1 //===-- AlphaISelLowering.cpp - Alpha DAG Lowering Implementation ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // 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/MachineRegisterInfo.h"
20 #include "llvm/CodeGen/SelectionDAG.h"
21 #include "llvm/CodeGen/MachineRegisterInfo.h"
22 #include "llvm/Constants.h"
23 #include "llvm/Function.h"
24 #include "llvm/Module.h"
25 #include "llvm/Support/CommandLine.h"
28 /// AddLiveIn - This helper function adds the specified physical register to the
29 /// MachineFunction as a live in value. It also creates a corresponding virtual
31 static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
32 TargetRegisterClass *RC) {
33 assert(RC->contains(PReg) && "Not the correct regclass!");
34 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
35 MF.getRegInfo().addLiveIn(PReg, VReg);
39 AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM) : TargetLowering(TM) {
40 // Set up the TargetLowering object.
41 //I am having problems with shr n ubyte 1
42 setShiftAmountType(MVT::i64);
43 setSetCCResultContents(ZeroOrOneSetCCResult);
45 setUsesGlobalOffsetTable(true);
47 addRegisterClass(MVT::i64, Alpha::GPRCRegisterClass);
48 addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
49 addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
51 setLoadXAction(ISD::EXTLOAD, MVT::i1, Promote);
52 setLoadXAction(ISD::EXTLOAD, MVT::f32, Expand);
54 setLoadXAction(ISD::ZEXTLOAD, MVT::i1, Promote);
55 setLoadXAction(ISD::ZEXTLOAD, MVT::i32, Expand);
57 setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
58 setLoadXAction(ISD::SEXTLOAD, MVT::i8, Expand);
59 setLoadXAction(ISD::SEXTLOAD, MVT::i16, Expand);
61 // setOperationAction(ISD::BRIND, MVT::Other, Expand);
62 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
63 setOperationAction(ISD::BR_CC, MVT::Other, Expand);
64 setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
66 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
68 setOperationAction(ISD::FREM, MVT::f32, Expand);
69 setOperationAction(ISD::FREM, MVT::f64, Expand);
71 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
72 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
73 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
74 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
76 if (!TM.getSubtarget<AlphaSubtarget>().hasCT()) {
77 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
78 setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
79 setOperationAction(ISD::CTLZ , MVT::i64 , Expand);
81 setOperationAction(ISD::BSWAP , MVT::i64, Expand);
82 setOperationAction(ISD::ROTL , MVT::i64, Expand);
83 setOperationAction(ISD::ROTR , MVT::i64, Expand);
85 setOperationAction(ISD::SREM , MVT::i64, Custom);
86 setOperationAction(ISD::UREM , MVT::i64, Custom);
87 setOperationAction(ISD::SDIV , MVT::i64, Custom);
88 setOperationAction(ISD::UDIV , MVT::i64, Custom);
90 setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
91 setOperationAction(ISD::MEMSET , MVT::Other, Expand);
92 setOperationAction(ISD::MEMCPY , MVT::Other, Expand);
94 // We don't support sin/cos/sqrt/pow
95 setOperationAction(ISD::FSIN , MVT::f64, Expand);
96 setOperationAction(ISD::FCOS , MVT::f64, Expand);
97 setOperationAction(ISD::FSIN , MVT::f32, Expand);
98 setOperationAction(ISD::FCOS , MVT::f32, Expand);
100 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
101 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
103 setOperationAction(ISD::FPOW , MVT::f32, Expand);
104 setOperationAction(ISD::FPOW , MVT::f64, Expand);
106 setOperationAction(ISD::SETCC, MVT::f32, Promote);
108 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Promote);
110 // We don't have line number support yet.
111 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
112 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
113 setOperationAction(ISD::LABEL, MVT::Other, Expand);
115 // Not implemented yet.
116 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
117 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
118 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
119 setOperationAction(ISD::PREFETCH, MVT::Other, Expand);
121 // We want to legalize GlobalAddress and ConstantPool and
122 // ExternalSymbols nodes into the appropriate instructions to
123 // materialize the address.
