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codegen.h
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codegen.h
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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
//
// This class contains all the data & functionality for code generation
// of a method, except for the target-specific elements, which are
// primarily in the Target class.
//
#ifndef _CODEGEN_H_
#define _CODEGEN_H_
#include "compiler.h" // temporary??
#include "codegeninterface.h"
#include "regset.h"
#include "jitgcinfo.h"
#if defined(_TARGET_AMD64_) || defined(_TARGET_ARM64_) || defined(_TARGET_ARM_)
#define FOREACH_REGISTER_FILE(file)\
for ((file) = &(this->intRegState); \
(file) != NULL; \
(file) = ((file) == &(this->intRegState)) ? &(this->floatRegState) : NULL )
#else
#define FOREACH_REGISTER_FILE(file) (file) = &(this->intRegState);
#endif
class CodeGen : public CodeGenInterface
{
friend class emitter;
friend class DisAssembler;
public:
// This could use further abstraction
CodeGen(Compiler * theCompiler);
virtual void genGenerateCode(void * * codePtr, ULONG * nativeSizeOfCode);
// TODO-Cleanup: Abstract out the part of this that finds the addressing mode, and
// move it to Lower
virtual bool genCreateAddrMode(GenTreePtr addr,
int mode,
bool fold,
regMaskTP regMask,
bool * revPtr,
GenTreePtr * rv1Ptr,
GenTreePtr * rv2Ptr,
#if SCALED_ADDR_MODES
unsigned * mulPtr,
#endif
unsigned * cnsPtr,
bool nogen = false);
// This should move to CodeGenClassic.h after genCreateAddrMode() is no longer dependent upon it
void genIncRegBy (regNumber reg,
ssize_t ival,
GenTreePtr tree,
var_types dstType = TYP_INT,
bool ovfl = false);
private:
#if defined(_TARGET_XARCH_) && !FEATURE_STACK_FP_X87
// Bit masks used in negating a float or double number.
// The below gentrees encapsulate the data offset to the bitmasks as GT_CLS_VAR nodes.
// This is to avoid creating more than one data constant for these bitmasks when a
// method has more than one GT_NEG operation on floating point values.
GenTreePtr negBitmaskFlt;
GenTreePtr negBitmaskDbl;
// Bit masks used in computing Math.Abs() of a float or double number.
GenTreePtr absBitmaskFlt;
GenTreePtr absBitmaskDbl;
// Bit mask used in U8 -> double conversion to adjust the result.
GenTreePtr u8ToDblBitmask;
// Generates SSE2 code for the given tree as "Operand BitWiseOp BitMask"
void genSSE2BitwiseOp(GenTreePtr treeNode);
#endif // defined(_TARGET_XARCH_) && !FEATURE_STACK_FP_X87
void genPrepForCompiler ();
void genPrepForEHCodegen ();
inline RegState *regStateForType(var_types t) { return varTypeIsFloating(t) ? &floatRegState : &intRegState; }
inline RegState *regStateForReg(regNumber reg) { return genIsValidFloatReg(reg) ? &floatRegState : &intRegState; }
regNumber genFramePointerReg() { if (isFramePointerUsed())
return REG_FPBASE;
else
return REG_SPBASE; }
static emitJumpKind genJumpKindForOper(genTreeOps cmp, bool isUnsigned);
#ifdef _TARGET_XARCH_
// For a given compare oper tree, returns the conditions to use with jmp/set in 'jmpKind' array.
// The corresponding elements of jmpToTrueLabel indicate whether the target of the jump is to the
// 'true' label or a 'false' label.
//
// 'true' label corresponds to jump target of the current basic block i.e. the target to
// branch to on compare condition being true. 'false' label corresponds to the target to
// branch to on condition being false.
static void genJumpKindsForTree(GenTreePtr cmpTree, emitJumpKind jmpKind[2], bool jmpToTrueLabel[2]);
#endif // _TARGET_XARCH_
static bool genShouldRoundFP();
GenTreeIndir indirForm(var_types type, GenTree *base);
GenTreeIntCon intForm(var_types type, ssize_t value);
void genRangeCheck(GenTree *node);
void genLockedInstructions(GenTree *node);
//-------------------------------------------------------------------------
// Register-related methods
void rsInit();
#ifdef REG_OPT_RSVD
// On some targets such as the ARM we may need to have an extra reserved register
// that is used when addressing stack based locals and stack based temps.
