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// Copyright (c) 2020 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_WRAP_EARLY_TERMINATOR_IN_FUNCTION_H_
#define SOURCE_FUZZ_TRANSFORMATION_WRAP_EARLY_TERMINATOR_IN_FUNCTION_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 TransformationWrapEarlyTerminatorInFunction : public Transformation {
public:
explicit TransformationWrapEarlyTerminatorInFunction(
protobufs::TransformationWrapEarlyTerminatorInFunction message);
TransformationWrapEarlyTerminatorInFunction(
uint32_t fresh_id,
const protobufs::InstructionDescriptor& early_terminator_instruction,
uint32_t returned_value_id);
// - |message_.fresh_id| must be fresh.
// - |message_.early_terminator_instruction| must identify an early terminator
// instruction, i.e. an instruction with opcode OpKill, OpUnreachable or
// OpTerminateInvocation.
// - A suitable wrapper function for the early terminator must exist, and it
// must be distinct from the function containing
// |message_.early_terminator_instruction|.
// - If the enclosing function has non-void return type then
// |message_.returned_value_instruction| must be the id of an instruction of
// the return type that is available at the point of the early terminator
// instruction.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// An OpFunctionCall instruction to an appropriate wrapper function is
// inserted before |message_.early_terminator_instruction|, and
// |message_.early_terminator_instruction| is replaced with either OpReturn
// or OpReturnValue |message_.returned_value_instruction| depending on whether
// the enclosing function's return type is void.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
static opt::Function* MaybeGetWrapperFunction(opt::IRContext* ir_context,
SpvOp early_terminator_opcode);
private:
protobufs::TransformationWrapEarlyTerminatorInFunction message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_WRAP_EARLY_TERMINATOR_IN_FUNCTION_H_
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