1 //===-- AlphaISelLowering.cpp - Alpha DAG Lowering Implementation ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Andrew Lenharth and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the AlphaISelLowering class.
12 //===----------------------------------------------------------------------===//
14 #include "AlphaISelLowering.h"
15 #include "AlphaTargetMachine.h"
16 #include "llvm/CodeGen/MachineFrameInfo.h"
17 #include "llvm/CodeGen/MachineFunction.h"
18 #include "llvm/CodeGen/MachineInstrBuilder.h"
19 #include "llvm/CodeGen/SelectionDAG.h"
20 #include "llvm/CodeGen/SSARegMap.h"
21 #include "llvm/Constants.h"
22 #include "llvm/Function.h"
23 #include "llvm/Module.h"
24 #include "llvm/Support/CommandLine.h"
29 /// AddLiveIn - This helper function adds the specified physical register to the
30 /// MachineFunction as a live in value. It also creates a corresponding virtual
32 static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
33 TargetRegisterClass *RC) {
34 assert(RC->contains(PReg) && "Not the correct regclass!");
35 unsigned VReg = MF.getSSARegMap()->createVirtualRegister(RC);
36 MF.addLiveIn(PReg, VReg);
40 AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM) : TargetLowering(TM) {
41 // Set up the TargetLowering object.
42 //I am having problems with shr n ubyte 1
43 setShiftAmountType(MVT::i64);
44 setSetCCResultType(MVT::i64);
45 setSetCCResultContents(ZeroOrOneSetCCResult);
47 setUsesGlobalOffsetTable(true);
49 addRegisterClass(MVT::i64, Alpha::GPRCRegisterClass);
50 addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
51 addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
53 setLoadXAction(ISD::EXTLOAD, MVT::i1, Promote);
54 setLoadXAction(ISD::EXTLOAD, MVT::f32, Expand);
56 setLoadXAction(ISD::ZEXTLOAD, MVT::i1, Promote);
57 setLoadXAction(ISD::ZEXTLOAD, MVT::i32, Expand);
59 setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
60 setLoadXAction(ISD::SEXTLOAD, MVT::i8, Expand);
61 setLoadXAction(ISD::SEXTLOAD, MVT::i16, Expand);
63 setStoreXAction(MVT::i1, Promote);
65 // setOperationAction(ISD::BRIND, MVT::Other, Expand);
66 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
67 setOperationAction(ISD::BR_CC, MVT::Other, Expand);
68 setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
70 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
72 setOperationAction(ISD::FREM, MVT::f32, Expand);
73 setOperationAction(ISD::FREM, MVT::f64, Expand);
75 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
76 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
77 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
78 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
80 if (!TM.getSubtarget<AlphaSubtarget>().hasCT()) {
81 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
82 setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
83 setOperationAction(ISD::CTLZ , MVT::i64 , Expand);
85 setOperationAction(ISD::BSWAP , MVT::i64, Expand);
86 setOperationAction(ISD::ROTL , MVT::i64, Expand);
87 setOperationAction(ISD::ROTR , MVT::i64, Expand);
89 setOperationAction(ISD::SREM , MVT::i64, Custom);
90 setOperationAction(ISD::UREM , MVT::i64, Custom);
91 setOperationAction(ISD::SDIV , MVT::i64, Custom);
92 setOperationAction(ISD::UDIV , MVT::i64, Custom);
94 setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
95 setOperationAction(ISD::MEMSET , MVT::Other, Expand);
96 setOperationAction(ISD::MEMCPY , MVT::Other, Expand);
98 // We don't support sin/cos/sqrt
99 setOperationAction(ISD::FSIN , MVT::f64, Expand);
100 setOperationAction(ISD::FCOS , MVT::f64, Expand);
101 setOperationAction(ISD::FSIN , MVT::f32, Expand);
102 setOperationAction(ISD::FCOS , MVT::f32, Expand);
104 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
105 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
107 setOperationAction(ISD::SETCC, MVT::f32, Promote);
109 // We don't have line number support yet.
110 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
111 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
112 setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
114 // Not implemented yet.
115 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
116 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
117 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
119 // We want to legalize GlobalAddress and ConstantPool and
120 // ExternalSymbols nodes into the appropriate instructions to
121 // materialize the address.
