compiler/optimizing/code_generator_arm.h - platform/art - Git at Google

 /*
  * 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_ARM_H_
 #define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM_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/arm/assembler_thumb2.h"

 namespace art {
 namespace arm {

 class CodeGeneratorARM;
 class SlowPathCodeARM;

 // Use a local definition to prevent copying mistakes.
 static constexpr size_t kArmWordSize = kArmPointerSize;

 static constexpr Register kParameterCoreRegisters[] = { R1, R2, R3 };
 static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);
 static constexpr SRegister kParameterFpuRegisters[] =
     { S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15 };
 static constexpr size_t kParameterFpuRegistersLength = arraysize(kParameterFpuRegisters);

 static constexpr Register kArtMethodRegister = R0;

 static constexpr DRegister FromLowSToD(SRegister reg) {
   return DCHECK_CONSTEXPR(reg % 2 == 0, , D0)
       static_cast<DRegister>(reg / 2);
 }


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

  private:
   DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
 };

 class InvokeDexCallingConventionVisitor {
  public:
   InvokeDexCallingConventionVisitor()
       : gp_index_(0), float_index_(0), double_index_(0), stack_index_(0) {}

   Location GetNextLocation(Primitive::Type type);
   Location GetReturnLocation(Primitive::Type type);

  private:
   InvokeDexCallingConvention calling_convention;
   uint32_t gp_index_;
   uint32_t float_index_;
   uint32_t double_index_;
   uint32_t stack_index_;

   DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitor);
 };

 class ParallelMoveResolverARM : public ParallelMoveResolver {
  public:
   ParallelMoveResolverARM(ArenaAllocator* allocator, CodeGeneratorARM* codegen)
       : ParallelMoveResolver(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;

   ArmAssembler* GetAssembler() const;

  private:
   void Exchange(Register reg, int mem);
   void Exchange(int mem1, int mem2);

   CodeGeneratorARM* const codegen_;

   DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverARM);
 };

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

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

  private:
   Label entry_label_;
   Label exit_label_;

   DISALLOW_COPY_AND_ASSIGN(SlowPathCodeARM);
 };

 class LocationsBuilderARM : public HGraphVisitor {
  public:
   LocationsBuilderARM(HGraph* graph, CodeGeneratorARM* codegen)
       : HGraphVisitor(graph), codegen_(codegen) {}

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

   FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

 #undef DECLARE_VISIT_INSTRUCTION

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

   CodeGeneratorARM* const codegen_;
   InvokeDexCallingConventionVisitor parameter_visitor_;

   DISALLOW_COPY_AND_ASSIGN(LocationsBuilderARM);
 };

 class InstructionCodeGeneratorARM : public HGraphVisitor {
  public:
   InstructionCodeGeneratorARM(HGraph* graph, CodeGeneratorARM* codegen);

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

   FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

 #undef DECLARE_VISIT_INSTRUCTION

   ArmAssembler* GetAssembler() const { return assembler_; }

  private:
   // Generate code for the given suspend check. If not null, `successor`
   // is the block to branch to if the suspend check is not needed, and after
   // the suspend call.
   void GenerateSuspendCheck(HSuspendCheck* check, HBasicBlock* successor);
   void GenerateClassInitializationCheck(SlowPathCodeARM* slow_path, Register class_reg);
   void HandleBitwiseOperation(HBinaryOperation* operation);
   void HandleShift(HBinaryOperation* operation);
   void GenerateMemoryBarrier(MemBarrierKind kind);
   void GenerateWideAtomicStore(Register addr, uint32_t offset,
                                Register value_lo, Register value_hi,
                                Register temp1, Register temp2,
                                HInstruction* instruction);
   void GenerateWideAtomicLoad(Register addr, uint32_t offset,
                               Register out_lo, Register out_hi);
   void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
   void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
   void GenerateImplicitNullCheck(HNullCheck* instruction);
   void GenerateExplicitNullCheck(HNullCheck* instruction);

   ArmAssembler* const assembler_;
   CodeGeneratorARM* const codegen_;

   DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorARM);
 };

 class CodeGeneratorARM : public CodeGenerator {
  public:
   CodeGeneratorARM(HGraph* graph,
                    const ArmInstructionSetFeatures& isa_features,
                    const CompilerOptions& compiler_options);
   virtual ~CodeGeneratorARM() {}

   void GenerateFrameEntry() OVERRIDE;
   void GenerateFrameExit() OVERRIDE;
   void Bind(HBasicBlock* block) OVERRIDE;
   void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
   size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
   size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
   size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
   size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;

   size_t GetWordSize() const OVERRIDE {
     return kArmWordSize;
   }

   size_t GetFloatingPointSpillSlotSize() const OVERRIDE {
     // Allocated in S registers, which are word sized.
     return kArmWordSize;
   }

