compiler/optimizing/code_generator_mips.h - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2015 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_MIPS_H_
 #define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_MIPS_H_

 #include "code_generator.h"
 #include "dex/compiler_enums.h"
 #include "driver/compiler_options.h"
 #include "nodes.h"
 #include "parallel_move_resolver.h"
 #include "utils/mips/assembler_mips.h"

 namespace art {
 namespace mips {

 // InvokeDexCallingConvention registers

 static constexpr Register kParameterCoreRegisters[] =
     { A1, A2, A3 };
 static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);

 static constexpr FRegister kParameterFpuRegisters[] =
     { F12, F14 };
 static constexpr size_t kParameterFpuRegistersLength = arraysize(kParameterFpuRegisters);


 // InvokeRuntimeCallingConvention registers

 static constexpr Register kRuntimeParameterCoreRegisters[] =
     { A0, A1, A2, A3 };
 static constexpr size_t kRuntimeParameterCoreRegistersLength =
     arraysize(kRuntimeParameterCoreRegisters);

 static constexpr FRegister kRuntimeParameterFpuRegisters[] =
     { F12, F14};
 static constexpr size_t kRuntimeParameterFpuRegistersLength =
     arraysize(kRuntimeParameterFpuRegisters);


 static constexpr Register kCoreCalleeSaves[] =
     { S0, S1, S2, S3, S4, S5, S6, S7, FP, RA };
 static constexpr FRegister kFpuCalleeSaves[] =
     { F20, F22, F24, F26, F28, F30 };


 class CodeGeneratorMIPS;

 class InvokeDexCallingConvention : public CallingConvention<Register, FRegister> {
  public:
   InvokeDexCallingConvention()
       : CallingConvention(kParameterCoreRegisters,
                           kParameterCoreRegistersLength,
                           kParameterFpuRegisters,
                           kParameterFpuRegistersLength,
                           kMipsPointerSize) {}

  private:
   DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
 };

 class InvokeDexCallingConventionVisitorMIPS : public InvokeDexCallingConventionVisitor {
  public:
   InvokeDexCallingConventionVisitorMIPS() {}
   virtual ~InvokeDexCallingConventionVisitorMIPS() {}

   Location GetNextLocation(Primitive::Type type) OVERRIDE;
   Location GetReturnLocation(Primitive::Type type) const OVERRIDE;
   Location GetMethodLocation() const OVERRIDE;

  private:
   InvokeDexCallingConvention calling_convention;

   DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitorMIPS);
 };

 class InvokeRuntimeCallingConvention : public CallingConvention<Register, FRegister> {
  public:
   InvokeRuntimeCallingConvention()
       : CallingConvention(kRuntimeParameterCoreRegisters,
                           kRuntimeParameterCoreRegistersLength,
                           kRuntimeParameterFpuRegisters,
                           kRuntimeParameterFpuRegistersLength,
                           kMipsPointerSize) {}

   Location GetReturnLocation(Primitive::Type return_type);

  private:
   DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConvention);
 };

 class FieldAccessCallingConventionMIPS : public FieldAccessCallingConvention {
  public:
   FieldAccessCallingConventionMIPS() {}

   Location GetObjectLocation() const OVERRIDE {
     return Location::RegisterLocation(A1);
   }
   Location GetFieldIndexLocation() const OVERRIDE {
     return Location::RegisterLocation(A0);
   }
   Location GetReturnLocation(Primitive::Type type) const OVERRIDE {
     return Primitive::Is64BitType(type)
         ? Location::RegisterPairLocation(V0, V1)
         : Location::RegisterLocation(V0);
   }
   Location GetSetValueLocation(Primitive::Type type, bool is_instance) const OVERRIDE {
     return Primitive::Is64BitType(type)
         ? Location::RegisterPairLocation(A2, A3)
         : (is_instance ? Location::RegisterLocation(A2) : Location::RegisterLocation(A1));
   }
   Location GetFpuLocation(Primitive::Type type ATTRIBUTE_UNUSED) const OVERRIDE {
     return Location::FpuRegisterLocation(F0);
   }

  private:
   DISALLOW_COPY_AND_ASSIGN(FieldAccessCallingConventionMIPS);
 };

 class ParallelMoveResolverMIPS : public ParallelMoveResolverWithSwap {
  public:
   ParallelMoveResolverMIPS(ArenaAllocator* allocator, CodeGeneratorMIPS* codegen)
       : ParallelMoveResolverWithSwap(allocator), codegen_(codegen) {}

   void EmitMove(size_t index) OVERRIDE;
   void EmitSwap(size_t index) OVERRIDE;
   void SpillScratch(int reg) OVERRIDE;
   void RestoreScratch(int reg) OVERRIDE;

   void Exchange(int index1, int index2, bool double_slot);

