV_CROSS_THROW("Either row-major or column-major must be declared for matrices.");
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Compiler::BufferAccessHandler::handle(Op opcode, const uint32_t *args, uint32_t length)
|
|
{
|
|
if (opcode != OpAccessChain && opcode != OpInBoundsAccessChain && opcode != OpPtrAccessChain)
|
|
return true;
|
|
|
|
bool ptr_chain = (opcode == OpPtrAccessChain);
|
|
|
|
// Invalid SPIR-V.
|
|
if (length < (ptr_chain ? 5 : 4))
|
|
return false;
|
|
|
|
if (args[2] != id)
|
|
return true;
|
|
|
|
// Don't bother traversing the entire access chain tree yet.
|
|
// If we access a struct member, assume we access the entire member.
|
|
uint32_t index = compiler.get<SPIRConstant>(args[ptr_chain ? 4 : 3]).scalar();
|
|
|
|
// Seen this index already.
|
|
if (seen.find(index) != end(seen))
|
|
return true;
|
|
seen.insert(index);
|
|
|
|
auto &type = compiler.expression_type(id);
|
|
uint32_t offset = compiler.type_struct_member_offset(type, index);
|
|
|
|
size_t range;
|
|
// If we have another member in the struct, deduce the range by looking at the next member.
|
|
// This is okay since structs in SPIR-V can have padding, but Offset decoration must be
|
|
// monotonically increasing.
|
|
// Of course, this doesn't take into account if the SPIR-V for some reason decided to add
|
|
// very large amounts of padding, but that's not really a big deal.
|
|
if (index + 1 < type.member_types.size())
|
|
{
|
|
range = compiler.type_struct_member_offset(type, index + 1) - offset;
|
|
}
|
|
else
|
|
{
|
|
// No padding, so just deduce it from the size of the member directly.
|
|
range = compiler.get_declared_struct_member_size(type, index);
|
|
}
|
|
|
|
ranges.push_back({ index, offset, range });
|
|
return true;
|
|
}
|
|
|
|
std::vector<BufferRange> Compiler::get_active_buffer_ranges(uint32_t id) const
|
|
{
|
|
std::vector<BufferRange> ranges;
|
|
BufferAccessHandler handler(*this, ranges, id);
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), handler);
|
|
return ranges;
|
|
}
|
|
|
|
bool Compiler::types_are_logically_equivalent(const SPIRType &a, const SPIRType &b) const
|
|
{
|
|
if (a.basetype != b.basetype)
|
|
return false;
|
|
if (a.width != b.width)
|
|
return false;
|
|
if (a.vecsize != b.vecsize)
|
|
return false;
|
|
if (a.columns != b.columns)
|
|
return false;
|
|
if (a.array.size() != b.array.size())
|
|
return false;
|
|
|
|
size_t array_count = a.array.size();
|
|
if (array_count && memcmp(a.array.data(), b.array.data(), array_count * sizeof(uint32_t)) != 0)
|
|
return false;
|
|
|
|
if (a.basetype == SPIRType::Image || a.basetype == SPIRType::SampledImage)
|
|
{
|
|
if (memcmp(&a.image, &b.image, sizeof(SPIRType::Image)) != 0)
|
|
return false;
|
|
}
|
|
|
|
if (a.member_types.size() != b.member_types.size())
|
|
return false;
|
|
|
|
size_t member_types = a.member_types.size();
|
|
for (size_t i = 0; i < member_types; i++)
|
|
{
|
|
if (!types_are_logically_equivalent(get<SPIRType>(a.member_types[i]), get<SPIRType>(b.member_types[i])))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
uint64_t Compiler::get_execution_mode_mask() const
|
|
{
|
|
return get_entry_point().flags.get_lower();
|
|
}
|
|
|
|
const Bitset &Compiler::get_execution_mode_bitset() const
|
|
{
|
|
return get_entry_point().flags;
|
|
}
|
|
|
|
void Compiler::set_execution_mode(ExecutionMode mode, uint32_t arg0, uint32_t arg1, uint32_t arg2)
|
|
{
|
|
auto &execution = get_entry_point();
|
|
|
|
execution.flags.set(mode);
|
|
switch (mode)
|
|
{
|
|
case ExecutionModeLocalSize:
|
|
execution.workgroup_size.x = arg0;
|
|
execution.workgroup_size.y = arg1;
|
|
execution.workgroup_size.z = arg2;
|
|
break;
|
|
|
|
case ExecutionModeInvocations:
|
|
execution.invocations = arg0;
|
|
break;
|
|
|
|
case ExecutionModeOutputVertices:
|
|
execution.output_vertices = arg0;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Compiler::unset_execution_mode(ExecutionMode mode)
|
|
{
|
|
auto &execution = get_entry_point();
|
|
execution.flags.clear(mode);
|
|
}
|
|
|
|
uint32_t Compiler::get_work_group_size_specialization_constants(SpecializationConstant &x, SpecializationConstant &y,
|
|
SpecializationConstant &z) const
|
|
{
|
|
auto &execution = get_entry_point();
|
|
x = { 0, 0 };
|
|
y = { 0, 0 };
|
|
z = { 0, 0 };
|
|
|
|
if (execution.workgroup_size.constant != 0)
|
|
{
|
|
auto &c = get<SPIRConstant>(execution.workgroup_size.constant);
|
|
|
|
if (c.m.c[0].id[0] != 0)
|
|
{
|
|
x.id = c.m.c[0].id[0];
|
|
x.constant_id = get_decoration(c.m.c[0].id[0], DecorationSpecId);
|
|
}
|
|
|
|
if (c.m.c[0].id[1] != 0)
|
|
{
|
|
y.id = c.m.c[0].id[1];
|
|
y.constant_id = get_decoration(c.m.c[0].id[1], DecorationSpecId);
|
|
}
|
|
|
|
if (c.m.c[0].id[2] != 0)
|
|
{
|
|
z.id = c.m.c[0].id[2];
|
|
z.constant_id = get_decoration(c.m.c[0].id[2], DecorationSpecId);
|
|
}
|
|
}
|
|
|
|
return execution.workgroup_size.constant;
|
|
}
|
|
|
|
uint32_t Compiler::get_execution_mode_argument(spv::ExecutionMode mode, uint32_t index) const
|
|
{
|
|
auto &execution = get_entry_point();
|
|
switch (mode)
|
|
{
|
|
case ExecutionModeLocalSize:
|
|
switch (index)
|
|
{
|
|
case 0:
|
|
return execution.workgroup_size.x;
|
|
case 1:
|
|
return execution.workgroup_size.y;
|
|
case 2:
|
|
return execution.workgroup_size.z;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
case ExecutionModeInvocations:
|
|
return execution.invocations;
|
|
|
|
case ExecutionModeOutputVertices:
|
|
return execution.output_vertices;
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
ExecutionModel Compiler::get_execution_model() const
|
|
{
|
|
auto &execution = get_entry_point();
|
|
return execution.model;
|
|
}
|
|
|
|
void Compiler::set_remapped_variable_state(uint32_t id, bool remap_enable)
|
|
{
|
|
get<SPIRVariable>(id).remapped_variable = remap_enable;
|
|
}
|
|
|
|
bool Compiler::get_remapped_variable_state(uint32_t id) const
|
|
{
|
|
return get<SPIRVariable>(id).remapped_variable;
|
|
}
|
|
|
|
void Compiler::set_subpass_input_remapped_components(uint32_t id, uint32_t components)
|
|
{
|
|
get<SPIRVariable>(id).remapped_components = components;
|
|
}
|
|
|
|
uint32_t Compiler::get_subpass_input_remapped_components(uint32_t id) const
|
|
{
|
|
return get<SPIRVariable>(id).remapped_components;
|
|
}
|
|
|
|
void Compiler::add_implied_read_expression(SPIRExpression &e, uint32_t source)
|
|
{
|
|
auto itr = find(begin(e.implied_read_expressions), end(e.implied_read_expressions), source);
|
|
if (itr == end(e.implied_read_expressions))
|
|
e.implied_read_expressions.push_back(source);
|
|
}
|
|
|
|
void Compiler::add_implied_read_expression(SPIRAccessChain &e, uint32_t source)
|
|
{
|
|
auto itr = find(begin(e.implied_read_expressions), end(e.implied_read_expressions), source);
|
|
if (itr == end(e.implied_read_expressions))
|
|
e.implied_read_expressions.push_back(source);
|
|
}
|
|
|
|
void Compiler::inherit_expression_dependencies(uint32_t dst, uint32_t source_expression)
|
|
{
|
|
// Don't inherit any expression dependencies if the expression in dst
|
|
// is not a forwarded temporary.
|
|
if (forwarded_temporaries.find(dst) == end(forwarded_temporaries) ||
|
|
forced_temporaries.find(dst) != end(forced_temporaries))
|
|
{
|
|
return;
|
|
}
|
|
|
|
auto &e = get<SPIRExpression>(dst);
|
|
auto *phi = maybe_get<SPIRVariable>(source_expression);
|
|
if (phi && phi->phi_variable)
|
|
{
|
|
// We have used a phi variable, which can change at the end of the block,
|
|
// so make sure we take a dependency on this phi variable.
|
|
phi->dependees.push_back(dst);
|
|
}
|
|
|
|
auto *s = maybe_get<SPIRExpression>(source_expression);
|
|
if (!s)
|
|
return;
|
|
|
|
auto &e_deps = e.expression_dependencies;
|
|
auto &s_deps = s->expression_dependencies;
|
|
|
|
// If we depend on a expression, we also depend on all sub-dependencies from source.
|
|
e_deps.push_back(source_expression);
|
|
e_deps.insert(end(e_deps), begin(s_deps), end(s_deps));
|
|
|
|
// Eliminate duplicated dependencies.