// This method returns the regNumber that should be used when an extra register
// is needed to access the stack based locals and stack based temps.
//
regNumber rsGetRsvdReg()
{
// We should have already added this register to the mask
// of reserved registers in regSet.rdMaskResvd
noway_assert((regSet.rsMaskResvd & RBM_OPT_RSVD) != 0);
return REG_OPT_RSVD;
}
#endif // REG_OPT_RSVD
regNumber findStkLclInReg(unsigned lclNum)
{
#ifdef DEBUG
genInterruptibleUsed = true;
#endif
return regTracker.rsLclIsInReg(lclNum);
}
//-------------------------------------------------------------------------
bool genUseBlockInit; // true if we plan to block-initialize the local stack frame
unsigned genInitStkLclCnt; // The count of local variables that we need to zero init
// Keeps track of how many bytes we've pushed on the processor's stack.
//
unsigned genStackLevel;
#if STACK_PROBES
// Stack Probes
bool genNeedPrologStackProbe;
void genGenerateStackProbe();
#endif
regMaskTP genNewLiveRegMask (GenTreePtr first, GenTreePtr second);
// During codegen, determine the LiveSet after tree.
// Preconditions: must be called during codegen, when compCurLife and
// compCurLifeTree are being maintained, and tree must occur in the current
// statement.
VARSET_VALRET_TP genUpdateLiveSetForward(GenTreePtr tree);
//-------------------------------------------------------------------------
void genReportEH();
// Allocates storage for the GC info, writes the GC info into that storage, records the address of the
// GC info of the method with the EE, and returns a pointer to the "info" portion (just post-header) of
// the GC info. Requires "codeSize" to be the size of the generated code, "prologSize" and "epilogSize"
// to be the sizes of the prolog and epilog, respectively. In DEBUG, makes a check involving the
// "codePtr", assumed to be a pointer to the start of the generated code.
#ifdef JIT32_GCENCODER
void* genCreateAndStoreGCInfo (unsigned codeSize, unsigned prologSize, unsigned epilogSize DEBUG_ARG(void* codePtr));
void* genCreateAndStoreGCInfoJIT32(unsigned codeSize, unsigned prologSize, unsigned epilogSize DEBUG_ARG(void* codePtr));
#else // !JIT32_GCENCODER
void genCreateAndStoreGCInfo (unsigned codeSize, unsigned prologSize, unsigned epilogSize DEBUG_ARG(void* codePtr));
void genCreateAndStoreGCInfoX64 (unsigned codeSize, unsigned prologSize DEBUG_ARG(void* codePtr));
#endif // !JIT32_GCENCODER
/**************************************************************************
* PROTECTED
*************************************************************************/
protected :
// the current (pending) label ref, a label which has been referenced but not yet seen
BasicBlock* genPendingCallLabel;
#ifdef DEBUG
// Last instr we have displayed for dspInstrs
unsigned genCurDispOffset;
static const char *genInsName(instruction ins);
#endif // DEBUG
#ifdef LEGACY_BACKEND
//-------------------------------------------------------------------------
//
// If we know that the flags register is set to a value that corresponds
// to the current value of a register or variable, the following values
// record that information.
//
emitLocation genFlagsEqLoc;
regNumber genFlagsEqReg;
unsigned genFlagsEqVar;
void genFlagsEqualToNone ();
void genFlagsEqualToReg (GenTreePtr tree, regNumber reg);
void genFlagsEqualToVar (GenTreePtr tree, unsigned var);
bool genFlagsAreReg (regNumber reg);
bool genFlagsAreVar (unsigned var);
#endif // LEGACY_BACKEND
//-------------------------------------------------------------------------
// JIT-time constants for use in multi-dimensional array code generation.
