mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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fcb22ecf0f
Adds a virtual method, GetFreshIds(), to Transformation. Every transformation uses this to indicate which ids in its protobuf message are fresh ids. This means that when replaying a sequence of transformations the replayer can obtain a smallest id that is not in use by the module already and that will not be used by any transformation by necessity. Ids greater than or equal to this id can be used as overflow ids. Fixes #3851.
100 lines
3.3 KiB
C++
100 lines
3.3 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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const spvtools::fuzz::protobufs::TransformationAddConstantScalar& message)
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: message_(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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ir_context->module()->AddGlobalValue(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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fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
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// We have added an instruction to the module, so need to be careful about the
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// validity of existing analyses.
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ir_context->InvalidateAnalysesExceptFor(
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opt::IRContext::Analysis::kAnalysisNone);
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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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