124 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
125 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
126 setOperationAction(ISD::ExternalSymbol, MVT::i64, Custom);
127 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
129 setOperationAction(ISD::VASTART, MVT::Other, Custom);
130 setOperationAction(ISD::VAEND, MVT::Other, Expand);
131 setOperationAction(ISD::VACOPY, MVT::Other, Custom);
132 setOperationAction(ISD::VAARG, MVT::Other, Custom);
133 setOperationAction(ISD::VAARG, MVT::i32, Custom);
135 setOperationAction(ISD::RET, MVT::Other, Custom);
137 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
138 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
140 setStackPointerRegisterToSaveRestore(Alpha::R30);
142 addLegalFPImmediate(APFloat(+0.0)); //F31
143 addLegalFPImmediate(APFloat(+0.0f)); //F31
144 addLegalFPImmediate(APFloat(-0.0)); //-F31
145 addLegalFPImmediate(APFloat(-0.0f)); //-F31
148 setJumpBufAlignment(16);
150 computeRegisterProperties();
154 AlphaTargetLowering::getSetCCResultType(const SDOperand &) const {
158 const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
161 case AlphaISD::CVTQT_: return "Alpha::CVTQT_";
162 case AlphaISD::CVTQS_: return "Alpha::CVTQS_";
163 case AlphaISD::CVTTQ_: return "Alpha::CVTTQ_";
164 case AlphaISD::GPRelHi: return "Alpha::GPRelHi";
165 case AlphaISD::GPRelLo: return "Alpha::GPRelLo";
166 case AlphaISD::RelLit: return "Alpha::RelLit";
167 case AlphaISD::GlobalRetAddr: return "Alpha::GlobalRetAddr";
168 case AlphaISD::CALL: return "Alpha::CALL";
169 case AlphaISD::DivCall: return "Alpha::DivCall";
170 case AlphaISD::RET_FLAG: return "Alpha::RET_FLAG";
171 case AlphaISD::COND_BRANCH_I: return "Alpha::COND_BRANCH_I";
172 case AlphaISD::COND_BRANCH_F: return "Alpha::COND_BRANCH_F";
176 static SDOperand LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
177 MVT::ValueType PtrVT = Op.getValueType();
178 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
179 SDOperand JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
180 SDOperand Zero = DAG.getConstant(0, PtrVT);
182 SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, JTI,
183 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
184 SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, JTI, Hi);
188 //http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/
189 //AA-PY8AC-TET1_html/callCH3.html#BLOCK21
191 //For now, just use variable size stack frame format
193 //In a standard call, the first six items are passed in registers $16
194 //- $21 and/or registers $f16 - $f21. (See Section 4.1.2 for details
195 //of argument-to-register correspondence.) The remaining items are
196 //collected in a memory argument list that is a naturally aligned
197 //array of quadwords. In a standard call, this list, if present, must
198 //be passed at 0(SP).
199 //7 ... n 0(SP) ... (n-7)*8(SP)
207 static SDOperand LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG,
209 int &VarArgsOffset) {
210 MachineFunction &MF = DAG.getMachineFunction();
211 MachineFrameInfo *MFI = MF.getFrameInfo();
212 std::vector<SDOperand> ArgValues;
213 SDOperand Root = Op.getOperand(0);
215 AddLiveIn(MF, Alpha::R29, &Alpha::GPRCRegClass); //GP
216 AddLiveIn(MF, Alpha::R26, &Alpha::GPRCRegClass); //RA
218 unsigned args_int[] = {
219 Alpha::R16, Alpha::R17, Alpha::R18, Alpha::R19, Alpha::R20, Alpha::R21};
220 unsigned args_float[] = {
221 Alpha::F16, Alpha::F17, Alpha::F18, Alpha::F19, Alpha::F20, Alpha::F21};
223 for (unsigned ArgNo = 0, e = Op.Val->getNumValues()-1; ArgNo != e; ++ArgNo) {
225 MVT::ValueType ObjectVT = Op.getValue(ArgNo).getValueType();
231 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 (TargetRegisterInfo::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 (TargetRegisterInfo::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().getRegInfo().liveout_empty())
318 DAG.getMachineFunction().getRegInfo().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, const Type *RetTy,
327 bool RetSExt, bool RetZExt, 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].Ty)) {
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.