   MipsAssembler* GetAssembler() const;

  private:
   CodeGeneratorMIPS* const codegen_;

   DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverMIPS);
 };

 class SlowPathCodeMIPS : public SlowPathCode {
  public:
   SlowPathCodeMIPS() : entry_label_(), exit_label_() {}

   MipsLabel* GetEntryLabel() { return &entry_label_; }
   MipsLabel* GetExitLabel() { return &exit_label_; }

  private:
   MipsLabel entry_label_;
   MipsLabel exit_label_;

   DISALLOW_COPY_AND_ASSIGN(SlowPathCodeMIPS);
 };

 class LocationsBuilderMIPS : public HGraphVisitor {
  public:
   LocationsBuilderMIPS(HGraph* graph, CodeGeneratorMIPS* codegen)
       : HGraphVisitor(graph), codegen_(codegen) {}

 #define DECLARE_VISIT_INSTRUCTION(name, super)     \
   void Visit##name(H##name* instr) OVERRIDE;

   FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
   FOR_EACH_CONCRETE_INSTRUCTION_MIPS(DECLARE_VISIT_INSTRUCTION)

 #undef DECLARE_VISIT_INSTRUCTION

   void VisitInstruction(HInstruction* instruction) OVERRIDE {
     LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
                << " (id " << instruction->GetId() << ")";
   }

  private:
   void HandleInvoke(HInvoke* invoke);
   void HandleBinaryOp(HBinaryOperation* operation);
   void HandleShift(HBinaryOperation* operation);
   void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
   void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);

   InvokeDexCallingConventionVisitorMIPS parameter_visitor_;

   CodeGeneratorMIPS* const codegen_;

   DISALLOW_COPY_AND_ASSIGN(LocationsBuilderMIPS);
 };

 class InstructionCodeGeneratorMIPS : public HGraphVisitor {
  public:
   InstructionCodeGeneratorMIPS(HGraph* graph, CodeGeneratorMIPS* codegen);

 #define DECLARE_VISIT_INSTRUCTION(name, super)     \
   void Visit##name(H##name* instr) OVERRIDE;

   FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
   FOR_EACH_CONCRETE_INSTRUCTION_MIPS(DECLARE_VISIT_INSTRUCTION)

 #undef DECLARE_VISIT_INSTRUCTION

   void VisitInstruction(HInstruction* instruction) OVERRIDE {
     LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
                << " (id " << instruction->GetId() << ")";
   }

   MipsAssembler* GetAssembler() const { return assembler_; }

  private:
   void GenerateClassInitializationCheck(SlowPathCodeMIPS* slow_path, Register class_reg);
   void GenerateMemoryBarrier(MemBarrierKind kind);
   void GenerateSuspendCheck(HSuspendCheck* check, HBasicBlock* successor);
   void HandleBinaryOp(HBinaryOperation* operation);
   void HandleShift(HBinaryOperation* operation);
   void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info, uint32_t dex_pc);
   void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info, uint32_t dex_pc);
   void GenerateImplicitNullCheck(HNullCheck* instruction);
   void GenerateExplicitNullCheck(HNullCheck* instruction);
   void GenerateTestAndBranch(HInstruction* instruction,
                              size_t condition_input_index,
                              MipsLabel* true_target,
                              MipsLabel* false_target);
   void DivRemOneOrMinusOne(HBinaryOperation* instruction);
   void DivRemByPowerOfTwo(HBinaryOperation* instruction);
   void GenerateDivRemWithAnyConstant(HBinaryOperation* instruction);
   void GenerateDivRemIntegral(HBinaryOperation* instruction);
   void HandleGoto(HInstruction* got, HBasicBlock* successor);

   MipsAssembler* const assembler_;
   CodeGeneratorMIPS* const codegen_;

   DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorMIPS);
 };

 class CodeGeneratorMIPS : public CodeGenerator {
  public:
   CodeGeneratorMIPS(HGraph* graph,
                     const MipsInstructionSetFeatures& isa_features,
                     const CompilerOptions& compiler_options,
                     OptimizingCompilerStats* stats = nullptr);
   virtual ~CodeGeneratorMIPS() {}

   void GenerateFrameEntry() OVERRIDE;
   void GenerateFrameExit() OVERRIDE;

   void Bind(HBasicBlock* block) OVERRIDE;

   void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
   void Move32(Location destination, Location source);
   void Move64(Location destination, Location source);
   void MoveConstant(Location location, HConstant* c);

   size_t GetWordSize() const OVERRIDE { return kMipsWordSize; }

   size_t GetFloatingPointSpillSlotSize() const OVERRIDE { return kMipsDoublewordSize; }

   uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
     return assembler_.GetLabelLocation(GetLabelOf(block));
   }

   HGraphVisitor* GetLocationBuilder() OVERRIDE { return &location_builder_; }
   HGraphVisitor* GetInstructionVisitor() OVERRIDE { return &instruction_visitor_; }
   MipsAssembler* GetAssembler() OVERRIDE { return &assembler_; }
   const MipsAssembler& GetAssembler() const OVERRIDE { return assembler_; }

   void MarkGCCard(Register object, Register value);

   // Register allocation.

   void SetupBlockedRegisters(bool is_baseline) const OVERRIDE;
   // AllocateFreeRegister() is only used when allocating registers locally
   // during CompileBaseline().
   Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;

   Location GetStackLocation(HLoadLocal* load) const OVERRIDE;

   size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id);
   size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id);
   size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id);
   size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id);

   void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
   void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;

   // Blocks all register pairs made out of blocked core registers.
   void UpdateBlockedPairRegisters() const;

   InstructionSet GetInstructionSet() const OVERRIDE { return InstructionSet::kMips; }

   const MipsInstructionSetFeatures& GetInstructionSetFeatures() const {
     return isa_features_;
   }

   MipsLabel* GetLabelOf(HBasicBlock* block) const {
     return CommonGetLabelOf<MipsLabel>(block_labels_, block);
   }

   void Initialize() OVERRIDE {
     block_labels_ = CommonInitializeLabels<MipsLabel>();
   }

   void Finalize(CodeAllocator* allocator) OVERRIDE;

   // Code generation helpers.

   void MoveLocation(Location dst, Location src, Primitive::Type dst_type) OVERRIDE;

   void MoveConstant(Location destination, int32_t value);

   void AddLocationAsTemp(Location location, LocationSummary* locations) OVERRIDE;

   // Generate code to invoke a runtime entry point.
   void InvokeRuntime(QuickEntrypointEnum entrypoint,
                      HInstruction* instruction,
                      uint32_t dex_pc,
                      SlowPathCode* slow_path) OVERRIDE;

   void InvokeRuntime(int32_t offset,
                      HInstruction* instruction,
                      uint32_t dex_pc,
                      SlowPathCode* slow_path,
                      bool is_direct_entrypoint);

   ParallelMoveResolver* GetMoveResolver() OVERRIDE { return &move_resolver_; }

   bool NeedsTwoRegisters(Primitive::Type type) const {
     return type == Primitive::kPrimLong;
   }

   // Check if the desired_dispatch_info is supported. If it is, return it,
   // otherwise return a fall-back info that should be used instead.
   HInvokeStaticOrDirect::DispatchInfo GetSupportedInvokeStaticOrDirectDispatch(
       const HInvokeStaticOrDirect::DispatchInfo& desired_dispatch_info,
       MethodReference target_method) OVERRIDE;

   void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, Location temp);
   void GenerateVirtualCall(HInvokeVirtual* invoke ATTRIBUTE_UNUSED,
                            Location temp ATTRIBUTE_UNUSED) OVERRIDE {
     UNIMPLEMENTED(FATAL) << "Not implemented on MIPS";
   }

   void MoveFromReturnRegister(Location trg ATTRIBUTE_UNUSED,
                               Primitive::Type type ATTRIBUTE_UNUSED) OVERRIDE {
     UNIMPLEMENTED(FATAL) << "Not implemented on MIPS";
   }

  private:
   // Labels for each block that will be compiled.
   MipsLabel* block_labels_;
   MipsLabel frame_entry_label_;
   LocationsBuilderMIPS location_builder_;
   InstructionCodeGeneratorMIPS instruction_visitor_;
   ParallelMoveResolverMIPS move_resolver_;
   MipsAssembler assembler_;
   const MipsInstructionSetFeatures& isa_features_;

   DISALLOW_COPY_AND_ASSIGN(CodeGeneratorMIPS);
 };

 }  // namespace mips
 }  // namespace art

 #endif  // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_MIPS_H_
	/*
	* Copyright (C) 2015 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_MIPS_H_
	#define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_MIPS_H_

