compiler/dex/compiler_enums.h - platform/art - Gitiles

 /*
  * Copyright (C) 2012 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_DEX_COMPILER_ENUMS_H_
 #define ART_COMPILER_DEX_COMPILER_ENUMS_H_

 #include "dex_instruction.h"

 namespace art {

 enum RegisterClass {
   kCoreReg,
   kFPReg,
   kAnyReg,
 };

 enum SpecialTargetRegister {
   kSelf,            // Thread pointer.
   kSuspend,         // Used to reduce suspend checks for some targets.
   kLr,
   kPc,
   kSp,
   kArg0,
   kArg1,
   kArg2,
   kArg3,
   kFArg0,
   kFArg1,
   kFArg2,
   kFArg3,
   kRet0,
   kRet1,
   kInvokeTgt,
   kHiddenArg,
   kHiddenFpArg,
   kCount
 };

 enum RegLocationType {
   kLocDalvikFrame = 0,  // Normal Dalvik register
   kLocPhysReg,
   kLocCompilerTemp,
   kLocInvalid
 };

 /**
  * Support for vector registers.  Initially used for x86 floats.  This will be used
  * to replace the assumption that a double takes up 2 single FP registers
  */
 enum VectorLengthType {
   kVectorNotUsed = 0,   // This value is NOT in a vector register.
   kVectorLength4,       // The value occupies 4 bytes in a vector register.
   kVectorLength8,       // The value occupies 8 bytes in a vector register.
   kVectorLength16       // The value occupies 16 bytes in a vector register (unused now).
 };

 enum BBType {
   kNullBlock,
   kEntryBlock,
   kDalvikByteCode,
   kExitBlock,
   kExceptionHandling,
   kDead,
 };

 /*
  * Def/Use encoding in 64-bit use_mask/def_mask.  Low positions used for target-specific
  * registers (and typically use the register number as the position).  High positions
  * reserved for common and abstract resources.
  */

 enum ResourceEncodingPos {
   kMustNotAlias = 63,
   kHeapRef = 62,          // Default memory reference type.
   kLiteral = 61,          // Literal pool memory reference.
   kDalvikReg = 60,        // Dalvik v_reg memory reference.
   kFPStatus = 59,
   kCCode = 58,
   kLowestCommonResource = kCCode
 };

 // Shared pseudo opcodes - must be < 0.
 enum LIRPseudoOpcode {
   kPseudoExportedPC = -16,
   kPseudoSafepointPC = -15,
   kPseudoIntrinsicRetry = -14,
   kPseudoSuspendTarget = -13,
   kPseudoThrowTarget = -12,
   kPseudoCaseLabel = -11,
   kPseudoMethodEntry = -10,
   kPseudoMethodExit = -9,
   kPseudoBarrier = -8,
   kPseudoEntryBlock = -7,
   kPseudoExitBlock = -6,
   kPseudoTargetLabel = -5,
   kPseudoDalvikByteCodeBoundary = -4,
   kPseudoPseudoAlign4 = -3,
   kPseudoEHBlockLabel = -2,
   kPseudoNormalBlockLabel = -1,
 };

 enum ExtendedMIROpcode {
   kMirOpFirst = kNumPackedOpcodes,
   kMirOpPhi = kMirOpFirst,
   kMirOpCopy,
   kMirOpFusedCmplFloat,
   kMirOpFusedCmpgFloat,
   kMirOpFusedCmplDouble,
   kMirOpFusedCmpgDouble,
   kMirOpFusedCmpLong,
   kMirOpNop,
   kMirOpNullCheck,
   kMirOpRangeCheck,
   kMirOpDivZeroCheck,
   kMirOpCheck,
   kMirOpCheckPart2,
   kMirOpSelect,
   kMirOpLast,
 };

 enum MIROptimizationFlagPositons {
   kMIRIgnoreNullCheck = 0,
   kMIRNullCheckOnly,
   kMIRIgnoreRangeCheck,
   kMIRRangeCheckOnly,
   kMIRIgnoreClInitCheck,
   kMIRInlined,                        // Invoke is inlined (ie dead).
   kMIRInlinedPred,                    // Invoke is inlined via prediction.
   kMIRCallee,                         // Instruction is inlined from callee.
   kMIRIgnoreSuspendCheck,
   kMIRDup,
   kMIRMark,                           // Temporary node mark.
 };

