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// 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_SET_MEMORY_OPERANDS_MASK_H_
#define SOURCE_FUZZ_TRANSFORMATION_SET_MEMORY_OPERANDS_MASK_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 TransformationSetMemoryOperandsMask : public Transformation {
public:
explicit TransformationSetMemoryOperandsMask(
protobufs::TransformationSetMemoryOperandsMask message);
TransformationSetMemoryOperandsMask(
const protobufs::InstructionDescriptor& memory_access_instruction,
uint32_t memory_operands_mask, uint32_t memory_operands_mask_index);
// - |message_.memory_access_instruction| must describe a memory access
// instruction.
// - |message_.memory_operands_mask_index| must be suitable for this memory
// access instruction, e.g. it must be 0 in the case of OpLoad, and may be
// 1 in the case of OpCopyMemory if the SPIR-V version is 1.4 or higher.
// - |message_.memory_operands_mask| must be identical to the original memory
// operands mask, except that Volatile may be added, and Nontemporal may be
// toggled.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// Replaces the operands mask identified by
// |message_.memory_operands_mask_index| in the instruction described by
// |message_.memory_access_instruction| with |message_.memory_operands_mask|,
// creating an input operand for the mask if no such operand was present.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
// Helper function that determines whether |instruction| is a memory
// instruction (e.g. OpLoad).
static bool IsMemoryAccess(const opt::Instruction& instruction);
// Does the version of SPIR-V being used support multiple memory operand
// masks on relevant memory access instructions?
static bool MultipleMemoryOperandMasksAreSupported(
opt::IRContext* ir_context);
// Helper function to get the input operand index associated with mask number
// |mask_index|. This is a bit tricky if there are multiple masks, because the
// index associated with the second mask depends on whether the first mask
// includes any flags such as Aligned that have corresponding operands.
static uint32_t GetInOperandIndexForMask(const opt::Instruction& instruction,
uint32_t mask_index);
private:
protobufs::TransformationSetMemoryOperandsMask message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_SET_MEMORY_OPERANDS_MASK_H_
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