mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-26 21:30:07 +00:00
dfcb5a1e10
Introduced abstract class for transformations, and refactored all transformations to inherit from this abstract class.
90 lines
3.8 KiB
C++
90 lines
3.8 KiB
C++
// Copyright (c) 2019 Google LLC
|
|
//
|
|
// 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_ADD_DEAD_BREAK_H_
|
|
#define SOURCE_FUZZ_TRANSFORMATION_ADD_DEAD_BREAK_H_
|
|
|
|
#include <vector>
|
|
|
|
#include "source/fuzz/fact_manager.h"
|
|
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
|
|
#include "source/fuzz/transformation.h"
|
|
#include "source/opt/ir_context.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
class TransformationAddDeadBreak : public Transformation {
|
|
public:
|
|
explicit TransformationAddDeadBreak(
|
|
const protobufs::TransformationAddDeadBreak& message);
|
|
|
|
TransformationAddDeadBreak(uint32_t from_block, uint32_t to_block,
|
|
bool break_condition_value,
|
|
std::vector<uint32_t> phi_id);
|
|
|
|
// - |message.from_block| must be the id of a block a in the given module.
|
|
// - |message.to_block| must be the id of a block b in the given module.
|
|
// - if |message.break_condition_value| holds (does not hold) then
|
|
// OpConstantTrue (OpConstantFalse) must be present in the module
|
|
// - |message.phi_ids| must be a list of ids that are all available at
|
|
// |message.from_block|
|
|
// - a and b must be in the same function.
|
|
// - b must be a merge block.
|
|
// - a must end with an unconditional branch to some block c.
|
|
// - replacing this branch with a conditional branch to b or c, with
|
|
// the boolean constant associated with |message.break_condition_value| as
|
|
// the condition, and the ids in |message.phi_ids| used to extend
|
|
// any OpPhi instructions at b as a result of the edge from a, must
|
|
// maintain validity of the module.
|
|
bool IsApplicable(opt::IRContext* context,
|
|
const FactManager& fact_manager) const override;
|
|
|
|
// Replaces the terminator of a with a conditional branch to b or c.
|
|
// The boolean constant associated with |message.break_condition_value| is
|
|
// used as the condition, and the order of b and c is arranged such that
|
|
// control is guaranteed to jump to c.
|
|
void Apply(opt::IRContext* context, FactManager* fact_manager) const override;
|
|
|
|
protobufs::Transformation ToMessage() const override;
|
|
|
|
private:
|
|
// Return the block with id |maybe_block_id| if it exists, and nullptr
|
|
// otherwise.
|
|
opt::BasicBlock* MaybeFindBlock(opt::IRContext* context,
|
|
uint32_t maybe_block_id) const;
|
|
|
|
// Returns true if and only if the phi ids associated with |message_| are
|
|
// sufficient to allow an edge from |bb_from| to |bb_to| to be added.
|
|
bool PhiIdsOk(opt::IRContext* context, opt::BasicBlock* bb_from,
|
|
opt::BasicBlock* bb_to) const;
|
|
|
|
// Returns true if and only if |message_.from_block| is in the continue
|
|
// construct of a loop headed at |maybe_loop_header|.
|
|
bool FromBlockIsInLoopContinueConstruct(opt::IRContext* context,
|
|
uint32_t maybe_loop_header) const;
|
|
|
|
// Returns true if and only if adding an edge from |bb_from| to
|
|
// |message_.to_block| respects structured control flow.
|
|
bool AddingBreakRespectsStructuredControlFlow(opt::IRContext* context,
|
|
opt::BasicBlock* bb_from) const;
|
|
|
|
protobufs::TransformationAddDeadBreak message_;
|
|
};
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|
|
|
|
#endif // SOURCE_FUZZ_TRANSFORMATION_ADD_DEAD_BREAK_H_
|