2 //***************************************************************************
7 // This file defines stuff that is to be private to the Sparc
8 // backend, but is shared among different portions of the backend.
9 //**************************************************************************/
12 #ifndef SPARC_INTERNALS_H
13 #define SPARC_INTERNALS_H
16 #include "SparcRegClassInfo.h"
17 #include "llvm/Target/TargetMachine.h"
18 #include "llvm/Target/MachineInstrInfo.h"
19 #include "llvm/Target/MachineSchedInfo.h"
20 #include "llvm/Target/MachineFrameInfo.h"
21 #include "llvm/Target/MachineCacheInfo.h"
22 #include "llvm/CodeGen/RegClass.h"
23 #include "llvm/Type.h"
25 #include <sys/types.h>
29 // OpCodeMask definitions for the Sparc V9
31 const OpCodeMask Immed = 0x00002000; // immed or reg operand?
32 const OpCodeMask Annul = 0x20000000; // annul delay instr?
33 const OpCodeMask PredictTaken = 0x00080000; // predict branch taken?
36 enum SparcInstrSchedClass {
37 SPARC_NONE, /* Instructions with no scheduling restrictions */
38 SPARC_IEUN, /* Integer class that can use IEU0 or IEU1 */
39 SPARC_IEU0, /* Integer class IEU0 */
40 SPARC_IEU1, /* Integer class IEU1 */
41 SPARC_FPM, /* FP Multiply or Divide instructions */
42 SPARC_FPA, /* All other FP instructions */
43 SPARC_CTI, /* Control-transfer instructions */
44 SPARC_LD, /* Load instructions */
45 SPARC_ST, /* Store instructions */
46 SPARC_SINGLE, /* Instructions that must issue by themselves */
48 SPARC_INV, /* This should stay at the end for the next value */
49 SPARC_NUM_SCHED_CLASSES = SPARC_INV
53 //---------------------------------------------------------------------------
54 // enum SparcMachineOpCode.
55 // const MachineInstrDescriptor SparcMachineInstrDesc[]
58 // Description of UltraSparc machine instructions.
60 //---------------------------------------------------------------------------
62 enum SparcMachineOpCode {
63 #define I(ENUM, OPCODESTRING, NUMOPERANDS, RESULTPOS, MAXIMM, IMMSE, \
64 NUMDELAYSLOTS, LATENCY, SCHEDCLASS, INSTFLAGS) \
66 #include "SparcInstr.def"
68 // End-of-array marker
70 NUM_REAL_OPCODES = PHI, // number of valid opcodes
71 NUM_TOTAL_OPCODES = INVALID_OPCODE
75 // Array of machine instruction descriptions...
76 extern const MachineInstrDescriptor SparcMachineInstrDesc[];
79 //---------------------------------------------------------------------------
80 // class UltraSparcInstrInfo
83 // Information about individual instructions.
84 // Most information is stored in the SparcMachineInstrDesc array above.
85 // Other information is computed on demand, and most such functions
86 // default to member functions in base class MachineInstrInfo.
87 //---------------------------------------------------------------------------
89 class UltraSparcInstrInfo : public MachineInstrInfo {
91 /*ctor*/ UltraSparcInstrInfo(const TargetMachine& tgt);
94 // All immediate constants are in position 0 except the
95 // store instructions.
97 virtual int getImmmedConstantPos(MachineOpCode opCode) const {
99 if (this->maxImmedConstant(opCode, ignore) != 0)
101 assert(! this->isStore((MachineOpCode) STB - 1)); // first store is STB
102 assert(! this->isStore((MachineOpCode) STD + 1)); // last store is STD
103 return (opCode >= STB || opCode <= STD)? 2 : 1;
109 virtual bool hasResultInterlock (MachineOpCode opCode) const
111 // All UltraSPARC instructions have interlocks (note that delay slots
112 // are not considered here).
113 // However, instructions that use the result of an FCMP produce a
114 // 9-cycle stall if they are issued less than 3 cycles after the FCMP.
115 // Force the compiler to insert a software interlock (i.e., gap of
116 // 2 other groups, including NOPs if necessary).
117 return (opCode == FCMPS || opCode == FCMPD || opCode == FCMPQ);
120 //-------------------------------------------------------------------------
121 // Code generation support for creating individual machine instructions
122 //-------------------------------------------------------------------------
124 // Create an instruction sequence to put the constant `val' into
125 // the virtual register `dest'. The generated instructions are
126 // returned in `minstrVec'. Any temporary registers (TmpInstruction)
127 // created are returned in `tempVec'.
129 virtual void CreateCodeToLoadConst(Value* val,
131 std::vector<MachineInstr*>& minstrVec,
132 std::vector<TmpInstruction*>& tmp) const;
135 // Create an instruction sequence to copy an integer value `val'
136 // to a floating point value `dest' by copying to memory and back.
137 // val must be an integral type. dest must be a Float or Double.
138 // The generated instructions are returned in `minstrVec'.
139 // Any temp. registers (TmpInstruction) created are returned in `tempVec'.
141 virtual void CreateCodeToCopyIntToFloat(Method* method,
144 std::vector<MachineInstr*>& minstr,
145 std::vector<TmpInstruction*>& temp,
146 TargetMachine& target) const;
148 // Similarly, create an instruction sequence to copy an FP value
149 // `val' to an integer value `dest' by copying to memory and back.
150 // See the previous function for information about return values.
152 virtual void CreateCodeToCopyFloatToInt(Method* method,
155 std::vector<MachineInstr*>& minstr,
156 std::vector<TmpInstruction*>& temp,
157 TargetMachine& target) const;
159 // create copy instruction(s)
161 CreateCopyInstructionsByType(const TargetMachine& target,
164 std::vector<MachineInstr*>& minstr) const;
170 //----------------------------------------------------------------------------
171 // class UltraSparcRegInfo
173 // This class implements the virtual class MachineRegInfo for Sparc.
175 //----------------------------------------------------------------------------
183 class UltraSparcRegInfo : public MachineRegInfo
187 // The actual register classes in the Sparc
190 IntRegClassID, // Integer
191 FloatRegClassID, // Float (both single/double)
192 IntCCRegClassID, // Int Condition Code
193 FloatCCRegClassID // Float Condition code
197 // Type of registers available in Sparc. There can be several reg types
198 // in the same class. For instace, the float reg class has Single/Double
209 // **** WARNING: If the above enum order is changed, also modify
210 // getRegisterClassOfValue method below since it assumes this particular
211 // order for efficiency.