122 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
123 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
124 setOperationAction(ISD::ExternalSymbol, MVT::i64, Custom);
126 setOperationAction(ISD::VASTART, MVT::Other, Custom);
127 setOperationAction(ISD::VAEND, MVT::Other, Expand);
128 setOperationAction(ISD::VACOPY, MVT::Other, Custom);
129 setOperationAction(ISD::VAARG, MVT::Other, Custom);
130 setOperationAction(ISD::VAARG, MVT::i32, Custom);
132 setOperationAction(ISD::RET, MVT::Other, Custom);
134 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
135 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
137 setStackPointerRegisterToSaveRestore(Alpha::R30);
139 setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
140 setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
141 addLegalFPImmediate(+0.0); //F31
142 addLegalFPImmediate(-0.0); //-F31
145 setJumpBufAlignment(16);
147 computeRegisterProperties();
149 useITOF = TM.getSubtarget<AlphaSubtarget>().hasF2I();
152 const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
155 case AlphaISD::ITOFT_: return "Alpha::ITOFT_";
156 case AlphaISD::FTOIT_: return "Alpha::FTOIT_";
157 case AlphaISD::CVTQT_: return "Alpha::CVTQT_";
158 case AlphaISD::CVTQS_: return "Alpha::CVTQS_";
159 case AlphaISD::CVTTQ_: return "Alpha::CVTTQ_";
160 case AlphaISD::GPRelHi: return "Alpha::GPRelHi";
161 case AlphaISD::GPRelLo: return "Alpha::GPRelLo";
162 case AlphaISD::RelLit: return "Alpha::RelLit";
163 case AlphaISD::GlobalRetAddr: return "Alpha::GlobalRetAddr";
164 case AlphaISD::CALL: return "Alpha::CALL";
165 case AlphaISD::DivCall: return "Alpha::DivCall";
166 case AlphaISD::RET_FLAG: return "Alpha::RET_FLAG";
167 case AlphaISD::COND_BRANCH_I: return "Alpha::COND_BRANCH_I";
168 case AlphaISD::COND_BRANCH_F: return "Alpha::COND_BRANCH_F";
172 static SDOperand LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
173 MVT::ValueType PtrVT = Op.getValueType();
174 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
175 SDOperand JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
176 SDOperand Zero = DAG.getConstant(0, PtrVT);
178 const TargetMachine &TM = DAG.getTarget();
180 SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, JTI,
181 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
182 SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, JTI, Hi);
186 //http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/
187 //AA-PY8AC-TET1_html/callCH3.html#BLOCK21
189 //For now, just use variable size stack frame format
191 //In a standard call, the first six items are passed in registers $16
192 //- $21 and/or registers $f16 - $f21. (See Section 4.1.2 for details
193 //of argument-to-register correspondence.) The remaining items are
194 //collected in a memory argument list that is a naturally aligned
195 //array of quadwords. In a standard call, this list, if present, must
196 //be passed at 0(SP).
197 //7 ... n 0(SP) ... (n-7)*8(SP)
205 static SDOperand LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG,
207 int &VarArgsOffset) {
208 MachineFunction &MF = DAG.getMachineFunction();
209 MachineFrameInfo *MFI = MF.getFrameInfo();
210 SSARegMap *RegMap = MF.getSSARegMap();
211 std::vector<SDOperand> ArgValues;
212 SDOperand Root = Op.getOperand(0);
214 AddLiveIn(MF, Alpha::R29, &Alpha::GPRCRegClass); //GP
215 AddLiveIn(MF, Alpha::R26, &Alpha::GPRCRegClass); //RA
217 unsigned args_int[] = {
218 Alpha::R16, Alpha::R17, Alpha::R18, Alpha::R19, Alpha::R20, Alpha::R21};
219 unsigned args_float[] = {
220 Alpha::F16, Alpha::F17, Alpha::F18, Alpha::F19, Alpha::F20, Alpha::F21};
222 for (unsigned ArgNo = 0, e = Op.Val->getNumValues()-1; ArgNo != e; ++ArgNo) {
224 MVT::ValueType ObjectVT = Op.getValue(ArgNo).getValueType();
231 std::cerr << "Unknown Type " << ObjectVT << "\n";
234 args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
235 &Alpha::F8RCRegClass);
236 ArgVal = DAG.getCopyFromReg(Root, args_float[ArgNo], ObjectVT);
239 args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
240 &Alpha::F4RCRegClass);
241 ArgVal = DAG.getCopyFromReg(Root, args_float[ArgNo], ObjectVT);
244 args_int[ArgNo] = AddLiveIn(MF, args_int[ArgNo],
245 &Alpha::GPRCRegClass);
246 ArgVal = DAG.getCopyFromReg(Root, args_int[ArgNo], MVT::i64);
250 // Create the frame index object for this incoming parameter...
