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_expand_vector_reductions.h"
16
17 #include "source/fuzz/fuzzer_util.h"
18 #include "source/fuzz/instruction_descriptor.h"
19 #include "source/fuzz/transformation_expand_vector_reduction.h"
20
21 namespace spvtools {
22 namespace fuzz {
23
FuzzerPassExpandVectorReductions(opt::IRContext * ir_context,TransformationContext * transformation_context,FuzzerContext * fuzzer_context,protobufs::TransformationSequence * transformations,bool ignore_inapplicable_transformations)24 FuzzerPassExpandVectorReductions::FuzzerPassExpandVectorReductions(
25 opt::IRContext* ir_context, TransformationContext* transformation_context,
26 FuzzerContext* fuzzer_context,
27 protobufs::TransformationSequence* transformations,
28 bool ignore_inapplicable_transformations)
29 : FuzzerPass(ir_context, transformation_context, fuzzer_context,
30 transformations, ignore_inapplicable_transformations) {}
31
Apply()32 void FuzzerPassExpandVectorReductions::Apply() {
33 for (auto& function : *GetIRContext()->module()) {
34 for (auto& block : function) {
35 for (auto& instruction : block) {
36 // Randomly decides whether the transformation will be applied.
37 if (!GetFuzzerContext()->ChoosePercentage(
38 GetFuzzerContext()->GetChanceOfExpandingVectorReduction())) {
39 continue;
40 }
41
42 // |instruction| must be OpAny or OpAll.
43 if (instruction.opcode() != spv::Op::OpAny &&
44 instruction.opcode() != spv::Op::OpAll) {
45 continue;
46 }
47
48 // It must be able to make a synonym of |instruction|.
49 if (!fuzzerutil::CanMakeSynonymOf(
50 GetIRContext(), *GetTransformationContext(), instruction)) {
51 continue;
52 }
53
54 // Applies the expand vector reduction transformation.
55 ApplyTransformation(TransformationExpandVectorReduction(
56 instruction.result_id(),
57 GetFuzzerContext()->GetFreshIds(
58 TransformationExpandVectorReduction::GetRequiredFreshIdCount(
59 GetIRContext(), &instruction))));
60 }
61 }
62 }
63 }
64
65 } // namespace fuzz
66 } // namespace spvtools
67