214 // reverse pointer to get info about the ultra sparc machine
216 const UltraSparc *const UltraSparcInfo;
218 // Number of registers used for passing int args (usually 6: %o0 - %o5)
220 unsigned const NumOfIntArgRegs;
222 // Number of registers used for passing float args (usually 32: %f0 - %f31)
224 unsigned const NumOfFloatArgRegs;
226 // An out of bound register number that can be used to initialize register
227 // numbers. Useful for error detection.
229 int const InvalidRegNum;
232 // ======================== Private Methods =============================
234 // The following methods are used to color special live ranges (e.g.
235 // method args and return values etc.) with specific hardware registers
236 // as required. See SparcRegInfo.cpp for the implementation.
238 void setCallOrRetArgCol(LiveRange *const LR, const unsigned RegNo,
239 const MachineInstr *MI,AddedInstrMapType &AIMap)const;
241 MachineInstr * getCopy2RegMI(const Value *SrcVal, const unsigned Reg,
242 unsigned RegClassID) const ;
244 void suggestReg4RetAddr(const MachineInstr * RetMI,
245 LiveRangeInfo& LRI) const;
247 void suggestReg4CallAddr(const MachineInstr * CallMI, LiveRangeInfo& LRI,
248 std::vector<RegClass *> RCList) const;
252 // The following methods are used to find the addresses etc. contained
253 // in specail machine instructions like CALL/RET
255 Value *getValue4ReturnAddr( const MachineInstr * MInst ) const ;
256 const Value *getCallInstRetAddr(const MachineInstr *CallMI) const;
257 const unsigned getCallInstNumArgs(const MachineInstr *CallMI) const;
260 // The following 3 methods are used to find the RegType (see enum above)
261 // of a LiveRange, Value and using the unified RegClassID
263 int getRegType(const LiveRange *const LR) const {
267 switch( (LR->getRegClass())->getID() ) {
269 case IntRegClassID: return IntRegType;
271 case FloatRegClassID:
272 Typ = LR->getTypeID();
273 if( Typ == Type::FloatTyID )
274 return FPSingleRegType;
275 else if( Typ == Type::DoubleTyID )
276 return FPDoubleRegType;
277 else assert(0 && "Unknown type in FloatRegClass");
279 case IntCCRegClassID: return IntCCRegType;
281 case FloatCCRegClassID: return FloatCCRegType ;
283 default: assert( 0 && "Unknown reg class ID");
289 int getRegType(const Value *const Val) const {
293 switch( getRegClassIDOfValue(Val) ) {
295 case IntRegClassID: return IntRegType;
297 case FloatRegClassID:
298 Typ = (Val->getType())->getPrimitiveID();
299 if( Typ == Type::FloatTyID )
300 return FPSingleRegType;
301 else if( Typ == Type::DoubleTyID )
302 return FPDoubleRegType;
303 else assert(0 && "Unknown type in FloatRegClass");
305 case IntCCRegClassID: return IntCCRegType;
307 case FloatCCRegClassID: return FloatCCRegType ;
309 default: assert( 0 && "Unknown reg class ID");
316 int getRegType(int reg) const {
319 else if ( reg < (32 + 32) )
320 return FPSingleRegType;
321 else if ( reg < (64 + 32) )
322 return FPDoubleRegType;
323 else if( reg < (64+32+4) )
324 return FloatCCRegType;
325 else if( reg < (64+32+4+2) )
328 assert(0 && "Invalid register number in getRegType");
334 // The following methods are used to generate copy instructions to move
335 // data between condition code registers
337 MachineInstr * cpCCR2IntMI(const unsigned IntReg) const;
338 MachineInstr * cpInt2CCRMI(const unsigned IntReg) const;
340 // Used to generate a copy instruction based on the register class of
343 MachineInstr * cpValue2RegMI(Value * Val, const unsigned DestReg,
344 const int RegType) const;
347 // The following 2 methods are used to order the instructions addeed by
348 // the register allocator in association with method calling. See
349 // SparcRegInfo.cpp for more details
351 void moveInst2OrdVec(std::vector<MachineInstr *> &OrdVec,
352 MachineInstr *UnordInst,
353 PhyRegAlloc &PRA) const;
355 void OrderAddedInstrns(std::vector<MachineInstr *> &UnordVec,
356 std::vector<MachineInstr *> &OrdVec,
357 PhyRegAlloc &PRA) const;
360 // To find whether a particular call is to a var arg method
362 bool isVarArgCall(const MachineInstr *CallMI) const;
370 UltraSparcRegInfo(const TargetMachine& tgt ) :
372 UltraSparcInfo(& (const UltraSparc&) tgt),
374 NumOfFloatArgRegs(32),
375 InvalidRegNum(1000) {
377 MachineRegClassArr.push_back( new SparcIntRegClass(IntRegClassID) );
378 MachineRegClassArr.push_back( new SparcFloatRegClass(FloatRegClassID) );
379 MachineRegClassArr.push_back( new SparcIntCCRegClass(IntCCRegClassID) );
380 MachineRegClassArr.push_back( new SparcFloatCCRegClass(FloatCCRegClassID));
382 assert( SparcFloatRegOrder::StartOfNonVolatileRegs == 32 &&
383 "32 Float regs are used for float arg passing");
388 ~UltraSparcRegInfo(void) { } // empty destructor
391 // To get complete machine information structure using the machine register
394 inline const UltraSparc & getUltraSparcInfo() const {
395 return *UltraSparcInfo;
399 // To find the register class of a Value
401 inline unsigned getRegClassIDOfValue (const Value *const Val,
402 bool isCCReg = false) const {
404 Type::PrimitiveID ty = (Val->getType())->getPrimitiveID();
408 if( (ty && ty <= Type::LongTyID) || (ty == Type::LabelTyID) ||
409 (ty == Type::MethodTyID) || (ty == Type::PointerTyID) )
410 res = IntRegClassID; // sparc int reg (ty=0: void)
411 else if( ty <= Type::DoubleTyID)
412 res = FloatRegClassID; // sparc float reg class
414 std::cerr << "TypeID: " << ty << "\n";
415 assert(0 && "Cannot resolve register class for type");
420 return res + 2; // corresponidng condition code regiser
427 // returns the register that contains always zero
428 // this is the unified register number
430 inline int getZeroRegNum() const { return SparcIntRegOrder::g0; }
432 // returns the reg used for pushing the address when a method is called.