unsigned genOffsetOfMDArrayLowerBound(var_types elemType, unsigned rank, unsigned dimension);
unsigned genOffsetOfMDArrayDimensionSize(var_types elemType, unsigned rank, unsigned dimension);
#ifdef DEBUG
static
const char * genSizeStr (emitAttr size);
void genStressRegs (GenTreePtr tree);
#endif // DEBUG
void genCodeForBBlist ();
public:
#ifndef LEGACY_BACKEND
// genSpillVar is called by compUpdateLifeVar in the !LEGACY_BACKEND case
void genSpillVar (GenTreePtr tree);
#endif // !LEGACY_BACKEND
protected:
#ifndef LEGACY_BACKEND
void genEmitHelperCall (unsigned helper,
int argSize,
emitAttr retSize,
regNumber callTarget = REG_NA);
#else
void genEmitHelperCall (unsigned helper,
int argSize,
emitAttr retSize);
#endif
void genGCWriteBarrier (GenTreePtr tree,
GCInfo::WriteBarrierForm wbf);
BasicBlock * genCreateTempLabel ();
void genDefineTempLabel (BasicBlock * label);
void genAdjustSP (ssize_t delta);
void genExitCode (BasicBlock * block);
//-------------------------------------------------------------------------
GenTreePtr genMakeConst (const void * cnsAddr,
var_types cnsType,
GenTreePtr cnsTree,
bool dblAlign);
//-------------------------------------------------------------------------
void genJumpToThrowHlpBlk(emitJumpKind jumpKind,
Compiler::addCodeKind codeKind,
GenTreePtr failBlk = NULL);
void genCheckOverflow (GenTreePtr tree);
//-------------------------------------------------------------------------
//
// Prolog/epilog generation
//
//-------------------------------------------------------------------------
//
// Prolog functions and data (there are a few exceptions for more generally used things)
//
void genFnPrologCalleeRegArgs(regNumber xtraReg,
bool * pXtraRegClobbered,
RegState *regState);
void genEnregisterIncomingStackArgs();
void genCheckUseBlockInit();
#if defined(_TARGET_ARM64_)
void genStackPointerAdjustment(ssize_t spAdjustment,
regNumber tmpReg,
bool* pTmpRegIsZero);
void genPrologSaveRegPair(regNumber reg1,
regNumber reg2,
int spOffset,
int spDelta,
bool lastSavedWasPreviousPair,
regNumber tmpReg,
bool* pTmpRegIsZero);
void genPrologSaveReg(regNumber reg1,
int spOffset,
int spDelta,
regNumber tmpReg,
bool* pTmpRegIsZero);
void genEpilogRestoreRegPair(regNumber reg1,
regNumber reg2,
int spOffset,
int spDelta,
regNumber tmpReg,
bool* pTmpRegIsZero);
void genEpilogRestoreReg(regNumber reg1,
int spOffset,
int spDelta,
regNumber tmpReg,
bool* pTmpRegIsZero);
void genSaveCalleeSavedRegistersHelp(regMaskTP regsToSaveMask,
int lowestCalleeSavedOffset,
int spDelta);
void genRestoreCalleeSavedRegistersHelp(regMaskTP regsToRestoreMask,
int lowestCalleeSavedOffset,
int spDelta);
void genPushCalleeSavedRegisters(regNumber initReg,
bool * pInitRegZeroed);
#else
void genPushCalleeSavedRegisters();
#endif
void genAllocLclFrame (unsigned frameSize,
regNumber initReg,
bool * pInitRegZeroed,
regMaskTP maskArgRegsLiveIn);
#if defined(_TARGET_ARM_)
void genPushFltRegs (regMaskTP regMask);
void genPopFltRegs (regMaskTP regMask);
regMaskTP genStackAllocRegisterMask(unsigned frameSize, regMaskTP maskCalleeSavedFloat);
regMaskTP genJmpCallArgMask();
void genFreeLclFrame (unsigned frameSize,
/* IN OUT */ bool* pUnwindStarted,
bool jmpEpilog);
bool genUsedPopToReturn; // True if we use the pop into PC to return,
// False if we didn't and must branch to LR to return.