|
|
sort(begin(e_deps), end(e_deps));
|
|
e_deps.erase(unique(begin(e_deps), end(e_deps)), end(e_deps));
|
|
}
|
|
|
|
vector<string> Compiler::get_entry_points() const
|
|
{
|
|
vector<string> entries;
|
|
for (auto &entry : ir.entry_points)
|
|
entries.push_back(entry.second.orig_name);
|
|
return entries;
|
|
}
|
|
|
|
vector<EntryPoint> Compiler::get_entry_points_and_stages() const
|
|
{
|
|
vector<EntryPoint> entries;
|
|
for (auto &entry : ir.entry_points)
|
|
entries.push_back({ entry.second.orig_name, entry.second.model });
|
|
return entries;
|
|
}
|
|
|
|
void Compiler::rename_entry_point(const std::string &old_name, const std::string &new_name)
|
|
{
|
|
auto &entry = get_first_entry_point(old_name);
|
|
entry.orig_name = new_name;
|
|
entry.name = new_name;
|
|
}
|
|
|
|
void Compiler::rename_entry_point(const std::string &old_name, const std::string &new_name, spv::ExecutionModel model)
|
|
{
|
|
auto &entry = get_entry_point(old_name, model);
|
|
entry.orig_name = new_name;
|
|
entry.name = new_name;
|
|
}
|
|
|
|
void Compiler::set_entry_point(const std::string &name)
|
|
{
|
|
auto &entry = get_first_entry_point(name);
|
|
ir.default_entry_point = entry.self;
|
|
}
|
|
|
|
void Compiler::set_entry_point(const std::string &name, spv::ExecutionModel model)
|
|
{
|
|
auto &entry = get_entry_point(name, model);
|
|
ir.default_entry_point = entry.self;
|
|
}
|
|
|
|
SPIREntryPoint &Compiler::get_entry_point(const std::string &name)
|
|
{
|
|
return get_first_entry_point(name);
|
|
}
|
|
|
|
const SPIREntryPoint &Compiler::get_entry_point(const std::string &name) const
|
|
{
|
|
return get_first_entry_point(name);
|
|
}
|
|
|
|
SPIREntryPoint &Compiler::get_first_entry_point(const std::string &name)
|
|
{
|
|
auto itr = find_if(
|
|
begin(ir.entry_points), end(ir.entry_points),
|
|
[&](const std::pair<uint32_t, SPIREntryPoint> &entry) -> bool { return entry.second.orig_name == name; });
|
|
|
|
if (itr == end(ir.entry_points))
|
|
SPIRV_CROSS_THROW("Entry point does not exist.");
|
|
|
|
return itr->second;
|
|
}
|
|
|
|
const SPIREntryPoint &Compiler::get_first_entry_point(const std::string &name) const
|
|
{
|
|
auto itr = find_if(
|
|
begin(ir.entry_points), end(ir.entry_points),
|
|
[&](const std::pair<uint32_t, SPIREntryPoint> &entry) -> bool { return entry.second.orig_name == name; });
|
|
|
|
if (itr == end(ir.entry_points))
|
|
SPIRV_CROSS_THROW("Entry point does not exist.");
|
|
|
|
return itr->second;
|
|
}
|
|
|
|
SPIREntryPoint &Compiler::get_entry_point(const std::string &name, ExecutionModel model)
|
|
{
|
|
auto itr = find_if(begin(ir.entry_points), end(ir.entry_points),
|
|
[&](const std::pair<uint32_t, SPIREntryPoint> &entry) -> bool {
|
|
return entry.second.orig_name == name && entry.second.model == model;
|
|
});
|
|
|
|
if (itr == end(ir.entry_points))
|
|
SPIRV_CROSS_THROW("Entry point does not exist.");
|
|
|
|
return itr->second;
|
|
}
|
|
|
|
const SPIREntryPoint &Compiler::get_entry_point(const std::string &name, ExecutionModel model) const
|
|
{
|
|
auto itr = find_if(begin(ir.entry_points), end(ir.entry_points),
|
|
[&](const std::pair<uint32_t, SPIREntryPoint> &entry) -> bool {
|
|
return entry.second.orig_name == name && entry.second.model == model;
|
|
});
|
|
|
|
if (itr == end(ir.entry_points))
|
|
SPIRV_CROSS_THROW("Entry point does not exist.");
|
|
|
|
return itr->second;
|
|
}
|
|
|
|
const string &Compiler::get_cleansed_entry_point_name(const std::string &name) const
|
|
{
|
|
return get_first_entry_point(name).name;
|
|
}
|
|
|
|
const string &Compiler::get_cleansed_entry_point_name(const std::string &name, ExecutionModel model) const
|
|
{
|
|
return get_entry_point(name, model).name;
|
|
}
|
|
|
|
const SPIREntryPoint &Compiler::get_entry_point() const
|
|
{
|
|
return ir.entry_points.find(ir.default_entry_point)->second;
|
|
}
|
|
|
|
SPIREntryPoint &Compiler::get_entry_point()
|
|
{
|
|
return ir.entry_points.find(ir.default_entry_point)->second;
|
|
}
|
|
|
|
bool Compiler::interface_variable_exists_in_entry_point(uint32_t id) const
|
|
{
|
|
auto &var = get<SPIRVariable>(id);
|
|
if (var.storage != StorageClassInput && var.storage != StorageClassOutput &&
|
|
var.storage != StorageClassUniformConstant)
|
|
SPIRV_CROSS_THROW("Only Input, Output variables and Uniform constants are part of a shader linking interface.");
|
|
|
|
// This is to avoid potential problems with very old glslang versions which did
|
|
// not emit input/output interfaces properly.
|
|
// We can assume they only had a single entry point, and single entry point
|
|
// shaders could easily be assumed to use every interface variable anyways.
|
|
if (ir.entry_points.size() <= 1)
|
|
return true;
|
|
|
|
auto &execution = get_entry_point();
|
|
return find(begin(execution.interface_variables), end(execution.interface_variables), id) !=
|
|
end(execution.interface_variables);
|
|
}
|
|
|
|
void Compiler::CombinedImageSamplerHandler::push_remap_parameters(const SPIRFunction &func, const uint32_t *args,
|
|
uint32_t length)
|
|
{
|
|
// If possible, pipe through a remapping table so that parameters know
|
|
// which variables they actually bind to in this scope.
|
|
unordered_map<uint32_t, uint32_t> remapping;
|
|
for (uint32_t i = 0; i < length; i++)
|
|
remapping[func.arguments[i].id] = remap_parameter(args[i]);
|
|
parameter_remapping.push(move(remapping));
|
|
}
|
|
|
|
void Compiler::CombinedImageSamplerHandler::pop_remap_parameters()
|
|
{
|
|
parameter_remapping.pop();
|
|
}
|
|
|
|
uint32_t Compiler::CombinedImageSamplerHandler::remap_parameter(uint32_t id)
|
|
{
|
|
auto *var = compiler.maybe_get_backing_variable(id);
|
|
if (var)
|
|
id = var->self;
|
|
|
|
if (parameter_remapping.empty())
|
|
return id;
|
|
|
|
auto &remapping = parameter_remapping.top();
|
|
auto itr = remapping.find(id);
|
|
if (itr != end(remapping))
|
|
return itr->second;
|
|
else
|
|
return id;
|
|
}
|
|
|
|
bool Compiler::CombinedImageSamplerHandler::begin_function_scope(const uint32_t *args, uint32_t length)
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
auto &callee = compiler.get<SPIRFunction>(args[2]);
|
|
args += 3;
|
|
length -= 3;
|
|
push_remap_parameters(callee, args, length);
|
|
functions.push(&callee);
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::CombinedImageSamplerHandler::end_function_scope(const uint32_t *args, uint32_t length)
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
auto &callee = compiler.get<SPIRFunction>(args[2]);
|
|
args += 3;
|
|
|
|
// There are two types of cases we have to handle,
|
|
// a callee might call sampler2D(texture2D, sampler) directly where
|
|
// one or more parameters originate from parameters.
|
|
// Alternatively, we need to provide combined image samplers to our callees,
|
|
// and in this case we need to add those as well.
|
|
|
|
pop_remap_parameters();
|
|
|
|
// Our callee has now been processed at least once.
|
|
// No point in doing it again.
|
|
callee.do_combined_parameters = false;
|
|
|
|
auto ¶ms = functions.top()->combined_parameters;
|
|
functions.pop();
|
|
if (functions.empty())
|
|
return true;
|
|
|
|
auto &caller = *functions.top();
|
|
if (caller.do_combined_parameters)
|
|
{
|
|
for (auto ¶m : params)
|
|
{
|
|
uint32_t image_id = param.global_image ? param.image_id : args[param.image_id];
|
|
uint32_t sampler_id = param.global_sampler ? param.sampler_id : args[param.sampler_id];
|
|
|
|
auto *i = compiler.maybe_get_backing_variable(image_id);
|
|
auto *s = compiler.maybe_get_backing_variable(sampler_id);
|
|
if (i)
|
|
image_id = i->self;
|
|
if (s)
|
|
sampler_id = s->self;
|
|
|
|
register_combined_image_sampler(caller, image_id, sampler_id, param.depth);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void Compiler::CombinedImageSamplerHandler::register_combined_image_sampler(SPIRFunction &caller, uint32_t image_id,
|
|
uint32_t sampler_id, bool depth)
|
|
{
|
|
// We now have a texture ID and a sampler ID which will either be found as a global
|
|
// or a parameter in our own function. If both are global, they will not need a parameter,
|
|
// otherwise, add it to our list.
|
|
SPIRFunction::CombinedImageSamplerParameter param = {
|
|
0u, image_id, sampler_id, true, true, depth,
|
|
};
|
|
|
|
auto texture_itr = find_if(begin(caller.arguments), end(caller.arguments),
|
|
[image_id](const SPIRFunction::Parameter &p) { return p.id == image_id; });
|
|
auto sampler_itr = find_if(begin(caller.arguments), end(caller.arguments),
|
|
[sampler_id](const SPIRFunction::Parameter &p) { return p.id == sampler_id; });
|
|
|
|
if (texture_itr != end(caller.arguments))
|
|
{
|
|
param.global_image = false;
|
|
param.image_id = uint32_t(texture_itr - begin(caller.arguments));
|
|
}
|
|
|
|
if (sampler_itr != end(caller.arguments))
|
|
{
|
|
param.global_sampler = false;
|
|
param.sampler_id = uint32_t(sampler_itr - begin(caller.arguments));
|
|
}
|
|
|
|
if (param.global_image && param.global_sampler)
|
|
return;
|
|
|
|
auto itr = find_if(begin(caller.combined_parameters), end(caller.combined_parameters),
|
|
[¶m](const SPIRFunction::CombinedImageSamplerParameter &p) {
|
|
return param.image_id == p.image_id && param.sampler_id == p.sampler_id &&
|
|
param.global_image == p.global_image && param.global_sampler == p.global_sampler;
|
|
});
|
|
|
|
if (itr == end(caller.combined_parameters))
|
|
{
|
|
uint32_t id = compiler.ir.increase_bound_by(3);
|
|
auto type_id = id + 0;
|
|
auto ptr_type_id = id + 1;
|
|
auto combined_id = id + 2;
|
|
auto &base = compiler.expression_type(image_id);
|
|
auto &type = compiler.set<SPIRType>(type_id);
|
|
auto &ptr_type = compiler.set<SPIRType>(ptr_type_id);
|
|
|
|
type = base;
|
|
type.self = type_id;
|
|
type.basetype = SPIRType::SampledImage;
|
|
type.pointer = false;
|
|
type.storage = StorageClassGeneric;
|
|
type.image.depth = depth;
|
|
|
|
ptr_type = type;
|
|
ptr_type.pointer = true;
|
|
ptr_type.storage = StorageClassUniformConstant;
|
|
ptr_type.parent_type = type_id;
|
|
|
|
// Build new variable.
