mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
// Copyright (c) 2021 Mostafa Ashraf
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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/transformation_swap_function_variables.h"
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#include "source/fuzz/fuzzer_util.h"
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namespace spvtools {
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namespace fuzz {
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TransformationSwapFunctionVariables::TransformationSwapFunctionVariables(
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protobufs::TransformationSwapFunctionVariables message)
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: message_(std::move(message)) {}
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TransformationSwapFunctionVariables::TransformationSwapFunctionVariables(
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uint32_t result_id1, uint32_t result_id2) {
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message_.set_result_id1(result_id1);
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message_.set_result_id2(result_id2);
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}
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bool TransformationSwapFunctionVariables::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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uint32_t result_id1 = message_.result_id1();
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uint32_t result_id2 = message_.result_id2();
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assert((result_id1 != result_id2) && "Two results ids are equal");
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// The result ids used in the message must refer to instructions.
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auto instruction1 = ir_context->get_def_use_mgr()->GetDef(result_id1);
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auto instruction2 = ir_context->get_def_use_mgr()->GetDef(result_id2);
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if (instruction1 == nullptr || instruction2 == nullptr) {
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return false;
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}
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// Both instructions must be variables.
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if (instruction1->opcode() != SpvOpVariable ||
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instruction2->opcode() != SpvOpVariable) {
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return false;
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}
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// Both variable instructions must be in some basic block (as they are
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// function-local variables), and they must be in the same block (as they need
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// to be variables of the same function).
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auto* block_1 = ir_context->get_instr_block(result_id1);
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auto* block_2 = ir_context->get_instr_block(result_id2);
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if (block_1 == nullptr || block_2 == nullptr) {
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return false;
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}
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return block_1 == block_2;
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}
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void TransformationSwapFunctionVariables::Apply(
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opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
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// The result ids used in the message must refer to instructions.
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auto instruction1 =
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ir_context->get_def_use_mgr()->GetDef(message_.result_id1());
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auto instruction2 =
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ir_context->get_def_use_mgr()->GetDef(message_.result_id2());
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std::unique_ptr<opt::Instruction> temp_instruction =
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MakeUnique<opt::Instruction>();
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temp_instruction->InsertBefore(instruction1);
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instruction1->InsertAfter(instruction2);
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instruction2->InsertAfter(temp_instruction.get());
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temp_instruction->RemoveFromList();
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}
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protobufs::Transformation TransformationSwapFunctionVariables::ToMessage()
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const {
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protobufs::Transformation result;
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*result.mutable_swap_function_variables() = message_;
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return result;
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}
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std::unordered_set<uint32_t> TransformationSwapFunctionVariables::GetFreshIds()
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const {
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return std::unordered_set<uint32_t>();
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}
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} // namespace fuzz
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} // namespace spvtools
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