// A set of information that is used by funclet prolog and epilog generation. It is collected once, before
// funclet prologs and epilogs are generated, and used by all funclet prologs and epilogs, which must all be the same.
struct FuncletFrameInfoDsc
{
regMaskTP fiSaveRegs; // Set of registers saved in the funclet prolog (includes LR)
unsigned fiFunctionCallerSPtoFPdelta; // Delta between caller SP and the frame pointer
unsigned fiSpDelta; // Stack pointer delta
unsigned fiPSP_slot_SP_offset; // PSP slot offset from SP
int fiPSP_slot_CallerSP_offset; // PSP slot offset from Caller SP
};
FuncletFrameInfoDsc genFuncletInfo;
#elif defined(_TARGET_ARM64_)
// A set of information that is used by funclet prolog and epilog generation. It is collected once, before
// funclet prologs and epilogs are generated, and used by all funclet prologs and epilogs, which must all be the same.
struct FuncletFrameInfoDsc
{
regMaskTP fiSaveRegs; // Set of callee-saved registers saved in the funclet prolog (includes LR)
int fiFunction_CallerSP_to_FP_delta; // Delta between caller SP and the frame pointer in the parent function (negative)
int fiSP_to_FPLR_save_delta; // FP/LR register save offset from SP (positive)
int fiSP_to_PSP_slot_delta; // PSP slot offset from SP (positive)
int fiSP_to_CalleeSave_delta; // First callee-saved register slot offset from SP (positive)
int fiCallerSP_to_PSP_slot_delta; // PSP slot offset from Caller SP (negative)
int fiFrameType; // Funclet frame types are numbered. See genFuncletProlog() for details.
int fiSpDelta1; // Stack pointer delta 1 (negative)
int fiSpDelta2; // Stack pointer delta 2 (negative)
};
FuncletFrameInfoDsc genFuncletInfo;
#elif defined(_TARGET_XARCH_) && !FEATURE_STACK_FP_X87
// Save/Restore callee saved float regs to stack
void genPreserveCalleeSavedFltRegs(unsigned lclFrameSize);
void genRestoreCalleeSavedFltRegs(unsigned lclFrameSize);
#ifdef _TARGET_AMD64_
// A set of information that is used by funclet prolog and epilog generation. It is collected once, before
// funclet prologs and epilogs are generated, and used by all funclet prologs and epilogs, which must all be the same.
struct FuncletFrameInfoDsc
{
unsigned fiFunction_InitialSP_to_FP_delta; // Delta between Initial-SP and the frame pointer
unsigned fiSpDelta; // Stack pointer delta
int fiPSP_slot_InitialSP_offset; // PSP slot offset from Initial-SP
};
FuncletFrameInfoDsc genFuncletInfo;
#endif // _TARGET_AMD64_
#endif // _TARGET_XARCH_ && FEATURE_STACK_FP_X87
#if !FEATURE_STACK_FP_X87
void genZeroInitFltRegs (const regMaskTP& initFltRegs,
const regMaskTP& initDblRegs,
const regNumber& initReg);
#endif // !FEATURE_STACK_FP_X87
regNumber genGetZeroReg (regNumber initReg,
bool* pInitRegZeroed);
void genZeroInitFrame (int untrLclHi,
int untrLclLo,
regNumber initReg,
bool * pInitRegZeroed);
void genReportGenericContextArg (regNumber initReg,
bool * pInitRegZeroed);
void genSetGSSecurityCookie (regNumber initReg,
bool * pInitRegZeroed);
void genFinalizeFrame();
#ifdef PROFILING_SUPPORTED
void genProfilingEnterCallback (regNumber initReg,
bool * pInitRegZeroed);
void genProfilingLeaveCallback(unsigned helper = CORINFO_HELP_PROF_FCN_LEAVE);
#endif // PROFILING_SUPPORTED
#if INLINE_NDIRECT
regMaskTP genPInvokeMethodProlog(regMaskTP initRegs);
void genPInvokeMethodEpilog();
#endif // INLINE_NDIRECT
void genPrologPadForReJit();
void genEmitCall(int callType,
CORINFO_METHOD_HANDLE methHnd,
INDEBUG_LDISASM_COMMA(CORINFO_SIG_INFO* sigInfo)
void* addr
X86_ARG(ssize_t argSize),
emitAttr retSize,
IL_OFFSETX ilOffset,
