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/Intrinsics.h"
26 #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.getRegInfo().createVirtualRegister(RC);
36 MF.getRegInfo().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 setBooleanContents(ZeroOrOneBooleanContent);
46 setUsesGlobalOffsetTable(true);
48 addRegisterClass(MVT::i64, Alpha::GPRCRegisterClass);
49 addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
50 addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
52 // We want to custom lower some of our intrinsics.
53 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
55 setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
56 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
58 setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
59 setLoadExtAction(ISD::ZEXTLOAD, MVT::i32, Expand);
61 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
62 setLoadExtAction(ISD::SEXTLOAD, MVT::i8, Expand);
63 setLoadExtAction(ISD::SEXTLOAD, MVT::i16, Expand);
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::ADDC , MVT::i64, Expand);
95 setOperationAction(ISD::ADDE , MVT::i64, Expand);
96 setOperationAction(ISD::SUBC , MVT::i64, Expand);
97 setOperationAction(ISD::SUBE , MVT::i64, Expand);
99 setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
100 setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
103 // We don't support sin/cos/sqrt/pow
104 setOperationAction(ISD::FSIN , MVT::f64, Expand);
105 setOperationAction(ISD::FCOS , MVT::f64, Expand);
106 setOperationAction(ISD::FSIN , MVT::f32, Expand);
107 setOperationAction(ISD::FCOS , MVT::f32, Expand);
109 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
110 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
112 setOperationAction(ISD::FPOW , MVT::f32, Expand);
113 setOperationAction(ISD::FPOW , MVT::f64, Expand);
115 setOperationAction(ISD::SETCC, MVT::f32, Promote);
117 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Promote);
119 // We don't have line number support yet.
120 setOperationAction(ISD::DBG_STOPPOINT, MVT::Other, Expand);
121 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
122 setOperationAction(ISD::DBG_LABEL, MVT::Other, Expand);
123 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
125 // Not implemented yet.
126 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
127 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
128 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
130 // We want to legalize GlobalAddress and ConstantPool and
131 // ExternalSymbols nodes into the appropriate instructions to
132 // materialize the address.
133 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
134 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
135 setOperationAction(ISD::ExternalSymbol, MVT::i64, Custom);
136 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
138 setOperationAction(ISD::VASTART, MVT::Other, Custom);
139 setOperationAction(ISD::VAEND, MVT::Other, Expand);
140 setOperationAction(ISD::VACOPY, MVT::Other, Custom);
141 setOperationAction(ISD::VAARG, MVT::Other, Custom);
142 setOperationAction(ISD::VAARG, MVT::i32, Custom);
144 setOperationAction(ISD::RET, MVT::Other, Custom);
146 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
147 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
149 setStackPointerRegisterToSaveRestore(Alpha::R30);
151 addLegalFPImmediate(APFloat(+0.0)); //F31
152 addLegalFPImmediate(APFloat(+0.0f)); //F31
153 addLegalFPImmediate(APFloat(-0.0)); //-F31
154 addLegalFPImmediate(APFloat(-0.0f)); //-F31
157 setJumpBufAlignment(16);
159 computeRegisterProperties();
162 MVT AlphaTargetLowering::getSetCCResultType(MVT VT) const {
166 const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
169 case AlphaISD::CVTQT_: return "Alpha::CVTQT_";
170 case AlphaISD::CVTQS_: return "Alpha::CVTQS_";
171 case AlphaISD::CVTTQ_: return "Alpha::CVTTQ_";
172 case AlphaISD::GPRelHi: return "Alpha::GPRelHi";
173 case AlphaISD::GPRelLo: return "Alpha::GPRelLo";
174 case AlphaISD::RelLit: return "Alpha::RelLit";
175 case AlphaISD::GlobalRetAddr: return "Alpha::GlobalRetAddr";
176 case AlphaISD::CALL: return "Alpha::CALL";
177 case AlphaISD::DivCall: return "Alpha::DivCall";
178 case AlphaISD::RET_FLAG: return "Alpha::RET_FLAG";
179 case AlphaISD::COND_BRANCH_I: return "Alpha::COND_BRANCH_I";
180 case AlphaISD::COND_BRANCH_F: return "Alpha::COND_BRANCH_F";
184 static SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) {
185 MVT PtrVT = Op.getValueType();
186 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
187 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
188 SDValue Zero = DAG.getConstant(0, PtrVT);
190 SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, JTI,
191 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
192 SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, JTI, Hi);
196 //http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/
197 //AA-PY8AC-TET1_html/callCH3.html#BLOCK21
199 //For now, just use variable size stack frame format
201 //In a standard call, the first six items are passed in registers $16
202 //- $21 and/or registers $f16 - $f21. (See Section 4.1.2 for details
203 //of argument-to-register correspondence.) The remaining items are
204 //collected in a memory argument list that is a naturally aligned
205 //array of quadwords. In a standard call, this list, if present, must
206 //be passed at 0(SP).