 // For successor_block_list.
 enum BlockListType {
   kNotUsed = 0,
   kCatch,
   kPackedSwitch,
   kSparseSwitch,
 };

 enum AssemblerStatus {
   kSuccess,
   kRetryAll,
 };

 enum OpSize {
   kWord,            // Natural word size of target (32/64).
   k32,
   k64,
   kReference,       // Object reference; compressed on 64-bit targets.
   kSingle,
   kDouble,
   kUnsignedHalf,
   kSignedHalf,
   kUnsignedByte,
   kSignedByte,
 };

 std::ostream& operator<<(std::ostream& os, const OpSize& kind);

 enum OpKind {
   kOpMov,
   kOpCmov,
   kOpMvn,
   kOpCmp,
   kOpLsl,
   kOpLsr,
   kOpAsr,
   kOpRor,
   kOpNot,
   kOpAnd,
   kOpOr,
   kOpXor,
   kOpNeg,
   kOpAdd,
   kOpAdc,
   kOpSub,
   kOpSbc,
   kOpRsub,
   kOpMul,
   kOpDiv,
   kOpRem,
   kOpBic,
   kOpCmn,
   kOpTst,
   kOpRev,
   kOpRevsh,
   kOpBkpt,
   kOpBlx,
   kOpPush,
   kOpPop,
   kOp2Char,
   kOp2Short,
   kOp2Byte,
   kOpCondBr,
   kOpUncondBr,
   kOpBx,
   kOpInvalid,
 };

 enum MoveType {
   kMov8GP,      // Move 8-bit general purpose register.
   kMov16GP,     // Move 16-bit general purpose register.
   kMov32GP,     // Move 32-bit general purpose register.
   kMov64GP,     // Move 64-bit general purpose register.
   kMov32FP,     // Move 32-bit FP register.
   kMov64FP,     // Move 64-bit FP register.
   kMovLo64FP,   // Move low 32-bits of 64-bit FP register.
   kMovHi64FP,   // Move high 32-bits of 64-bit FP register.
   kMovU128FP,   // Move 128-bit FP register to/from possibly unaligned region.
   kMov128FP = kMovU128FP,
   kMovA128FP,   // Move 128-bit FP register to/from region surely aligned to 16-bytes.
   kMovLo128FP,  // Move low 64-bits of 128-bit FP register.
   kMovHi128FP,  // Move high 64-bits of 128-bit FP register.
 };

 std::ostream& operator<<(std::ostream& os, const OpKind& kind);

 enum ConditionCode {
   kCondEq,  // equal
   kCondNe,  // not equal
   kCondCs,  // carry set
   kCondCc,  // carry clear
   kCondUlt,  // unsigned less than
   kCondUge,  // unsigned greater than or same
   kCondMi,  // minus
   kCondPl,  // plus, positive or zero
   kCondVs,  // overflow
   kCondVc,  // no overflow
   kCondHi,  // unsigned greater than
   kCondLs,  // unsigned lower or same
   kCondGe,  // signed greater than or equal
   kCondLt,  // signed less than
   kCondGt,  // signed greater than
   kCondLe,  // signed less than or equal
   kCondAl,  // always
   kCondNv,  // never
 };

 std::ostream& operator<<(std::ostream& os, const ConditionCode& kind);