regNumber base = REG_NA,
bool isJump = false,
bool isNoGC = false);
void genEmitCall(int callType,
CORINFO_METHOD_HANDLE methHnd,
INDEBUG_LDISASM_COMMA(CORINFO_SIG_INFO* sigInfo)
GenTreeIndir* indir
X86_ARG(ssize_t argSize),
emitAttr retSize,
IL_OFFSETX ilOffset);
//
// Epilog functions
//
#if defined(_TARGET_ARM_)
bool genCanUsePopToReturn(regMaskTP maskPopRegsInt, bool jmpEpilog);
#endif
#if defined(_TARGET_ARM64_)
void genPopCalleeSavedRegistersAndFreeLclFrame(bool jmpEpilog,
/* IN OUT */ bool* pUnwindStarted);
#else // !defined(_TARGET_ARM64_)
void genPopCalleeSavedRegisters(bool jmpEpilog = false);
#endif // !defined(_TARGET_ARM64_)
//
// Common or driving functions
//
void genReserveProlog (BasicBlock* block); // currently unused
void genReserveEpilog (BasicBlock* block);
void genFnProlog ();
void genFnEpilog (BasicBlock* block);
#if FEATURE_EH_FUNCLETS
void genReserveFuncletProlog (BasicBlock* block);
void genReserveFuncletEpilog (BasicBlock* block);
void genFuncletProlog (BasicBlock* block);
void genFuncletEpilog ();
void genCaptureFuncletPrologEpilogInfo();
void genSetPSPSym (regNumber initReg,
bool * pInitRegZeroed);
void genUpdateCurrentFunclet (BasicBlock * block);
#else // FEATURE_EH_FUNCLETS
// This is a no-op when there are no funclets!
void genUpdateCurrentFunclet(BasicBlock * block) { return; }
#endif // FEATURE_EH_FUNCLETS
void genGeneratePrologsAndEpilogs();
#if defined(DEBUG) && defined(_TARGET_ARM64_)
void genArm64EmitterUnitTests();
#endif
#if defined(DEBUG) && defined(LATE_DISASM) && defined(_TARGET_AMD64_)
void genAmd64EmitterUnitTests();
#endif
//-------------------------------------------------------------------------
//
// End prolog/epilog generation
//
//-------------------------------------------------------------------------
#if INLINE_NDIRECT
regNumber genPInvokeCallProlog(LclVarDsc * varDsc,
int argSize,
CORINFO_METHOD_HANDLE methodToken,
BasicBlock * returnLabel);
void genPInvokeCallEpilog(LclVarDsc * varDsc,
regMaskTP retVal);
#endif
/*****************************************************************************/
#ifdef DEBUGGING_SUPPORT
/*****************************************************************************/
#ifdef DEBUG
void genIPmappingDisp(unsigned mappingNum, Compiler::IPmappingDsc* ipMapping);
void genIPmappingListDisp();
#endif // DEBUG
void genIPmappingAdd (IL_OFFSETX offset,
bool isLabel);
void genIPmappingAddToFront(IL_OFFSETX offset);
void genIPmappingGen ();
void genEnsureCodeEmitted (IL_OFFSETX offsx);
//-------------------------------------------------------------------------
// scope info for the variables
void genSetScopeInfo (unsigned which,
UNATIVE_OFFSET startOffs,
UNATIVE_OFFSET length,
unsigned varNum,
unsigned LVnum,
bool avail,
Compiler::siVarLoc & loc);
void genSetScopeInfo ();
void genRemoveBBsection(BasicBlock *head, BasicBlock *tail);
protected :
/*
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XX XX
XX ScopeInfo XX
XX XX
XX Keeps track of the scopes during code-generation. XX
XX This is used to translate the local-variable debugging information XX
XX from IL offsets to native code offsets. XX
XX XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
*/
/*****************************************************************************/
/*****************************************************************************
* ScopeInfo
*
* This class is called during code gen at block-boundaries, and when the
* set of live variables changes. It keeps track of the scope of the variables
* in terms of the native code PC.
