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)24 FuzzerPassExpandVectorReductions::FuzzerPassExpandVectorReductions(
25 opt::IRContext* ir_context, TransformationContext* transformation_context,
26 FuzzerContext* fuzzer_context,
27 protobufs::TransformationSequence* transformations)
28 : FuzzerPass(ir_context, transformation_context, fuzzer_context,
29 transformations) {}
30
31 FuzzerPassExpandVectorReductions::~FuzzerPassExpandVectorReductions() = default;
32
Apply()33 void FuzzerPassExpandVectorReductions::Apply() {
34 for (auto& function : *GetIRContext()->module()) {
35 for (auto& block : function) {
36 for (auto& instruction : block) {
37 // Randomly decides whether the transformation will be applied.
38 if (!GetFuzzerContext()->ChoosePercentage(
39 GetFuzzerContext()->GetChanceOfExpandingVectorReduction())) {
40 continue;
41 }
42
43 // |instruction| must be OpAny or OpAll.
44 if (instruction.opcode() != SpvOpAny &&
45 instruction.opcode() != SpvOpAll) {
46 continue;
47 }
48
49 // It must be able to make a synonym of |instruction|.
50 if (!fuzzerutil::CanMakeSynonymOf(
51 GetIRContext(), *GetTransformationContext(), &instruction)) {
52 continue;
53 }
54
55 // Applies the expand vector reduction transformation.
56 ApplyTransformation(TransformationExpandVectorReduction(
57 instruction.result_id(),
58 GetFuzzerContext()->GetFreshIds(
59 TransformationExpandVectorReduction::GetRequiredFreshIdCount(
60 GetIRContext(), &instruction))));
61 }
62 }
63 }
64 }
65
66 } // namespace fuzz
67 } // namespace spvtools
68