251 int FI = MFI->CreateFixedObject(8, 8 * (ArgNo - 6));
253 // Create the SelectionDAG nodes corresponding to a load
254 //from this parameter
255 SDOperand FIN = DAG.getFrameIndex(FI, MVT::i64);
256 ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
258 ArgValues.push_back(ArgVal);
261 // If the functions takes variable number of arguments, copy all regs to stack
262 bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
264 VarArgsOffset = (Op.Val->getNumValues()-1) * 8;
265 std::vector<SDOperand> LS;
266 for (int i = 0; i < 6; ++i) {
267 if (MRegisterInfo::isPhysicalRegister(args_int[i]))
268 args_int[i] = AddLiveIn(MF, args_int[i], &Alpha::GPRCRegClass);
269 SDOperand argt = DAG.getCopyFromReg(Root, args_int[i], MVT::i64);
270 int FI = MFI->CreateFixedObject(8, -8 * (6 - i));
271 if (i == 0) VarArgsBase = FI;
272 SDOperand SDFI = DAG.getFrameIndex(FI, MVT::i64);
273 LS.push_back(DAG.getStore(Root, argt, SDFI, NULL, 0));
275 if (MRegisterInfo::isPhysicalRegister(args_float[i]))
276 args_float[i] = AddLiveIn(MF, args_float[i], &Alpha::F8RCRegClass);
277 argt = DAG.getCopyFromReg(Root, args_float[i], MVT::f64);
278 FI = MFI->CreateFixedObject(8, - 8 * (12 - i));
279 SDFI = DAG.getFrameIndex(FI, MVT::i64);
280 LS.push_back(DAG.getStore(Root, argt, SDFI, NULL, 0));
283 //Set up a token factor with all the stack traffic
284 Root = DAG.getNode(ISD::TokenFactor, MVT::Other, &LS[0], LS.size());
287 ArgValues.push_back(Root);
289 // Return the new list of results.
290 std::vector<MVT::ValueType> RetVT(Op.Val->value_begin(),
291 Op.Val->value_end());
292 return DAG.getNode(ISD::MERGE_VALUES, RetVT, &ArgValues[0], ArgValues.size());
295 static SDOperand LowerRET(SDOperand Op, SelectionDAG &DAG) {
296 SDOperand Copy = DAG.getCopyToReg(Op.getOperand(0), Alpha::R26,
297 DAG.getNode(AlphaISD::GlobalRetAddr,
300 switch (Op.getNumOperands()) {
302 assert(0 && "Do not know how to return this many arguments!");
306 //return SDOperand(); // ret void is legal
308 MVT::ValueType ArgVT = Op.getOperand(1).getValueType();
310 if (MVT::isInteger(ArgVT))
313 assert(MVT::isFloatingPoint(ArgVT));
316 Copy = DAG.getCopyToReg(Copy, ArgReg, Op.getOperand(1), Copy.getValue(1));
317 if(DAG.getMachineFunction().liveout_empty())
318 DAG.getMachineFunction().addLiveOut(ArgReg);
322 return DAG.getNode(AlphaISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
325 std::pair<SDOperand, SDOperand>
326 AlphaTargetLowering::LowerCallTo(SDOperand Chain,
327 const Type *RetTy, bool isVarArg,
328 unsigned CallingConv, bool isTailCall,
329 SDOperand Callee, ArgListTy &Args,
333 NumBytes = (Args.size() - 6) * 8;
335 Chain = DAG.getCALLSEQ_START(Chain,
336 DAG.getConstant(NumBytes, getPointerTy()));
337 std::vector<SDOperand> args_to_use;
338 for (unsigned i = 0, e = Args.size(); i != e; ++i)
340 switch (getValueType(Args[i].second)) {
341 default: assert(0 && "Unexpected ValueType for argument!");
346 // Promote the integer to 64 bits. If the input type is signed use a
347 // sign extend, otherwise use a zero extend.
