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The transformation can, for example, replace "true" with "12.0 > 6.0", if constants for those floating-point values are available. This introduces a new 'id use descriptor' structure, which provides a way to describe a particular use of an id, and which will be heavily used in future transformations. Describing an id use is trivial if the use occurs in an instruction that itself generates an id, but is less straightforward if the id of interest is used by an instruction such as OpStore that does not have a result id. The 'id use descriptor' structure caters for such cases.
43 lines
1.6 KiB
C++
43 lines
1.6 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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} // 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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