|
|
compiler.set<SPIRVariable>(combined_id, ptr_type_id, StorageClassFunction, 0);
|
|
|
|
// Inherit RelaxedPrecision (and potentially other useful flags if deemed relevant).
|
|
auto &new_flags = compiler.ir.meta[combined_id].decoration.decoration_flags;
|
|
auto &old_flags = compiler.ir.meta[sampler_id].decoration.decoration_flags;
|
|
new_flags.reset();
|
|
if (old_flags.get(DecorationRelaxedPrecision))
|
|
new_flags.set(DecorationRelaxedPrecision);
|
|
|
|
param.id = combined_id;
|
|
|
|
compiler.set_name(combined_id,
|
|
join("SPIRV_Cross_Combined", compiler.to_name(image_id), compiler.to_name(sampler_id)));
|
|
|
|
caller.combined_parameters.push_back(param);
|
|
caller.shadow_arguments.push_back({ ptr_type_id, combined_id, 0u, 0u, true });
|
|
}
|
|
}
|
|
|
|
bool Compiler::DummySamplerForCombinedImageHandler::handle(Op opcode, const uint32_t *args, uint32_t length)
|
|
{
|
|
if (need_dummy_sampler)
|
|
{
|
|
// No need to traverse further, we know the result.
|
|
return false;
|
|
}
|
|
|
|
switch (opcode)
|
|
{
|
|
case OpLoad:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
uint32_t result_type = args[0];
|
|
|
|
auto &type = compiler.get<SPIRType>(result_type);
|
|
bool separate_image =
|
|
type.basetype == SPIRType::Image && type.image.sampled == 1 && type.image.dim != DimBuffer;
|
|
|
|
// If not separate image, don't bother.
|
|
if (!separate_image)
|
|
return true;
|
|
|
|
uint32_t id = args[1];
|
|
uint32_t ptr = args[2];
|
|
compiler.set<SPIRExpression>(id, "", result_type, true);
|
|
compiler.register_read(id, ptr, true);
|
|
break;
|
|
}
|
|
|
|
case OpImageFetch:
|
|
case OpImageQuerySizeLod:
|
|
case OpImageQuerySize:
|
|
case OpImageQueryLevels:
|
|
case OpImageQuerySamples:
|
|
{
|
|
// If we are fetching or querying LOD from a plain OpTypeImage, we must pre-combine with our dummy sampler.
|
|
auto *var = compiler.maybe_get_backing_variable(args[2]);
|
|
if (var)
|
|
{
|
|
auto &type = compiler.get<SPIRType>(var->basetype);
|
|
if (type.basetype == SPIRType::Image && type.image.sampled == 1 && type.image.dim != DimBuffer)
|
|
need_dummy_sampler = true;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case OpInBoundsAccessChain:
|
|
case OpAccessChain:
|
|
case OpPtrAccessChain:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
uint32_t result_type = args[0];
|
|
auto &type = compiler.get<SPIRType>(result_type);
|
|
bool separate_image =
|
|
type.basetype == SPIRType::Image && type.image.sampled == 1 && type.image.dim != DimBuffer;
|
|
if (!separate_image)
|
|
return true;
|
|
|
|
uint32_t id = args[1];
|
|
uint32_t ptr = args[2];
|
|
compiler.set<SPIRExpression>(id, "", result_type, true);
|
|
compiler.register_read(id, ptr, true);
|
|
|
|
// Other backends might use SPIRAccessChain for this later.
|
|
compiler.ir.ids[id].set_allow_type_rewrite();
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::CombinedImageSamplerHandler::handle(Op opcode, const uint32_t *args, uint32_t length)
|
|
{
|
|
// We need to figure out where samplers and images are loaded from, so do only the bare bones compilation we need.
|
|
bool is_fetch = false;
|
|
|
|
switch (opcode)
|
|
{
|
|
case OpLoad:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
uint32_t result_type = args[0];
|
|
|
|
auto &type = compiler.get<SPIRType>(result_type);
|
|
bool separate_image = type.basetype == SPIRType::Image && type.image.sampled == 1;
|
|
bool separate_sampler = type.basetype == SPIRType::Sampler;
|
|
|
|
// If not separate image or sampler, don't bother.
|
|
if (!separate_image && !separate_sampler)
|
|
return true;
|
|
|
|
uint32_t id = args[1];
|
|
uint32_t ptr = args[2];
|
|
compiler.set<SPIRExpression>(id, "", result_type, true);
|
|
compiler.register_read(id, ptr, true);
|
|
return true;
|
|
}
|
|
|
|
case OpInBoundsAccessChain:
|
|
case OpAccessChain:
|
|
case OpPtrAccessChain:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
// Technically, it is possible to have arrays of textures and arrays of samplers and combine them, but this becomes essentially
|
|
// impossible to implement, since we don't know which concrete sampler we are accessing.
|
|
// One potential way is to create a combinatorial explosion where N textures and M samplers are combined into N * M sampler2Ds,
|
|
// but this seems ridiculously complicated for a problem which is easy to work around.
|
|
// Checking access chains like this assumes we don't have samplers or textures inside uniform structs, but this makes no sense.
|
|
|
|
uint32_t result_type = args[0];
|
|
|
|
auto &type = compiler.get<SPIRType>(result_type);
|
|
bool separate_image = type.basetype == SPIRType::Image && type.image.sampled == 1;
|
|
bool separate_sampler = type.basetype == SPIRType::Sampler;
|
|
if (separate_sampler)
|
|
SPIRV_CROSS_THROW(
|
|
"Attempting to use arrays or structs of separate samplers. This is not possible to statically "
|
|
"remap to plain GLSL.");
|
|
|
|
if (separate_image)
|
|
{
|
|
uint32_t id = args[1];
|
|
uint32_t ptr = args[2];
|
|
compiler.set<SPIRExpression>(id, "", result_type, true);
|
|
compiler.register_read(id, ptr, true);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
case OpImageFetch:
|
|
case OpImageQuerySizeLod:
|
|
case OpImageQuerySize:
|
|
case OpImageQueryLevels:
|
|
case OpImageQuerySamples:
|
|
{
|
|
// If we are fetching from a plain OpTypeImage or querying LOD, we must pre-combine with our dummy sampler.
|
|
auto *var = compiler.maybe_get_backing_variable(args[2]);
|
|
if (!var)
|
|
return true;
|
|
|
|
auto &type = compiler.get<SPIRType>(var->basetype);
|
|
if (type.basetype == SPIRType::Image && type.image.sampled == 1 && type.image.dim != DimBuffer)
|
|
{
|
|
if (compiler.dummy_sampler_id == 0)
|
|
SPIRV_CROSS_THROW("texelFetch without sampler was found, but no dummy sampler has been created with "
|
|
"build_dummy_sampler_for_combined_images().");
|
|
|
|
// Do it outside.
|
|
is_fetch = true;
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
case OpSampledImage:
|
|
// Do it outside.
|
|
break;
|
|
|
|
default:
|
|
return true;
|
|
}
|
|
|
|
// Registers sampler2D calls used in case they are parameters so
|
|
// that their callees know which combined image samplers to propagate down the call stack.
|
|
if (!functions.empty())
|
|
{
|
|
auto &callee = *functions.top();
|
|
if (callee.do_combined_parameters)
|
|
{
|
|
uint32_t image_id = args[2];
|
|
|
|
auto *image = compiler.maybe_get_backing_variable(image_id);
|
|
if (image)
|
|
image_id = image->self;
|
|
|
|
uint32_t sampler_id = is_fetch ? compiler.dummy_sampler_id : args[3];
|
|
auto *sampler = compiler.maybe_get_backing_variable(sampler_id);
|
|
if (sampler)
|
|
sampler_id = sampler->self;
|
|
|
|
auto &combined_type = compiler.get<SPIRType>(args[0]);
|
|
register_combined_image_sampler(callee, image_id, sampler_id, combined_type.image.depth);
|
|
}
|
|
}
|
|
|
|
// For function calls, we need to remap IDs which are function parameters into global variables.
|
|
// This information is statically known from the current place in the call stack.
|
|
// Function parameters are not necessarily pointers, so if we don't have a backing variable, remapping will know
|
|
// which backing variable the image/sample came from.
|
|
uint32_t image_id = remap_parameter(args[2]);
|
|
uint32_t sampler_id = is_fetch ? compiler.dummy_sampler_id : remap_parameter(args[3]);
|
|
|
|
auto itr = find_if(begin(compiler.combined_image_samplers), end(compiler.combined_image_samplers),
|
|
[image_id, sampler_id](const CombinedImageSampler &combined) {
|
|
return combined.image_id == image_id && combined.sampler_id == sampler_id;
|
|
});
|
|
|
|
if (itr == end(compiler.combined_image_samplers))
|
|
{
|
|
uint32_t sampled_type;
|
|
if (is_fetch)
|
|
{
|
|
// Have to invent the sampled image type.
|
|
sampled_type = compiler.ir.increase_bound_by(1);
|
|
auto &type = compiler.set<SPIRType>(sampled_type);
|
|
type = compiler.expression_type(args[2]);
|
|
type.self = sampled_type;
|
|
type.basetype = SPIRType::SampledImage;
|
|
type.image.depth = false;
|
|
}
|
|
else
|
|
{
|
|
sampled_type = args[0];
|
|
}
|
|
|
|
auto id = compiler.ir.increase_bound_by(2);
|
|
auto type_id = id + 0;
|
|
auto combined_id = id + 1;
|
|
|
|
// Make a new type, pointer to OpTypeSampledImage, so we can make a variable of this type.
