mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-29 03:01:08 +00:00
c8c86a0d36
Includes code to deal correctly with OpFunctionParameter. This is needed by opaque propagation which may not exhaustively inline entry point functions. Adds ProcessEntryPointCallTree: a method to do work on the functions in the entry point call trees in a deterministic order.
357 lines
12 KiB
C++
357 lines
12 KiB
C++
// Copyright (c) 2017 The Khronos Group Inc.
|
|
// Copyright (c) 2017 Valve Corporation
|
|
// Copyright (c) 2017 LunarG Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "local_access_chain_convert_pass.h"
|
|
|
|
#include "iterator.h"
|
|
|
|
namespace spvtools {
|
|
namespace opt {
|
|
|
|
namespace {
|
|
|
|
const uint32_t kStoreValIdInIdx = 1;
|
|
const uint32_t kAccessChainPtrIdInIdx = 0;
|
|
const uint32_t kTypePointerTypeIdInIdx = 1;
|
|
const uint32_t kConstantValueInIdx = 0;
|
|
const uint32_t kTypeIntWidthInIdx = 0;
|
|
|
|
} // anonymous namespace
|
|
|
|
void LocalAccessChainConvertPass::DeleteIfUseless(ir::Instruction* inst) {
|
|
const uint32_t resId = inst->result_id();
|
|
assert(resId != 0);
|
|
if (HasOnlyNamesAndDecorates(resId)) {
|
|
KillNamesAndDecorates(resId);
|
|
def_use_mgr_->KillInst(inst);
|
|
}
|
|
}
|
|
|
|
uint32_t LocalAccessChainConvertPass::GetPointeeTypeId(
|
|
const ir::Instruction* ptrInst) const {
|
|
const uint32_t ptrTypeId = ptrInst->type_id();
|
|
const ir::Instruction* ptrTypeInst = def_use_mgr_->GetDef(ptrTypeId);
|
|
return ptrTypeInst->GetSingleWordInOperand(kTypePointerTypeIdInIdx);
|
|
}
|
|
|
|
void LocalAccessChainConvertPass::BuildAndAppendInst(
|
|
SpvOp opcode,
|
|
uint32_t typeId,
|
|
uint32_t resultId,
|
|
const std::vector<ir::Operand>& in_opnds,
|
|
std::vector<std::unique_ptr<ir::Instruction>>* newInsts) {
|
|
std::unique_ptr<ir::Instruction> newInst(new ir::Instruction(
|
|
opcode, typeId, resultId, in_opnds));
|
|
def_use_mgr_->AnalyzeInstDefUse(&*newInst);
|
|
newInsts->emplace_back(std::move(newInst));
|
|
}
|
|
|
|
uint32_t LocalAccessChainConvertPass::BuildAndAppendVarLoad(
|
|
const ir::Instruction* ptrInst,
|
|
uint32_t* varId,
|
|
uint32_t* varPteTypeId,
|
|
std::vector<std::unique_ptr<ir::Instruction>>* newInsts) {
|
|
const uint32_t ldResultId = TakeNextId();
|
|
*varId = ptrInst->GetSingleWordInOperand(kAccessChainPtrIdInIdx);
|
|
const ir::Instruction* varInst = def_use_mgr_->GetDef(*varId);
|
|
assert(varInst->opcode() == SpvOpVariable);
|
|
*varPteTypeId = GetPointeeTypeId(varInst);
|
|
BuildAndAppendInst(SpvOpLoad, *varPteTypeId, ldResultId,
|
|
{{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {*varId}}}, newInsts);
|
|
return ldResultId;
|
|
}
|
|
|
|
void LocalAccessChainConvertPass::AppendConstantOperands(
|
|
const ir::Instruction* ptrInst,
|
|
std::vector<ir::Operand>* in_opnds) {
|
|
uint32_t iidIdx = 0;
|
|
ptrInst->ForEachInId([&iidIdx, &in_opnds, this](const uint32_t *iid) {
|
|
if (iidIdx > 0) {
|
|
const ir::Instruction* cInst = def_use_mgr_->GetDef(*iid);
|
|
uint32_t val = cInst->GetSingleWordInOperand(kConstantValueInIdx);