	#include "code_generator.h"
	#include "dex/compiler_enums.h"
	#include "driver/compiler_options.h"
	#include "nodes.h"
	#include "parallel_move_resolver.h"
	#include "utils/mips/assembler_mips.h"

	namespace art {
	namespace mips {

	// InvokeDexCallingConvention registers

	static constexpr Register kParameterCoreRegisters[] =
	{ A1, A2, A3 };
	static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);

	static constexpr FRegister kParameterFpuRegisters[] =
	{ F12, F14 };
	static constexpr size_t kParameterFpuRegistersLength = arraysize(kParameterFpuRegisters);


	// InvokeRuntimeCallingConvention registers

	static constexpr Register kRuntimeParameterCoreRegisters[] =
	{ A0, A1, A2, A3 };
	static constexpr size_t kRuntimeParameterCoreRegistersLength =
	arraysize(kRuntimeParameterCoreRegisters);

	static constexpr FRegister kRuntimeParameterFpuRegisters[] =
	{ F12, F14};
	static constexpr size_t kRuntimeParameterFpuRegistersLength =
	arraysize(kRuntimeParameterFpuRegisters);


	static constexpr Register kCoreCalleeSaves[] =
	{ S0, S1, S2, S3, S4, S5, S6, S7, FP, RA };
	static constexpr FRegister kFpuCalleeSaves[] =
	{ F20, F22, F24, F26, F28, F30 };


	class CodeGeneratorMIPS;

	class InvokeDexCallingConvention : public CallingConvention<Register, FRegister> {
	public:
	InvokeDexCallingConvention()
	: CallingConvention(kParameterCoreRegisters,
	kParameterCoreRegistersLength,
	kParameterFpuRegisters,
	kParameterFpuRegistersLength,
	kMipsPointerSize) {}

	private:
	DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
	};

	class InvokeDexCallingConventionVisitorMIPS : public InvokeDexCallingConventionVisitor {
	public:
	InvokeDexCallingConventionVisitorMIPS() {}
	virtual ~InvokeDexCallingConventionVisitorMIPS() {}

	Location GetNextLocation(Primitive::Type type) OVERRIDE;
	Location GetReturnLocation(Primitive::Type type) const OVERRIDE;
	Location GetMethodLocation() const OVERRIDE;

	private:
	InvokeDexCallingConvention calling_convention;

	DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitorMIPS);
	};

	class InvokeRuntimeCallingConvention : public CallingConvention<Register, FRegister> {
	public:
	InvokeRuntimeCallingConvention()
	: CallingConvention(kRuntimeParameterCoreRegisters,
	kRuntimeParameterCoreRegistersLength,
	kRuntimeParameterFpuRegisters,
	kRuntimeParameterFpuRegistersLength,
	kMipsPointerSize) {}

	Location GetReturnLocation(Primitive::Type return_type);

	private:
	DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConvention);
	};

	class FieldAccessCallingConventionMIPS : public FieldAccessCallingConvention {
	public:
	FieldAccessCallingConventionMIPS() {}

	Location GetObjectLocation() const OVERRIDE {
	return Location::RegisterLocation(A1);
	}
	Location GetFieldIndexLocation() const OVERRIDE {
	return Location::RegisterLocation(A0);
	}
	Location GetReturnLocation(Primitive::Type type) const OVERRIDE {
	return Primitive::Is64BitType(type)
	? Location::RegisterPairLocation(V0, V1)
	: Location::RegisterLocation(V0);
	}
	Location GetSetValueLocation(Primitive::Type type, bool is_instance) const OVERRIDE {
	return Primitive::Is64BitType(type)
	? Location::RegisterPairLocation(A2, A3)
	: (is_instance ? Location::RegisterLocation(A2) : Location::RegisterLocation(A1));
	}
	Location GetFpuLocation(Primitive::Type type ATTRIBUTE_UNUSED) const OVERRIDE {
	return Location::FpuRegisterLocation(F0);
	}

	private:
	DISALLOW_COPY_AND_ASSIGN(FieldAccessCallingConventionMIPS);
	};

	class ParallelMoveResolverMIPS : public ParallelMoveResolverWithSwap {
	public:
	ParallelMoveResolverMIPS(ArenaAllocator* allocator, CodeGeneratorMIPS* codegen)
	: ParallelMoveResolverWithSwap(allocator), codegen_(codegen) {}

	void EmitMove(size_t index) OVERRIDE;
	void EmitSwap(size_t index) OVERRIDE;
	void SpillScratch(int reg) OVERRIDE;
	void RestoreScratch(int reg) OVERRIDE;

	void Exchange(int index1, int index2, bool double_slot);

