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https://github.com/KhronosGroup/SPIRV-Tools
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26dba32c43
A new pass that allows the fuzzer to change the 'selection control' operand of OpSelectionControl instructions. Fixes #2937.
61 lines
2.3 KiB
C++
61 lines
2.3 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/transformation_set_selection_control.h"
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namespace spvtools {
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namespace fuzz {
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TransformationSetSelectionControl::TransformationSetSelectionControl(
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const spvtools::fuzz::protobufs::TransformationSetSelectionControl& message)
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: message_(message) {}
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TransformationSetSelectionControl::TransformationSetSelectionControl(
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uint32_t block_id, uint32_t selection_control) {
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message_.set_block_id(block_id);
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message_.set_selection_control(selection_control);
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}
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bool TransformationSetSelectionControl::IsApplicable(
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opt::IRContext* context, const FactManager& /*unused*/) const {
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assert((message_.selection_control() == SpvSelectionControlMaskNone ||
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message_.selection_control() == SpvSelectionControlFlattenMask ||
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message_.selection_control() == SpvSelectionControlDontFlattenMask) &&
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"Selection control should never be set to something other than "
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"'None', 'Flatten' or 'DontFlatten'");
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if (auto block = context->get_instr_block(message_.block_id())) {
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if (auto merge_inst = block->GetMergeInst()) {
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return merge_inst->opcode() == SpvOpSelectionMerge;
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}
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}
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// Either the block did not exit, or did not end with OpSelectionMerge.
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return false;
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}
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void TransformationSetSelectionControl::Apply(opt::IRContext* context,
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FactManager* /*unused*/) const {
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context->get_instr_block(message_.block_id())
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->GetMergeInst()
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->SetInOperand(1, {message_.selection_control()});
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}
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protobufs::Transformation TransformationSetSelectionControl::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_set_selection_control() = message_;
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return result;
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}
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} // namespace fuzz
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} // namespace spvtools
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