207 //7 ... n 0(SP) ... (n-7)*8(SP)
215 static SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG,
217 int &VarArgsOffset) {
218 MachineFunction &MF = DAG.getMachineFunction();
219 MachineFrameInfo *MFI = MF.getFrameInfo();
220 std::vector<SDValue> ArgValues;
221 SDValue Root = Op.getOperand(0);
223 AddLiveIn(MF, Alpha::R29, &Alpha::GPRCRegClass); //GP
224 AddLiveIn(MF, Alpha::R26, &Alpha::GPRCRegClass); //RA
226 unsigned args_int[] = {
227 Alpha::R16, Alpha::R17, Alpha::R18, Alpha::R19, Alpha::R20, Alpha::R21};
228 unsigned args_float[] = {
229 Alpha::F16, Alpha::F17, Alpha::F18, Alpha::F19, Alpha::F20, Alpha::F21};
231 for (unsigned ArgNo = 0, e = Op.getNode()->getNumValues()-1; ArgNo != e; ++ArgNo) {
233 MVT ObjectVT = Op.getValue(ArgNo).getValueType();
237 switch (ObjectVT.getSimpleVT()) {
239 assert(false && "Invalid value type!");
241 args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
242 &Alpha::F8RCRegClass);
243 ArgVal = DAG.getCopyFromReg(Root, args_float[ArgNo], ObjectVT);
246 args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
247 &Alpha::F4RCRegClass);
248 ArgVal = DAG.getCopyFromReg(Root, args_float[ArgNo], ObjectVT);
251 args_int[ArgNo] = AddLiveIn(MF, args_int[ArgNo],
252 &Alpha::GPRCRegClass);
253 ArgVal = DAG.getCopyFromReg(Root, args_int[ArgNo], MVT::i64);
257 // Create the frame index object for this incoming parameter...
258 int FI = MFI->CreateFixedObject(8, 8 * (ArgNo - 6));
260 // Create the SelectionDAG nodes corresponding to a load
261 //from this parameter
262 SDValue FIN = DAG.getFrameIndex(FI, MVT::i64);
263 ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
265 ArgValues.push_back(ArgVal);
268 // If the functions takes variable number of arguments, copy all regs to stack
269 bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() != 0;
271 VarArgsOffset = (Op.getNode()->getNumValues()-1) * 8;
272 std::vector<SDValue> LS;
273 for (int i = 0; i < 6; ++i) {
274 if (TargetRegisterInfo::isPhysicalRegister(args_int[i]))
275 args_int[i] = AddLiveIn(MF, args_int[i], &Alpha::GPRCRegClass);
276 SDValue argt = DAG.getCopyFromReg(Root, args_int[i], MVT::i64);
277 int FI = MFI->CreateFixedObject(8, -8 * (6 - i));
278 if (i == 0) VarArgsBase = FI;
279 SDValue SDFI = DAG.getFrameIndex(FI, MVT::i64);
280 LS.push_back(DAG.getStore(Root, argt, SDFI, NULL, 0));
282 if (TargetRegisterInfo::isPhysicalRegister(args_float[i]))
283 args_float[i] = AddLiveIn(MF, args_float[i], &Alpha::F8RCRegClass);
284 argt = DAG.getCopyFromReg(Root, args_float[i], MVT::f64);
285 FI = MFI->CreateFixedObject(8, - 8 * (12 - i));
286 SDFI = DAG.getFrameIndex(FI, MVT::i64);
287 LS.push_back(DAG.getStore(Root, argt, SDFI, NULL, 0));
290 //Set up a token factor with all the stack traffic
291 Root = DAG.getNode(ISD::TokenFactor, MVT::Other, &LS[0], LS.size());
294 ArgValues.push_back(Root);
296 // Return the new list of results.