349 Args[i].Node = DAG.getNode(ISD::SIGN_EXTEND, MVT::i64, Args[i].Node);
350 else if (Args[i].isZExt)
351 Args[i].Node = DAG.getNode(ISD::ZERO_EXTEND, MVT::i64, Args[i].Node);
353 Args[i].Node = DAG.getNode(ISD::ANY_EXTEND, MVT::i64, Args[i].Node);
360 args_to_use.push_back(Args[i].Node);
363 std::vector<MVT::ValueType> RetVals;
364 MVT::ValueType RetTyVT = getValueType(RetTy);
365 MVT::ValueType ActualRetTyVT = RetTyVT;
366 if (RetTyVT >= MVT::i1 && RetTyVT <= MVT::i32)
367 ActualRetTyVT = MVT::i64;
369 if (RetTyVT != MVT::isVoid)
370 RetVals.push_back(ActualRetTyVT);
371 RetVals.push_back(MVT::Other);
373 std::vector<SDOperand> Ops;
374 Ops.push_back(Chain);
375 Ops.push_back(Callee);
376 Ops.insert(Ops.end(), args_to_use.begin(), args_to_use.end());
377 SDOperand TheCall = DAG.getNode(AlphaISD::CALL, RetVals, &Ops[0], Ops.size());
378 Chain = TheCall.getValue(RetTyVT != MVT::isVoid);
379 Chain = DAG.getCALLSEQ_END(Chain,
380 DAG.getConstant(NumBytes, getPointerTy()),
381 DAG.getConstant(0, getPointerTy()),
383 SDOperand RetVal = TheCall;
385 if (RetTyVT != ActualRetTyVT) {
386 ISD::NodeType AssertKind = ISD::DELETED_NODE;
388 AssertKind = ISD::AssertSext;
390 AssertKind = ISD::AssertZext;
392 if (AssertKind != ISD::DELETED_NODE)
393 RetVal = DAG.getNode(AssertKind, MVT::i64, RetVal,
394 DAG.getValueType(RetTyVT));
396 RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
399 return std::make_pair(RetVal, Chain);
402 /// LowerOperation - Provide custom lowering hooks for some operations.
404 SDOperand AlphaTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
405 switch (Op.getOpcode()) {
406 default: assert(0 && "Wasn't expecting to be able to lower this!");
407 case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG,
411 case ISD::RET: return LowerRET(Op,DAG);
412 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
414 case ISD::SINT_TO_FP: {
415 assert(MVT::i64 == Op.getOperand(0).getValueType() &&
416 "Unhandled SINT_TO_FP type in custom expander!");
418 bool isDouble = MVT::f64 == Op.getValueType();
419 LD = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, Op.getOperand(0));
420 SDOperand FP = DAG.getNode(isDouble?AlphaISD::CVTQT_:AlphaISD::CVTQS_,
421 isDouble?MVT::f64:MVT::f32, LD);
424 case ISD::FP_TO_SINT: {
425 bool isDouble = MVT::f64 == Op.getOperand(0).getValueType();
426 SDOperand src = Op.getOperand(0);
428 if (!isDouble) //Promote
429 src = DAG.getNode(ISD::FP_EXTEND, MVT::f64, src);
431 src = DAG.getNode(AlphaISD::CVTTQ_, MVT::f64, src);
433 return DAG.getNode(ISD::BIT_CONVERT, MVT::i64, src);
435 case ISD::ConstantPool: {
436 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
437 Constant *C = CP->getConstVal();
438 SDOperand CPI = DAG.getTargetConstantPool(C, MVT::i64, CP->getAlignment());
440 SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, CPI,
441 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
442 SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, CPI, Hi);
445 case ISD::GlobalTLSAddress:
446 assert(0 && "TLS not implemented for Alpha.");
447 case ISD::GlobalAddress: {
448 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
449 GlobalValue *GV = GSDN->getGlobal();
450 SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i64, GSDN->getOffset());
452 // if (!GV->hasWeakLinkage() && !GV->isDeclaration() && !GV->hasLinkOnceLinkage()) {