   HGraphVisitor* GetLocationBuilder() OVERRIDE {
     return &location_builder_;
   }

   HGraphVisitor* GetInstructionVisitor() OVERRIDE {
     return &instruction_visitor_;
   }

   ArmAssembler* GetAssembler() OVERRIDE {
     return &assembler_;
   }

   uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
     return GetLabelOf(block)->Position();
   }

   void SetupBlockedRegisters(bool is_baseline) const OVERRIDE;

   Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;

   Location GetStackLocation(HLoadLocal* load) const OVERRIDE;

   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;

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

   InstructionSet GetInstructionSet() const OVERRIDE {
     return InstructionSet::kThumb2;
   }

   // Helper method to move a 32bits value between two locations.
   void Move32(Location destination, Location source);
   // Helper method to move a 64bits value between two locations.
   void Move64(Location destination, Location source);

   // Load current method into `reg`.
   void LoadCurrentMethod(Register reg);

   // Generate code to invoke a runtime entry point.
   void InvokeRuntime(
       int32_t offset, HInstruction* instruction, uint32_t dex_pc, SlowPathCode* slow_path);

   // Emit a write barrier.
   void MarkGCCard(Register temp, Register card, Register object, Register value);

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

   void Initialize() OVERRIDE {
     block_labels_.SetSize(GetGraph()->GetBlocks().Size());
   }

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

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

   void ComputeSpillMask() OVERRIDE;

   Label* GetFrameEntryLabel() { return &frame_entry_label_; }

   void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, Register temp);

  private:
   // Labels for each block that will be compiled.
   GrowableArray<Label> block_labels_;
   Label frame_entry_label_;
   LocationsBuilderARM location_builder_;
   InstructionCodeGeneratorARM instruction_visitor_;
   ParallelMoveResolverARM move_resolver_;
   Thumb2Assembler assembler_;
   const ArmInstructionSetFeatures& isa_features_;

   DISALLOW_COPY_AND_ASSIGN(CodeGeneratorARM);
 };

 }  // namespace arm
 }  // namespace art

 #endif  // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM_H_
	/*
	* 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_ARM_H_
	#define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM_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/arm/assembler_thumb2.h"

	namespace art {
	namespace arm {

	class CodeGeneratorARM;
	class SlowPathCodeARM;

	// Use a local definition to prevent copying mistakes.
	static constexpr size_t kArmWordSize = kArmPointerSize;

	static constexpr Register kParameterCoreRegisters[] = { R1, R2, R3 };
	static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);
	static constexpr SRegister kParameterFpuRegisters[] =
	{ S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15 };
	static constexpr size_t kParameterFpuRegistersLength = arraysize(kParameterFpuRegisters);

	static constexpr Register kArtMethodRegister = R0;

	static constexpr DRegister FromLowSToD(SRegister reg) {
	return DCHECK_CONSTEXPR(reg % 2 == 0, , D0)
	static_cast<DRegister>(reg / 2);
	}


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

	private:
	DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
	};

	class InvokeDexCallingConventionVisitor {
	public:
	InvokeDexCallingConventionVisitor()
	: gp_index_(0), float_index_(0), double_index_(0), stack_index_(0) {}

	Location GetNextLocation(Primitive::Type type);
	Location GetReturnLocation(Primitive::Type type);

	private:
	InvokeDexCallingConvention calling_convention;
	uint32_t gp_index_;
	uint32_t float_index_;
	uint32_t double_index_;
	uint32_t stack_index_;

	DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitor);
	};

	class ParallelMoveResolverARM : public ParallelMoveResolver {
	public:
	ParallelMoveResolverARM(ArenaAllocator* allocator, CodeGeneratorARM* codegen)
	: ParallelMoveResolver(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;

	ArmAssembler* GetAssembler() const;

	private:
	void Exchange(Register reg, int mem);
	void Exchange(int mem1, int mem2);

	CodeGeneratorARM* const codegen_;

	DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverARM);
	};

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

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

	private:
	Label entry_label_;
	Label exit_label_;

	DISALLOW_COPY_AND_ASSIGN(SlowPathCodeARM);
	};

	class LocationsBuilderARM : public HGraphVisitor {
	public:
	LocationsBuilderARM(HGraph* graph, CodeGeneratorARM* codegen)
	: HGraphVisitor(graph), codegen_(codegen) {}