 // Target specific condition encodings
 enum ArmConditionCode {
   kArmCondEq = 0x0,  // 0000
   kArmCondNe = 0x1,  // 0001
   kArmCondCs = 0x2,  // 0010
   kArmCondCc = 0x3,  // 0011
   kArmCondMi = 0x4,  // 0100
   kArmCondPl = 0x5,  // 0101
   kArmCondVs = 0x6,  // 0110
   kArmCondVc = 0x7,  // 0111
   kArmCondHi = 0x8,  // 1000
   kArmCondLs = 0x9,  // 1001
   kArmCondGe = 0xa,  // 1010
   kArmCondLt = 0xb,  // 1011
   kArmCondGt = 0xc,  // 1100
   kArmCondLe = 0xd,  // 1101
   kArmCondAl = 0xe,  // 1110
   kArmCondNv = 0xf,  // 1111
 };

 std::ostream& operator<<(std::ostream& os, const ArmConditionCode& kind);

 enum X86ConditionCode {
   kX86CondO   = 0x0,    // overflow
   kX86CondNo  = 0x1,    // not overflow

   kX86CondB   = 0x2,    // below
   kX86CondNae = kX86CondB,  // not-above-equal
   kX86CondC   = kX86CondB,  // carry

   kX86CondNb  = 0x3,    // not-below
   kX86CondAe  = kX86CondNb,  // above-equal
   kX86CondNc  = kX86CondNb,  // not-carry

   kX86CondZ   = 0x4,    // zero
   kX86CondEq  = kX86CondZ,  // equal

   kX86CondNz  = 0x5,    // not-zero
   kX86CondNe  = kX86CondNz,  // not-equal

   kX86CondBe  = 0x6,    // below-equal
   kX86CondNa  = kX86CondBe,  // not-above

   kX86CondNbe = 0x7,    // not-below-equal
   kX86CondA   = kX86CondNbe,  // above

   kX86CondS   = 0x8,    // sign
   kX86CondNs  = 0x9,    // not-sign

   kX86CondP   = 0xa,    // 8-bit parity even
   kX86CondPE  = kX86CondP,

   kX86CondNp  = 0xb,    // 8-bit parity odd
   kX86CondPo  = kX86CondNp,

   kX86CondL   = 0xc,    // less-than
   kX86CondNge = kX86CondL,  // not-greater-equal

   kX86CondNl  = 0xd,    // not-less-than
   kX86CondGe  = kX86CondNl,  // not-greater-equal

   kX86CondLe  = 0xe,    // less-than-equal
   kX86CondNg  = kX86CondLe,  // not-greater

   kX86CondNle = 0xf,    // not-less-than
   kX86CondG   = kX86CondNle,  // greater
 };

 std::ostream& operator<<(std::ostream& os, const X86ConditionCode& kind);

 enum ThrowKind {
   kThrowNoSuchMethod,
 };

 enum DividePattern {
   DivideNone,
   Divide3,
   Divide5,
   Divide7,
 };

 std::ostream& operator<<(std::ostream& os, const DividePattern& pattern);

 /**
  * @brief Memory barrier types (see "The JSR-133 Cookbook for Compiler Writers").
  * @details Without context sensitive analysis, the most conservative set of barriers
  * must be issued to ensure the Java Memory Model. Thus the recipe is as follows:
  * -# Use StoreStore barrier before volatile store.
  * -# Use StoreLoad barrier after volatile store.
  * -# Use LoadLoad and LoadStore barrier after each volatile load.
  * -# Use StoreStore barrier after all stores but before return from any constructor whose
  * class has final fields.
  */
 enum MemBarrierKind {
   kLoadStore,
   kLoadLoad,
   kStoreStore,
   kStoreLoad
 };

 std::ostream& operator<<(std::ostream& os, const MemBarrierKind& kind);

