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_propagate_instructions_up.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_propagate_instruction_up.h"
21
22 namespace spvtools {
23 namespace fuzz {
24
FuzzerPassPropagateInstructionsUp(opt::IRContext * ir_context,TransformationContext * transformation_context,FuzzerContext * fuzzer_context,protobufs::TransformationSequence * transformations,bool ignore_inapplicable_transformations)25 FuzzerPassPropagateInstructionsUp::FuzzerPassPropagateInstructionsUp(
26 opt::IRContext* ir_context, TransformationContext* transformation_context,
27 FuzzerContext* fuzzer_context,
28 protobufs::TransformationSequence* transformations,
29 bool ignore_inapplicable_transformations)
30 : FuzzerPass(ir_context, transformation_context, fuzzer_context,
31 transformations, ignore_inapplicable_transformations) {}
32
Apply()33 void FuzzerPassPropagateInstructionsUp::Apply() {
34 for (const auto& function : *GetIRContext()->module()) {
35 for (const auto& block : function) {
36 if (!GetFuzzerContext()->ChoosePercentage(
37 GetFuzzerContext()->GetChanceOfPropagatingInstructionsUp())) {
38 continue;
39 }
40
41 if (TransformationPropagateInstructionUp::IsApplicableToBlock(
42 GetIRContext(), block.id())) {
43 std::map<uint32_t, uint32_t> fresh_ids;
44 for (auto id : GetIRContext()->cfg()->preds(block.id())) {
45 auto& fresh_id = fresh_ids[id];
46
47 if (!fresh_id) {
48 // Create a fresh id if it hasn't been created yet. |fresh_id| will
49 // be default-initialized to 0 in this case.
50 fresh_id = GetFuzzerContext()->GetFreshId();
51 }
52 }
53 ApplyTransformation(
54 TransformationPropagateInstructionUp(block.id(), fresh_ids));
55 }
56 }
57 }
58 }
59
60 } // namespace fuzz
61 } // namespace spvtools
62