|
|
in_opnds->push_back(
|
|
{spv_operand_type_t::SPV_OPERAND_TYPE_LITERAL_INTEGER, {val}});
|
|
}
|
|
++iidIdx;
|
|
});
|
|
}
|
|
|
|
uint32_t LocalAccessChainConvertPass::GenAccessChainLoadReplacement(
|
|
const ir::Instruction* ptrInst,
|
|
std::vector<std::unique_ptr<ir::Instruction>>* newInsts) {
|
|
|
|
// Build and append load of variable in ptrInst
|
|
uint32_t varId;
|
|
uint32_t varPteTypeId;
|
|
const uint32_t ldResultId = BuildAndAppendVarLoad(ptrInst, &varId,
|
|
&varPteTypeId, newInsts);
|
|
|
|
// Build and append Extract
|
|
const uint32_t extResultId = TakeNextId();
|
|
const uint32_t ptrPteTypeId = GetPointeeTypeId(ptrInst);
|
|
std::vector<ir::Operand> ext_in_opnds =
|
|
{{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {ldResultId}}};
|
|
AppendConstantOperands(ptrInst, &ext_in_opnds);
|
|
BuildAndAppendInst(SpvOpCompositeExtract, ptrPteTypeId, extResultId,
|
|
ext_in_opnds, newInsts);
|
|
return extResultId;
|
|
}
|
|
|
|
void LocalAccessChainConvertPass::GenAccessChainStoreReplacement(
|
|
const ir::Instruction* ptrInst,
|
|
uint32_t valId,
|
|
std::vector<std::unique_ptr<ir::Instruction>>* newInsts) {
|
|
|
|
// Build and append load of variable in ptrInst
|
|
uint32_t varId;
|
|
uint32_t varPteTypeId;
|
|
const uint32_t ldResultId = BuildAndAppendVarLoad(ptrInst, &varId,
|
|
&varPteTypeId, newInsts);
|
|
|
|
// Build and append Insert
|
|
const uint32_t insResultId = TakeNextId();
|
|
std::vector<ir::Operand> ins_in_opnds =
|
|
{{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {valId}},
|
|
{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {ldResultId}}};
|
|
AppendConstantOperands(ptrInst, &ins_in_opnds);
|
|
BuildAndAppendInst(
|
|
SpvOpCompositeInsert, varPteTypeId, insResultId, ins_in_opnds, newInsts);
|
|
|
|
// Build and append Store
|
|
BuildAndAppendInst(SpvOpStore, 0, 0,
|
|
{{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {varId}},
|
|
{spv_operand_type_t::SPV_OPERAND_TYPE_ID, {insResultId}}},
|
|
newInsts);
|
|
}
|
|
|
|
bool LocalAccessChainConvertPass::IsConstantIndexAccessChain(
|
|
const ir::Instruction* acp) const {
|
|
uint32_t inIdx = 0;
|
|
uint32_t nonConstCnt = 0;
|
|
acp->ForEachInId([&inIdx, &nonConstCnt, this](const uint32_t* tid) {
|
|
if (inIdx > 0) {
|
|
ir::Instruction* opInst = def_use_mgr_->GetDef(*tid);
|
|
if (opInst->opcode() != SpvOpConstant) ++nonConstCnt;
|
|
}
|
|
++inIdx;
|
|
});
|
|
return nonConstCnt == 0;
|
|
}
|
|
|
|
bool LocalAccessChainConvertPass::HasOnlySupportedRefs(uint32_t ptrId) {
|
|
if (supported_ref_ptrs_.find(ptrId) != supported_ref_ptrs_.end())
|
|
return true;
|
|
analysis::UseList* uses = def_use_mgr_->GetUses(ptrId);
|
|
assert(uses != nullptr);
|
|
for (auto u : *uses) {
|
|
SpvOp op = u.inst->opcode();
|
|
if (IsNonPtrAccessChain(op) || op == SpvOpCopyObject) {
|
|
if (!HasOnlySupportedRefs(u.inst->result_id())) return false;
|
|
} else if (op != SpvOpStore && op != SpvOpLoad && op != SpvOpName &&
|
|
!IsNonTypeDecorate(op))
|
|
return false;
|
|
}
|
|
supported_ref_ptrs_.insert(ptrId);
|
|
return true;
