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_make_vector_operations_dynamic.h"
16
17 #include "source/fuzz/fuzzer_util.h"
18 #include "source/fuzz/instruction_descriptor.h"
19 #include "source/fuzz/transformation_make_vector_operation_dynamic.h"
20
21 namespace spvtools {
22 namespace fuzz {
23
FuzzerPassMakeVectorOperationsDynamic(opt::IRContext * ir_context,TransformationContext * transformation_context,FuzzerContext * fuzzer_context,protobufs::TransformationSequence * transformations)24 FuzzerPassMakeVectorOperationsDynamic::FuzzerPassMakeVectorOperationsDynamic(
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
Apply()31 void FuzzerPassMakeVectorOperationsDynamic::Apply() {
32 for (auto& function : *GetIRContext()->module()) {
33 for (auto& block : function) {
34 for (auto& instruction : block) {
35 // Randomly decide whether to try applying the transformation.
36 if (!GetFuzzerContext()->ChoosePercentage(
37 GetFuzzerContext()
38 ->GetChanceOfMakingVectorOperationDynamic())) {
39 continue;
40 }
41
42 // |instruction| must be a vector operation.
43 if (!TransformationMakeVectorOperationDynamic::IsVectorOperation(
44 GetIRContext(), &instruction)) {
45 continue;
46 }
47
48 // Make sure |instruction| has only one indexing operand.
49 assert(instruction.NumInOperands() ==
50 (instruction.opcode() == SpvOpCompositeExtract ? 2 : 3) &&
51 "FuzzerPassMakeVectorOperationsDynamic: the composite "
52 "instruction must have "
53 "only one indexing operand.");
54
55 // Applies the make vector operation dynamic transformation.
56 ApplyTransformation(TransformationMakeVectorOperationDynamic(
57 instruction.result_id(),
58 FindOrCreateIntegerConstant(
59 {instruction.GetSingleWordInOperand(
60 instruction.opcode() == SpvOpCompositeExtract ? 1 : 2)},
61 32, GetFuzzerContext()->ChooseEven(), false)));
62 }
63 }
64 }
65 }
66
67 } // namespace fuzz
68 } // namespace spvtools
69