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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.
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
// Copyright (c) 2020 André Perez Maselco
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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_swap_commutable_operands.h"
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#include "source/fuzz/fuzzer_util.h"
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#include "source/fuzz/instruction_descriptor.h"
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namespace spvtools {
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namespace fuzz {
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TransformationSwapCommutableOperands::TransformationSwapCommutableOperands(
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const spvtools::fuzz::protobufs::TransformationSwapCommutableOperands&
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message)
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: message_(message) {}
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TransformationSwapCommutableOperands::TransformationSwapCommutableOperands(
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const protobufs::InstructionDescriptor& instruction_descriptor) {
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*message_.mutable_instruction_descriptor() = instruction_descriptor;
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}
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bool TransformationSwapCommutableOperands::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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auto instruction =
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FindInstruction(message_.instruction_descriptor(), ir_context);
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if (instruction == nullptr) return false;
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SpvOp opcode = static_cast<SpvOp>(
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message_.instruction_descriptor().target_instruction_opcode());
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assert(instruction->opcode() == opcode &&
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"The located instruction must have the same opcode as in the "
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"descriptor.");
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return spvOpcodeIsCommutativeBinaryOperator(opcode);
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}
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void TransformationSwapCommutableOperands::Apply(
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opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
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auto instruction =
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FindInstruction(message_.instruction_descriptor(), ir_context);
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// By design, the instructions defined to be commutative have exactly two
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// input parameters.
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std::swap(instruction->GetInOperand(0), instruction->GetInOperand(1));
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}
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protobufs::Transformation TransformationSwapCommutableOperands::ToMessage()
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const {
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protobufs::Transformation result;
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*result.mutable_swap_commutable_operands() = message_;
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return result;
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}
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std::unordered_set<uint32_t> TransformationSwapCommutableOperands::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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