348 if (Args[i].second->isSigned())
349 Args[i].first = DAG.getNode(ISD::SIGN_EXTEND, MVT::i64, Args[i].first);
351 Args[i].first = DAG.getNode(ISD::ZERO_EXTEND, MVT::i64, Args[i].first);
358 args_to_use.push_back(Args[i].first);
361 std::vector<MVT::ValueType> RetVals;
362 MVT::ValueType RetTyVT = getValueType(RetTy);
363 MVT::ValueType ActualRetTyVT = RetTyVT;
364 if (RetTyVT >= MVT::i1 && RetTyVT <= MVT::i32)
365 ActualRetTyVT = MVT::i64;
367 if (RetTyVT != MVT::isVoid)
368 RetVals.push_back(ActualRetTyVT);
369 RetVals.push_back(MVT::Other);
371 std::vector<SDOperand> Ops;
372 Ops.push_back(Chain);
373 Ops.push_back(Callee);
374 Ops.insert(Ops.end(), args_to_use.begin(), args_to_use.end());
375 SDOperand TheCall = DAG.getNode(AlphaISD::CALL, RetVals, &Ops[0], Ops.size());
376 Chain = TheCall.getValue(RetTyVT != MVT::isVoid);
377 Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
378 DAG.getConstant(NumBytes, getPointerTy()));
379 SDOperand RetVal = TheCall;
381 if (RetTyVT != ActualRetTyVT) {
382 RetVal = DAG.getNode(RetTy->isSigned() ? ISD::AssertSext : ISD::AssertZext,
383 MVT::i64, RetVal, DAG.getValueType(RetTyVT));
384 RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
387 return std::make_pair(RetVal, Chain);
396 /// LowerOperation - Provide custom lowering hooks for some operations.
398 SDOperand AlphaTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
399 switch (Op.getOpcode()) {
400 default: assert(0 && "Wasn't expecting to be able to lower this!");
401 case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG,
405 case ISD::RET: return LowerRET(Op,DAG);
406 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
408 case ISD::SINT_TO_FP: {
409 assert(MVT::i64 == Op.getOperand(0).getValueType() &&
410 "Unhandled SINT_TO_FP type in custom expander!");
412 bool isDouble = MVT::f64 == Op.getValueType();
414 LD = DAG.getNode(AlphaISD::ITOFT_, MVT::f64, Op.getOperand(0));
417 DAG.getMachineFunction().getFrameInfo()->CreateStackObject(8, 8);
418 SDOperand FI = DAG.getFrameIndex(FrameIdx, MVT::i64);
419 SDOperand ST = DAG.getStore(DAG.getEntryNode(),
420 Op.getOperand(0), FI, NULL, 0);
421 LD = DAG.getLoad(MVT::f64, ST, FI, NULL, 0);
423 SDOperand FP = DAG.getNode(isDouble?AlphaISD::CVTQT_:AlphaISD::CVTQS_,
424 isDouble?MVT::f64:MVT::f32, LD);
427 case ISD::FP_TO_SINT: {
428 bool isDouble = MVT::f64 == Op.getOperand(0).getValueType();
429 SDOperand src = Op.getOperand(0);
431 if (!isDouble) //Promote
432 src = DAG.getNode(ISD::FP_EXTEND, MVT::f64, src);
434 src = DAG.getNode(AlphaISD::CVTTQ_, MVT::f64, src);
437 return DAG.getNode(AlphaISD::FTOIT_, MVT::i64, src);
440 DAG.getMachineFunction().getFrameInfo()->CreateStackObject(8, 8);
441 SDOperand FI = DAG.getFrameIndex(FrameIdx, MVT::i64);
442 SDOperand ST = DAG.getStore(DAG.getEntryNode(), src, FI, NULL, 0);
443 return DAG.getLoad(MVT::i64, ST, FI, NULL, 0);
446 case ISD::ConstantPool: {
447 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
448 Constant *C = CP->getConstVal();
449 SDOperand CPI = DAG.getTargetConstantPool(C, MVT::i64, CP->getAlignment());
451 SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, CPI,
452 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
453 SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, CPI, Hi);
456 case ISD::GlobalAddress: {
457 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
458 GlobalValue *GV = GSDN->getGlobal();
459 SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i64, GSDN->getOffset());
461 // if (!GV->hasWeakLinkage() && !GV->isExternal() && !GV->hasLinkOnceLinkage()) {
462 if (GV->hasInternalLinkage()) {
463 SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, GA,
464 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
465 SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, GA, Hi);
468 return DAG.getNode(AlphaISD::RelLit, MVT::i64, GA,
469 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
471 case ISD::ExternalSymbol: {
472 return DAG.getNode(AlphaISD::RelLit, MVT::i64,
473 DAG.getTargetExternalSymbol(cast<ExternalSymbolSDNode>(Op)
474 ->getSymbol(), MVT::i64),
475 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
480 //Expand only on constant case
481 if (Op.getOperand(1).getOpcode() == ISD::Constant) {
482 MVT::ValueType VT = Op.Val->getValueType(0);
483 unsigned Opc = Op.Val->getOpcode() == ISD::UREM ? ISD::UDIV : ISD::SDIV;
