mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-10-19 03:20:14 +00:00
efe12ff5a1
Originally the passes that extended from MemPass were those that are of the def-use manager. I am assuming they would be able to preserve it because of that. Added a check to verify consistency of the IRContext. The IRContext relies on the pass to tell it if something is invalidated. It is possible that the pass lied. To help identify those situations, we will check if the valid analyses are correct after each pass. This will be enabled by default for the debug build, and disabled in the production build. It can be disabled in the debug build by adding "-DSPIRV_CHECK_CONTEXT=OFF" to the cmake command.
123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
// Copyright (c) 2017 Google Inc.
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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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#include "ir_context.h"
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#include "log.h"
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namespace spvtools {
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namespace ir {
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void IRContext::BuildInvalidAnalyses(IRContext::Analysis set) {
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if (set & kAnalysisDefUse) {
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BuildDefUseManager();
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}
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}
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void IRContext::InvalidateAnalysesExceptFor(
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IRContext::Analysis preserved_analyses) {
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uint32_t analyses_to_invalidate = valid_analyses_ & (~preserved_analyses);
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if (analyses_to_invalidate & kAnalysisDefUse) {
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def_use_mgr_.reset(nullptr);
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}
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valid_analyses_ = Analysis(valid_analyses_ & ~analyses_to_invalidate);
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}
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void IRContext::KillInst(ir::Instruction* inst) {
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if (!inst) {
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return;
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}
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if (AreAnalysesValid(kAnalysisDefUse)) {
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get_def_use_mgr()->ClearInst(inst);
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}
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inst->ToNop();
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}
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bool IRContext::KillDef(uint32_t id) {
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ir::Instruction* def = get_def_use_mgr()->GetDef(id);
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if (def != nullptr) {
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KillInst(def);
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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 IRContext::ReplaceAllUsesWith(uint32_t before, uint32_t after) {
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if (before == after) return false;
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opt::analysis::UseList* uses = get_def_use_mgr()->GetUses(before);
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if (uses == nullptr) return false;
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std::vector<opt::analysis::Use> uses_to_update;
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for (auto it = uses->cbegin(); it != uses->cend(); ++it) {
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uses_to_update.push_back(*it);
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}
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for (opt::analysis::Use& use : uses_to_update) {
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ForgetUses(use.inst);
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const uint32_t type_result_id_count =
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(use.inst->result_id() != 0) + (use.inst->type_id() != 0);
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if (use.operand_index < type_result_id_count) {
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// Update the type_id. Note that result id is immutable so it should
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// never be updated.
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if (use.inst->type_id() != 0 && use.operand_index == 0) {
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use.inst->SetResultType(after);
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} else if (use.inst->type_id() == 0) {
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SPIRV_ASSERT(consumer_, false,
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"Result type id considered as use while the instruction "
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"doesn't have a result type id.");
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(void)consumer_; // Makes the compiler happy for release build.
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} else {
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SPIRV_ASSERT(consumer_, false,
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"Trying setting the immutable result id.");
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}
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} else {
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// Update an in-operand.
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uint32_t in_operand_pos = use.operand_index - type_result_id_count;
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// Make the modification in the instruction.
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use.inst->SetInOperand(in_operand_pos, {after});
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}
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AnalyzeUses(use.inst);
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}
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return true;
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}
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bool IRContext::IsConsistent() {
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#ifndef SPIRV_CHECK_CONTEXT
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return true;
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#endif
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if (AreAnalysesValid(kAnalysisDefUse)) {
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opt::analysis::DefUseManager new_def_use(module());
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if (*get_def_use_mgr() != new_def_use) {
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return false;
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}
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}
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return true;
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}
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void spvtools::ir::IRContext::ForgetUses(Instruction* inst) {
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if (AreAnalysesValid(kAnalysisDefUse)) {
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get_def_use_mgr()->EraseUseRecordsOfOperandIds(inst);
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}
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}
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void IRContext::AnalyzeUses(Instruction* inst) {
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if (AreAnalysesValid(kAnalysisDefUse)) {
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get_def_use_mgr()->AnalyzeInstUse(inst);
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}
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}
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} // namespace ir
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} // namespace spvtools
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