mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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3eda1b9ff1
A refactoring that separates the identification of an instruction from the identification of a use in an instruction, to enable the former to be used independently of the latter.
83 lines
2.7 KiB
C++
83 lines
2.7 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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#include "source/fuzz/id_use_descriptor.h"
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#include "source/fuzz/instruction_descriptor.h"
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namespace spvtools {
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namespace fuzz {
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opt::Instruction* FindInstructionContainingUse(
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const protobufs::IdUseDescriptor& id_use_descriptor,
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opt::IRContext* context) {
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auto result =
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FindInstruction(id_use_descriptor.enclosing_instruction(), context);
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if (!result) {
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return nullptr;
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}
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if (id_use_descriptor.in_operand_index() >= result->NumInOperands()) {
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return nullptr;
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}
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if (result->GetSingleWordInOperand(id_use_descriptor.in_operand_index()) !=
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id_use_descriptor.id_of_interest()) {
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return nullptr;
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}
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return result;
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}
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protobufs::IdUseDescriptor MakeIdUseDescriptor(
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uint32_t id_of_interest,
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const protobufs::InstructionDescriptor& enclosing_instruction,
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uint32_t in_operand_index) {
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protobufs::IdUseDescriptor result;
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result.set_id_of_interest(id_of_interest);
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*result.mutable_enclosing_instruction() = enclosing_instruction;
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result.set_in_operand_index(in_operand_index);
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return result;
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}
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protobufs::IdUseDescriptor MakeIdUseDescriptorFromUse(
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opt::IRContext* context, opt::Instruction* inst,
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uint32_t in_operand_index) {
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auto in_operand = inst->GetInOperand(in_operand_index);
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assert(in_operand.type == SPV_OPERAND_TYPE_ID);
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auto id_of_interest = in_operand.words[0];
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auto block = context->get_instr_block(inst);
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uint32_t base_instruction_result_id = block->id();
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uint32_t num_opcodes_to_ignore = 0;
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for (auto& inst_in_block : *block) {
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if (inst_in_block.HasResultId()) {
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base_instruction_result_id = inst_in_block.result_id();
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num_opcodes_to_ignore = 0;
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}
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if (&inst_in_block == inst) {
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return MakeIdUseDescriptor(
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id_of_interest,
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MakeInstructionDescriptor(base_instruction_result_id, inst->opcode(),
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num_opcodes_to_ignore),
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in_operand_index);
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}
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if (inst_in_block.opcode() == inst->opcode()) {
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num_opcodes_to_ignore++;
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}
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}
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assert(false && "No matching instruction was found.");
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return protobufs::IdUseDescriptor();
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}
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} // namespace fuzz
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} // namespace spvtools
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