source/fuzz/transformation_swap_commutable_operands.cpp

   1 // Copyright (c) 2020 André Perez Maselco
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #include "source/fuzz/transformation_swap_commutable_operands.h"
  16
  17 #include "source/fuzz/fuzzer_util.h"
  18 #include "source/fuzz/instruction_descriptor.h"
  19
  20 namespace spvtools {
  21 namespace fuzz {
  22
  23 TransformationSwapCommutableOperands::TransformationSwapCommutableOperands(
  24     protobufs::TransformationSwapCommutableOperands message)
  25     : message_(std::move(message)) {}
  26
  27 TransformationSwapCommutableOperands::TransformationSwapCommutableOperands(
  28     const protobufs::InstructionDescriptor& instruction_descriptor) {
  29   *message_.mutable_instruction_descriptor() = instruction_descriptor;
  30 }
  31
  32 bool TransformationSwapCommutableOperands::IsApplicable(
  33     opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
  34   auto instruction =
  35       FindInstruction(message_.instruction_descriptor(), ir_context);
  36   if (instruction == nullptr) return false;
  37
  38   spv::Op opcode = static_cast<spv::Op>(
  39       message_.instruction_descriptor().target_instruction_opcode());
  40   assert(spv::Op(instruction->opcode()) == opcode &&
  41          "The located instruction must have the same opcode as in the "
  42          "descriptor.");
  43   return spvOpcodeIsCommutativeBinaryOperator(opcode);
  44 }
  45
  46 void TransformationSwapCommutableOperands::Apply(
  47     opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
  48   auto instruction =
  49       FindInstruction(message_.instruction_descriptor(), ir_context);
  50   // By design, the instructions defined to be commutative have exactly two
  51   // input parameters.
  52   std::swap(instruction->GetInOperand(0), instruction->GetInOperand(1));
  53 }
  54
  55 protobufs::Transformation TransformationSwapCommutableOperands::ToMessage()
  56     const {
  57   protobufs::Transformation result;
  58   *result.mutable_swap_commutable_operands() = message_;
  59   return result;
  60 }
  61
  62 std::unordered_set<uint32_t> TransformationSwapCommutableOperands::GetFreshIds()
  63     const {
  64   return std::unordered_set<uint32_t>();
  65 }
  66
  67 }  // namespace fuzz
  68 }  // namespace spvtools