433 // This can be used for other purposes between calls
435 unsigned getCallAddressReg() const { return SparcIntRegOrder::o7; }
437 // Returns the register containing the return address.
438 // It should be made sure that this register contains the return
439 // value when a return instruction is reached.
441 unsigned getReturnAddressReg() const { return SparcIntRegOrder::i7; }
445 // The following methods are used to color special live ranges (e.g.
446 // method args and return values etc.) with specific hardware registers
447 // as required. See SparcRegInfo.cpp for the implementation for Sparc.
449 void suggestRegs4MethodArgs(const Method *const Meth,
450 LiveRangeInfo& LRI) const;
452 void suggestRegs4CallArgs(const MachineInstr *const CallMI,
454 std::vector<RegClass *> RCL) const;
456 void suggestReg4RetValue(const MachineInstr *const RetMI,
457 LiveRangeInfo& LRI) const;
460 void colorMethodArgs(const Method *const Meth, LiveRangeInfo& LRI,
461 AddedInstrns *const FirstAI) const;
463 void colorCallArgs(const MachineInstr *const CallMI, LiveRangeInfo& LRI,
464 AddedInstrns *const CallAI, PhyRegAlloc &PRA,
465 const BasicBlock *BB) const;
467 void colorRetValue(const MachineInstr *const RetI, LiveRangeInfo& LRI,
468 AddedInstrns *const RetAI) const;
472 // method used for printing a register for debugging purposes
474 static void printReg(const LiveRange *const LR) ;
476 // this method provides a unique number for each register
478 inline int getUnifiedRegNum(int RegClassID, int reg) const {
480 if( RegClassID == IntRegClassID && reg < 32 )
482 else if ( RegClassID == FloatRegClassID && reg < 64)
483 return reg + 32; // we have 32 int regs
484 else if( RegClassID == FloatCCRegClassID && reg < 4)
485 return reg + 32 + 64; // 32 int, 64 float
486 else if( RegClassID == IntCCRegClassID )
487 return 4+ 32 + 64; // only int cc reg
488 else if (reg==InvalidRegNum)
489 return InvalidRegNum;
491 assert(0 && "Invalid register class or reg number");
495 // given the unified register number, this gives the name
496 // for generating assembly code or debugging.
498 inline const std::string getUnifiedRegName(int reg) const {
500 return SparcIntRegOrder::getRegName(reg);
501 else if ( reg < (64 + 32) )
502 return SparcFloatRegOrder::getRegName( reg - 32);
503 else if( reg < (64+32+4) )
504 return SparcFloatCCRegOrder::getRegName( reg -32 - 64);
505 else if( reg < (64+32+4+2) ) // two names: %xcc and %ccr
506 return SparcIntCCRegOrder::getRegName( reg -32 - 64 - 4);
507 else if (reg== InvalidRegNum) //****** TODO: Remove */
510 assert(0 && "Invalid register number");
516 // The fllowing methods are used by instruction selection
518 inline unsigned getRegNumInCallersWindow(int reg) {
519 if (reg == InvalidRegNum || reg >= 32)
521 return SparcIntRegOrder::getRegNumInCallersWindow(reg);
524 inline bool mustBeRemappedInCallersWindow(int reg) {
525 return (reg != InvalidRegNum && reg < 32);
530 // returns the # of bytes of stack space allocated for each register
531 // type. For Sparc, currently we allocate 8 bytes on stack for all
532 // register types. We can optimize this later if necessary to save stack
533 // space (However, should make sure that stack alignment is correct)
535 inline int getSpilledRegSize(const int RegType) const {
540 // To obtain the return value contained in a CALL machine instruction
542 const Value * getCallInstRetVal(const MachineInstr *CallMI) const;
545 // The following methods are used to generate "copy" machine instructions
546 // for an architecture.
548 MachineInstr * cpReg2RegMI(const unsigned SrcReg, const unsigned DestReg,
549 const int RegType) const;
551 MachineInstr * cpReg2MemMI(const unsigned SrcReg, const unsigned DestPtrReg,
552 const int Offset, const int RegType) const;
554 MachineInstr * cpMem2RegMI(const unsigned SrcPtrReg, const int Offset,
555 const unsigned DestReg, const int RegType) const;
557 MachineInstr* cpValue2Value(Value *Src, Value *Dest) const;
560 // To see whether a register is a volatile (i.e., whehter it must be
561 // preserved acorss calls)
563 inline bool isRegVolatile(const int RegClassID, const int Reg) const {
564 return (MachineRegClassArr[RegClassID])->isRegVolatile(Reg);
568 inline unsigned getFramePointer() const {
569 return SparcIntRegOrder::i6;
572 inline unsigned getStackPointer() const {
573 return SparcIntRegOrder::o6;
576 inline int getInvalidRegNum() const {
577 return InvalidRegNum;
582 // This method inserts the caller saving code for call instructions
584 void insertCallerSavingCode(const MachineInstr *MInst,
585 const BasicBlock *BB, PhyRegAlloc &PRA ) const;
591 /*---------------------------------------------------------------------------
592 Scheduling guidelines for SPARC IIi:
594 I-Cache alignment rules (pg 326)
595 -- Align a branch target instruction so that it's entire group is within
596 the same cache line (may be 1-4 instructions).
597 ** Don't let a branch that is predicted taken be the last instruction
598 on an I-cache line: delay slot will need an entire line to be fetched
599 -- Make a FP instruction or a branch be the 4th instruction in a group.
600 For branches, there are tradeoffs in reordering to make this happen
602 ** Don't put a branch in a group that crosses a 32-byte boundary!
603 An artificial branch is inserted after every 32 bytes, and having
604 another branch will force the group to be broken into 2 groups.
607 -- Don't let a loop span two memory pages, if possible
609 Branch prediction performance:
610 -- Don't make the branch in a delay slot the target of a branch
611 -- Try not to have 2 predicted branches within a group of 4 instructions
612 (because each such group has a single branch target field).
