SPIRV-Tools/source/opt/ir_loader.cpp
alan-baker b4c4da3e76
Improve non-semantic instruction handling in the optimizer (#3693)
* No longer blindly add global non-semantic info instructions to global
  types and values
  * functions now have a list of non-semantic instructions that succeed
    them in the global scope
  * global non-semantic instructions go in global types and values if
    they appear before any function, otherwise they are attached to the
    immediate function predecessor in the module
* changed ADCE to use the function removal utility
* Modified EliminateFunction to have special handling for non-semantic
  instructions in the global scope
  * non-semantic instructions are moved to an earlier function (or full
    global set) if the function they are attached to is eliminated
  * Added IRContext::KillNonSemanticInfo to remove the tree of
    non-semantic instructions that use an instruction
  * this is used in function elimination
* There is still significant work in the optimizer to handle
  non-semantic instructions fully in the optimizer
2020-08-13 14:54:14 -04:00

302 lines
11 KiB
C++

// Copyright (c) 2016 Google 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 "source/opt/ir_loader.h"
#include <utility>
#include "DebugInfo.h"
#include "OpenCLDebugInfo100.h"
#include "source/ext_inst.h"
#include "source/opt/log.h"
#include "source/opt/reflect.h"
#include "source/util/make_unique.h"
static const uint32_t kExtInstSetIndex = 4;
static const uint32_t kLexicalScopeIndex = 5;
static const uint32_t kInlinedAtIndex = 6;
namespace spvtools {
namespace opt {
IrLoader::IrLoader(const MessageConsumer& consumer, Module* m)
: consumer_(consumer),
module_(m),
source_("<instruction>"),
inst_index_(0),
last_dbg_scope_(kNoDebugScope, kNoInlinedAt) {}
bool IrLoader::AddInstruction(const spv_parsed_instruction_t* inst) {
++inst_index_;
const auto opcode = static_cast<SpvOp>(inst->opcode);
if (IsDebugLineInst(opcode)) {
dbg_line_info_.push_back(
Instruction(module()->context(), *inst, last_dbg_scope_));
return true;
}
// If it is a DebugScope or DebugNoScope of debug extension, we do not
// create a new instruction, but simply keep the information in
// struct DebugScope.
if (opcode == SpvOpExtInst && spvExtInstIsDebugInfo(inst->ext_inst_type)) {
const uint32_t ext_inst_index = inst->words[kExtInstSetIndex];
if (inst->ext_inst_type == SPV_EXT_INST_TYPE_OPENCL_DEBUGINFO_100) {
const OpenCLDebugInfo100Instructions ext_inst_key =
OpenCLDebugInfo100Instructions(ext_inst_index);
if (ext_inst_key == OpenCLDebugInfo100DebugScope) {
uint32_t inlined_at = 0;
if (inst->num_words > kInlinedAtIndex)
inlined_at = inst->words[kInlinedAtIndex];
last_dbg_scope_ =
DebugScope(inst->words[kLexicalScopeIndex], inlined_at);
module()->SetContainsDebugScope();
return true;
}
if (ext_inst_key == OpenCLDebugInfo100DebugNoScope) {
last_dbg_scope_ = DebugScope(kNoDebugScope, kNoInlinedAt);
module()->SetContainsDebugScope();
return true;
}
} else {
const DebugInfoInstructions ext_inst_key =
DebugInfoInstructions(ext_inst_index);
if (ext_inst_key == DebugInfoDebugScope) {
uint32_t inlined_at = 0;
if (inst->num_words > kInlinedAtIndex)
inlined_at = inst->words[kInlinedAtIndex];
last_dbg_scope_ =
DebugScope(inst->words[kLexicalScopeIndex], inlined_at);
module()->SetContainsDebugScope();
return true;
}
if (ext_inst_key == DebugInfoDebugNoScope) {
last_dbg_scope_ = DebugScope(kNoDebugScope, kNoInlinedAt);
module()->SetContainsDebugScope();
return true;
}
}
}
std::unique_ptr<Instruction> spv_inst(
new Instruction(module()->context(), *inst, std::move(dbg_line_info_)));
dbg_line_info_.clear();
const char* src = source_.c_str();
spv_position_t loc = {inst_index_, 0, 0};
// Handle function and basic block boundaries first, then normal
// instructions.