 enum OpFeatureFlags {
   kIsBranch = 0,
   kNoOperand,
   kIsUnaryOp,
   kIsBinaryOp,
   kIsTertiaryOp,
   kIsQuadOp,
   kIsQuinOp,
   kIsSextupleOp,
   kIsIT,
   kMemLoad,
   kMemStore,
   kPCRelFixup,  // x86 FIXME: add NEEDS_FIXUP to instruction attributes.
   kRegDef0,
   kRegDef1,
   kRegDef2,
   kRegDefA,
   kRegDefD,
   kRegDefFPCSList0,
   kRegDefFPCSList2,
   kRegDefList0,
   kRegDefList1,
   kRegDefList2,
   kRegDefLR,
   kRegDefSP,
   kRegUse0,
   kRegUse1,
   kRegUse2,
   kRegUse3,
   kRegUse4,
   kRegUseA,
   kRegUseC,
   kRegUseD,
   kRegUseB,
   kRegUseFPCSList0,
   kRegUseFPCSList2,
   kRegUseList0,
   kRegUseList1,
   kRegUseLR,
   kRegUsePC,
   kRegUseSP,
   kSetsCCodes,
   kUsesCCodes,
   kUseFpStack,
   kUseHi,
   kUseLo,
   kDefHi,
   kDefLo
 };

 enum SelectInstructionKind {
   kSelectNone,
   kSelectConst,
   kSelectMove,
   kSelectGoto
 };

 std::ostream& operator<<(std::ostream& os, const SelectInstructionKind& kind);

 // LIR fixup kinds for Arm
 enum FixupKind {
   kFixupNone,
   kFixupLabel,       // For labels we just adjust the offset.
   kFixupLoad,        // Mostly for immediates.
   kFixupVLoad,       // FP load which *may* be pc-relative.
   kFixupCBxZ,        // Cbz, Cbnz.
   kFixupPushPop,     // Not really pc relative, but changes size based on args.
   kFixupCondBranch,  // Conditional branch
   kFixupT1Branch,    // Thumb1 Unconditional branch
   kFixupT2Branch,    // Thumb2 Unconditional branch
   kFixupBlx1,        // Blx1 (start of Blx1/Blx2 pair).
   kFixupBl1,         // Bl1 (start of Bl1/Bl2 pair).
   kFixupAdr,         // Adr.
   kFixupMovImmLST,   // kThumb2MovImm16LST.
   kFixupMovImmHST,   // kThumb2MovImm16HST.
   kFixupAlign4,      // Align to 4-byte boundary.
 };

 std::ostream& operator<<(std::ostream& os, const FixupKind& kind);

 }  // namespace art

 #endif  // ART_COMPILER_DEX_COMPILER_ENUMS_H_
	/*
	* Copyright (C) 2012 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_DEX_COMPILER_ENUMS_H_
	#define ART_COMPILER_DEX_COMPILER_ENUMS_H_

	#include "dex_instruction.h"

	namespace art {

	enum RegisterClass {
	kCoreReg,
	kFPReg,
	kAnyReg,
	};

	enum SpecialTargetRegister {
	kSelf, // Thread pointer.
	kSuspend, // Used to reduce suspend checks for some targets.
	kLr,
	kPc,
	kSp,
	kArg0,
	kArg1,
	kArg2,
	kArg3,
	kFArg0,
	kFArg1,
	kFArg2,
	kFArg3,
	kRet0,
	kRet1,
	kInvokeTgt,
	kHiddenArg,
	kHiddenFpArg,
	kCount
	};

	enum RegLocationType {
	kLocDalvikFrame = 0, // Normal Dalvik register
	kLocPhysReg,
	kLocCompilerTemp,
	kLocInvalid
	};

	/**
	* Support for vector registers. Initially used for x86 floats. This will be used
	* to replace the assumption that a double takes up 2 single FP registers
	*/
	enum VectorLengthType {
	kVectorNotUsed = 0, // This value is NOT in a vector register.
	kVectorLength4, // The value occupies 4 bytes in a vector register.
	kVectorLength8, // The value occupies 8 bytes in a vector register.
	kVectorLength16 // The value occupies 16 bytes in a vector register (unused now).
	};

	enum BBType {
	kNullBlock,
	kEntryBlock,
	kDalvikByteCode,
	kExitBlock,
	kExceptionHandling,
	kDead,
	};