453 if (GV->hasInternalLinkage()) {
454 SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, GA,
455 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
456 SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, GA, Hi);
459 return DAG.getNode(AlphaISD::RelLit, MVT::i64, GA,
460 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
462 case ISD::ExternalSymbol: {
463 return DAG.getNode(AlphaISD::RelLit, MVT::i64,
464 DAG.getTargetExternalSymbol(cast<ExternalSymbolSDNode>(Op)
465 ->getSymbol(), MVT::i64),
466 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
471 //Expand only on constant case
472 if (Op.getOperand(1).getOpcode() == ISD::Constant) {
473 MVT::ValueType VT = Op.Val->getValueType(0);
474 SDOperand Tmp1 = Op.Val->getOpcode() == ISD::UREM ?
475 BuildUDIV(Op.Val, DAG, NULL) :
476 BuildSDIV(Op.Val, DAG, NULL);
477 Tmp1 = DAG.getNode(ISD::MUL, VT, Tmp1, Op.getOperand(1));
478 Tmp1 = DAG.getNode(ISD::SUB, VT, Op.getOperand(0), Tmp1);
484 if (MVT::isInteger(Op.getValueType())) {
485 if (Op.getOperand(1).getOpcode() == ISD::Constant)
486 return Op.getOpcode() == ISD::SDIV ? BuildSDIV(Op.Val, DAG, NULL)
487 : BuildUDIV(Op.Val, DAG, NULL);
488 const char* opstr = 0;
489 switch (Op.getOpcode()) {
490 case ISD::UREM: opstr = "__remqu"; break;
491 case ISD::SREM: opstr = "__remq"; break;
492 case ISD::UDIV: opstr = "__divqu"; break;
493 case ISD::SDIV: opstr = "__divq"; break;
495 SDOperand Tmp1 = Op.getOperand(0),
496 Tmp2 = Op.getOperand(1),
497 Addr = DAG.getExternalSymbol(opstr, MVT::i64);
498 return DAG.getNode(AlphaISD::DivCall, MVT::i64, Addr, Tmp1, Tmp2);
503 SDOperand Chain = Op.getOperand(0);
504 SDOperand VAListP = Op.getOperand(1);
505 const Value *VAListS = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
507 SDOperand Base = DAG.getLoad(MVT::i64, Chain, VAListP, VAListS, 0);
508 SDOperand Tmp = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
509 DAG.getConstant(8, MVT::i64));
510 SDOperand Offset = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Base.getValue(1),
511 Tmp, NULL, 0, MVT::i32);
512 SDOperand DataPtr = DAG.getNode(ISD::ADD, MVT::i64, Base, Offset);
513 if (MVT::isFloatingPoint(Op.getValueType()))
515 //if fp && Offset < 6*8, then subtract 6*8 from DataPtr
516 SDOperand FPDataPtr = DAG.getNode(ISD::SUB, MVT::i64, DataPtr,
517 DAG.getConstant(8*6, MVT::i64));
518 SDOperand CC = DAG.getSetCC(MVT::i64, Offset,
519 DAG.getConstant(8*6, MVT::i64), ISD::SETLT);
520 DataPtr = DAG.getNode(ISD::SELECT, MVT::i64, CC, FPDataPtr, DataPtr);
523 SDOperand NewOffset = DAG.getNode(ISD::ADD, MVT::i64, Offset,
524 DAG.getConstant(8, MVT::i64));
525 SDOperand Update = DAG.getTruncStore(Offset.getValue(1), NewOffset,
526 Tmp, NULL, 0, MVT::i32);
529 if (Op.getValueType() == MVT::i32)
530 Result = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Update, DataPtr,
533 Result = DAG.getLoad(Op.getValueType(), Update, DataPtr, NULL, 0);
537 SDOperand Chain = Op.getOperand(0);
538 SDOperand DestP = Op.getOperand(1);
539 SDOperand SrcP = Op.getOperand(2);
540 const Value *DestS = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
