1 // Copyright (c) 2020 Vasyl Teliman
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_swap_conditional_branch_operands.h"
16
17 #include "source/fuzz/fuzzer_context.h"
18 #include "source/fuzz/fuzzer_util.h"
19 #include "source/fuzz/instruction_descriptor.h"
20 #include "source/fuzz/transformation_swap_conditional_branch_operands.h"
21
22 namespace spvtools {
23 namespace fuzz {
24
25 FuzzerPassSwapBranchConditionalOperands::
FuzzerPassSwapBranchConditionalOperands(opt::IRContext * ir_context,TransformationContext * transformation_context,FuzzerContext * fuzzer_context,protobufs::TransformationSequence * transformations)26 FuzzerPassSwapBranchConditionalOperands(
27 opt::IRContext* ir_context,
28 TransformationContext* transformation_context,
29 FuzzerContext* fuzzer_context,
30 protobufs::TransformationSequence* transformations)
31 : FuzzerPass(ir_context, transformation_context, fuzzer_context,
32 transformations) {}
33
Apply()34 void FuzzerPassSwapBranchConditionalOperands::Apply() {
35 ForEachInstructionWithInstructionDescriptor(
36 [this](opt::Function* /*unused*/, opt::BasicBlock* /*unused*/,
37 opt::BasicBlock::iterator inst_it,
38 const protobufs::InstructionDescriptor& instruction_descriptor) {
39 const auto& inst = *inst_it;
40
41 if (inst.opcode() != SpvOpBranchConditional) {
42 return;
43 }
44
45 if (!GetFuzzerContext()->ChoosePercentage(
46 GetFuzzerContext()
47 ->GetChanceOfSwappingConditionalBranchOperands())) {
48 return;
49 }
50
51 ApplyTransformation(TransformationSwapConditionalBranchOperands(
52 instruction_descriptor, GetFuzzerContext()->GetFreshId()));
53 });
54 }
55
56 } // namespace fuzz
57 } // namespace spvtools
58