	/*
	* Def/Use encoding in 64-bit use_mask/def_mask. Low positions used for target-specific
	* registers (and typically use the register number as the position). High positions
	* reserved for common and abstract resources.
	*/

	enum ResourceEncodingPos {
	kMustNotAlias = 63,
	kHeapRef = 62, // Default memory reference type.
	kLiteral = 61, // Literal pool memory reference.
	kDalvikReg = 60, // Dalvik v_reg memory reference.
	kFPStatus = 59,
	kCCode = 58,
	kLowestCommonResource = kCCode
	};

	// Shared pseudo opcodes - must be < 0.
	enum LIRPseudoOpcode {
	kPseudoExportedPC = -16,
	kPseudoSafepointPC = -15,
	kPseudoIntrinsicRetry = -14,
	kPseudoSuspendTarget = -13,
	kPseudoThrowTarget = -12,
	kPseudoCaseLabel = -11,
	kPseudoMethodEntry = -10,
	kPseudoMethodExit = -9,
	kPseudoBarrier = -8,
	kPseudoEntryBlock = -7,
	kPseudoExitBlock = -6,
	kPseudoTargetLabel = -5,
	kPseudoDalvikByteCodeBoundary = -4,
	kPseudoPseudoAlign4 = -3,
	kPseudoEHBlockLabel = -2,
	kPseudoNormalBlockLabel = -1,
	};

	enum ExtendedMIROpcode {
	kMirOpFirst = kNumPackedOpcodes,
	kMirOpPhi = kMirOpFirst,
	kMirOpCopy,
	kMirOpFusedCmplFloat,
	kMirOpFusedCmpgFloat,
	kMirOpFusedCmplDouble,
	kMirOpFusedCmpgDouble,
	kMirOpFusedCmpLong,
	kMirOpNop,
	kMirOpNullCheck,
	kMirOpRangeCheck,
	kMirOpDivZeroCheck,
	kMirOpCheck,
	kMirOpCheckPart2,
	kMirOpSelect,
	kMirOpLast,
	};

	enum MIROptimizationFlagPositons {
	kMIRIgnoreNullCheck = 0,
	kMIRNullCheckOnly,
	kMIRIgnoreRangeCheck,
	kMIRRangeCheckOnly,
	kMIRIgnoreClInitCheck,
	kMIRInlined, // Invoke is inlined (ie dead).
	kMIRInlinedPred, // Invoke is inlined via prediction.
	kMIRCallee, // Instruction is inlined from callee.
	kMIRIgnoreSuspendCheck,
	kMIRDup,
	kMIRMark, // Temporary node mark.
	};

	// For successor_block_list.
	enum BlockListType {
	kNotUsed = 0,
	kCatch,
	kPackedSwitch,
	kSparseSwitch,
	};

	enum AssemblerStatus {
	kSuccess,
	kRetryAll,
	};

	enum OpSize {
	kWord, // Natural word size of target (32/64).
	k32,
	k64,
	kReference, // Object reference; compressed on 64-bit targets.
	kSingle,
	kDouble,
	kUnsignedHalf,
	kSignedHalf,
	kUnsignedByte,
	kSignedByte,
	};

	std::ostream& operator<<(std::ostream& os, const OpSize& kind);

	enum OpKind {
	kOpMov,
	kOpCmov,
	kOpMvn,
	kOpCmp,
	kOpLsl,
	kOpLsr,
	kOpAsr,
	kOpRor,
	kOpNot,
	kOpAnd,
	kOpOr,
	kOpXor,
	kOpNeg,
	kOpAdd,
	kOpAdc,
	kOpSub,
	kOpSbc,
	kOpRsub,
	kOpMul,
	kOpDiv,
	kOpRem,
	kOpBic,
	kOpCmn,
	kOpTst,
	kOpRev,
	kOpRevsh,
	kOpBkpt,
	kOpBlx,
	kOpPush,
	kOpPop,
	kOp2Char,
	kOp2Short,
	kOp2Byte,
	kOpCondBr,
	kOpUncondBr,
	kOpBx,
	kOpInvalid,
	};

