mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-27 10:20:14 +00:00
89 lines
3.8 KiB
C++
89 lines
3.8 KiB
C++
// Copyright (c) 2020 Vasyl Teliman
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef SOURCE_FUZZ_TRANSFORMATION_WRAP_REGION_IN_SELECTION_H_
|
|
#define SOURCE_FUZZ_TRANSFORMATION_WRAP_REGION_IN_SELECTION_H_
|
|
|
|
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
|
|
#include "source/fuzz/transformation.h"
|
|
#include "source/fuzz/transformation_context.h"
|
|
#include "source/opt/ir_context.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
class TransformationWrapRegionInSelection : public Transformation {
|
|
public:
|
|
explicit TransformationWrapRegionInSelection(
|
|
const protobufs::TransformationWrapRegionInSelection& message);
|
|
|
|
TransformationWrapRegionInSelection(uint32_t region_entry_block_id,
|
|
uint32_t region_exit_block_id,
|
|
bool branch_condition);
|
|
|
|
// - It should be possible to apply this transformation to a
|
|
// single-exit-single-entry region of blocks dominated by
|
|
// |region_entry_block_id| and postdominated by |region_exit_block_id|
|
|
// (see IsApplicableToBlockRange method for further details).
|
|
//
|
|
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/3828):
|
|
// Consider applying this transformation to non-single-entry-single-exit
|
|
// regions of blocks.
|
|
// - There must exist an irrelevant boolean constant with value
|
|
// |branch_condition|.
|
|
bool IsApplicable(
|
|
opt::IRContext* ir_context,
|
|
const TransformationContext& transformation_context) const override;
|
|
|
|
// - Transforms |region_entry_block_id| into a selection header with both
|
|
// branches pointing to the block's successor.
|
|
// - |branch_condition| is used as a condition in the header's
|
|
// OpBranchConditional instruction.
|
|
// - Transforms |region_exit_block_id| into a merge block of the selection's
|
|
// header.
|
|
void Apply(opt::IRContext* ir_context,
|
|
TransformationContext* transformation_context) const override;
|
|
|
|
protobufs::Transformation ToMessage() const override;
|
|
|
|
// Returns true if it's possible to apply this transformation to the
|
|
// single-exit-single-entry region of blocks starting with
|
|
// |header_block_candidate_id| and ending with |merge_block_candidate_id|.
|
|
// Concretely:
|
|
// - Both |header_block_candidate_id| and |merge_block_candidate_id| must be
|
|
// result ids of some blocks in the module.
|
|
// - Both blocks must belong to the same function.
|
|
// - |header_block_candidate_id| must strictly dominate
|
|
// |merge_block_candidate_id| and |merge_block_candidate_id| must strictly
|
|
// postdominate |header_block_candidate_id|.
|
|
// - |header_block_candidate_id| can't be a header block of any construct.
|
|
// - |header_block_candidate_id|'s terminator must be an OpBranch.
|
|
// - |merge_block_candidate_id| can't be a merge block of any other construct.
|
|
// - Both |header_block_candidate_id| and |merge_block_candidate_id| must be
|
|
// inside the same construct if any.
|
|
static bool IsApplicableToBlockRange(opt::IRContext* ir_context,
|
|
uint32_t header_block_candidate_id,
|
|
uint32_t merge_block_candidate_id);
|
|
|
|
std::unordered_set<uint32_t> GetFreshIds() const override;
|
|
|
|
private:
|
|
protobufs::TransformationWrapRegionInSelection message_;
|
|
};
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|
|
|
|
#endif // SOURCE_FUZZ_TRANSFORMATION_WRAP_REGION_IN_SELECTION_H_
|