|
|
}
|
|
|
|
void LocalAccessChainConvertPass::FindTargetVars(ir::Function* func) {
|
|
for (auto bi = func->begin(); bi != func->end(); ++bi) {
|
|
for (auto ii = bi->begin(); ii != bi->end(); ++ii) {
|
|
switch (ii->opcode()) {
|
|
case SpvOpStore:
|
|
case SpvOpLoad: {
|
|
uint32_t varId;
|
|
ir::Instruction* ptrInst = GetPtr(&*ii, &varId);
|
|
if (!IsTargetVar(varId))
|
|
break;
|
|
const SpvOp op = ptrInst->opcode();
|
|
// Rule out variables with non-supported refs eg function calls
|
|
if (!HasOnlySupportedRefs(varId)) {
|
|
seen_non_target_vars_.insert(varId);
|
|
seen_target_vars_.erase(varId);
|
|
break;
|
|
}
|
|
// Rule out variables with nested access chains
|
|
// TODO(): Convert nested access chains
|
|
if (IsNonPtrAccessChain(op) &&
|
|
ptrInst->GetSingleWordInOperand(kAccessChainPtrIdInIdx) != varId) {
|
|
seen_non_target_vars_.insert(varId);
|
|
seen_target_vars_.erase(varId);
|
|
break;
|
|
}
|
|
// Rule out variables accessed with non-constant indices
|
|
if (!IsConstantIndexAccessChain(ptrInst)) {
|
|
seen_non_target_vars_.insert(varId);
|
|
seen_target_vars_.erase(varId);
|
|
break;
|
|
}
|
|
} break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool LocalAccessChainConvertPass::ConvertLocalAccessChains(ir::Function* func) {
|
|
FindTargetVars(func);
|
|
// Replace access chains of all targeted variables with equivalent
|
|
// extract and insert sequences
|
|
bool modified = false;
|
|
for (auto bi = func->begin(); bi != func->end(); ++bi) {
|
|
for (auto ii = bi->begin(); ii != bi->end(); ++ii) {
|
|
switch (ii->opcode()) {
|
|
case SpvOpLoad: {
|
|
uint32_t varId;
|
|
ir::Instruction* ptrInst = GetPtr(&*ii, &varId);
|
|
if (!IsNonPtrAccessChain(ptrInst->opcode()))
|
|
break;
|
|
if (!IsTargetVar(varId))
|
|
break;
|
|
std::vector<std::unique_ptr<ir::Instruction>> newInsts;
|
|
uint32_t replId =
|
|
GenAccessChainLoadReplacement(ptrInst, &newInsts);
|
|
ReplaceAndDeleteLoad(&*ii, replId);
|
|
++ii;
|
|
ii = ii.InsertBefore(&newInsts);
|
|
++ii;
|
|
modified = true;
|
|
} break;
|
|
case SpvOpStore: {
|
|
uint32_t varId;
|
|
ir::Instruction* ptrInst = GetPtr(&*ii, &varId);
|
|
if (!IsNonPtrAccessChain(ptrInst->opcode()))
|
|
break;
|
|
if (!IsTargetVar(varId))
|
|
break;
|
|
std::vector<std::unique_ptr<ir::Instruction>> newInsts;
|
|
uint32_t valId = ii->GetSingleWordInOperand(kStoreValIdInIdx);
|
|
GenAccessChainStoreReplacement(ptrInst, valId, &newInsts);
|
|
def_use_mgr_->KillInst(&*ii);
|
|
DeleteIfUseless(ptrInst);
|
|
++ii;
|
|
ii = ii.InsertBefore(&newInsts);
|
|
++ii;
|
|
++ii;
|
|
modified = true;
|
|
} break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return modified;
|
|
}
|
|
|
|
void LocalAccessChainConvertPass::Initialize(ir::Module* module) {
|
|
|
|
module_ = module;
|
|
|
|
// Initialize Target Variable Caches
|
|
seen_target_vars_.clear();
|
|
seen_non_target_vars_.clear();
|
|
|
|
// Initialize collections
|
|
supported_ref_ptrs_.clear();
|
|
|
|
def_use_mgr_.reset(new analysis::DefUseManager(consumer(), module_));
|
|
|
|
// Initialize next unused Id.