if (opcode == SpvOpFunction) {
if (function_ != nullptr) {
Error(consumer_, src, loc, "function inside function");
return false;
}
function_ = MakeUnique<Function>(std::move(spv_inst));
} else if (opcode == SpvOpFunctionEnd) {
if (function_ == nullptr) {
Error(consumer_, src, loc,
"OpFunctionEnd without corresponding OpFunction");
return false;
}
if (block_ != nullptr) {
Error(consumer_, src, loc, "OpFunctionEnd inside basic block");
return false;
}
function_->SetFunctionEnd(std::move(spv_inst));
module_->AddFunction(std::move(function_));
function_ = nullptr;
} else if (opcode == SpvOpLabel) {
if (function_ == nullptr) {
Error(consumer_, src, loc, "OpLabel outside function");
return false;
}
if (block_ != nullptr) {
Error(consumer_, src, loc, "OpLabel inside basic block");
return false;
}
block_ = MakeUnique<BasicBlock>(std::move(spv_inst));
} else if (IsTerminatorInst(opcode)) {
if (function_ == nullptr) {
Error(consumer_, src, loc, "terminator instruction outside function");
return false;
}
if (block_ == nullptr) {
Error(consumer_, src, loc, "terminator instruction outside basic block");
return false;
}
if (last_dbg_scope_.GetLexicalScope() != kNoDebugScope)
spv_inst->SetDebugScope(last_dbg_scope_);
block_->AddInstruction(std::move(spv_inst));
function_->AddBasicBlock(std::move(block_));
block_ = nullptr;
last_dbg_scope_ = DebugScope(kNoDebugScope, kNoInlinedAt);
} else {
if (function_ == nullptr) { // Outside function definition
SPIRV_ASSERT(consumer_, block_ == nullptr);
if (opcode == SpvOpCapability) {
module_->AddCapability(std::move(spv_inst));
} else if (opcode == SpvOpExtension) {
module_->AddExtension(std::move(spv_inst));
} else if (opcode == SpvOpExtInstImport) {
module_->AddExtInstImport(std::move(spv_inst));
} else if (opcode == SpvOpMemoryModel) {
module_->SetMemoryModel(std::move(spv_inst));
} else if (opcode == SpvOpEntryPoint) {
module_->AddEntryPoint(std::move(spv_inst));
} else if (opcode == SpvOpExecutionMode) {
module_->AddExecutionMode(std::move(spv_inst));
} else if (IsDebug1Inst(opcode)) {
module_->AddDebug1Inst(std::move(spv_inst));
} else if (IsDebug2Inst(opcode)) {
module_->AddDebug2Inst(std::move(spv_inst));
} else if (IsDebug3Inst(opcode)) {
module_->AddDebug3Inst(std::move(spv_inst));
} else if (IsAnnotationInst(opcode)) {
module_->AddAnnotationInst(std::move(spv_inst));
} else if (IsTypeInst(opcode)) {
module_->AddType(std::move(spv_inst));
} else if (IsConstantInst(opcode) || opcode == SpvOpVariable ||
opcode == SpvOpUndef) {
module_->AddGlobalValue(std::move(spv_inst));
} else if (opcode == SpvOpExtInst &&
spvExtInstIsDebugInfo(inst->ext_inst_type)) {
module_->AddExtInstDebugInfo(std::move(spv_inst));
} else if (opcode == SpvOpExtInst &&
spvExtInstIsNonSemantic(inst->ext_inst_type)) {
// If there are no functions, add the non-semantic instructions to the
// global values. Otherwise append it to the list of the last function.