|
|
// We will probably have this type lying around, but it doesn't hurt to make duplicates for internal purposes.
|
|
auto &type = compiler.set<SPIRType>(type_id);
|
|
auto &base = compiler.get<SPIRType>(sampled_type);
|
|
type = base;
|
|
type.pointer = true;
|
|
type.storage = StorageClassUniformConstant;
|
|
type.parent_type = type_id;
|
|
|
|
// Build new variable.
|
|
compiler.set<SPIRVariable>(combined_id, type_id, StorageClassUniformConstant, 0);
|
|
|
|
// Inherit RelaxedPrecision (and potentially other useful flags if deemed relevant).
|
|
auto &new_flags = compiler.ir.meta[combined_id].decoration.decoration_flags;
|
|
// Fetch inherits precision from the image, not sampler (there is no sampler).
|
|
auto &old_flags = compiler.ir.meta[is_fetch ? image_id : sampler_id].decoration.decoration_flags;
|
|
new_flags.reset();
|
|
if (old_flags.get(DecorationRelaxedPrecision))
|
|
new_flags.set(DecorationRelaxedPrecision);
|
|
|
|
// Propagate the array type for the original image as well.
|
|
auto *var = compiler.maybe_get_backing_variable(image_id);
|
|
if (var)
|
|
{
|
|
auto &parent_type = compiler.get<SPIRType>(var->basetype);
|
|
type.array = parent_type.array;
|
|
type.array_size_literal = parent_type.array_size_literal;
|
|
}
|
|
|
|
compiler.combined_image_samplers.push_back({ combined_id, image_id, sampler_id });
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
uint32_t Compiler::build_dummy_sampler_for_combined_images()
|
|
{
|
|
DummySamplerForCombinedImageHandler handler(*this);
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), handler);
|
|
if (handler.need_dummy_sampler)
|
|
{
|
|
uint32_t offset = ir.increase_bound_by(3);
|
|
auto type_id = offset + 0;
|
|
auto ptr_type_id = offset + 1;
|
|
auto var_id = offset + 2;
|
|
|
|
SPIRType sampler_type;
|
|
auto &sampler = set<SPIRType>(type_id);
|
|
sampler.basetype = SPIRType::Sampler;
|
|
|
|
auto &ptr_sampler = set<SPIRType>(ptr_type_id);
|
|
ptr_sampler = sampler;
|
|
ptr_sampler.self = type_id;
|
|
ptr_sampler.storage = StorageClassUniformConstant;
|
|
ptr_sampler.pointer = true;
|
|
ptr_sampler.parent_type = type_id;
|
|
|
|
set<SPIRVariable>(var_id, ptr_type_id, StorageClassUniformConstant, 0);
|
|
set_name(var_id, "SPIRV_Cross_DummySampler");
|
|
dummy_sampler_id = var_id;
|
|
return var_id;
|
|
}
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
void Compiler::build_combined_image_samplers()
|
|
{
|
|
for (auto &id : ir.ids)
|
|
{
|
|
if (id.get_type() == TypeFunction)
|
|
{
|
|
auto &func = id.get<SPIRFunction>();
|
|
func.combined_parameters.clear();
|
|
func.shadow_arguments.clear();
|
|
func.do_combined_parameters = true;
|
|
}
|
|
}
|
|
|
|
combined_image_samplers.clear();
|
|
CombinedImageSamplerHandler handler(*this);
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), handler);
|
|
}
|
|
|
|
vector<SpecializationConstant> Compiler::get_specialization_constants() const
|
|
{
|
|
vector<SpecializationConstant> spec_consts;
|
|
for (auto &id : ir.ids)
|
|
{
|
|
if (id.get_type() == TypeConstant)
|
|
{
|
|
auto &c = id.get<SPIRConstant>();
|
|
if (c.specialization && has_decoration(c.self, DecorationSpecId))
|
|
spec_consts.push_back({ c.self, get_decoration(c.self, DecorationSpecId) });
|
|
}
|
|
}
|
|
return spec_consts;
|
|
}
|
|
|
|
SPIRConstant &Compiler::get_constant(uint32_t id)
|
|
{
|
|
return get<SPIRConstant>(id);
|
|
}
|
|
|
|
const SPIRConstant &Compiler::get_constant(uint32_t id) const
|
|
{
|
|
return get<SPIRConstant>(id);
|
|
}
|
|
|
|
static bool exists_unaccessed_path_to_return(const CFG &cfg, uint32_t block, const unordered_set<uint32_t> &blocks)
|
|
{
|
|
// This block accesses the variable.
|
|
if (blocks.find(block) != end(blocks))
|
|
return false;
|
|
|
|
// We are at the end of the CFG.
|
|
if (cfg.get_succeeding_edges(block).empty())
|
|
return true;
|
|
|
|
// If any of our successors have a path to the end, there exists a path from block.
|
|
for (auto &succ : cfg.get_succeeding_edges(block))
|
|
if (exists_unaccessed_path_to_return(cfg, succ, blocks))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
void Compiler::analyze_parameter_preservation(
|
|
SPIRFunction &entry, const CFG &cfg, const unordered_map<uint32_t, unordered_set<uint32_t>> &variable_to_blocks,
|
|
const unordered_map<uint32_t, unordered_set<uint32_t>> &complete_write_blocks)
|
|
{
|
|
for (auto &arg : entry.arguments)
|
|
{
|
|
// Non-pointers are always inputs.
|
|
auto &type = get<SPIRType>(arg.type);
|
|
if (!type.pointer)
|
|
continue;
|
|
|
|
// Opaque argument types are always in
|
|
bool potential_preserve;
|
|
switch (type.basetype)
|
|
{
|
|
case SPIRType::Sampler:
|
|
case SPIRType::Image:
|
|
case SPIRType::SampledImage:
|
|
case SPIRType::AtomicCounter:
|
|
potential_preserve = false;
|
|
break;
|
|
|
|
default:
|
|
potential_preserve = true;
|
|
break;
|
|
}
|
|
|
|
if (!potential_preserve)
|
|
continue;
|
|
|
|
auto itr = variable_to_blocks.find(arg.id);
|
|
if (itr == end(variable_to_blocks))
|
|
{
|
|
// Variable is never accessed.
|
|
continue;
|
|
}
|
|
|
|
// We have accessed a variable, but there was no complete writes to that variable.
|
|
// We deduce that we must preserve the argument.
|
|
itr = complete_write_blocks.find(arg.id);
|
|
if (itr == end(complete_write_blocks))
|
|
{
|
|
arg.read_count++;
|
|
continue;
|
|
}
|
|
|
|
// If there is a path through the CFG where no block completely writes to the variable, the variable will be in an undefined state
|
|
// when the function returns. We therefore need to implicitly preserve the variable in case there are writers in the function.
|
|
// Major case here is if a function is
|
|
// void foo(int &var) { if (cond) var = 10; }
|
|
// Using read/write counts, we will think it's just an out variable, but it really needs to be inout,
|
|
// because if we don't write anything whatever we put into the function must return back to the caller.
|
|
if (exists_unaccessed_path_to_return(cfg, entry.entry_block, itr->second))
|
|
arg.read_count++;
|
|
}
|
|
}
|
|
|
|
Compiler::AnalyzeVariableScopeAccessHandler::AnalyzeVariableScopeAccessHandler(Compiler &compiler_,
|
|
SPIRFunction &entry_)
|
|
: compiler(compiler_)
|
|
, entry(entry_)
|
|
{
|
|
}
|
|
|
|
bool Compiler::AnalyzeVariableScopeAccessHandler::follow_function_call(const SPIRFunction &)
|
|
{
|
|
// Only analyze within this function.
|
|
return false;
|
|
}
|
|
|
|
void Compiler::AnalyzeVariableScopeAccessHandler::set_current_block(const SPIRBlock &block)
|
|
{
|
|
current_block = █
|
|
|
|
// If we're branching to a block which uses OpPhi, in GLSL
|
|
// this will be a variable write when we branch,
|
|
// so we need to track access to these variables as well to
|
|
// have a complete picture.
|
|
const auto test_phi = [this, &block](uint32_t to) {
|
|
auto &next = compiler.get<SPIRBlock>(to);
|
|
for (auto &phi : next.phi_variables)
|
|
{
|
|
if (phi.parent == block.self)
|
|
{
|
|
accessed_variables_to_block[phi.function_variable].insert(block.self);
|
|
// Phi variables are also accessed in our target branch block.
|
|
accessed_variables_to_block[phi.function_variable].insert(next.self);
|
|
|
|
notify_variable_access(phi.local_variable, block.self);
|
|
}
|
|
}
|
|
};
|
|
|
|
switch (block.terminator)
|
|
{
|
|
case SPIRBlock::Direct:
|
|
notify_variable_access(block.condition, block.self);
|
|
test_phi(block.next_block);
|
|
break;
|
|
|
|
case SPIRBlock::Select:
|
|
notify_variable_access(block.condition, block.self);
|
|
test_phi(block.true_block);
|
|
test_phi(block.false_block);
|
|
break;
|
|
|
|
case SPIRBlock::MultiSelect:
|
|
notify_variable_access(block.condition, block.self);
|
|
for (auto &target : block.cases)
|
|
test_phi(target.block);
|
|
if (block.default_block)
|
|
test_phi(block.default_block);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Compiler::AnalyzeVariableScopeAccessHandler::notify_variable_access(uint32_t id, uint32_t block)
|
|
{
|
|
if (id_is_phi_variable(id))
|
|
accessed_variables_to_block[id].insert(block);
|
|
else if (id_is_potential_temporary(id))
|
|
accessed_temporaries_to_block[id].insert(block);
|
|
}
|
|
|
|
bool Compiler::AnalyzeVariableScopeAccessHandler::id_is_phi_variable(uint32_t id) const
|
|
{
|
|
if (id >= compiler.get_current_id_bound())
|
|
return false;
|
|
auto *var = compiler.maybe_get<SPIRVariable>(id);
|
|
return var && var->phi_variable;
|
|
}
|
|
|
|
bool Compiler::AnalyzeVariableScopeAccessHandler::id_is_potential_temporary(uint32_t id) const
|
|
{
|
|
if (id >= compiler.get_current_id_bound())
|
|
return false;
|
|
|
|
// Temporaries are not created before we start emitting code.
