source/fuzz/fuzzer_pass_replace_linear_algebra_instructions.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/fuzzer_pass_replace_linear_algebra_instructions.h"
  16
  17 #include "source/fuzz/fuzzer_util.h"
  18 #include "source/fuzz/instruction_descriptor.h"
  19 #include "source/fuzz/transformation_replace_linear_algebra_instruction.h"
  20
  21 namespace spvtools {
  22 namespace fuzz {
  23
  24 FuzzerPassReplaceLinearAlgebraInstructions::
  25     FuzzerPassReplaceLinearAlgebraInstructions(
  26         opt::IRContext* ir_context,
  27         TransformationContext* transformation_context,
  28         FuzzerContext* fuzzer_context,
  29         protobufs::TransformationSequence* transformations,
  30         bool ignore_inapplicable_transformations)
  31     : FuzzerPass(ir_context, transformation_context, fuzzer_context,
  32                  transformations, ignore_inapplicable_transformations) {}
  33
  34 void FuzzerPassReplaceLinearAlgebraInstructions::Apply() {
  35   // For each instruction, checks whether it is a linear algebra instruction. In
  36   // this case, the transformation is randomly applied.
  37   for (auto& function : *GetIRContext()->module()) {
  38     for (auto& block : function) {
  39       for (auto& instruction : block) {
  40         if (!spvOpcodeIsLinearAlgebra(instruction.opcode())) {
  41           continue;
  42         }
  43
  44         if (!GetFuzzerContext()->ChoosePercentage(
  45                 GetFuzzerContext()
  46                     ->GetChanceOfReplacingLinearAlgebraInstructions())) {
  47           continue;
  48         }
  49
  50         ApplyTransformation(TransformationReplaceLinearAlgebraInstruction(
  51             GetFuzzerContext()->GetFreshIds(
  52                 TransformationReplaceLinearAlgebraInstruction::
  53                     GetRequiredFreshIdCount(GetIRContext(), &instruction)),
  54             MakeInstructionDescriptor(GetIRContext(), &instruction)));
  55       }
  56     }
  57   }
  58 }
  59
  60 }  // namespace fuzz
  61 }  // namespace spvtools