auto func_begin = module_->begin();
auto func_end = module_->end();
if (func_begin == func_end) {
module_->AddGlobalValue(std::move(spv_inst));
} else {
(--func_end)->AddNonSemanticInstruction(std::move(spv_inst));
}
} else {
Errorf(consumer_, src, loc,
"Unhandled inst type (opcode: %d) found outside function "
"definition.",
opcode);
return false;
}
} else {
if (opcode == SpvOpLoopMerge || opcode == SpvOpSelectionMerge)
last_dbg_scope_ = DebugScope(kNoDebugScope, kNoInlinedAt);
if (last_dbg_scope_.GetLexicalScope() != kNoDebugScope)
spv_inst->SetDebugScope(last_dbg_scope_);
if (opcode == SpvOpExtInst &&
spvExtInstIsDebugInfo(inst->ext_inst_type)) {
const uint32_t ext_inst_index = inst->words[kExtInstSetIndex];
if (inst->ext_inst_type == SPV_EXT_INST_TYPE_OPENCL_DEBUGINFO_100) {
const OpenCLDebugInfo100Instructions ext_inst_key =
OpenCLDebugInfo100Instructions(ext_inst_index);
switch (ext_inst_key) {
case OpenCLDebugInfo100DebugDeclare: {
if (block_ == nullptr) // Inside function but outside blocks
function_->AddDebugInstructionInHeader(std::move(spv_inst));
else
block_->AddInstruction(std::move(spv_inst));
break;
}
case OpenCLDebugInfo100DebugValue: {
if (block_ == nullptr) // Inside function but outside blocks
function_->AddDebugInstructionInHeader(std::move(spv_inst));
else
block_->AddInstruction(std::move(spv_inst));
break;
}
default: {
Errorf(consumer_, src, loc,
"Debug info extension instruction other than DebugScope, "
"DebugNoScope, DebugDeclare, and DebugValue found inside "
"function",
opcode);
return false;
}
}
} else {
const DebugInfoInstructions ext_inst_key =
DebugInfoInstructions(ext_inst_index);
switch (ext_inst_key) {
case DebugInfoDebugDeclare: {
if (block_ == nullptr) // Inside function but outside blocks
function_->AddDebugInstructionInHeader(std::move(spv_inst));
else
block_->AddInstruction(std::move(spv_inst));
break;
}
case DebugInfoDebugValue: {
if (block_ == nullptr) // Inside function but outside blocks
function_->AddDebugInstructionInHeader(std::move(spv_inst));
else
block_->AddInstruction(std::move(spv_inst));
break;
}
default: {
Errorf(consumer_, src, loc,
"Debug info extension instruction other than DebugScope, "
"DebugNoScope, DebugDeclare, and DebugValue found inside "
"function",
opcode);
return false;
}
}
}
} else {
if (block_ == nullptr) { // Inside function but outside blocks
if (opcode != SpvOpFunctionParameter) {
Errorf(consumer_, src, loc,
"Non-OpFunctionParameter (opcode: %d) found inside "
"function but outside basic block",
opcode);
return false;
}
function_->AddParameter(std::move(spv_inst));
} else {
block_->AddInstruction(std::move(spv_inst));
}
}
}
}
return true;
}
// Resolves internal references among the module, functions, basic blocks, etc.
// This function should be called after adding all instructions.
void IrLoader::EndModule() {
if (block_ && function_) {
// We're in the middle of a basic block, but the terminator is missing.
// Register the block anyway. This lets us write tests with less
// boilerplate.
function_->AddBasicBlock(std::move(block_));
block_ = nullptr;
}
if (function_) {
// We're in the middle of a function, but the OpFunctionEnd is missing.
// Register the function anyway. This lets us write tests with less
// boilerplate.
module_->AddFunction(std::move(function_));
function_ = nullptr;
}
for (auto& function : *module_) {
for (auto& bb : function) bb.SetParent(&function);
}
// Copy any trailing Op*Line instruction into the module
module_->SetTrailingDbgLineInfo(std::move(dbg_line_info_));
}
} // namespace opt
} // namespace spvtools