|
|
return compiler.ir.ids[id].empty() || (compiler.ir.ids[id].get_type() == TypeExpression);
|
|
}
|
|
|
|
bool Compiler::AnalyzeVariableScopeAccessHandler::handle(spv::Op op, const uint32_t *args, uint32_t length)
|
|
{
|
|
// Keep track of the types of temporaries, so we can hoist them out as necessary.
|
|
uint32_t result_type, result_id;
|
|
if (compiler.instruction_to_result_type(result_type, result_id, op, args, length))
|
|
result_id_to_type[result_id] = result_type;
|
|
|
|
switch (op)
|
|
{
|
|
case OpStore:
|
|
{
|
|
if (length < 2)
|
|
return false;
|
|
|
|
uint32_t ptr = args[0];
|
|
auto *var = compiler.maybe_get_backing_variable(ptr);
|
|
|
|
// If we store through an access chain, we have a partial write.
|
|
if (var)
|
|
{
|
|
accessed_variables_to_block[var->self].insert(current_block->self);
|
|
if (var->self == ptr)
|
|
complete_write_variables_to_block[var->self].insert(current_block->self);
|
|
else
|
|
partial_write_variables_to_block[var->self].insert(current_block->self);
|
|
}
|
|
|
|
// Might try to store a Phi variable here.
|
|
notify_variable_access(args[1], current_block->self);
|
|
break;
|
|
}
|
|
|
|
case OpAccessChain:
|
|
case OpInBoundsAccessChain:
|
|
case OpPtrAccessChain:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
uint32_t ptr = args[2];
|
|
auto *var = compiler.maybe_get<SPIRVariable>(ptr);
|
|
if (var)
|
|
accessed_variables_to_block[var->self].insert(current_block->self);
|
|
|
|
for (uint32_t i = 3; i < length; i++)
|
|
notify_variable_access(args[i], current_block->self);
|
|
|
|
// The result of an access chain is a fixed expression and is not really considered a temporary.
|
|
auto &e = compiler.set<SPIRExpression>(args[1], "", args[0], true);
|
|
auto *backing_variable = compiler.maybe_get_backing_variable(ptr);
|
|
e.loaded_from = backing_variable ? backing_variable->self : 0;
|
|
|
|
// Other backends might use SPIRAccessChain for this later.
|
|
compiler.ir.ids[args[1]].set_allow_type_rewrite();
|
|
break;
|
|
}
|
|
|
|
case OpCopyMemory:
|
|
{
|
|
if (length < 2)
|
|
return false;
|
|
|
|
uint32_t lhs = args[0];
|
|
uint32_t rhs = args[1];
|
|
auto *var = compiler.maybe_get_backing_variable(lhs);
|
|
|
|
// If we store through an access chain, we have a partial write.
|
|
if (var)
|
|
{
|
|
accessed_variables_to_block[var->self].insert(current_block->self);
|
|
if (var->self == lhs)
|
|
complete_write_variables_to_block[var->self].insert(current_block->self);
|
|
else
|
|
partial_write_variables_to_block[var->self].insert(current_block->self);
|
|
}
|
|
|
|
var = compiler.maybe_get_backing_variable(rhs);
|
|
if (var)
|
|
accessed_variables_to_block[var->self].insert(current_block->self);
|
|
break;
|
|
}
|
|
|
|
case OpCopyObject:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
auto *var = compiler.maybe_get_backing_variable(args[2]);
|
|
if (var)
|
|
accessed_variables_to_block[var->self].insert(current_block->self);
|
|
|
|
// Might try to copy a Phi variable here.
|
|
notify_variable_access(args[2], current_block->self);
|
|
break;
|
|
}
|
|
|
|
case OpLoad:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
uint32_t ptr = args[2];
|
|
auto *var = compiler.maybe_get_backing_variable(ptr);
|
|
if (var)
|
|
accessed_variables_to_block[var->self].insert(current_block->self);
|
|
|
|
// Loaded value is a temporary.
|
|
notify_variable_access(args[1], current_block->self);
|
|
break;
|
|
}
|
|
|
|
case OpFunctionCall:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
length -= 3;
|
|
args += 3;
|
|
|
|
for (uint32_t i = 0; i < length; i++)
|
|
{
|
|
auto *var = compiler.maybe_get_backing_variable(args[i]);
|
|
if (var)
|
|
{
|
|
accessed_variables_to_block[var->self].insert(current_block->self);
|
|
// Assume we can get partial writes to this variable.
|
|
partial_write_variables_to_block[var->self].insert(current_block->self);
|
|
}
|
|
|
|
// Cannot easily prove if argument we pass to a function is completely written.
|
|
// Usually, functions write to a dummy variable,
|
|
// which is then copied to in full to the real argument.
|
|
|
|
// Might try to copy a Phi variable here.
|
|
notify_variable_access(args[i], current_block->self);
|
|
}
|
|
|
|
// Return value may be a temporary.
|
|
notify_variable_access(args[1], current_block->self);
|
|
break;
|
|
}
|
|
|
|
case OpExtInst:
|
|
{
|
|
for (uint32_t i = 4; i < length; i++)
|
|
notify_variable_access(args[i], current_block->self);
|
|
notify_variable_access(args[1], current_block->self);
|
|
break;
|
|
}
|
|
|
|
case OpArrayLength:
|
|
// Uses literals, but cannot be a phi variable, so ignore.
|
|
break;
|
|
|
|
// Atomics shouldn't be able to access function-local variables.
|
|
// Some GLSL builtins access a pointer.
|
|
|
|
case OpCompositeInsert:
|
|
case OpVectorShuffle:
|
|
// Specialize for opcode which contains literals.
|
|
for (uint32_t i = 1; i < 4; i++)
|
|
notify_variable_access(args[i], current_block->self);
|
|
break;
|
|
|
|
case OpCompositeExtract:
|
|
// Specialize for opcode which contains literals.
|
|
for (uint32_t i = 1; i < 3; i++)
|
|
notify_variable_access(args[i], current_block->self);
|
|
break;
|
|
|
|
default:
|
|
{
|
|
// Rather dirty way of figuring out where Phi variables are used.
|
|
// As long as only IDs are used, we can scan through instructions and try to find any evidence that
|
|
// the ID of a variable has been used.
|
|
// There are potential false positives here where a literal is used in-place of an ID,
|
|
// but worst case, it does not affect the correctness of the compile.
|
|
// Exhaustive analysis would be better here, but it's not worth it for now.
|
|
for (uint32_t i = 0; i < length; i++)
|
|
notify_variable_access(args[i], current_block->self);
|
|
break;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
Compiler::StaticExpressionAccessHandler::StaticExpressionAccessHandler(Compiler &compiler_, uint32_t variable_id_)
|
|
: compiler(compiler_)
|
|
, variable_id(variable_id_)
|
|
{
|
|
}
|
|
|
|
bool Compiler::StaticExpressionAccessHandler::follow_function_call(const SPIRFunction &)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool Compiler::StaticExpressionAccessHandler::handle(spv::Op op, const uint32_t *args, uint32_t length)
|
|
{
|
|
switch (op)
|
|
{
|
|
case OpStore:
|
|
if (length < 2)
|
|
return false;
|
|
if (args[0] == variable_id)
|
|
{
|
|
static_expression = args[1];
|
|
write_count++;
|
|
}
|
|
break;
|
|
|
|
case OpLoad:
|
|
if (length < 3)
|
|
return false;
|
|
if (args[2] == variable_id && static_expression == 0) // Tried to read from variable before it was initialized.
|
|
return false;
|
|
break;
|
|
|
|
case OpAccessChain:
|
|
case OpInBoundsAccessChain:
|
|
case OpPtrAccessChain:
|
|
if (length < 3)
|
|
return false;
|
|
if (args[2] == variable_id) // If we try to access chain our candidate variable before we store to it, bail.
|
|
return false;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void Compiler::find_function_local_luts(SPIRFunction &entry, const AnalyzeVariableScopeAccessHandler &handler)
|
|
{
|
|
auto &cfg = *function_cfgs.find(entry.self)->second;
|
|
|
|
// For each variable which is statically accessed.
|
|
for (auto &accessed_var : handler.accessed_variables_to_block)
|
|
{
|
|
auto &blocks = accessed_var.second;
|
|
auto &var = get<SPIRVariable>(accessed_var.first);
|
|
auto &type = expression_type(accessed_var.first);
|
|
|
|
// Only consider function local variables here.
|
|
if (var.storage != StorageClassFunction)
|
|
continue;
|
|
|
|
// We cannot be a phi variable.
|
|
if (var.phi_variable)
|
|
continue;
|
|
|
|
// Only consider arrays here.
|
|
if (type.array.empty())
|
|
continue;
|
|
|
|
// HACK: Do not consider structs. This is a quirk with how types are currently being emitted.
|
|
// Structs are emitted after specialization constants and composite constants.
|
|
// FIXME: Fix declaration order so declared constants can have struct types.
|
|
if (type.basetype == SPIRType::Struct)
|
|
continue;
|
|
|
|
// If the variable has an initializer, make sure it is a constant expression.
|
|
uint32_t static_constant_expression = 0;
|
|
if (var.initializer)
|
|
{
|
|
if (ir.ids[var.initializer].get_type() != TypeConstant)
|
|
continue;
|
|
static_constant_expression = var.initializer;
|
|
|
|
// There can be no stores to this variable, we have now proved we have a LUT.
|
|
if (handler.complete_write_variables_to_block.count(var.self) != 0 ||
|
|
handler.partial_write_variables_to_block.count(var.self) != 0)
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
// We can have one, and only one write to the variable, and that write needs to be a constant.
|
|
|
|
// No partial writes allowed.
|
|
if (handler.partial_write_variables_to_block.count(var.self) != 0)
|
|
continue;
|
|
|
|
auto itr = handler.complete_write_variables_to_block.find(var.self);
|
|
|
|
// No writes?
|
|
if (itr == end(handler.complete_write_variables_to_block))
|
|
continue;
|
|
|
|
// We write to the variable in more than one block.
|
|
auto &write_blocks = itr->second;
|
|
if (write_blocks.size() != 1)
|
|
continue;
|
|
|
|
// The write needs to happen in the dominating block.
|
|
DominatorBuilder builder(cfg);
|
|
for (auto &block : blocks)
|
|
builder.add_block(block);
|
|
uint32_t dominator = builder.get_dominator();
|
|
|
|
// The complete write happened in a branch or similar, cannot deduce static expression.