*/
public:
void siInit ();
void siBeginBlock (BasicBlock* block);
void siEndBlock (BasicBlock* block);
virtual void siUpdate ();
void siCheckVarScope (unsigned varNum, IL_OFFSET offs);
void siCloseAllOpenScopes();
#ifdef DEBUG
void siDispOpenScopes();
#endif
/**************************************************************************
* PROTECTED
*************************************************************************/
protected :
struct siScope
{
emitLocation scStartLoc; // emitter location of start of scope
emitLocation scEndLoc; // emitter location of end of scope
unsigned scVarNum; // index into lvaTable
unsigned scLVnum; // 'which' in eeGetLVinfo()
unsigned scStackLevel; // Only for stk-vars
bool scAvailable :1; // It has a home / Home recycled - TODO-Cleanup: it appears this is unused (always true)
siScope * scPrev;
siScope * scNext;
};
siScope siOpenScopeList, siScopeList,
* siOpenScopeLast, * siScopeLast;
unsigned siScopeCnt;
VARSET_TP siLastLife; // Life at last call to siUpdate()
// Tracks the last entry for each tracked register variable
siScope * siLatestTrackedScopes[lclMAX_TRACKED];
IL_OFFSET siLastEndOffs; // IL offset of the (exclusive) end of the last block processed
#if FEATURE_EH_FUNCLETS
bool siInFuncletRegion; // Have we seen the start of the funclet region?
#endif // FEATURE_EH_FUNCLETS
// Functions
siScope * siNewScope (unsigned LVnum,
unsigned varNum);
void siRemoveFromOpenScopeList(siScope * scope);
void siEndTrackedScope (unsigned varIndex);
void siEndScope (unsigned varNum);
void siEndScope (siScope * scope);
#ifdef DEBUG
bool siVerifyLocalVarTab ();
#endif
#ifdef LATE_DISASM
public:
/* virtual */
const char* siRegVarName (size_t offs,
size_t size,
unsigned reg);
/* virtual */
const char* siStackVarName (size_t offs,
size_t size,
unsigned reg,
unsigned stkOffs);
#endif // LATE_DISASM
public :
/*
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XX XX
XX PrologScopeInfo XX
XX XX
XX We need special handling in the prolog block, as the parameter variables XX
XX may not be in the same position described by genLclVarTable - they all XX
XX start out on the stack XX
XX XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
*/
public :
void psiBegProlog ();
void psiAdjustStackLevel(unsigned size);
void psiMoveESPtoEBP ();
void psiMoveToReg (unsigned varNum,
regNumber reg = REG_NA,
regNumber otherReg = REG_NA);
void psiMoveToStack (unsigned varNum);
void psiEndProlog ();
/**************************************************************************
* PROTECTED
*************************************************************************/
protected :
struct psiScope
{
emitLocation scStartLoc; // emitter location of start of scope
emitLocation scEndLoc; // emitter location of end of scope
unsigned scSlotNum; // index into lclVarTab
unsigned scLVnum; // 'which' in eeGetLVinfo()
bool scRegister;
union
{
struct
{
regNumberSmall scRegNum;
regNumberSmall scOtherReg; // used for "other half" of long var
} u1;
struct
{
regNumberSmall scBaseReg;
NATIVE_OFFSET scOffset;
} u2;
};
psiScope * scPrev;
psiScope * scNext;
};
psiScope psiOpenScopeList, psiScopeList,
* psiOpenScopeLast, * psiScopeLast;
unsigned psiScopeCnt;
// Implementation Functions
psiScope * psiNewPrologScope(unsigned LVnum,
unsigned slotNum);
void psiEndPrologScope(psiScope * scope);
/*****************************************************************************
* TrnslLocalVarInfo
*
* This struct holds the LocalVarInfo in terms of the generated native code
* after a call to genSetScopeInfo()
*/
#ifdef DEBUG
struct TrnslLocalVarInfo
{
unsigned tlviVarNum;
unsigned tlviLVnum;
VarName tlviName;
UNATIVE_OFFSET tlviStartPC;
size_t tlviLength;
bool tlviAvailable;
Compiler::siVarLoc tlviVarLoc;
};
// Array of scopes of LocalVars in terms of native code