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

	FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

	#undef DECLARE_VISIT_INSTRUCTION

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

	CodeGeneratorARM* const codegen_;
	InvokeDexCallingConventionVisitor parameter_visitor_;

	DISALLOW_COPY_AND_ASSIGN(LocationsBuilderARM);
	};

	class InstructionCodeGeneratorARM : public HGraphVisitor {
	public:
	InstructionCodeGeneratorARM(HGraph* graph, CodeGeneratorARM* codegen);

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

	FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

	#undef DECLARE_VISIT_INSTRUCTION

	ArmAssembler* GetAssembler() const { return assembler_; }

	private:
	// Generate code for the given suspend check. If not null, `successor`
	// is the block to branch to if the suspend check is not needed, and after
	// the suspend call.
	void GenerateSuspendCheck(HSuspendCheck* check, HBasicBlock* successor);
	void GenerateClassInitializationCheck(SlowPathCodeARM* slow_path, Register class_reg);
	void HandleBitwiseOperation(HBinaryOperation* operation);
	void HandleShift(HBinaryOperation* operation);
	void GenerateMemoryBarrier(MemBarrierKind kind);
	void GenerateWideAtomicStore(Register addr, uint32_t offset,
	Register value_lo, Register value_hi,
	Register temp1, Register temp2,
	HInstruction* instruction);
	void GenerateWideAtomicLoad(Register addr, uint32_t offset,
	Register out_lo, Register out_hi);
	void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
	void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
	void GenerateImplicitNullCheck(HNullCheck* instruction);
	void GenerateExplicitNullCheck(HNullCheck* instruction);

	ArmAssembler* const assembler_;
	CodeGeneratorARM* const codegen_;

	DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorARM);
	};

	class CodeGeneratorARM : public CodeGenerator {
	public:
	CodeGeneratorARM(HGraph* graph,
	const ArmInstructionSetFeatures& isa_features,
	const CompilerOptions& compiler_options);
	virtual ~CodeGeneratorARM() {}

	void GenerateFrameEntry() OVERRIDE;
	void GenerateFrameExit() OVERRIDE;
	void Bind(HBasicBlock* block) OVERRIDE;
	void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
	size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
	size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
	size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
	size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;

	size_t GetWordSize() const OVERRIDE {
	return kArmWordSize;
	}

	size_t GetFloatingPointSpillSlotSize() const OVERRIDE {
	// Allocated in S registers, which are word sized.
	return kArmWordSize;
	}

	HGraphVisitor* GetLocationBuilder() OVERRIDE {
	return &location_builder_;
	}

	HGraphVisitor* GetInstructionVisitor() OVERRIDE {
	return &instruction_visitor_;
	}

	ArmAssembler* GetAssembler() OVERRIDE {
	return &assembler_;
	}

	uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
	return GetLabelOf(block)->Position();
	}

	void SetupBlockedRegisters(bool is_baseline) const OVERRIDE;

	Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;

	Location GetStackLocation(HLoadLocal* load) const OVERRIDE;

	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;

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

	InstructionSet GetInstructionSet() const OVERRIDE {
	return InstructionSet::kThumb2;
	}

	// Helper method to move a 32bits value between two locations.
	void Move32(Location destination, Location source);
	// Helper method to move a 64bits value between two locations.
	void Move64(Location destination, Location source);

	// Load current method into `reg`.
	void LoadCurrentMethod(Register reg);

	// Generate code to invoke a runtime entry point.
	void InvokeRuntime(
	int32_t offset, HInstruction* instruction, uint32_t dex_pc, SlowPathCode* slow_path);

	// Emit a write barrier.
	void MarkGCCard(Register temp, Register card, Register object, Register value);

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

	void Initialize() OVERRIDE {
	block_labels_.SetSize(GetGraph()->GetBlocks().Size());
	}

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

	bool NeedsTwoRegisters(Primitive::Type type) const OVERRIDE {
	return type == Primitive::kPrimDouble \|\| type == Primitive::kPrimLong;
	}

	void ComputeSpillMask() OVERRIDE;

	Label* GetFrameEntryLabel() { return &frame_entry_label_; }

	void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, Register temp);

	private:
	// Labels for each block that will be compiled.
	GrowableArray<Label> block_labels_;
	Label frame_entry_label_;
	LocationsBuilderARM location_builder_;
	InstructionCodeGeneratorARM instruction_visitor_;
	ParallelMoveResolverARM move_resolver_;
	Thumb2Assembler assembler_;
	const ArmInstructionSetFeatures& isa_features_;

	DISALLOW_COPY_AND_ASSIGN(CodeGeneratorARM);
	};

	} // namespace arm
	} // namespace art

	#endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_ARM_H_