484 SDOperand Tmp1 = Op.Val->getOpcode() == ISD::UREM ?
485 BuildUDIV(Op.Val, DAG, NULL) :
486 BuildSDIV(Op.Val, DAG, NULL);
487 Tmp1 = DAG.getNode(ISD::MUL, VT, Tmp1, Op.getOperand(1));
488 Tmp1 = DAG.getNode(ISD::SUB, VT, Op.getOperand(0), Tmp1);
494 if (MVT::isInteger(Op.getValueType())) {
495 if (Op.getOperand(1).getOpcode() == ISD::Constant)
496 return Op.getOpcode() == ISD::SDIV ? BuildSDIV(Op.Val, DAG, NULL)
497 : BuildUDIV(Op.Val, DAG, NULL);
498 const char* opstr = 0;
499 switch(Op.getOpcode()) {
500 case ISD::UREM: opstr = "__remqu"; break;
501 case ISD::SREM: opstr = "__remq"; break;
502 case ISD::UDIV: opstr = "__divqu"; break;
503 case ISD::SDIV: opstr = "__divq"; break;
505 SDOperand Tmp1 = Op.getOperand(0),
506 Tmp2 = Op.getOperand(1),
507 Addr = DAG.getExternalSymbol(opstr, MVT::i64);
508 return DAG.getNode(AlphaISD::DivCall, MVT::i64, Addr, Tmp1, Tmp2);
513 SDOperand Chain = Op.getOperand(0);
514 SDOperand VAListP = Op.getOperand(1);
515 SrcValueSDNode *VAListS = cast<SrcValueSDNode>(Op.getOperand(2));
517 SDOperand Base = DAG.getLoad(MVT::i64, Chain, VAListP, VAListS->getValue(),
518 VAListS->getOffset());
519 SDOperand Tmp = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
520 DAG.getConstant(8, MVT::i64));
521 SDOperand Offset = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Base.getValue(1),
522 Tmp, NULL, 0, MVT::i32);
523 SDOperand DataPtr = DAG.getNode(ISD::ADD, MVT::i64, Base, Offset);
524 if (MVT::isFloatingPoint(Op.getValueType()))
526 //if fp && Offset < 6*8, then subtract 6*8 from DataPtr
527 SDOperand FPDataPtr = DAG.getNode(ISD::SUB, MVT::i64, DataPtr,
528 DAG.getConstant(8*6, MVT::i64));
529 SDOperand CC = DAG.getSetCC(MVT::i64, Offset,
530 DAG.getConstant(8*6, MVT::i64), ISD::SETLT);
531 DataPtr = DAG.getNode(ISD::SELECT, MVT::i64, CC, FPDataPtr, DataPtr);
534 SDOperand NewOffset = DAG.getNode(ISD::ADD, MVT::i64, Offset,
535 DAG.getConstant(8, MVT::i64));
536 SDOperand Update = DAG.getTruncStore(Offset.getValue(1), NewOffset,
537 Tmp, NULL, 0, MVT::i32);
540 if (Op.getValueType() == MVT::i32)
541 Result = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Update, DataPtr,
544 Result = DAG.getLoad(Op.getValueType(), Update, DataPtr, NULL, 0);
548 SDOperand Chain = Op.getOperand(0);
549 SDOperand DestP = Op.getOperand(1);
550 SDOperand SrcP = Op.getOperand(2);
551 SrcValueSDNode *DestS = cast<SrcValueSDNode>(Op.getOperand(3));
552 SrcValueSDNode *SrcS = cast<SrcValueSDNode>(Op.getOperand(4));
554 SDOperand Val = DAG.getLoad(getPointerTy(), Chain, SrcP,
555 SrcS->getValue(), SrcS->getOffset());
556 SDOperand Result = DAG.getStore(Val.getValue(1), Val, DestP, DestS->getValue(),
558 SDOperand NP = DAG.getNode(ISD::ADD, MVT::i64, SrcP,