TrnslLocalVarInfo * genTrnslLocalVarInfo;
unsigned genTrnslLocalVarCount;
#endif
/*****************************************************************************/
#endif // DEBUGGING_SUPPORT
/*****************************************************************************/
#ifndef LEGACY_BACKEND
#include "codegenlinear.h"
#else // LEGACY_BACKEND
#include "codegenclassic.h"
#endif // LEGACY_BACKEND
/*
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XX XX
XX Instruction XX
XX XX
XX The interface to generate a machine-instruction. XX
XX Currently specific to x86 XX
XX TODO-Cleanup: Consider factoring this out of CodeGen XX
XX XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
*/
public :
void instInit();
#ifdef LEGACY_BACKEND
regNumber genIsEnregisteredIntVariable(GenTreePtr tree);
#endif // LEGACY_BACKEND
regNumber genGetZeroRegister();
void instGen (instruction ins);
#ifdef _TARGET_XARCH_
void instNop (unsigned size);
#endif
void inst_JMP (emitJumpKind jmp,
BasicBlock * tgtBlock);
void inst_SET (emitJumpKind condition,
regNumber reg);
void inst_RV (instruction ins,
regNumber reg,
var_types type,
emitAttr size = EA_UNKNOWN);
void inst_RV_RV (instruction ins,
regNumber reg1,
regNumber reg2,
var_types type = TYP_I_IMPL,
emitAttr size = EA_UNKNOWN,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_RV_RV_RV (instruction ins,
regNumber reg1,
regNumber reg2,
regNumber reg3,
emitAttr size,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_IV (instruction ins,
int val);
void inst_IV_handle (instruction ins,
int val);
void inst_FS (instruction ins, unsigned stk = 0);
void inst_RV_IV (instruction ins,
regNumber reg,
ssize_t val,
emitAttr size,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_ST_RV (instruction ins,
TempDsc * tmp,
unsigned ofs,
regNumber reg,
var_types type);
void inst_ST_IV (instruction ins,
TempDsc * tmp,
unsigned ofs,
int val,
var_types type);
void inst_SA_RV (instruction ins,
unsigned ofs,
regNumber reg,
var_types type);
void inst_SA_IV (instruction ins,
unsigned ofs,
int val,
var_types type);
void inst_RV_ST (instruction ins,
regNumber reg,
TempDsc * tmp,
unsigned ofs,
var_types type,
emitAttr size = EA_UNKNOWN);
void inst_FS_ST (instruction ins,
emitAttr size,
TempDsc * tmp,
unsigned ofs);
void instEmit_indCall(GenTreePtr call,
size_t argSize,
emitAttr retSize);
void instEmit_RM (instruction ins,
GenTreePtr tree,
GenTreePtr addr,
unsigned offs);
void instEmit_RM_RV (instruction ins,
emitAttr size,
GenTreePtr tree,
regNumber reg,
unsigned offs);
void instEmit_RV_RM (instruction ins,
emitAttr size,
regNumber reg,
GenTreePtr tree,
unsigned offs);
void instEmit_RV_RIA (instruction ins,
regNumber reg1,
regNumber reg2,
unsigned offs);
void inst_TT (instruction ins,
GenTreePtr tree,
unsigned offs = 0,
int shfv = 0,
emitAttr size = EA_UNKNOWN);
void inst_TT_RV (instruction ins,
GenTreePtr tree,
regNumber reg,
unsigned offs = 0,
emitAttr size = EA_UNKNOWN,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_TT_IV (instruction ins,
GenTreePtr tree,
ssize_t val,
unsigned offs = 0,
emitAttr size = EA_UNKNOWN,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_RV_AT (instruction ins,
emitAttr size,
var_types type,
regNumber reg,
GenTreePtr tree,
unsigned offs = 0,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_AT_IV (instruction ins,
emitAttr size,
GenTreePtr baseTree,
int icon,
unsigned offs = 0);
void inst_RV_TT (instruction ins,
regNumber reg,
GenTreePtr tree,
unsigned offs = 0,
emitAttr size = EA_UNKNOWN,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_RV_TT_IV (instruction ins,
regNumber reg,
GenTreePtr tree,
int val);
void inst_FS_TT (instruction ins,
GenTreePtr tree);
void inst_RV_SH (instruction ins,
emitAttr size,
regNumber reg,
unsigned val,
insFlags flags = INS_FLAGS_DONT_CARE);
void inst_TT_SH (instruction ins,