SPIRV-Tools/source/fuzz/transformation_push_id_through_variable.h
André Perez f050cca7ec
spirv-fuzz: Add push id through variable transformation (#3359)
Makes an id synonym by storing an id to a new variable and then
loading it back from that variable.

Fixes #3192.
2020-05-29 16:43:38 +01:00

65 lines
2.5 KiB
C++

// Copyright (c) 2020 André Perez Maselco
//
// 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_PUSH_ID_THROUGH_VARIABLE_H_
#define SOURCE_FUZZ_TRANSFORMATION_PUSH_ID_THROUGH_VARIABLE_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 TransformationPushIdThroughVariable : public Transformation {
public:
explicit TransformationPushIdThroughVariable(
const protobufs::TransformationPushIdThroughVariable& message);
TransformationPushIdThroughVariable(
uint32_t value_id, uint32_t value_synonym_fresh_id,
uint32_t variable_fresh_id, uint32_t variable_storage_class,
const protobufs::InstructionDescriptor& instruction_descriptor);
// - |message_.value_id| must be an instruction result id that has the same
// type as the pointee type of |message_.pointer_id|
// - |message_.value_synonym_id| must be fresh
// - |message_.variable_id| must be fresh
// - |message_.variable_storage_class| must be either StorageClassPrivate or
// StorageClassFunction
// - |message_.instruction_descriptor| must identify an instruction
// which it is valid to insert the OpStore and OpLoad instructions before it
// and must be belongs to a reachable block.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// Stores |value_id| to |variable_id|, loads |variable_id| to
// |value_synonym_id| and adds the fact that |value_synonym_id| and |value_id|
// are synonymous.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
protobufs::Transformation ToMessage() const override;
private:
protobufs::TransformationPushIdThroughVariable message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_PUSH_ID_THROUGH_VARIABLE_H_