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https://github.com/KhronosGroup/SPIRV-Tools
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0a07cd1c9a
If the fuzzer's fact manager knows that ids A and B are synonymous, it can replace a use of A with a use of B, so long as various conditions hold (e.g. the definition of B must dominate the use of A, and it is not legal to replace a use of an OpConstant in a struct's access chain with a synonym that is not an OpConstant). This change adds a fuzzer pass to sprinke such synonym replacements through the module.
49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
// Copyright (c) 2019 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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#ifndef SOURCE_FUZZ_ID_USE_LOCATOR_H_
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#define SOURCE_FUZZ_ID_USE_LOCATOR_H_
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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namespace transformation {
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// Looks for an instruction in |context| such that the id use represented by
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// |descriptor| is one of the operands to said instruction. Returns |nullptr|
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// if no such instruction can be found.
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opt::Instruction* FindInstruction(const protobufs::IdUseDescriptor& descriptor,
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opt::IRContext* context);
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// Creates an IdUseDescriptor protobuf message from the given components.
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// See the protobuf definition for details of what these components mean.
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protobufs::IdUseDescriptor MakeIdUseDescriptor(
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uint32_t id_of_interest, SpvOp target_instruction_opcode,
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uint32_t in_operand_index, uint32_t base_instruction_result_id,
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uint32_t num_opcodes_to_ignore);
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// Given an id use, represented by the instruction |inst| that uses the id, and
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// the input operand index |in_operand_index| associated with the usage, returns
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// an IdUseDescriptor that represents the use.
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protobufs::IdUseDescriptor MakeIdUseDescriptorFromUse(
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opt::IRContext* context, opt::Instruction* inst, uint32_t in_operand_index);
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} // namespace transformation
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_ID_USE_LOCATOR_H_
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