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// 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_INLINE_FUNCTION_H_
#define SOURCE_FUZZ_TRANSFORMATION_INLINE_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 TransformationInlineFunction : public Transformation {
public:
explicit TransformationInlineFunction(
protobufs::TransformationInlineFunction message);
TransformationInlineFunction(
uint32_t function_call_id,
const std::map<uint32_t, uint32_t>& result_id_map);
// - |message_.result_id_map| must map the instructions of the called function
// to fresh ids, unless overflow ids are available.
// - |message_.function_call_id| must be an OpFunctionCall instruction.
// It must not have an early return and must not use OpUnreachable or
// OpKill. This is to guard against making the module invalid when the
// caller is inside a continue construct.
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/3735):
// Allow functions that use OpKill or OpUnreachable to be inlined if the
// function call is not part of a continue construct.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// Replaces the OpFunctionCall instruction, identified by
// |message_.function_call_id|, with a copy of the function's body.
// |message_.result_id_map| is used to provide fresh ids for duplicate
// instructions.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
// Returns true if |function_call_instruction| is defined, is an
// OpFunctionCall instruction, has no uses if its return type is void, has no
// early returns and has no uses of OpKill or OpUnreachable.
static bool IsSuitableForInlining(
opt::IRContext* ir_context, opt::Instruction* function_call_instruction);
private:
protobufs::TransformationInlineFunction message_;
// Inline |instruction_to_be_inlined| by setting its ids to the corresponding
// ids in |result_id_map|.
void AdaptInlinedInstruction(
const std::map<uint32_t, uint32_t>& result_id_map,
opt::IRContext* ir_context, opt::Instruction* instruction) const;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_INLINE_FUNCTION_H_
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