613 -- Try to align branches in slots 0, 2, 4 or 6 of a cache line (to avoid
614 the wrong prediction bits being used in some cases).
616 D-Cache timing constraints:
617 -- Signed int loads of less than 64 bits have 3 cycle latency, not 2
618 -- All other loads that hit in D-Cache have 2 cycle latency
619 -- All loads are returned IN ORDER, so a D-Cache miss will delay a later hit
620 -- Mis-aligned loads or stores cause a trap. In particular, replace
621 mis-aligned FP double precision l/s with 2 single-precision l/s.
622 -- Simulations of integer codes show increase in avg. group size of
623 33% when code (including esp. non-faulting loads) is moved across
624 one branch, and 50% across 2 branches.
626 E-Cache timing constraints:
627 -- Scheduling for E-cache (D-Cache misses) is effective (due to load buffering)
629 Store buffer timing constraints:
630 -- Stores can be executed in same cycle as instruction producing the value
631 -- Stores are buffered and have lower priority for E-cache until
632 highwater mark is reached in the store buffer (5 stores)
634 Pipeline constraints:
635 -- Shifts can only use IEU0.
636 -- CC setting instructions can only use IEU1.
637 -- Several other instructions must only use IEU1:
638 EDGE(?), ARRAY(?), CALL, JMPL, BPr, PST, and FCMP.
639 -- Two instructions cannot store to the same register file in a single cycle
640 (single write port per file).
642 Issue and grouping constraints:
643 -- FP and branch instructions must use slot 4.
644 -- Shift instructions cannot be grouped with other IEU0-specific instructions.
645 -- CC setting instructions cannot be grouped with other IEU1-specific instrs.
646 -- Several instructions must be issued in a single-instruction group:
647 MOVcc or MOVr, MULs/x and DIVs/x, SAVE/RESTORE, many others
648 -- A CALL or JMPL breaks a group, ie, is not combined with subsequent instrs.
652 Branch delay slot scheduling rules:
653 -- A CTI couple (two back-to-back CTI instructions in the dynamic stream)
654 has a 9-instruction penalty: the entire pipeline is flushed when the
655 second instruction reaches stage 9 (W-Writeback).
656 -- Avoid putting multicycle instructions, and instructions that may cause
657 load misses, in the delay slot of an annulling branch.
658 -- Avoid putting WR, SAVE..., RESTORE and RETURN instructions in the
659 delay slot of an annulling branch.
661 *--------------------------------------------------------------------------- */
663 //---------------------------------------------------------------------------
664 // List of CPUResources for UltraSPARC IIi.
665 //---------------------------------------------------------------------------
667 const CPUResource AllIssueSlots( "All Instr Slots", 4);
668 const CPUResource IntIssueSlots( "Int Instr Slots", 3);
669 const CPUResource First3IssueSlots("Instr Slots 0-3", 3);
670 const CPUResource LSIssueSlots( "Load-Store Instr Slot", 1);
671 const CPUResource CTIIssueSlots( "Ctrl Transfer Instr Slot", 1);
672 const CPUResource FPAIssueSlots( "Int Instr Slot 1", 1);
673 const CPUResource FPMIssueSlots( "Int Instr Slot 1", 1);
675 // IEUN instructions can use either Alu and should use IAluN.
676 // IEU0 instructions must use Alu 1 and should use both IAluN and IAlu0.
677 // IEU1 instructions must use Alu 2 and should use both IAluN and IAlu1.
678 const CPUResource IAluN("Int ALU 1or2", 2);
679 const CPUResource IAlu0("Int ALU 1", 1);
680 const CPUResource IAlu1("Int ALU 2", 1);
682 const CPUResource LSAluC1("Load/Store Unit Addr Cycle", 1);
683 const CPUResource LSAluC2("Load/Store Unit Issue Cycle", 1);
684 const CPUResource LdReturn("Load Return Unit", 1);
686 const CPUResource FPMAluC1("FP Mul/Div Alu Cycle 1", 1);
687 const CPUResource FPMAluC2("FP Mul/Div Alu Cycle 2", 1);
688 const CPUResource FPMAluC3("FP Mul/Div Alu Cycle 3", 1);
690 const CPUResource FPAAluC1("FP Other Alu Cycle 1", 1);
691 const CPUResource FPAAluC2("FP Other Alu Cycle 2", 1);
692 const CPUResource FPAAluC3("FP Other Alu Cycle 3", 1);
694 const CPUResource IRegReadPorts("Int Reg ReadPorts", INT_MAX); // CHECK
695 const CPUResource IRegWritePorts("Int Reg WritePorts", 2); // CHECK
696 const CPUResource FPRegReadPorts("FP Reg Read Ports", INT_MAX); // CHECK
697 const CPUResource FPRegWritePorts("FP Reg Write Ports", 1); // CHECK
699 const CPUResource CTIDelayCycle( "CTI delay cycle", 1);
700 const CPUResource FCMPDelayCycle("FCMP delay cycle", 1);
703 //---------------------------------------------------------------------------
704 // const InstrClassRUsage SparcRUsageDesc[]
707 // Resource usage information for instruction in each scheduling class.
708 // The InstrRUsage Objects for individual classes are specified first.
709 // Note that fetch and decode are decoupled from the execution pipelines
710 // via an instr buffer, so they are not included in the cycles below.