	enum MoveType {
	kMov8GP, // Move 8-bit general purpose register.
	kMov16GP, // Move 16-bit general purpose register.
	kMov32GP, // Move 32-bit general purpose register.
	kMov64GP, // Move 64-bit general purpose register.
	kMov32FP, // Move 32-bit FP register.
	kMov64FP, // Move 64-bit FP register.
	kMovLo64FP, // Move low 32-bits of 64-bit FP register.
	kMovHi64FP, // Move high 32-bits of 64-bit FP register.
	kMovU128FP, // Move 128-bit FP register to/from possibly unaligned region.
	kMov128FP = kMovU128FP,
	kMovA128FP, // Move 128-bit FP register to/from region surely aligned to 16-bytes.
	kMovLo128FP, // Move low 64-bits of 128-bit FP register.
	kMovHi128FP, // Move high 64-bits of 128-bit FP register.
	};

	std::ostream& operator<<(std::ostream& os, const OpKind& kind);

	enum ConditionCode {
	kCondEq, // equal
	kCondNe, // not equal
	kCondCs, // carry set
	kCondCc, // carry clear
	kCondUlt, // unsigned less than
	kCondUge, // unsigned greater than or same
	kCondMi, // minus
	kCondPl, // plus, positive or zero
	kCondVs, // overflow
	kCondVc, // no overflow
	kCondHi, // unsigned greater than
	kCondLs, // unsigned lower or same
	kCondGe, // signed greater than or equal
	kCondLt, // signed less than
	kCondGt, // signed greater than
	kCondLe, // signed less than or equal
	kCondAl, // always
	kCondNv, // never
	};

	std::ostream& operator<<(std::ostream& os, const ConditionCode& kind);

	// Target specific condition encodings
	enum ArmConditionCode {
	kArmCondEq = 0x0, // 0000
	kArmCondNe = 0x1, // 0001
	kArmCondCs = 0x2, // 0010
	kArmCondCc = 0x3, // 0011
	kArmCondMi = 0x4, // 0100
	kArmCondPl = 0x5, // 0101
	kArmCondVs = 0x6, // 0110
	kArmCondVc = 0x7, // 0111
	kArmCondHi = 0x8, // 1000
	kArmCondLs = 0x9, // 1001
	kArmCondGe = 0xa, // 1010
	kArmCondLt = 0xb, // 1011
	kArmCondGt = 0xc, // 1100
	kArmCondLe = 0xd, // 1101
	kArmCondAl = 0xe, // 1110
	kArmCondNv = 0xf, // 1111
	};

	std::ostream& operator<<(std::ostream& os, const ArmConditionCode& kind);

	enum X86ConditionCode {
	kX86CondO = 0x0, // overflow
	kX86CondNo = 0x1, // not overflow

	kX86CondB = 0x2, // below
	kX86CondNae = kX86CondB, // not-above-equal
	kX86CondC = kX86CondB, // carry

	kX86CondNb = 0x3, // not-below
	kX86CondAe = kX86CondNb, // above-equal
	kX86CondNc = kX86CondNb, // not-carry

	kX86CondZ = 0x4, // zero
	kX86CondEq = kX86CondZ, // equal

	kX86CondNz = 0x5, // not-zero
	kX86CondNe = kX86CondNz, // not-equal

	kX86CondBe = 0x6, // below-equal
	kX86CondNa = kX86CondBe, // not-above

	kX86CondNbe = 0x7, // not-below-equal
	kX86CondA = kX86CondNbe, // above

	kX86CondS = 0x8, // sign
	kX86CondNs = 0x9, // not-sign

	kX86CondP = 0xa, // 8-bit parity even
	kX86CondPE = kX86CondP,

	kX86CondNp = 0xb, // 8-bit parity odd
	kX86CondPo = kX86CondNp,

	kX86CondL = 0xc, // less-than
	kX86CondNge = kX86CondL, // not-greater-equal

	kX86CondNl = 0xd, // not-less-than
	kX86CondGe = kX86CondNl, // not-greater-equal

	kX86CondLe = 0xe, // less-than-equal
	kX86CondNg = kX86CondLe, // not-greater

	kX86CondNle = 0xf, // not-less-than
	kX86CondG = kX86CondNle, // greater
	};

	std::ostream& operator<<(std::ostream& os, const X86ConditionCode& kind);

	enum ThrowKind {
	kThrowNoSuchMethod,
	};

	enum DividePattern {
	DivideNone,
	Divide3,
	Divide5,
	Divide7,
	};

	std::ostream& operator<<(std::ostream& os, const DividePattern& pattern);

