mirror of
https://gitee.com/openharmony/third_party_spirv-tools
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107 lines
3.6 KiB
C++
107 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 "source/opt/compact_ids_pass.h"
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#include <cassert>
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#include <unordered_map>
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace opt {
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namespace {
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// Returns the remapped id of |id| from |result_id_mapping|. If the remapped
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// id does not exist, adds a new one to |result_id_mapping| and returns it.
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uint32_t GetRemappedId(
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std::unordered_map<uint32_t, uint32_t>* result_id_mapping, uint32_t id) {
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auto it = result_id_mapping->find(id);
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if (it == result_id_mapping->end()) {
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const uint32_t new_id =
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static_cast<uint32_t>(result_id_mapping->size()) + 1;
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const auto insertion_result = result_id_mapping->emplace(id, new_id);
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it = insertion_result.first;
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assert(insertion_result.second);
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}
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return it->second;
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}
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} // namespace
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Pass::Status CompactIdsPass::Process() {
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bool modified = false;
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std::unordered_map<uint32_t, uint32_t> result_id_mapping;
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// Disable automatic DebugInfo analysis for the life of the CompactIds pass.
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// The DebugInfo manager requires the SPIR-V to be valid to run, but this is
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// not true at all times in CompactIds as it remaps all ids.
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context()->InvalidateAnalyses(IRContext::kAnalysisDebugInfo);
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context()->module()->ForEachInst(
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[&result_id_mapping, &modified](Instruction* inst) {
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auto operand = inst->begin();
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while (operand != inst->end()) {
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const auto type = operand->type;
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if (spvIsIdType(type)) {
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assert(operand->words.size() == 1);
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uint32_t& id = operand->words[0];
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uint32_t new_id = GetRemappedId(&result_id_mapping, id);
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if (id != new_id) {
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modified = true;
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id = new_id;
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// Update data cached in the instruction object.
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if (type == SPV_OPERAND_TYPE_RESULT_ID) {
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inst->SetResultId(id);
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} else if (type == SPV_OPERAND_TYPE_TYPE_ID) {
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inst->SetResultType(id);
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}
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}
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}
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++operand;
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}
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uint32_t scope_id = inst->GetDebugScope().GetLexicalScope();
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if (scope_id != kNoDebugScope) {
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uint32_t new_id = GetRemappedId(&result_id_mapping, scope_id);
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if (scope_id != new_id) {
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inst->UpdateLexicalScope(new_id);
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modified = true;
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}
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}
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uint32_t inlinedat_id = inst->GetDebugInlinedAt();
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if (inlinedat_id != kNoInlinedAt) {
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uint32_t new_id = GetRemappedId(&result_id_mapping, inlinedat_id);
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if (inlinedat_id != new_id) {
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inst->UpdateDebugInlinedAt(new_id);
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modified = true;
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}
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}
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},
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true);
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if (context()->module()->id_bound() != result_id_mapping.size() + 1) {
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modified = true;
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context()->module()->SetIdBound(
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static_cast<uint32_t>(result_id_mapping.size() + 1));
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// There are ids in the feature manager that could now be invalid
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context()->ResetFeatureManager();
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}
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return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
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}
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} // namespace opt
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} // namespace spvtools
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