711 //---------------------------------------------------------------------------
713 const InstrClassRUsage NoneClassRUsage = {
718 /* isSingleIssue */ false,
719 /* breaksGroup */ false,
723 /* feasibleSlots[] */ { 0, 1, 2, 3 },
737 const InstrClassRUsage IEUNClassRUsage = {
742 /* isSingleIssue */ false,
743 /* breaksGroup */ false,
747 /* feasibleSlots[] */ { 0, 1, 2 },
751 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
752 { IntIssueSlots.rid, 0, 1 },
753 /*Cycle E */ { IAluN.rid, 1, 1 },
758 /*Cycle W */ { IRegWritePorts.rid, 6, 1 }
762 const InstrClassRUsage IEU0ClassRUsage = {
767 /* isSingleIssue */ false,
768 /* breaksGroup */ false,
772 /* feasibleSlots[] */ { 0, 1, 2 },
776 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
777 { IntIssueSlots.rid, 0, 1 },
778 /*Cycle E */ { IAluN.rid, 1, 1 },
784 /*Cycle W */ { IRegWritePorts.rid, 6, 1 }
788 const InstrClassRUsage IEU1ClassRUsage = {
793 /* isSingleIssue */ false,
794 /* breaksGroup */ false,
798 /* feasibleSlots[] */ { 0, 1, 2 },
802 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
803 { IntIssueSlots.rid, 0, 1 },
804 /*Cycle E */ { IAluN.rid, 1, 1 },
810 /*Cycle W */ { IRegWritePorts.rid, 6, 1 }
814 const InstrClassRUsage FPMClassRUsage = {
819 /* isSingleIssue */ false,
820 /* breaksGroup */ false,
824 /* feasibleSlots[] */ { 0, 1, 2, 3 },
828 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
829 { FPMIssueSlots.rid, 0, 1 },
830 /*Cycle E */ { FPRegReadPorts.rid, 1, 1 },
831 /*Cycle C */ { FPMAluC1.rid, 2, 1 },
832 /*Cycle N1*/ { FPMAluC2.rid, 3, 1 },
833 /*Cycle N1*/ { FPMAluC3.rid, 4, 1 },
835 /*Cycle W */ { FPRegWritePorts.rid, 6, 1 }
839 const InstrClassRUsage FPAClassRUsage = {
844 /* isSingleIssue */ false,
845 /* breaksGroup */ false,
849 /* feasibleSlots[] */ { 0, 1, 2, 3 },
853 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
854 { FPAIssueSlots.rid, 0, 1 },
855 /*Cycle E */ { FPRegReadPorts.rid, 1, 1 },
856 /*Cycle C */ { FPAAluC1.rid, 2, 1 },
857 /*Cycle N1*/ { FPAAluC2.rid, 3, 1 },
858 /*Cycle N1*/ { FPAAluC3.rid, 4, 1 },
860 /*Cycle W */ { FPRegWritePorts.rid, 6, 1 }
864 const InstrClassRUsage LDClassRUsage = {
869 /* isSingleIssue */ false,
870 /* breaksGroup */ false,
874 /* feasibleSlots[] */ { 0, 1, 2, },
878 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
879 { First3IssueSlots.rid, 0, 1 },
880 { LSIssueSlots.rid, 0, 1 },
881 /*Cycle E */ { LSAluC1.rid, 1, 1 },
882 /*Cycle C */ { LSAluC2.rid, 2, 1 },
883 { LdReturn.rid, 2, 1 },
887 /*Cycle W */ { IRegWritePorts.rid, 6, 1 }
891 const InstrClassRUsage STClassRUsage = {
896 /* isSingleIssue */ false,
897 /* breaksGroup */ false,
901 /* feasibleSlots[] */ { 0, 1, 2 },
905 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
906 { First3IssueSlots.rid, 0, 1 },
907 { LSIssueSlots.rid, 0, 1 },
908 /*Cycle E */ { LSAluC1.rid, 1, 1 },
909 /*Cycle C */ { LSAluC2.rid, 2, 1 }
917 const InstrClassRUsage CTIClassRUsage = {
922 /* isSingleIssue */ false,
923 /* breaksGroup */ false,
927 /* feasibleSlots[] */ { 0, 1, 2, 3 },
931 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
932 { CTIIssueSlots.rid, 0, 1 },
933 /*Cycle E */ { IAlu0.rid, 1, 1 },
934 /*Cycles E-C */ { CTIDelayCycle.rid, 1, 2 }
943 const InstrClassRUsage SingleClassRUsage = {
948 /* isSingleIssue */ true,
949 /* breaksGroup */ false,
953 /* feasibleSlots[] */ { 0 },
957 /*Cycle G */ { AllIssueSlots.rid, 0, 1 },
958 { AllIssueSlots.rid, 0, 1 },
959 { AllIssueSlots.rid, 0, 1 },
960 { AllIssueSlots.rid, 0, 1 },
961 /*Cycle E */ { IAlu0.rid, 1, 1 }
971 const InstrClassRUsage SparcRUsageDesc[] = {
985 //---------------------------------------------------------------------------
986 // const InstrIssueDelta SparcInstrIssueDeltas[]
989 // Changes to issue restrictions information in InstrClassRUsage for
990 // instructions that differ from other instructions in their class.
991 //---------------------------------------------------------------------------
993 const InstrIssueDelta SparcInstrIssueDeltas[] = {
995 // opCode, isSingleIssue, breaksGroup, numBubbles
997 // Special cases for single-issue only
998 // Other single issue cases are below.
999 //{ LDDA, true, true, 0 },
1000 //{ STDA, true, true, 0 },
1001 //{ LDDF, true, true, 0 },
1002 //{ LDDFA, true, true, 0 },
1003 { ADDC, true, true, 0 },
1004 { ADDCcc, true, true, 0 },
1005 { SUBC, true, true, 0 },
1006 { SUBCcc, true, true, 0 },
1007 //{ LDSTUB, true, true, 0 },
1008 //{ SWAP, true, true, 0 },
1009 //{ SWAPA, true, true, 0 },
1010 //{ CAS, true, true, 0 },
1011 //{ CASA, true, true, 0 },
1012 //{ CASX, true, true, 0 },
1013 //{ CASXA, true, true, 0 },
1014 //{ LDFSR, true, true, 0 },
1015 //{ LDFSRA, true, true, 0 },
1016 //{ LDXFSR, true, true, 0 },
1017 //{ LDXFSRA, true, true, 0 },
1018 //{ STFSR, true, true, 0 },
1019 //{ STFSRA, true, true, 0 },
1020 //{ STXFSR, true, true, 0 },
1021 //{ STXFSRA, true, true, 0 },
1022 //{ SAVED, true, true, 0 },
1023 //{ RESTORED, true, true, 0 },
1024 //{ FLUSH, true, true, 9 },
1025 //{ FLUSHW, true, true, 9 },
1026 //{ ALIGNADDR, true, true, 0 },
1027 { RETURN, true, true, 0 },
1028 //{ DONE, true, true, 0 },
1029 //{ RETRY, true, true, 0 },
1030 //{ TCC, true, true, 0 },
1031 //{ SHUTDOWN, true, true, 0 },
1033 // Special cases for breaking group *before*
1034 // CURRENTLY NOT SUPPORTED!