|
|
next_id_ = module->id_bound();
|
|
|
|
// Initialize extension whitelist
|
|
InitExtensions();
|
|
};
|
|
|
|
bool LocalAccessChainConvertPass::AllExtensionsSupported() const {
|
|
// If any extension not in whitelist, return false
|
|
for (auto& ei : module_->extensions()) {
|
|
const char* extName = reinterpret_cast<const char*>(
|
|
&ei.GetInOperand(0).words[0]);
|
|
if (extensions_whitelist_.find(extName) == extensions_whitelist_.end())
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
Pass::Status LocalAccessChainConvertPass::ProcessImpl() {
|
|
// If non-32-bit integer type in module, terminate processing
|
|
// TODO(): Handle non-32-bit integer constants in access chains
|
|
for (const ir::Instruction& inst : module_->types_values())
|
|
if (inst.opcode() == SpvOpTypeInt &&
|
|
inst.GetSingleWordInOperand(kTypeIntWidthInIdx) != 32)
|
|
return Status::SuccessWithoutChange;
|
|
// Do not process if module contains OpGroupDecorate. Additional
|
|
// support required in KillNamesAndDecorates().
|
|
// TODO(greg-lunarg): Add support for OpGroupDecorate
|
|
for (auto& ai : module_->annotations())
|
|
if (ai.opcode() == SpvOpGroupDecorate)
|
|
return Status::SuccessWithoutChange;
|
|
// Do not process if any disallowed extensions are enabled
|
|
if (!AllExtensionsSupported())
|
|
return Status::SuccessWithoutChange;
|
|
// Collect all named and decorated ids
|
|
FindNamedOrDecoratedIds();
|
|
// Process all entry point functions.
|
|
ProcessFunction pfn = [this](ir::Function* fp) {
|
|
return ConvertLocalAccessChains(fp);
|
|
};
|
|
bool modified = ProcessEntryPointCallTree(pfn, module_);
|
|
FinalizeNextId(module_);
|
|
return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
|
|
}
|
|
|
|
LocalAccessChainConvertPass::LocalAccessChainConvertPass() : next_id_(0) {}
|
|
|
|
Pass::Status LocalAccessChainConvertPass::Process(ir::Module* module) {
|
|
Initialize(module);
|
|
return ProcessImpl();
|
|
}
|
|
|
|
void LocalAccessChainConvertPass::InitExtensions() {
|
|
extensions_whitelist_.clear();
|
|
extensions_whitelist_.insert({
|
|
"SPV_AMD_shader_explicit_vertex_parameter",
|
|
"SPV_AMD_shader_trinary_minmax",
|
|
"SPV_AMD_gcn_shader",
|
|
"SPV_KHR_shader_ballot",
|
|
"SPV_AMD_shader_ballot",
|
|
"SPV_AMD_gpu_shader_half_float",
|
|
"SPV_KHR_shader_draw_parameters",
|
|
"SPV_KHR_subgroup_vote",
|
|
"SPV_KHR_16bit_storage",
|
|
"SPV_KHR_device_group",
|
|
"SPV_KHR_multiview",
|
|
"SPV_NVX_multiview_per_view_attributes",
|
|
"SPV_NV_viewport_array2",
|
|
"SPV_NV_stereo_view_rendering",
|
|
"SPV_NV_sample_mask_override_coverage",
|
|
"SPV_NV_geometry_shader_passthrough",
|
|
"SPV_AMD_texture_gather_bias_lod",
|
|
"SPV_KHR_storage_buffer_storage_class",
|
|
// SPV_KHR_variable_pointers
|
|
// Currently do not support extended pointer expressions
|
|
"SPV_AMD_gpu_shader_int16",
|
|
"SPV_KHR_post_depth_coverage",
|
|
"SPV_KHR_shader_atomic_counter_ops",
|
|
});
|
|
}
|
|
|
|
} // namespace opt
|
|
} // namespace spvtools
|
|
|