|
|
if (write_blocks.count(dominator) == 0)
|
|
continue;
|
|
|
|
// Find the static expression for this variable.
|
|
StaticExpressionAccessHandler static_expression_handler(*this, var.self);
|
|
traverse_all_reachable_opcodes(get<SPIRBlock>(dominator), static_expression_handler);
|
|
|
|
// We want one, and exactly one write
|
|
if (static_expression_handler.write_count != 1 || static_expression_handler.static_expression == 0)
|
|
continue;
|
|
|
|
// Is it a constant expression?
|
|
if (ir.ids[static_expression_handler.static_expression].get_type() != TypeConstant)
|
|
continue;
|
|
|
|
// We found a LUT!
|
|
static_constant_expression = static_expression_handler.static_expression;
|
|
}
|
|
|
|
get<SPIRConstant>(static_constant_expression).is_used_as_lut = true;
|
|
var.static_expression = static_constant_expression;
|
|
var.statically_assigned = true;
|
|
var.remapped_variable = true;
|
|
}
|
|
}
|
|
|
|
void Compiler::analyze_variable_scope(SPIRFunction &entry, AnalyzeVariableScopeAccessHandler &handler)
|
|
{
|
|
// First, we map out all variable access within a function.
|
|
// Essentially a map of block -> { variables accessed in the basic block }
|
|
traverse_all_reachable_opcodes(entry, handler);
|
|
|
|
auto &cfg = *function_cfgs.find(entry.self)->second;
|
|
|
|
// Analyze if there are parameters which need to be implicitly preserved with an "in" qualifier.
|
|
analyze_parameter_preservation(entry, cfg, handler.accessed_variables_to_block,
|
|
handler.complete_write_variables_to_block);
|
|
|
|
unordered_map<uint32_t, uint32_t> potential_loop_variables;
|
|
|
|
// For each variable which is statically accessed.
|
|
for (auto &var : handler.accessed_variables_to_block)
|
|
{
|
|
// Only deal with variables which are considered local variables in this function.
|
|
if (find(begin(entry.local_variables), end(entry.local_variables), var.first) == end(entry.local_variables))
|
|
continue;
|
|
|
|
DominatorBuilder builder(cfg);
|
|
auto &blocks = var.second;
|
|
auto &type = expression_type(var.first);
|
|
|
|
// Figure out which block is dominating all accesses of those variables.
|
|
for (auto &block : blocks)
|
|
{
|
|
// If we're accessing a variable inside a continue block, this variable might be a loop variable.
|
|
// We can only use loop variables with scalars, as we cannot track static expressions for vectors.
|
|
if (is_continue(block))
|
|
{
|
|
// Potentially awkward case to check for.
|
|
// We might have a variable inside a loop, which is touched by the continue block,
|
|
// but is not actually a loop variable.
|
|
// The continue block is dominated by the inner part of the loop, which does not make sense in high-level
|
|
// language output because it will be declared before the body,
|
|
// so we will have to lift the dominator up to the relevant loop header instead.
|
|
builder.add_block(ir.continue_block_to_loop_header[block]);
|
|
|
|
// Arrays or structs cannot be loop variables.
|
|
if (type.vecsize == 1 && type.columns == 1 && type.basetype != SPIRType::Struct && type.array.empty())
|
|
{
|
|
// The variable is used in multiple continue blocks, this is not a loop
|
|
// candidate, signal that by setting block to -1u.
|
|
auto &potential = potential_loop_variables[var.first];
|
|
|
|
if (potential == 0)
|
|
potential = block;
|
|
else
|
|
potential = ~(0u);
|
|
}
|
|
}
|
|
builder.add_block(block);
|
|
}
|
|
|
|
builder.lift_continue_block_dominator();
|
|
|
|
// Add it to a per-block list of variables.
|
|
uint32_t dominating_block = builder.get_dominator();
|
|
|
|
// If all blocks here are dead code, this will be 0, so the variable in question
|
|
// will be completely eliminated.
|
|
if (dominating_block)
|
|
{
|
|
auto &block = get<SPIRBlock>(dominating_block);
|
|
block.dominated_variables.push_back(var.first);
|
|
get<SPIRVariable>(var.first).dominator = dominating_block;
|
|
}
|
|
}
|
|
|
|
for (auto &var : handler.accessed_temporaries_to_block)
|
|
{
|
|
auto itr = handler.result_id_to_type.find(var.first);
|
|
|
|
if (itr == end(handler.result_id_to_type))
|
|
{
|
|
// We found a false positive ID being used, ignore.
|
|
// This should probably be an assert.
|
|
continue;
|
|
}
|
|
|
|
DominatorBuilder builder(cfg);
|
|
bool force_temporary = false;
|
|
|
|
// Figure out which block is dominating all accesses of those temporaries.
|
|
auto &blocks = var.second;
|
|
for (auto &block : blocks)
|
|
{
|
|
builder.add_block(block);
|
|
|
|
// If a temporary is used in more than one block, we might have to lift continue block
|
|
// access up to loop header like we did for variables.
|
|
if (blocks.size() != 1 && is_continue(block))
|
|
builder.add_block(ir.continue_block_to_loop_header[block]);
|
|
else if (blocks.size() != 1 && is_single_block_loop(block))
|
|
{
|
|
// Awkward case, because the loop header is also the continue block.
|
|
force_temporary = true;
|
|
}
|
|
}
|
|
|
|
uint32_t dominating_block = builder.get_dominator();
|
|
if (dominating_block)
|
|
{
|
|
// If we touch a variable in the dominating block, this is the expected setup.
|
|
// SPIR-V normally mandates this, but we have extra cases for temporary use inside loops.
|
|
bool first_use_is_dominator = blocks.count(dominating_block) != 0;
|
|
|
|
if (!first_use_is_dominator || force_temporary)
|
|
{
|
|
// This should be very rare, but if we try to declare a temporary inside a loop,
|
|
// and that temporary is used outside the loop as well (spirv-opt inliner likes this)
|
|
// we should actually emit the temporary outside the loop.
|
|
hoisted_temporaries.insert(var.first);
|
|
forced_temporaries.insert(var.first);
|
|
|
|
auto &block_temporaries = get<SPIRBlock>(dominating_block).declare_temporary;
|
|
block_temporaries.emplace_back(handler.result_id_to_type[var.first], var.first);
|
|
}
|
|
else if (blocks.size() > 1)
|
|
{
|
|
// Keep track of the temporary as we might have to declare this temporary.
|
|
// This can happen if the loop header dominates a temporary, but we have a complex fallback loop.
|
|
// In this case, the header is actually inside the for (;;) {} block, and we have problems.
|
|
// What we need to do is hoist the temporaries outside the for (;;) {} block in case the header block
|
|
// declares the temporary.
|
|
auto &block_temporaries = get<SPIRBlock>(dominating_block).potential_declare_temporary;
|
|
block_temporaries.emplace_back(handler.result_id_to_type[var.first], var.first);
|
|
}
|
|
}
|
|
}
|
|
|
|
unordered_set<uint32_t> seen_blocks;
|
|
|
|
// Now, try to analyze whether or not these variables are actually loop variables.
|
|
for (auto &loop_variable : potential_loop_variables)
|
|
{
|
|
auto &var = get<SPIRVariable>(loop_variable.first);
|
|
auto dominator = var.dominator;
|
|
auto block = loop_variable.second;
|
|
|
|
// The variable was accessed in multiple continue blocks, ignore.
|
|
if (block == ~(0u) || block == 0)
|
|
continue;
|
|
|
|
// Dead code.
|
|
if (dominator == 0)
|
|
continue;
|
|
|
|
uint32_t header = 0;
|
|
|
|
// Find the loop header for this block if we are a continue block.
|
|
{
|
|
auto itr = ir.continue_block_to_loop_header.find(block);
|
|
if (itr != end(ir.continue_block_to_loop_header))
|
|
{
|
|
header = itr->second;
|
|
}
|
|
else if (get<SPIRBlock>(block).continue_block == block)
|
|
{
|
|
// Also check for self-referential continue block.
|
|
header = block;
|
|
}
|
|
}
|
|
|
|
assert(header);
|
|
auto &header_block = get<SPIRBlock>(header);
|
|
auto &blocks = handler.accessed_variables_to_block[loop_variable.first];
|
|
|
|
// If a loop variable is not used before the loop, it's probably not a loop variable.
|
|
bool has_accessed_variable = blocks.count(header) != 0;
|
|
|
|
// Now, there are two conditions we need to meet for the variable to be a loop variable.
|
|
// 1. The dominating block must have a branch-free path to the loop header,
|
|
// this way we statically know which expression should be part of the loop variable initializer.
|
|
|
|
// Walk from the dominator, if there is one straight edge connecting
|
|
// dominator and loop header, we statically know the loop initializer.
|
|
bool static_loop_init = true;
|
|
while (dominator != header)
|
|
{
|
|
if (blocks.count(dominator) != 0)
|
|
has_accessed_variable = true;
|
|
|
|
auto &succ = cfg.get_succeeding_edges(dominator);
|
|
if (succ.size() != 1)
|
|
{
|
|
static_loop_init = false;
|
|
break;
|
|
}
|
|
|
|
auto &pred = cfg.get_preceding_edges(succ.front());
|
|
if (pred.size() != 1 || pred.front() != dominator)
|
|
{
|
|
static_loop_init = false;
|
|
break;
|
|
}
|
|
|
|
dominator = succ.front();
|
|
}
|
|
|
|
if (!static_loop_init || !has_accessed_variable)
|
|
continue;
|
|
|
|
// The second condition we need to meet is that no access after the loop
|
|
// merge can occur. Walk the CFG to see if we find anything.
|
|
|
|
seen_blocks.clear();
|
|
cfg.walk_from(seen_blocks, header_block.merge_block, [&](uint32_t walk_block) {
|
|
// We found a block which accesses the variable outside the loop.
|
|
if (blocks.find(walk_block) != end(blocks))
|
|
static_loop_init = false;
|
|
});
|
|
|
|
if (!static_loop_init)
|
|
continue;
|
|
|
|
// We have a loop variable.
|
|
header_block.loop_variables.push_back(loop_variable.first);
|
|
// Need to sort here as variables come from an unordered container, and pushing stuff in wrong order
|
|
// will break reproducability in regression runs.