1035 { CALL, false, false, 0 },
1036 { JMPLCALL, false, false, 0 },
1037 { JMPLRET, false, false, 0 },
1039 // Special cases for breaking the group *after*
1040 { MULX, true, true, (4+34)/2 },
1041 { FDIVS, false, true, 0 },
1042 { FDIVD, false, true, 0 },
1043 { FDIVQ, false, true, 0 },
1044 { FSQRTS, false, true, 0 },
1045 { FSQRTD, false, true, 0 },
1046 { FSQRTQ, false, true, 0 },
1047 //{ FCMP{LE,GT,NE,EQ}, false, true, 0 },
1049 // Instructions that introduce bubbles
1050 //{ MULScc, true, true, 2 },
1051 //{ SMULcc, true, true, (4+18)/2 },
1052 //{ UMULcc, true, true, (4+19)/2 },
1053 { SDIVX, true, true, 68 },
1054 { UDIVX, true, true, 68 },
1055 //{ SDIVcc, true, true, 36 },
1056 //{ UDIVcc, true, true, 37 },
1057 { WRCCR, true, true, 4 },
1058 //{ WRPR, true, true, 4 },
1059 //{ RDCCR, true, true, 0 }, // no bubbles after, but see below
1060 //{ RDPR, true, true, 0 },
1064 //---------------------------------------------------------------------------
1065 // const InstrRUsageDelta SparcInstrUsageDeltas[]
1068 // Changes to resource usage information in InstrClassRUsage for
1069 // instructions that differ from other instructions in their class.
1070 //---------------------------------------------------------------------------
1072 const InstrRUsageDelta SparcInstrUsageDeltas[] = {
1074 // MachineOpCode, Resource, Start cycle, Num cycles
1077 // JMPL counts as a load/store instruction for issue!
1079 { JMPLCALL, LSIssueSlots.rid, 0, 1 },
1080 { JMPLRET, LSIssueSlots.rid, 0, 1 },
1083 // Many instructions cannot issue for the next 2 cycles after an FCMP
1084 // We model that with a fake resource FCMPDelayCycle.
1086 { FCMPS, FCMPDelayCycle.rid, 1, 3 },
1087 { FCMPD, FCMPDelayCycle.rid, 1, 3 },
1088 { FCMPQ, FCMPDelayCycle.rid, 1, 3 },
1090 { MULX, FCMPDelayCycle.rid, 1, 1 },
1091 { SDIVX, FCMPDelayCycle.rid, 1, 1 },
1092 { UDIVX, FCMPDelayCycle.rid, 1, 1 },
1093 //{ SMULcc, FCMPDelayCycle.rid, 1, 1 },
1094 //{ UMULcc, FCMPDelayCycle.rid, 1, 1 },
1095 //{ SDIVcc, FCMPDelayCycle.rid, 1, 1 },
1096 //{ UDIVcc, FCMPDelayCycle.rid, 1, 1 },
1097 { STD, FCMPDelayCycle.rid, 1, 1 },
1098 { FMOVRSZ, FCMPDelayCycle.rid, 1, 1 },
1099 { FMOVRSLEZ,FCMPDelayCycle.rid, 1, 1 },
1100 { FMOVRSLZ, FCMPDelayCycle.rid, 1, 1 },
1101 { FMOVRSNZ, FCMPDelayCycle.rid, 1, 1 },
1102 { FMOVRSGZ, FCMPDelayCycle.rid, 1, 1 },
1103 { FMOVRSGEZ,FCMPDelayCycle.rid, 1, 1 },
1106 // Some instructions are stalled in the GROUP stage if a CTI is in
1107 // the E or C stage. We model that with a fake resource CTIDelayCycle.
1109 { LDD, CTIDelayCycle.rid, 1, 1 },
1110 //{ LDDA, CTIDelayCycle.rid, 1, 1 },
1111 //{ LDDSTUB, CTIDelayCycle.rid, 1, 1 },
1112 //{ LDDSTUBA, CTIDelayCycle.rid, 1, 1 },
1113 //{ SWAP, CTIDelayCycle.rid, 1, 1 },
1114 //{ SWAPA, CTIDelayCycle.rid, 1, 1 },
1115 //{ CAS, CTIDelayCycle.rid, 1, 1 },
1116 //{ CASA, CTIDelayCycle.rid, 1, 1 },
1117 //{ CASX, CTIDelayCycle.rid, 1, 1 },
1118 //{ CASXA, CTIDelayCycle.rid, 1, 1 },
1121 // Signed int loads of less than dword size return data in cycle N1 (not C)
1122 // and put all loads in consecutive cycles into delayed load return mode.
1124 { LDSB, LdReturn.rid, 2, -1 },
1125 { LDSB, LdReturn.rid, 3, 1 },
1127 { LDSH, LdReturn.rid, 2, -1 },
1128 { LDSH, LdReturn.rid, 3, 1 },
1130 { LDSW, LdReturn.rid, 2, -1 },
1131 { LDSW, LdReturn.rid, 3, 1 },
1134 // RDPR from certain registers and RD from any register are not dispatchable
1135 // until four clocks after they reach the head of the instr. buffer.
1136 // Together with their single-issue requirement, this means all four issue
1137 // slots are effectively blocked for those cycles, plus the issue cycle.
1138 // This does not increase the latency of the instruction itself.
1140 { RDCCR, AllIssueSlots.rid, 0, 5 },
1141 { RDCCR, AllIssueSlots.rid, 0, 5 },
1142 { RDCCR, AllIssueSlots.rid, 0, 5 },
1143 { RDCCR, AllIssueSlots.rid, 0, 5 },
1145 #undef EXPLICIT_BUBBLES_NEEDED
1146 #ifdef EXPLICIT_BUBBLES_NEEDED
1148 // MULScc inserts one bubble.
1149 // This means it breaks the current group (captured in UltraSparcSchedInfo)
1150 // *and occupies all issue slots for the next cycle
1152 //{ MULScc, AllIssueSlots.rid, 2, 2-1 },
1153 //{ MULScc, AllIssueSlots.rid, 2, 2-1 },
1154 //{ MULScc, AllIssueSlots.rid, 2, 2-1 },
1155 //{ MULScc, AllIssueSlots.rid, 2, 2-1 },
1158 // SMULcc inserts between 4 and 18 bubbles, depending on #leading 0s in rs1.