	/**
	* @brief Memory barrier types (see "The JSR-133 Cookbook for Compiler Writers").
	* @details Without context sensitive analysis, the most conservative set of barriers
	* must be issued to ensure the Java Memory Model. Thus the recipe is as follows:
	* -# Use StoreStore barrier before volatile store.
	* -# Use StoreLoad barrier after volatile store.
	* -# Use LoadLoad and LoadStore barrier after each volatile load.
	* -# Use StoreStore barrier after all stores but before return from any constructor whose
	* class has final fields.
	*/
	enum MemBarrierKind {
	kLoadStore,
	kLoadLoad,
	kStoreStore,
	kStoreLoad
	};

	std::ostream& operator<<(std::ostream& os, const MemBarrierKind& kind);

	enum OpFeatureFlags {
	kIsBranch = 0,
	kNoOperand,
	kIsUnaryOp,
	kIsBinaryOp,
	kIsTertiaryOp,
	kIsQuadOp,
	kIsQuinOp,
	kIsSextupleOp,
	kIsIT,
	kMemLoad,
	kMemStore,
	kPCRelFixup, // x86 FIXME: add NEEDS_FIXUP to instruction attributes.
	kRegDef0,
	kRegDef1,
	kRegDef2,
	kRegDefA,
	kRegDefD,
	kRegDefFPCSList0,
	kRegDefFPCSList2,
	kRegDefList0,
	kRegDefList1,
	kRegDefList2,
	kRegDefLR,
	kRegDefSP,
	kRegUse0,
	kRegUse1,
	kRegUse2,
	kRegUse3,
	kRegUse4,
	kRegUseA,
	kRegUseC,
	kRegUseD,
	kRegUseB,
	kRegUseFPCSList0,
	kRegUseFPCSList2,
	kRegUseList0,
	kRegUseList1,
	kRegUseLR,
	kRegUsePC,
	kRegUseSP,
	kSetsCCodes,
	kUsesCCodes,
	kUseFpStack,
	kUseHi,
	kUseLo,
	kDefHi,
	kDefLo
	};

	enum SelectInstructionKind {
	kSelectNone,
	kSelectConst,
	kSelectMove,
	kSelectGoto
	};

	std::ostream& operator<<(std::ostream& os, const SelectInstructionKind& kind);

	// LIR fixup kinds for Arm
	enum FixupKind {
	kFixupNone,
	kFixupLabel, // For labels we just adjust the offset.
	kFixupLoad, // Mostly for immediates.
	kFixupVLoad, // FP load which may be pc-relative.
	kFixupCBxZ, // Cbz, Cbnz.
	kFixupPushPop, // Not really pc relative, but changes size based on args.
	kFixupCondBranch, // Conditional branch
	kFixupT1Branch, // Thumb1 Unconditional branch
	kFixupT2Branch, // Thumb2 Unconditional branch
	kFixupBlx1, // Blx1 (start of Blx1/Blx2 pair).
	kFixupBl1, // Bl1 (start of Bl1/Bl2 pair).
	kFixupAdr, // Adr.
	kFixupMovImmLST, // kThumb2MovImm16LST.
	kFixupMovImmHST, // kThumb2MovImm16HST.
	kFixupAlign4, // Align to 4-byte boundary.
	};

	std::ostream& operator<<(std::ostream& os, const FixupKind& kind);

	} // namespace art

	#endif // ART_COMPILER_DEX_COMPILER_ENUMS_H_