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https://github.com/KhronosGroup/SPIRV-Tools
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fcb22ecf0f
Adds a virtual method, GetFreshIds(), to Transformation. Every transformation uses this to indicate which ids in its protobuf message are fresh ids. This means that when replaying a sequence of transformations the replayer can obtain a smallest id that is not in use by the module already and that will not be used by any transformation by necessity. Ids greater than or equal to this id can be used as overflow ids. Fixes #3851.
81 lines
3.5 KiB
C++
81 lines
3.5 KiB
C++
// Copyright (c) 2020 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_TRANSFORMATION_DUPLICATE_REGION_WITH_SELECTION_H_
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#define SOURCE_FUZZ_TRANSFORMATION_DUPLICATE_REGION_WITH_SELECTION_H_
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/fuzz/transformation.h"
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#include "source/fuzz/transformation_context.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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class TransformationDuplicateRegionWithSelection : public Transformation {
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public:
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explicit TransformationDuplicateRegionWithSelection(
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const protobufs::TransformationDuplicateRegionWithSelection& message);
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explicit TransformationDuplicateRegionWithSelection(
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uint32_t new_entry_fresh_id, uint32_t condition_id,
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uint32_t merge_label_fresh_id, uint32_t entry_block_id,
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uint32_t exit_block_id,
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const std::map<uint32_t, uint32_t>& original_label_to_duplicate_label,
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const std::map<uint32_t, uint32_t>& original_id_to_duplicate_id,
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const std::map<uint32_t, uint32_t>& original_id_to_phi_id);
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// - |new_entry_fresh_id|, |merge_label_fresh_id| must be fresh and distinct.
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// - |condition_id| must refer to a valid instruction of boolean type.
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// - |entry_block_id| and |exit_block_id| must refer to valid blocks and they
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// must form a single-entry, single-exit region. Its constructs and their
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// merge blocks must be either wholly within or wholly outside of the
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// region.
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// - |original_label_to_duplicate_label| must contain at least a key for every
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// block in the original region.
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// - |original_id_to_duplicate_id| must contain at least a key for every
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// result id in the original region.
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// - |original_id_to_phi_id| must contain at least a key for every result id
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// available at the end of the original region.
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// - In each of these three maps, each value must be a distinct, fresh id.
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bool IsApplicable(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context) const override;
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// A transformation that inserts a conditional statement with a boolean
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// expression of arbitrary value and duplicates a given single-entry,
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// single-exit region, so that it is present in each conditional branch and
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// will be executed regardless of which branch will be taken.
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void Apply(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const override;
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// Returns the set of blocks dominated by |entry_block| and post-dominated
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// by |exit_block|.
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static std::set<opt::BasicBlock*> GetRegionBlocks(
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opt::IRContext* ir_context, opt::BasicBlock* entry_block,
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opt::BasicBlock* exit_block);
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std::unordered_set<uint32_t> GetFreshIds() const override;
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protobufs::Transformation ToMessage() const override;
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private:
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protobufs::TransformationDuplicateRegionWithSelection message_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_TRANSFORMATION_DUPLICATE_REGION_WITH_SELECTION_H_
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