1159 // We just model this with a simple average.
1161 //{ SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 },
1162 //{ SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 },
1163 //{ SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 },
1164 //{ SMULcc, AllIssueSlots.rid, 2, ((4+18)/2)-1 },
1166 // SMULcc inserts between 4 and 19 bubbles, depending on #leading 0s in rs1.
1167 //{ UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 },
1168 //{ UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 },
1169 //{ UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 },
1170 //{ UMULcc, AllIssueSlots.rid, 2, ((4+19)/2)-1 },
1173 // MULX inserts between 4 and 34 bubbles, depending on #leading 0s in rs1.
1175 { MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 },
1176 { MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 },
1177 { MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 },
1178 { MULX, AllIssueSlots.rid, 2, ((4+34)/2)-1 },
1181 // SDIVcc inserts 36 bubbles.
1183 //{ SDIVcc, AllIssueSlots.rid, 2, 36-1 },
1184 //{ SDIVcc, AllIssueSlots.rid, 2, 36-1 },
1185 //{ SDIVcc, AllIssueSlots.rid, 2, 36-1 },
1186 //{ SDIVcc, AllIssueSlots.rid, 2, 36-1 },
1188 // UDIVcc inserts 37 bubbles.
1189 //{ UDIVcc, AllIssueSlots.rid, 2, 37-1 },
1190 //{ UDIVcc, AllIssueSlots.rid, 2, 37-1 },
1191 //{ UDIVcc, AllIssueSlots.rid, 2, 37-1 },
1192 //{ UDIVcc, AllIssueSlots.rid, 2, 37-1 },
1195 // SDIVX inserts 68 bubbles.
1197 { SDIVX, AllIssueSlots.rid, 2, 68-1 },
1198 { SDIVX, AllIssueSlots.rid, 2, 68-1 },
1199 { SDIVX, AllIssueSlots.rid, 2, 68-1 },
1200 { SDIVX, AllIssueSlots.rid, 2, 68-1 },
1203 // UDIVX inserts 68 bubbles.
1205 { UDIVX, AllIssueSlots.rid, 2, 68-1 },
1206 { UDIVX, AllIssueSlots.rid, 2, 68-1 },
1207 { UDIVX, AllIssueSlots.rid, 2, 68-1 },
1208 { UDIVX, AllIssueSlots.rid, 2, 68-1 },
1211 // WR inserts 4 bubbles.
1213 //{ WR, AllIssueSlots.rid, 2, 68-1 },
1214 //{ WR, AllIssueSlots.rid, 2, 68-1 },
1215 //{ WR, AllIssueSlots.rid, 2, 68-1 },
1216 //{ WR, AllIssueSlots.rid, 2, 68-1 },
1219 // WRPR inserts 4 bubbles.
1221 //{ WRPR, AllIssueSlots.rid, 2, 68-1 },
1222 //{ WRPR, AllIssueSlots.rid, 2, 68-1 },
1223 //{ WRPR, AllIssueSlots.rid, 2, 68-1 },
1224 //{ WRPR, AllIssueSlots.rid, 2, 68-1 },
1227 // DONE inserts 9 bubbles.
1229 //{ DONE, AllIssueSlots.rid, 2, 9-1 },
1230 //{ DONE, AllIssueSlots.rid, 2, 9-1 },
1231 //{ DONE, AllIssueSlots.rid, 2, 9-1 },
1232 //{ DONE, AllIssueSlots.rid, 2, 9-1 },
1235 // RETRY inserts 9 bubbles.
1237 //{ RETRY, AllIssueSlots.rid, 2, 9-1 },
1238 //{ RETRY, AllIssueSlots.rid, 2, 9-1 },
1239 //{ RETRY, AllIssueSlots.rid, 2, 9-1 },
1240 //{ RETRY, AllIssueSlots.rid, 2, 9-1 },
1242 #endif /*EXPLICIT_BUBBLES_NEEDED */
1247 // Additional delays to be captured in code:
1248 // 1. RDPR from several state registers (page 349)
1249 // 2. RD from *any* register (page 349)
1250 // 3. Writes to TICK, PSTATE, TL registers and FLUSH{W} instr (page 349)
1251 // 4. Integer store can be in same group as instr producing value to store.
1252 // 5. BICC and BPICC can be in the same group as instr producing CC (pg 350)
1253 // 6. FMOVr cannot be in the same or next group as an IEU instr (pg 351).
1254 // 7. The second instr. of a CTI group inserts 9 bubbles (pg 351)
1255 // 8. WR{PR}, SVAE, SAVED, RESTORE, RESTORED, RETURN, RETRY, and DONE that
1256 // follow an annulling branch cannot be issued in the same group or in
1257 // the 3 groups following the branch.
1258 // 9. A predicted annulled load does not stall dependent instructions.
1259 // Other annulled delay slot instructions *do* stall dependents, so
1260 // nothing special needs to be done for them during scheduling.
1261 //10. Do not put a load use that may be annulled in the same group as the
1262 // branch. The group will stall until the load returns.
1263 //11. Single-prec. FP loads lock 2 registers, for dependency checking.
1266 // Additional delays we cannot or will not capture:
1267 // 1. If DCTI is last word of cache line, it is delayed until next line can be
1268 // fetched. Also, other DCTI alignment-related delays (pg 352)
1269 // 2. Load-after-store is delayed by 7 extra cycles if load hits in D-Cache.
1270 // Also, several other store-load and load-store conflicts (pg 358)
1271 // 3. MEMBAR, LD{X}FSR, LDD{A} and a bunch of other load stalls (pg 358)
1272 // 4. There can be at most 8 outstanding buffered store instructions
1273 // (including some others like MEMBAR, LDSTUB, CAS{AX}, and FLUSH)
1277 //---------------------------------------------------------------------------
1278 // class UltraSparcSchedInfo
1281 // Interface to instruction scheduling information for UltraSPARC.
1282 // The parameter values above are based on UltraSPARC IIi.