|
|
sort(begin(header_block.loop_variables), end(header_block.loop_variables));
|
|
get<SPIRVariable>(loop_variable.first).loop_variable = true;
|
|
}
|
|
}
|
|
|
|
Bitset Compiler::get_buffer_block_flags(uint32_t id) const
|
|
{
|
|
return ir.get_buffer_block_flags(get<SPIRVariable>(id));
|
|
}
|
|
|
|
bool Compiler::get_common_basic_type(const SPIRType &type, SPIRType::BaseType &base_type)
|
|
{
|
|
if (type.basetype == SPIRType::Struct)
|
|
{
|
|
base_type = SPIRType::Unknown;
|
|
for (auto &member_type : type.member_types)
|
|
{
|
|
SPIRType::BaseType member_base;
|
|
if (!get_common_basic_type(get<SPIRType>(member_type), member_base))
|
|
return false;
|
|
|
|
if (base_type == SPIRType::Unknown)
|
|
base_type = member_base;
|
|
else if (base_type != member_base)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
base_type = type.basetype;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
void Compiler::ActiveBuiltinHandler::handle_builtin(const SPIRType &type, BuiltIn builtin,
|
|
const Bitset &decoration_flags)
|
|
{
|
|
// If used, we will need to explicitly declare a new array size for these builtins.
|
|
|
|
if (builtin == BuiltInClipDistance)
|
|
{
|
|
if (!type.array_size_literal[0])
|
|
SPIRV_CROSS_THROW("Array size for ClipDistance must be a literal.");
|
|
uint32_t array_size = type.array[0];
|
|
if (array_size == 0)
|
|
SPIRV_CROSS_THROW("Array size for ClipDistance must not be unsized.");
|
|
compiler.clip_distance_count = array_size;
|
|
}
|
|
else if (builtin == BuiltInCullDistance)
|
|
{
|
|
if (!type.array_size_literal[0])
|
|
SPIRV_CROSS_THROW("Array size for CullDistance must be a literal.");
|
|
uint32_t array_size = type.array[0];
|
|
if (array_size == 0)
|
|
SPIRV_CROSS_THROW("Array size for CullDistance must not be unsized.");
|
|
compiler.cull_distance_count = array_size;
|
|
}
|
|
else if (builtin == BuiltInPosition)
|
|
{
|
|
if (decoration_flags.get(DecorationInvariant))
|
|
compiler.position_invariant = true;
|
|
}
|
|
}
|
|
|
|
bool Compiler::ActiveBuiltinHandler::handle(spv::Op opcode, const uint32_t *args, uint32_t length)
|
|
{
|
|
const auto add_if_builtin = [&](uint32_t id) {
|
|
// Only handles variables here.
|
|
// Builtins which are part of a block are handled in AccessChain.
|
|
auto *var = compiler.maybe_get<SPIRVariable>(id);
|
|
auto &decorations = compiler.ir.meta[id].decoration;
|
|
if (var && decorations.builtin)
|
|
{
|
|
auto &type = compiler.get<SPIRType>(var->basetype);
|
|
auto &flags =
|
|
type.storage == StorageClassInput ? compiler.active_input_builtins : compiler.active_output_builtins;
|
|
flags.set(decorations.builtin_type);
|
|
handle_builtin(type, decorations.builtin_type, decorations.decoration_flags);
|
|
}
|
|
};
|
|
|
|
switch (opcode)
|
|
{
|
|
case OpStore:
|
|
if (length < 1)
|
|
return false;
|
|
|
|
add_if_builtin(args[0]);
|
|
break;
|
|
|
|
case OpCopyMemory:
|
|
if (length < 2)
|
|
return false;
|
|
|
|
add_if_builtin(args[0]);
|
|
add_if_builtin(args[1]);
|
|
break;
|
|
|
|
case OpCopyObject:
|
|
case OpLoad:
|
|
if (length < 3)
|
|
return false;
|
|
|
|
add_if_builtin(args[2]);
|
|
break;
|
|
|
|
case OpSelect:
|
|
if (length < 5)
|
|
return false;
|
|
|
|
add_if_builtin(args[3]);
|
|
add_if_builtin(args[4]);
|
|
break;
|
|
|
|
case OpPhi:
|
|
{
|
|
if (length < 2)
|
|
return false;
|
|
|
|
uint32_t count = length - 2;
|
|
args += 2;
|
|
for (uint32_t i = 0; i < count; i += 2)
|
|
add_if_builtin(args[i]);
|
|
break;
|
|
}
|
|
|
|
case OpFunctionCall:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
uint32_t count = length - 3;
|
|
args += 3;
|
|
for (uint32_t i = 0; i < count; i++)
|
|
add_if_builtin(args[i]);
|
|
break;
|
|
}
|
|
|
|
case OpAccessChain:
|
|
case OpInBoundsAccessChain:
|
|
case OpPtrAccessChain:
|
|
{
|
|
if (length < 4)
|
|
return false;
|
|
|
|
// Only consider global variables, cannot consider variables in functions yet, or other
|
|
// access chains as they have not been created yet.
|
|
auto *var = compiler.maybe_get<SPIRVariable>(args[2]);
|
|
if (!var)
|
|
break;
|
|
|
|
// Required if we access chain into builtins like gl_GlobalInvocationID.
|
|
add_if_builtin(args[2]);
|
|
|
|
// Start traversing type hierarchy at the proper non-pointer types.
|
|
auto *type = &compiler.get_variable_data_type(*var);
|
|
|
|
auto &flags =
|
|
type->storage == StorageClassInput ? compiler.active_input_builtins : compiler.active_output_builtins;
|
|
|
|
uint32_t count = length - 3;
|
|
args += 3;
|
|
for (uint32_t i = 0; i < count; i++)
|
|
{
|
|
// Pointers
|
|
if (opcode == OpPtrAccessChain && i == 0)
|
|
{
|
|
type = &compiler.get<SPIRType>(type->parent_type);
|
|
continue;
|
|
}
|
|
|
|
// Arrays
|
|
if (!type->array.empty())
|
|
{
|
|
type = &compiler.get<SPIRType>(type->parent_type);
|
|
}
|
|
// Structs
|
|
else if (type->basetype == SPIRType::Struct)
|
|
{
|
|
uint32_t index = compiler.get<SPIRConstant>(args[i]).scalar();
|
|
|
|
if (index < uint32_t(compiler.ir.meta[type->self].members.size()))
|
|
{
|
|
auto &decorations = compiler.ir.meta[type->self].members[index];
|
|
if (decorations.builtin)
|
|
{
|
|
flags.set(decorations.builtin_type);
|
|
handle_builtin(compiler.get<SPIRType>(type->member_types[index]), decorations.builtin_type,
|
|
decorations.decoration_flags);
|
|
}
|
|
}
|
|
|
|
type = &compiler.get<SPIRType>(type->member_types[index]);
|
|
}
|
|
else
|
|
{
|
|
// No point in traversing further. We won't find any extra builtins.
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void Compiler::update_active_builtins()
|
|
{
|
|
active_input_builtins.reset();
|
|
active_output_builtins.reset();
|
|
cull_distance_count = 0;
|
|
clip_distance_count = 0;
|
|
ActiveBuiltinHandler handler(*this);
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), handler);
|
|
}
|
|
|
|
// Returns whether this shader uses a builtin of the storage class
|
|
bool Compiler::has_active_builtin(BuiltIn builtin, StorageClass storage)
|
|
{
|
|
const Bitset *flags;
|
|
switch (storage)
|
|
{
|
|
case StorageClassInput:
|
|
flags = &active_input_builtins;
|
|
break;
|
|
case StorageClassOutput:
|
|
flags = &active_output_builtins;
|
|
break;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
return flags->get(builtin);
|
|
}
|
|
|
|
void Compiler::analyze_image_and_sampler_usage()
|
|
{
|
|
CombinedImageSamplerDrefHandler dref_handler(*this);
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), dref_handler);
|
|
|
|
CombinedImageSamplerUsageHandler handler(*this, dref_handler.dref_combined_samplers);
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), handler);
|
|
comparison_ids = move(handler.comparison_ids);
|
|
need_subpass_input = handler.need_subpass_input;
|
|
|
|
// Forward information from separate images and samplers into combined image samplers.
|
|
for (auto &combined : combined_image_samplers)
|
|
if (comparison_ids.count(combined.sampler_id))
|
|
comparison_ids.insert(combined.combined_id);
|
|
}
|
|
|
|
bool Compiler::CombinedImageSamplerDrefHandler::handle(spv::Op opcode, const uint32_t *args, uint32_t)
|
|
{
|
|
// Mark all sampled images which are used with Dref.
|
|
switch (opcode)
|
|
{
|
|
case OpImageSampleDrefExplicitLod:
|
|
case OpImageSampleDrefImplicitLod:
|
|
case OpImageSampleProjDrefExplicitLod:
|
|
case OpImageSampleProjDrefImplicitLod:
|
|
case OpImageSparseSampleProjDrefImplicitLod:
|
|
case OpImageSparseSampleDrefImplicitLod:
|
|
case OpImageSparseSampleProjDrefExplicitLod:
|
|
case OpImageSparseSampleDrefExplicitLod:
|
|
case OpImageDrefGather:
|
|
case OpImageSparseDrefGather:
|
|
dref_combined_samplers.insert(args[2]);
|
|
return true;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void Compiler::build_function_control_flow_graphs_and_analyze()
|
|
{
|
|
CFGBuilder handler(*this);
|
|
handler.function_cfgs[ir.default_entry_point].reset(new CFG(*this, get<SPIRFunction>(ir.default_entry_point)));
|
|
traverse_all_reachable_opcodes(get<SPIRFunction>(ir.default_entry_point), handler);
|
|
function_cfgs = move(handler.function_cfgs);
|
|
|
|
for (auto &f : function_cfgs)
|
|
{
|
|
auto &func = get<SPIRFunction>(f.first);
|
|
AnalyzeVariableScopeAccessHandler scope_handler(*this, func);
|
|
analyze_variable_scope(func, scope_handler);
|
|
find_function_local_luts(func, scope_handler);
|
|
|
|
// Check if we can actually use the loop variables we found in analyze_variable_scope.
|
|
// To use multiple initializers, we need the same type and qualifiers.
