mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-26 13:20:05 +00:00
6382cbb497
Avoids invalidating all analyses in transformations that add constants, OpUndef and global and local variables.
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
// Copyright (c) 2019 Google LLC
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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/fuzz/transformation_add_constant_scalar.h"
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#include "source/fuzz/fuzzer_util.h"
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namespace spvtools {
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namespace fuzz {
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TransformationAddConstantScalar::TransformationAddConstantScalar(
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spvtools::fuzz::protobufs::TransformationAddConstantScalar message)
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: message_(std::move(message)) {}
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TransformationAddConstantScalar::TransformationAddConstantScalar(
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uint32_t fresh_id, uint32_t type_id, const std::vector<uint32_t>& words,
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bool is_irrelevant) {
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message_.set_fresh_id(fresh_id);
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message_.set_type_id(type_id);
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message_.set_is_irrelevant(is_irrelevant);
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for (auto word : words) {
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message_.add_word(word);
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}
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}
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bool TransformationAddConstantScalar::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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// The id needs to be fresh.
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if (!fuzzerutil::IsFreshId(ir_context, message_.fresh_id())) {
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return false;
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}
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// The type id for the scalar must exist and be a type.
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auto type = ir_context->get_type_mgr()->GetType(message_.type_id());
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if (!type) {
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return false;
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}
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uint32_t width;
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if (type->AsFloat()) {
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width = type->AsFloat()->width();
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} else if (type->AsInteger()) {
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width = type->AsInteger()->width();
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} else {
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return false;
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}
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// The number of words is the integer floor of the width.
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auto words = (width + 32 - 1) / 32;
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// The number of words provided by the transformation needs to match the
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// width of the type.
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return static_cast<uint32_t>(message_.word().size()) == words;
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}
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void TransformationAddConstantScalar::Apply(
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opt::IRContext* ir_context,
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TransformationContext* transformation_context) const {
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auto new_instruction = MakeUnique<opt::Instruction>(
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ir_context, SpvOpConstant, message_.type_id(), message_.fresh_id(),
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opt::Instruction::OperandList(
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{{SPV_OPERAND_TYPE_LITERAL_INTEGER,
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std::vector<uint32_t>(message_.word().begin(),
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message_.word().end())}}));
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auto new_instruction_ptr = new_instruction.get();
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ir_context->module()->AddGlobalValue(std::move(new_instruction));
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fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
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// Inform the def-use manager about the new instruction. Invalidate the
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// constant manager as we have added a new constant.
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ir_context->get_def_use_mgr()->AnalyzeInstDef(new_instruction_ptr);
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ir_context->InvalidateAnalyses(opt::IRContext::kAnalysisConstants);
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if (message_.is_irrelevant()) {
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transformation_context->GetFactManager()->AddFactIdIsIrrelevant(
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message_.fresh_id());
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}
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}
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protobufs::Transformation TransformationAddConstantScalar::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_add_constant_scalar() = message_;
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return result;
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}
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std::unordered_set<uint32_t> TransformationAddConstantScalar::GetFreshIds()
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const {
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return {message_.fresh_id()};
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}
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} // namespace fuzz
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} // namespace spvtools
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