541 const Value *SrcS = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
543 SDOperand Val = DAG.getLoad(getPointerTy(), Chain, SrcP, SrcS, 0);
544 SDOperand Result = DAG.getStore(Val.getValue(1), Val, DestP, DestS, 0);
545 SDOperand NP = DAG.getNode(ISD::ADD, MVT::i64, SrcP,
546 DAG.getConstant(8, MVT::i64));
547 Val = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Result, NP, NULL,0, MVT::i32);
548 SDOperand NPD = DAG.getNode(ISD::ADD, MVT::i64, DestP,
549 DAG.getConstant(8, MVT::i64));
550 return DAG.getTruncStore(Val.getValue(1), Val, NPD, NULL, 0, MVT::i32);
553 SDOperand Chain = Op.getOperand(0);
554 SDOperand VAListP = Op.getOperand(1);
555 const Value *VAListS = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
557 // vastart stores the address of the VarArgsBase and VarArgsOffset
558 SDOperand FR = DAG.getFrameIndex(VarArgsBase, MVT::i64);
559 SDOperand S1 = DAG.getStore(Chain, FR, VAListP, VAListS, 0);
560 SDOperand SA2 = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
561 DAG.getConstant(8, MVT::i64));
562 return DAG.getTruncStore(S1, DAG.getConstant(VarArgsOffset, MVT::i64),
563 SA2, NULL, 0, MVT::i32);
565 case ISD::RETURNADDR:
566 return DAG.getNode(AlphaISD::GlobalRetAddr, MVT::i64);
568 case ISD::FRAMEADDR: break;
574 SDOperand AlphaTargetLowering::CustomPromoteOperation(SDOperand Op,
576 assert(Op.getValueType() == MVT::i32 &&
577 Op.getOpcode() == ISD::VAARG &&
578 "Unknown node to custom promote!");
580 // The code in LowerOperation already handles i32 vaarg
581 return LowerOperation(Op, DAG);
587 /// getConstraintType - Given a constraint letter, return the type of
588 /// constraint it is for this target.
589 AlphaTargetLowering::ConstraintType
590 AlphaTargetLowering::getConstraintType(const std::string &Constraint) const {
591 if (Constraint.size() == 1) {
592 switch (Constraint[0]) {
596 return C_RegisterClass;
599 return TargetLowering::getConstraintType(Constraint);
602 std::vector<unsigned> AlphaTargetLowering::
603 getRegClassForInlineAsmConstraint(const std::string &Constraint,
604 MVT::ValueType VT) const {
605 if (Constraint.size() == 1) {
606 switch (Constraint[0]) {
607 default: break; // Unknown constriant letter
609 return make_vector<unsigned>(Alpha::F0 , Alpha::F1 , Alpha::F2 ,
610 Alpha::F3 , Alpha::F4 , Alpha::F5 ,
611 Alpha::F6 , Alpha::F7 , Alpha::F8 ,
612 Alpha::F9 , Alpha::F10, Alpha::F11,
613 Alpha::F12, Alpha::F13, Alpha::F14,
614 Alpha::F15, Alpha::F16, Alpha::F17,
615 Alpha::F18, Alpha::F19, Alpha::F20,
616 Alpha::F21, Alpha::F22, Alpha::F23,
617 Alpha::F24, Alpha::F25, Alpha::F26,
618 Alpha::F27, Alpha::F28, Alpha::F29,
619 Alpha::F30, Alpha::F31, 0);
621 return make_vector<unsigned>(Alpha::R0 , Alpha::R1 , Alpha::R2 ,
622 Alpha::R3 , Alpha::R4 , Alpha::R5 ,
623 Alpha::R6 , Alpha::R7 , Alpha::R8 ,
624 Alpha::R9 , Alpha::R10, Alpha::R11,
625 Alpha::R12, Alpha::R13, Alpha::R14,
626 Alpha::R15, Alpha::R16, Alpha::R17,
627 Alpha::R18, Alpha::R19, Alpha::R20,
628 Alpha::R21, Alpha::R22, Alpha::R23,
629 Alpha::R24, Alpha::R25, Alpha::R26,
