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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
#define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
#include "instruction_set.h"
#include "memory_region.h"
#include "nodes.h"
#include "utils/assembler.h"
namespace art {
class CodeAllocator {
public:
CodeAllocator() { }
virtual ~CodeAllocator() { }
virtual uint8_t* Allocate(size_t size) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(CodeAllocator);
};
class CodeGenerator : public HGraphVisitor {
public:
// Compiles the graph to executable instructions. Returns whether the compilation
// succeeded.
static bool CompileGraph(
HGraph* graph, InstructionSet instruction_set, CodeAllocator* allocator);
Assembler* assembler() const { return assembler_; }
// Visit functions for instruction classes.
#define DECLARE_VISIT_INSTRUCTION(name) \
virtual void Visit##name(H##name* instr) = 0;
FOR_EACH_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
#undef DECLARE_VISIT_INSTRUCTION
protected:
CodeGenerator(Assembler* assembler, HGraph* graph)
: HGraphVisitor(graph), assembler_(assembler), block_labels_(graph->arena(), 0) {
block_labels_.SetSize(graph->blocks()->Size());
}
Label* GetLabelOf(HBasicBlock* block) const;
bool GoesToNextBlock(HGoto* got) const;
private:
virtual void GenerateFrameEntry() = 0;
virtual void GenerateFrameExit() = 0;
virtual void Bind(Label* label) = 0;
void Compile(CodeAllocator* allocator);
void CompileBlock(HBasicBlock* block);
Assembler* const assembler_;
// Labels for each block that will be compiled.
GrowableArray<Label> block_labels_;
DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
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