2020-09-03 12:19:02 +03:00
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// Copyright (c) 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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2020-09-18 07:37:30 +03:00
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#ifndef SOURCE_FUZZ_FUZZER_PASS_REPLACE_OPSELECTS_WITH_CONDITIONAL_BRANCHES_H_
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#define SOURCE_FUZZ_FUZZER_PASS_REPLACE_OPSELECTS_WITH_CONDITIONAL_BRANCHES_H_
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2020-09-03 12:19:02 +03:00
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#include "source/fuzz/fuzzer_pass.h"
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namespace spvtools {
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namespace fuzz {
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// A fuzzer pass to replace OpSelect instructions (where the condition is a
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// scalar boolean) with conditional branches and OpPhi instructions.
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class FuzzerPassReplaceOpSelectsWithConditionalBranches : public FuzzerPass {
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public:
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FuzzerPassReplaceOpSelectsWithConditionalBranches(
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opt::IRContext* ir_context, TransformationContext* transformation_context,
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FuzzerContext* fuzzer_context,
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2021-07-29 00:59:37 +03:00
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protobufs::TransformationSequence* transformations,
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bool ignore_inapplicable_transformations);
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2020-09-03 12:19:02 +03:00
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void Apply() override;
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private:
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// Returns true if any of the following holds:
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// - the instruction is not the first in its block
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// - the block containing it is a merge block
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// - the block does not have a unique predecessor
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// - the predecessor of the block is the header of a construct
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// - the predecessor does not branch unconditionally to the block
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// If this function returns true, the block must be split before the
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// instruction for TransformationReplaceOpSelectWithConditionalBranch to be
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// applicable.
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// Assumes that the instruction is OpSelect.
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bool InstructionNeedsSplitBefore(opt::Instruction* instruction);
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};
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} // namespace fuzz
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} // namespace spvtools
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2020-09-18 07:37:30 +03:00
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#endif // SOURCE_FUZZ_FUZZER_PASS_REPLACE_OPSELECTS_WITH_CONDITIONAL_BRANCHES_H_
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