	MipsAssembler* GetAssembler() const;

	private:
	CodeGeneratorMIPS* const codegen_;

	DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverMIPS);
	};

	class SlowPathCodeMIPS : public SlowPathCode {
	public:
	SlowPathCodeMIPS() : entry_label_(), exit_label_() {}

	MipsLabel* GetEntryLabel() { return &entry_label_; }
	MipsLabel* GetExitLabel() { return &exit_label_; }

	private:
	MipsLabel entry_label_;
	MipsLabel exit_label_;

	DISALLOW_COPY_AND_ASSIGN(SlowPathCodeMIPS);
	};

	class LocationsBuilderMIPS : public HGraphVisitor {
	public:
	LocationsBuilderMIPS(HGraph* graph, CodeGeneratorMIPS* codegen)
	: HGraphVisitor(graph), codegen_(codegen) {}

	#define DECLARE_VISIT_INSTRUCTION(name, super) \
	void Visit##name(H##name* instr) OVERRIDE;

	FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
	FOR_EACH_CONCRETE_INSTRUCTION_MIPS(DECLARE_VISIT_INSTRUCTION)

	#undef DECLARE_VISIT_INSTRUCTION

	void VisitInstruction(HInstruction* instruction) OVERRIDE {
	LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
	<< " (id " << instruction->GetId() << ")";
	}

	private:
	void HandleInvoke(HInvoke* invoke);
	void HandleBinaryOp(HBinaryOperation* operation);
	void HandleShift(HBinaryOperation* operation);
	void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
	void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);

	InvokeDexCallingConventionVisitorMIPS parameter_visitor_;

	CodeGeneratorMIPS* const codegen_;

	DISALLOW_COPY_AND_ASSIGN(LocationsBuilderMIPS);
	};

	class InstructionCodeGeneratorMIPS : public HGraphVisitor {
	public:
	InstructionCodeGeneratorMIPS(HGraph* graph, CodeGeneratorMIPS* codegen);

	#define DECLARE_VISIT_INSTRUCTION(name, super) \
	void Visit##name(H##name* instr) OVERRIDE;

	FOR_EACH_CONCRETE_INSTRUCTION_COMMON(DECLARE_VISIT_INSTRUCTION)
	FOR_EACH_CONCRETE_INSTRUCTION_MIPS(DECLARE_VISIT_INSTRUCTION)

	#undef DECLARE_VISIT_INSTRUCTION

	void VisitInstruction(HInstruction* instruction) OVERRIDE {
	LOG(FATAL) << "Unreachable instruction " << instruction->DebugName()
	<< " (id " << instruction->GetId() << ")";
	}

	MipsAssembler* GetAssembler() const { return assembler_; }

	private:
	void GenerateClassInitializationCheck(SlowPathCodeMIPS* slow_path, Register class_reg);
	void GenerateMemoryBarrier(MemBarrierKind kind);
	void GenerateSuspendCheck(HSuspendCheck* check, HBasicBlock* successor);
	void HandleBinaryOp(HBinaryOperation* operation);
	void HandleShift(HBinaryOperation* operation);
	void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info, uint32_t dex_pc);
	void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info, uint32_t dex_pc);
	void GenerateImplicitNullCheck(HNullCheck* instruction);
	void GenerateExplicitNullCheck(HNullCheck* instruction);
	void GenerateTestAndBranch(HInstruction* instruction,
	size_t condition_input_index,
	MipsLabel* true_target,
	MipsLabel* false_target);
	void DivRemOneOrMinusOne(HBinaryOperation* instruction);
	void DivRemByPowerOfTwo(HBinaryOperation* instruction);
	void GenerateDivRemWithAnyConstant(HBinaryOperation* instruction);
	void GenerateDivRemIntegral(HBinaryOperation* instruction);
	void HandleGoto(HInstruction* got, HBasicBlock* successor);

	MipsAssembler* const assembler_;
	CodeGeneratorMIPS* const codegen_;

	DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorMIPS);
	};

	class CodeGeneratorMIPS : public CodeGenerator {
	public:
	CodeGeneratorMIPS(HGraph* graph,
	const MipsInstructionSetFeatures& isa_features,
	const CompilerOptions& compiler_options,
	OptimizingCompilerStats* stats = nullptr);
	virtual ~CodeGeneratorMIPS() {}

	void GenerateFrameEntry() OVERRIDE;
	void GenerateFrameExit() OVERRIDE;

	void Bind(HBasicBlock* block) OVERRIDE;

	void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
	void Move32(Location destination, Location source);
	void Move64(Location destination, Location source);
	void MoveConstant(Location location, HConstant* c);

	size_t GetWordSize() const OVERRIDE { return kMipsWordSize; }

	size_t GetFloatingPointSpillSlotSize() const OVERRIDE { return kMipsDoublewordSize; }

	uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
	return assembler_.GetLabelLocation(GetLabelOf(block));
	}

	HGraphVisitor* GetLocationBuilder() OVERRIDE { return &location_builder_; }
	HGraphVisitor* GetInstructionVisitor() OVERRIDE { return &instruction_visitor_; }
	MipsAssembler* GetAssembler() OVERRIDE { return &assembler_; }
	const MipsAssembler& GetAssembler() const OVERRIDE { return assembler_; }

	void MarkGCCard(Register object, Register value);

	// Register allocation.

	void SetupBlockedRegisters(bool is_baseline) const OVERRIDE;
	// AllocateFreeRegister() is only used when allocating registers locally
	// during CompileBaseline().
	Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;

	Location GetStackLocation(HLoadLocal* load) const OVERRIDE;

	size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id);
	size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id);
	size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id);
	size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id);

	void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
	void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;

	// Blocks all register pairs made out of blocked core registers.
	void UpdateBlockedPairRegisters() const;

	InstructionSet GetInstructionSet() const OVERRIDE { return InstructionSet::kMips; }

	const MipsInstructionSetFeatures& GetInstructionSetFeatures() const {
	return isa_features_;
	}

	MipsLabel* GetLabelOf(HBasicBlock* block) const {
	return CommonGetLabelOf<MipsLabel>(block_labels_, block);
	}

	void Initialize() OVERRIDE {
	block_labels_ = CommonInitializeLabels<MipsLabel>();
	}

	void Finalize(CodeAllocator* allocator) OVERRIDE;

	// Code generation helpers.

	void MoveLocation(Location dst, Location src, Primitive::Type dst_type) OVERRIDE;

	void MoveConstant(Location destination, int32_t value);

	void AddLocationAsTemp(Location location, LocationSummary* locations) OVERRIDE;

	// Generate code to invoke a runtime entry point.
	void InvokeRuntime(QuickEntrypointEnum entrypoint,
	HInstruction* instruction,
	uint32_t dex_pc,
	SlowPathCode* slow_path) OVERRIDE;

	void InvokeRuntime(int32_t offset,
	HInstruction* instruction,
	uint32_t dex_pc,
	SlowPathCode* slow_path,
	bool is_direct_entrypoint);

	ParallelMoveResolver* GetMoveResolver() OVERRIDE { return &move_resolver_; }

	bool NeedsTwoRegisters(Primitive::Type type) const {
	return type == Primitive::kPrimLong;
	}

	// Check if the desired_dispatch_info is supported. If it is, return it,
	// otherwise return a fall-back info that should be used instead.
	HInvokeStaticOrDirect::DispatchInfo GetSupportedInvokeStaticOrDirectDispatch(
	const HInvokeStaticOrDirect::DispatchInfo& desired_dispatch_info,
	MethodReference target_method) OVERRIDE;

	void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, Location temp);
	void GenerateVirtualCall(HInvokeVirtual* invoke ATTRIBUTE_UNUSED,
	Location temp ATTRIBUTE_UNUSED) OVERRIDE {
	UNIMPLEMENTED(FATAL) << "Not implemented on MIPS";
	}

	void MoveFromReturnRegister(Location trg ATTRIBUTE_UNUSED,
	Primitive::Type type ATTRIBUTE_UNUSED) OVERRIDE {
	UNIMPLEMENTED(FATAL) << "Not implemented on MIPS";
	}

	private:
	// Labels for each block that will be compiled.
	MipsLabel* block_labels_;
	MipsLabel frame_entry_label_;
	LocationsBuilderMIPS location_builder_;
	InstructionCodeGeneratorMIPS instruction_visitor_;
	ParallelMoveResolverMIPS move_resolver_;
	MipsAssembler assembler_;
	const MipsInstructionSetFeatures& isa_features_;

	DISALLOW_COPY_AND_ASSIGN(CodeGeneratorMIPS);
	};

	} // namespace mips
	} // namespace art

	#endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_MIPS_H_