559 DAG.getConstant(8, MVT::i64));
560 Val = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Result, NP, NULL,0, MVT::i32);
561 SDOperand NPD = DAG.getNode(ISD::ADD, MVT::i64, DestP,
562 DAG.getConstant(8, MVT::i64));
563 return DAG.getTruncStore(Val.getValue(1), Val, NPD, NULL, 0, MVT::i32);
566 SDOperand Chain = Op.getOperand(0);
567 SDOperand VAListP = Op.getOperand(1);
568 SrcValueSDNode *VAListS = cast<SrcValueSDNode>(Op.getOperand(3));
570 // vastart stores the address of the VarArgsBase and VarArgsOffset
571 SDOperand FR = DAG.getFrameIndex(VarArgsBase, MVT::i64);
572 SDOperand S1 = DAG.getStore(Chain, FR, VAListP, VAListS->getValue(),
573 VAListS->getOffset());
574 SDOperand SA2 = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
575 DAG.getConstant(8, MVT::i64));
576 return DAG.getTruncStore(S1, DAG.getConstant(VarArgsOffset, MVT::i64),
577 SA2, NULL, 0, MVT::i32);
584 SDOperand AlphaTargetLowering::CustomPromoteOperation(SDOperand Op,
586 assert(Op.getValueType() == MVT::i32 &&
587 Op.getOpcode() == ISD::VAARG &&
588 "Unknown node to custom promote!");
590 // The code in LowerOperation already handles i32 vaarg
591 return LowerOperation(Op, DAG);
597 /// getConstraintType - Given a constraint letter, return the type of
598 /// constraint it is for this target.
599 AlphaTargetLowering::ConstraintType
600 AlphaTargetLowering::getConstraintType(char ConstraintLetter) const {
601 switch (ConstraintLetter) {
605 return C_RegisterClass;
607 return TargetLowering::getConstraintType(ConstraintLetter);
610 std::vector<unsigned> AlphaTargetLowering::
611 getRegClassForInlineAsmConstraint(const std::string &Constraint,
612 MVT::ValueType VT) const {
613 if (Constraint.size() == 1) {
614 switch (Constraint[0]) {
615 default: break; // Unknown constriant letter
617 return make_vector<unsigned>(Alpha::F0 , Alpha::F1 , Alpha::F2 ,
618 Alpha::F3 , Alpha::F4 , Alpha::F5 ,
619 Alpha::F6 , Alpha::F7 , Alpha::F8 ,
620 Alpha::F9 , Alpha::F10, Alpha::F11,
621 Alpha::F12, Alpha::F13, Alpha::F14,
622 Alpha::F15, Alpha::F16, Alpha::F17,
623 Alpha::F18, Alpha::F19, Alpha::F20,
624 Alpha::F21, Alpha::F22, Alpha::F23,
625 Alpha::F24, Alpha::F25, Alpha::F26,
626 Alpha::F27, Alpha::F28, Alpha::F29,
627 Alpha::F30, Alpha::F31, 0);
629 return make_vector<unsigned>(Alpha::R0 , Alpha::R1 , Alpha::R2 ,
630 Alpha::R3 , Alpha::R4 , Alpha::R5 ,
631 Alpha::R6 , Alpha::R7 , Alpha::R8 ,
632 Alpha::R9 , Alpha::R10, Alpha::R11,
633 Alpha::R12, Alpha::R13, Alpha::R14,
634 Alpha::R15, Alpha::R16, Alpha::R17,
635 Alpha::R18, Alpha::R19, Alpha::R20,
636 Alpha::R21, Alpha::R22, Alpha::R23,
637 Alpha::R24, Alpha::R25, Alpha::R26,
638 Alpha::R27, Alpha::R28, Alpha::R29,
639 Alpha::R30, Alpha::R31, 0);
644 return std::vector<unsigned>();