630 Alpha::R27, Alpha::R28, Alpha::R29,
631 Alpha::R30, Alpha::R31, 0);
635 return std::vector<unsigned>();
637 //===----------------------------------------------------------------------===//
638 // Other Lowering Code
639 //===----------------------------------------------------------------------===//
642 AlphaTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
643 MachineBasicBlock *BB) {
644 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
645 assert((MI->getOpcode() == Alpha::CAS32 ||
646 MI->getOpcode() == Alpha::CAS64 ||
647 MI->getOpcode() == Alpha::LAS32 ||
648 MI->getOpcode() == Alpha::LAS64 ||
649 MI->getOpcode() == Alpha::SWAP32 ||
650 MI->getOpcode() == Alpha::SWAP64) &&
651 "Unexpected instr type to insert");
653 bool is32 = MI->getOpcode() == Alpha::CAS32 ||
654 MI->getOpcode() == Alpha::LAS32 ||
655 MI->getOpcode() == Alpha::SWAP32;
657 //Load locked store conditional for atomic ops take on the same form
660 //do stuff (maybe branch to exit)
662 //test sc and maybe branck to start
664 const BasicBlock *LLVM_BB = BB->getBasicBlock();
665 ilist<MachineBasicBlock>::iterator It = BB;
668 MachineBasicBlock *thisMBB = BB;
669 MachineBasicBlock *llscMBB = new MachineBasicBlock(LLVM_BB);
670 MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
672 for(MachineBasicBlock::succ_iterator i = thisMBB->succ_begin(),
673 e = thisMBB->succ_end(); i != e; ++i)
674 sinkMBB->addSuccessor(*i);
675 while(!thisMBB->succ_empty())
676 thisMBB->removeSuccessor(thisMBB->succ_begin());
678 MachineFunction *F = BB->getParent();
679 F->getBasicBlockList().insert(It, llscMBB);
680 F->getBasicBlockList().insert(It, sinkMBB);
682 BuildMI(thisMBB, TII->get(Alpha::BR)).addMBB(llscMBB);
684 unsigned reg_res = MI->getOperand(0).getReg(),
685 reg_ptr = MI->getOperand(1).getReg(),
686 reg_v2 = MI->getOperand(2).getReg(),
687 reg_store = F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
689 BuildMI(llscMBB, TII->get(is32 ? Alpha::LDL_L : Alpha::LDQ_L),
690 reg_res).addImm(0).addReg(reg_ptr);
691 switch (MI->getOpcode()) {
695 = F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
696 BuildMI(llscMBB, TII->get(Alpha::CMPEQ), reg_cmp)
697 .addReg(reg_v2).addReg(reg_res);
698 BuildMI(llscMBB, TII->get(Alpha::BEQ))
699 .addImm(0).addReg(reg_cmp).addMBB(sinkMBB);
700 BuildMI(llscMBB, TII->get(Alpha::BISr), reg_store)
701 .addReg(Alpha::R31).addReg(MI->getOperand(3).getReg());
706 BuildMI(llscMBB, TII->get(is32 ? Alpha::ADDLr : Alpha::ADDQr), reg_store)
707 .addReg(reg_res).addReg(reg_v2);
711 case Alpha::SWAP64: {
712 BuildMI(llscMBB, TII->get(Alpha::BISr), reg_store)
713 .addReg(reg_v2).addReg(reg_v2);
717 BuildMI(llscMBB, TII->get(is32 ? Alpha::STL_C : Alpha::STQ_C), reg_store)
718 .addReg(reg_store).addImm(0).addReg(reg_ptr);
719 BuildMI(llscMBB, TII->get(Alpha::BEQ))
720 .addImm(0).addReg(reg_store).addMBB(llscMBB);
721 BuildMI(llscMBB, TII->get(Alpha::BR)).addMBB(sinkMBB);
723 thisMBB->addSuccessor(llscMBB);
724 llscMBB->addSuccessor(llscMBB);
725 llscMBB->addSuccessor(sinkMBB);
726 delete MI; // The pseudo instruction is gone now.