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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.
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
// Copyright (c) 2020 Vasyl Teliman
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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_permute_phi_operands.h"
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#include <vector>
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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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TransformationPermutePhiOperands::TransformationPermutePhiOperands(
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const spvtools::fuzz::protobufs::TransformationPermutePhiOperands& message)
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: message_(message) {}
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TransformationPermutePhiOperands::TransformationPermutePhiOperands(
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uint32_t result_id, const std::vector<uint32_t>& permutation) {
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message_.set_result_id(result_id);
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for (auto index : permutation) {
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message_.add_permutation(index);
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}
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}
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bool TransformationPermutePhiOperands::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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// Check that |message_.result_id| is valid.
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const auto* inst =
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ir_context->get_def_use_mgr()->GetDef(message_.result_id());
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if (!inst || inst->opcode() != SpvOpPhi) {
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return false;
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}
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// Check that |message_.permutation| has expected size.
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auto expected_permutation_size = inst->NumInOperands() / 2;
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if (static_cast<uint32_t>(message_.permutation().size()) !=
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expected_permutation_size) {
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return false;
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}
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// Check that |message_.permutation| has elements in range
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// [0, expected_permutation_size - 1].
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std::vector<uint32_t> permutation(message_.permutation().begin(),
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message_.permutation().end());
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assert(!fuzzerutil::HasDuplicates(permutation) &&
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"Permutation has duplicates");
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// We must check whether the permutation is empty first because in that case
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// |expected_permutation_size - 1| will produce
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// |std::numeric_limits<uint32_t>::max()| since it's an unsigned integer.
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return permutation.empty() ||
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fuzzerutil::IsPermutationOfRange(permutation, 0,
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expected_permutation_size - 1);
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}
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void TransformationPermutePhiOperands::Apply(
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opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
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auto* inst = ir_context->get_def_use_mgr()->GetDef(message_.result_id());
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assert(inst);
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opt::Instruction::OperandList permuted_operands;
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permuted_operands.reserve(inst->NumInOperands());
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for (auto index : message_.permutation()) {
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permuted_operands.push_back(std::move(inst->GetInOperand(2 * index)));
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permuted_operands.push_back(std::move(inst->GetInOperand(2 * index + 1)));
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}
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inst->SetInOperands(std::move(permuted_operands));
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// Make sure our changes are analyzed
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ir_context->InvalidateAnalysesExceptFor(
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opt::IRContext::Analysis::kAnalysisNone);
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}
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protobufs::Transformation TransformationPermutePhiOperands::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_permute_phi_operands() = message_;
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return result;
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}
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std::unordered_set<uint32_t> TransformationPermutePhiOperands::GetFreshIds()
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const {
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return std::unordered_set<uint32_t>();
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}
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} // namespace fuzz
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} // namespace spvtools
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