|
|
for (auto block : func.blocks)
|
|
{
|
|
auto &b = get<SPIRBlock>(block);
|
|
if (b.loop_variables.size() < 2)
|
|
continue;
|
|
|
|
auto &flags = get_decoration_bitset(b.loop_variables.front());
|
|
uint32_t type = get<SPIRVariable>(b.loop_variables.front()).basetype;
|
|
bool invalid_initializers = false;
|
|
for (auto loop_variable : b.loop_variables)
|
|
{
|
|
if (flags != get_decoration_bitset(loop_variable) ||
|
|
type != get<SPIRVariable>(b.loop_variables.front()).basetype)
|
|
{
|
|
invalid_initializers = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (invalid_initializers)
|
|
{
|
|
for (auto loop_variable : b.loop_variables)
|
|
get<SPIRVariable>(loop_variable).loop_variable = false;
|
|
b.loop_variables.clear();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
Compiler::CFGBuilder::CFGBuilder(spirv_cross::Compiler &compiler_)
|
|
: compiler(compiler_)
|
|
{
|
|
}
|
|
|
|
bool Compiler::CFGBuilder::handle(spv::Op, const uint32_t *, uint32_t)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::CFGBuilder::follow_function_call(const SPIRFunction &func)
|
|
{
|
|
if (function_cfgs.find(func.self) == end(function_cfgs))
|
|
{
|
|
function_cfgs[func.self].reset(new CFG(compiler, func));
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
bool Compiler::CombinedImageSamplerUsageHandler::begin_function_scope(const uint32_t *args, uint32_t length)
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
|
|
auto &func = compiler.get<SPIRFunction>(args[2]);
|
|
const auto *arg = &args[3];
|
|
length -= 3;
|
|
|
|
for (uint32_t i = 0; i < length; i++)
|
|
{
|
|
auto &argument = func.arguments[i];
|
|
dependency_hierarchy[argument.id].insert(arg[i]);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void Compiler::CombinedImageSamplerUsageHandler::add_hierarchy_to_comparison_ids(uint32_t id)
|
|
{
|
|
// Traverse the variable dependency hierarchy and tag everything in its path with comparison ids.
|
|
comparison_ids.insert(id);
|
|
for (auto &dep_id : dependency_hierarchy[id])
|
|
add_hierarchy_to_comparison_ids(dep_id);
|
|
}
|
|
|
|
bool Compiler::CombinedImageSamplerUsageHandler::handle(Op opcode, const uint32_t *args, uint32_t length)
|
|
{
|
|
switch (opcode)
|
|
{
|
|
case OpAccessChain:
|
|
case OpInBoundsAccessChain:
|
|
case OpPtrAccessChain:
|
|
case OpLoad:
|
|
{
|
|
if (length < 3)
|
|
return false;
|
|
dependency_hierarchy[args[1]].insert(args[2]);
|
|
|
|
// Ideally defer this to OpImageRead, but then we'd need to track loaded IDs.
|
|
// If we load an image, we're going to use it and there is little harm in declaring an unused gl_FragCoord.
|
|
auto &type = compiler.get<SPIRType>(args[0]);
|
|
if (type.image.dim == DimSubpassData)
|
|
need_subpass_input = true;
|
|
|
|
// If we load a SampledImage and it will be used with Dref, propagate the state up.
|
|
if (dref_combined_samplers.count(args[1]) != 0)
|
|
add_hierarchy_to_comparison_ids(args[1]);
|
|
break;
|
|
}
|
|
|
|
case OpSampledImage:
|
|
{
|
|
if (length < 4)
|
|
return false;
|
|
|
|
uint32_t result_type = args[0];
|
|
uint32_t result_id = args[1];
|
|
auto &type = compiler.get<SPIRType>(result_type);
|
|
if (type.image.depth || dref_combined_samplers.count(result_id) != 0)
|
|
{
|
|
// This image must be a depth image.
|
|
uint32_t image = args[2];
|
|
add_hierarchy_to_comparison_ids(image);
|
|
|
|
// This sampler must be a SamplerComparisonState, and not a regular SamplerState.
|
|
uint32_t sampler = args[3];
|
|
add_hierarchy_to_comparison_ids(sampler);
|
|
|
|
// Mark the OpSampledImage itself as being comparison state.
|
|
comparison_ids.insert(result_id);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::buffer_is_hlsl_counter_buffer(uint32_t id) const
|
|
{
|
|
return ir.meta.at(id).hlsl_is_magic_counter_buffer;
|
|
}
|
|
|
|
bool Compiler::buffer_get_hlsl_counter_buffer(uint32_t id, uint32_t &counter_id) const
|
|
{
|
|
// First, check for the proper decoration.
|
|
if (ir.meta[id].hlsl_magic_counter_buffer != 0)
|
|
{
|
|
counter_id = ir.meta[id].hlsl_magic_counter_buffer;
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
void Compiler::make_constant_null(uint32_t id, uint32_t type)
|
|
{
|
|
auto &constant_type = get<SPIRType>(type);
|
|
|
|
if (constant_type.pointer)
|
|
{
|
|
auto &constant = set<SPIRConstant>(id, type);
|
|
constant.make_null(constant_type);
|
|
}
|
|
else if (!constant_type.array.empty())
|
|
{
|
|
assert(constant_type.parent_type);
|
|
uint32_t parent_id = ir.increase_bound_by(1);
|
|
make_constant_null(parent_id, constant_type.parent_type);
|
|
|
|
if (!constant_type.array_size_literal.back())
|
|
SPIRV_CROSS_THROW("Array size of OpConstantNull must be a literal.");
|
|
|
|
vector<uint32_t> elements(constant_type.array.back());
|
|
for (uint32_t i = 0; i < constant_type.array.back(); i++)
|
|
elements[i] = parent_id;
|
|
set<SPIRConstant>(id, type, elements.data(), uint32_t(elements.size()), false);
|
|
}
|
|
else if (!constant_type.member_types.empty())
|
|
{
|
|
uint32_t member_ids = ir.increase_bound_by(uint32_t(constant_type.member_types.size()));
|
|
vector<uint32_t> elements(constant_type.member_types.size());
|
|
for (uint32_t i = 0; i < constant_type.member_types.size(); i++)
|
|
{
|
|
make_constant_null(member_ids + i, constant_type.member_types[i]);
|
|
elements[i] = member_ids + i;
|
|
}
|
|
set<SPIRConstant>(id, type, elements.data(), uint32_t(elements.size()), false);
|
|
}
|
|
else
|
|
{
|
|
auto &constant = set<SPIRConstant>(id, type);
|
|
constant.make_null(constant_type);
|
|
}
|
|
}
|
|
|
|
const std::vector<spv::Capability> &Compiler::get_declared_capabilities() const
|
|
{
|
|
return ir.declared_capabilities;
|
|
}
|
|
|
|
const std::vector<std::string> &Compiler::get_declared_extensions() const
|
|
{
|
|
return ir.declared_extensions;
|
|
}
|
|
|
|
std::string Compiler::get_remapped_declared_block_name(uint32_t id) const
|
|
{
|
|
auto itr = declared_block_names.find(id);
|
|
if (itr != end(declared_block_names))
|
|
return itr->second;
|
|
else
|
|
{
|
|
auto &var = get<SPIRVariable>(id);
|
|
auto &type = get<SPIRType>(var.basetype);
|
|
auto &block_name = ir.meta[type.self].decoration.alias;
|
|
return block_name.empty() ? get_block_fallback_name(id) : block_name;
|
|
}
|
|
}
|
|
|
|
bool Compiler::instruction_to_result_type(uint32_t &result_type, uint32_t &result_id, spv::Op op, const uint32_t *args,
|
|
uint32_t length)
|
|
{
|
|
// Most instructions follow the pattern of <result-type> <result-id> <arguments>.
|
|
// There are some exceptions.
|
|
switch (op)
|
|
{
|
|
case OpStore:
|
|
case OpCopyMemory:
|
|
case OpCopyMemorySized:
|
|
case OpImageWrite:
|
|
case OpAtomicStore:
|
|
case OpAtomicFlagClear:
|
|
case OpEmitStreamVertex:
|
|
case OpEndStreamPrimitive:
|
|
case OpControlBarrier:
|
|
case OpMemoryBarrier:
|
|
case OpGroupWaitEvents:
|
|
case OpRetainEvent:
|
|
case OpReleaseEvent:
|
|
case OpSetUserEventStatus:
|
|
case OpCaptureEventProfilingInfo:
|
|
case OpCommitReadPipe:
|
|
case OpCommitWritePipe:
|
|
case OpGroupCommitReadPipe:
|
|
case OpGroupCommitWritePipe:
|
|
return false;
|
|
|
|
default:
|
|
if (length > 1)
|
|
{
|
|
result_type = args[0];
|
|
result_id = args[1];
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
}
|
|
|
|
Bitset Compiler::combined_decoration_for_member(const SPIRType &type, uint32_t index) const
|
|
{
|
|
Bitset flags;
|
|
auto &memb = ir.meta[type.self].members;
|
|
if (index >= memb.size())
|
|
return flags;
|
|
auto &dec = memb[index];
|
|
|
|
// If our type is a struct, traverse all the members as well recursively.
|
|
flags.merge_or(dec.decoration_flags);
|
|
for (uint32_t i = 0; i < type.member_types.size(); i++)
|
|
flags.merge_or(combined_decoration_for_member(get<SPIRType>(type.member_types[i]), i));
|
|
|
|
return flags;
|
|
}
|
|
|
|
bool Compiler::is_desktop_only_format(spv::ImageFormat format)
|
|
{
|
|
switch (format)
|
|
{
|
|
// Desktop-only formats
|
|
case ImageFormatR11fG11fB10f:
|
|
case ImageFormatR16f:
|
|
case ImageFormatRgb10A2:
|
|
case ImageFormatR8:
|
|
case ImageFormatRg8:
|
|
case ImageFormatR16:
|
|
case ImageFormatRg16:
|
|
case ImageFormatRgba16:
|
|
case ImageFormatR16Snorm:
|
|
case ImageFormatRg16Snorm:
|
|
case ImageFormatRgba16Snorm:
|
|
case ImageFormatR8Snorm:
|
|
case ImageFormatRg8Snorm:
|
|
case ImageFormatR8ui:
|
|
case ImageFormatRg8ui:
|
|
case ImageFormatR16ui:
|
|
case ImageFormatRgb10a2ui:
|
|
case ImageFormatR8i:
|
|
case ImageFormatRg8i:
|
|
case ImageFormatR16i:
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool Compiler::image_is_comparison(const spirv_cross::SPIRType &type, uint32_t id) const
|
|
{
|
|
return type.image.depth || (comparison_ids.count(id) != 0);
|
|
}
|