1283 //---------------------------------------------------------------------------
1286 class UltraSparcSchedInfo: public MachineSchedInfo {
1288 /*ctor*/ UltraSparcSchedInfo (const TargetMachine& tgt);
1289 /*dtor*/ virtual ~UltraSparcSchedInfo () {}
1291 virtual void initializeResources ();
1295 //---------------------------------------------------------------------------
1296 // class UltraSparcFrameInfo
1299 // Interface to stack frame layout info for the UltraSPARC.
1300 // Starting offsets for each area of the stack frame are aligned at
1301 // a multiple of getStackFrameSizeAlignment().
1302 //---------------------------------------------------------------------------
1304 class UltraSparcFrameInfo: public MachineFrameInfo {
1306 /*ctor*/ UltraSparcFrameInfo(const TargetMachine& tgt) : MachineFrameInfo(tgt) {}
1309 int getStackFrameSizeAlignment () const { return StackFrameSizeAlignment;}
1310 int getMinStackFrameSize () const { return MinStackFrameSize; }
1311 int getNumFixedOutgoingArgs () const { return NumFixedOutgoingArgs; }
1312 int getSizeOfEachArgOnStack () const { return SizeOfEachArgOnStack; }
1313 bool argsOnStackHaveFixedSize () const { return true; }
1316 // These methods compute offsets using the frame contents for a
1317 // particular method. The frame contents are obtained from the
1318 // MachineCodeInfoForMethod object for the given method.
1320 int getFirstIncomingArgOffset (MachineCodeForMethod& mcInfo,
1323 pos = true; // arguments area grows upwards
1324 return FirstIncomingArgOffsetFromFP;
1326 int getFirstOutgoingArgOffset (MachineCodeForMethod& mcInfo,
1329 pos = true; // arguments area grows upwards
1330 return FirstOutgoingArgOffsetFromSP;
1332 int getFirstOptionalOutgoingArgOffset(MachineCodeForMethod& mcInfo,
1335 pos = true; // arguments area grows upwards
1336 return FirstOptionalOutgoingArgOffsetFromSP;
1339 int getFirstAutomaticVarOffset (MachineCodeForMethod& mcInfo,
1341 int getRegSpillAreaOffset (MachineCodeForMethod& mcInfo,
1343 int getTmpAreaOffset (MachineCodeForMethod& mcInfo,
1345 int getDynamicAreaOffset (MachineCodeForMethod& mcInfo,
1349 // These methods specify the base register used for each stack area
1350 // (generally FP or SP)
1352 virtual int getIncomingArgBaseRegNum() const {
1353 return (int) target.getRegInfo().getFramePointer();
1355 virtual int getOutgoingArgBaseRegNum() const {
1356 return (int) target.getRegInfo().getStackPointer();
1358 virtual int getOptionalOutgoingArgBaseRegNum() const {
1359 return (int) target.getRegInfo().getStackPointer();
1361 virtual int getAutomaticVarBaseRegNum() const {
1362 return (int) target.getRegInfo().getFramePointer();
1364 virtual int getRegSpillAreaBaseRegNum() const {
1365 return (int) target.getRegInfo().getFramePointer();
1367 virtual int getDynamicAreaBaseRegNum() const {
1368 return (int) target.getRegInfo().getStackPointer();
1372 // All stack addresses must be offset by 0x7ff (2047) on Sparc V9.
1373 static const int OFFSET = (int) 0x7ff;
1374 static const int StackFrameSizeAlignment = 16;
1375 static const int MinStackFrameSize = 176;
1376 static const int NumFixedOutgoingArgs = 6;
1377 static const int SizeOfEachArgOnStack = 8;
1378 static const int StaticAreaOffsetFromFP = 0 + OFFSET;
1379 static const int FirstIncomingArgOffsetFromFP = 128 + OFFSET;
1380 static const int FirstOptionalIncomingArgOffsetFromFP = 176 + OFFSET;
1381 static const int FirstOutgoingArgOffsetFromSP = 128 + OFFSET;
1382 static const int FirstOptionalOutgoingArgOffsetFromSP = 176 + OFFSET;
1386 //---------------------------------------------------------------------------
1387 // class UltraSparcCacheInfo
1390 // Interface to cache parameters for the UltraSPARC.
1391 // Just use defaults for now.
1392 //---------------------------------------------------------------------------
1394 class UltraSparcCacheInfo: public MachineCacheInfo {
1396 /*ctor*/ UltraSparcCacheInfo (const TargetMachine& target) :
1397 MachineCacheInfo(target) {}
1401 //---------------------------------------------------------------------------
1402 // class UltraSparcMachine
1405 // Primary interface to machine description for the UltraSPARC.
1406 // Primarily just initializes machine-dependent parameters in
1407 // class TargetMachine, and creates machine-dependent subclasses
1408 // for classes such as InstrInfo, SchedInfo and RegInfo.
1409 //---------------------------------------------------------------------------
1411 class UltraSparc : public TargetMachine {
1413 UltraSparcInstrInfo instrInfo;
1414 UltraSparcSchedInfo schedInfo;
1415 UltraSparcRegInfo regInfo;
1416 UltraSparcFrameInfo frameInfo;
1417 UltraSparcCacheInfo cacheInfo;
1420 virtual ~UltraSparc() {}
1422 virtual const MachineInstrInfo &getInstrInfo() const { return instrInfo; }
1423 virtual const MachineSchedInfo &getSchedInfo() const { return schedInfo; }
1424 virtual const MachineRegInfo &getRegInfo() const { return regInfo; }
1425 virtual const MachineFrameInfo &getFrameInfo() const { return frameInfo; }
1426 virtual const MachineCacheInfo &getCacheInfo() const { return cacheInfo; }
1428 // compileMethod - For the sparc, we do instruction selection, followed by
1429 // delay slot scheduling, then register allocation.
1431 virtual bool compileMethod(Method *M);
1434 // emitAssembly - Output assembly language code (a .s file) for the specified
1435 // module. The specified module must have been compiled before this may be
1438 virtual void emitAssembly(const Method *M, std::ostream &OutStr) const;
1441 // emitAssembly - Output assembly language code (a .s file) for global
1442 // components of the specified module. This assumes that methods have been
1443 // previously output.
1445 virtual void emitAssembly(const Module *M, std::ostream &OutStr) const;
1448 // freeCompiledMethod - Release all memory associated with the compiled image
1451 virtual void freeCompiledMethod(Method *M);