297 return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
298 &ArgValues[0], ArgValues.size());
301 static SDValue LowerRET(SDValue Op, SelectionDAG &DAG) {
302 SDValue Copy = DAG.getCopyToReg(Op.getOperand(0), Alpha::R26,
303 DAG.getNode(AlphaISD::GlobalRetAddr,
306 switch (Op.getNumOperands()) {
308 assert(0 && "Do not know how to return this many arguments!");
312 //return SDValue(); // ret void is legal
314 MVT ArgVT = Op.getOperand(1).getValueType();
316 if (ArgVT.isInteger())
319 assert(ArgVT.isFloatingPoint());
322 Copy = DAG.getCopyToReg(Copy, ArgReg, Op.getOperand(1), Copy.getValue(1));
323 if (DAG.getMachineFunction().getRegInfo().liveout_empty())
324 DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg);
328 MVT ArgVT = Op.getOperand(1).getValueType();
329 unsigned ArgReg1, ArgReg2;
330 if (ArgVT.isInteger()) {
334 assert(ArgVT.isFloatingPoint());
338 Copy = DAG.getCopyToReg(Copy, ArgReg1, Op.getOperand(1), Copy.getValue(1));
339 if (std::find(DAG.getMachineFunction().getRegInfo().liveout_begin(),
340 DAG.getMachineFunction().getRegInfo().liveout_end(), ArgReg1)
341 == DAG.getMachineFunction().getRegInfo().liveout_end())
342 DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg1);
343 Copy = DAG.getCopyToReg(Copy, ArgReg2, Op.getOperand(3), Copy.getValue(1));
344 if (std::find(DAG.getMachineFunction().getRegInfo().liveout_begin(),
345 DAG.getMachineFunction().getRegInfo().liveout_end(), ArgReg2)
346 == DAG.getMachineFunction().getRegInfo().liveout_end())
347 DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg2);
351 return DAG.getNode(AlphaISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
354 std::pair<SDValue, SDValue>
355 AlphaTargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
356 bool RetSExt, bool RetZExt, bool isVarArg,
357 bool isInreg, unsigned CallingConv,
358 bool isTailCall, SDValue Callee,
359 ArgListTy &Args, SelectionDAG &DAG,
363 NumBytes = (Args.size() - 6) * 8;
365 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
366 std::vector<SDValue> args_to_use;
367 for (unsigned i = 0, e = Args.size(); i != e; ++i)
369 switch (getValueType(Args[i].Ty).getSimpleVT()) {
370 default: assert(0 && "Unexpected ValueType for argument!");
375 // Promote the integer to 64 bits. If the input type is signed use a
376 // sign extend, otherwise use a zero extend.
378 Args[i].Node = DAG.getNode(ISD::SIGN_EXTEND, dl,
379 MVT::i64, Args[i].Node);
380 else if (Args[i].isZExt)
381 Args[i].Node = DAG.getNode(ISD::ZERO_EXTEND, dl,
382 MVT::i64, Args[i].Node);
384 Args[i].Node = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i64, Args[i].Node);
391 args_to_use.push_back(Args[i].Node);
394 std::vector<MVT> RetVals;
395 MVT RetTyVT = getValueType(RetTy);
396 MVT ActualRetTyVT = RetTyVT;
397 if (RetTyVT.getSimpleVT() >= MVT::i1 && RetTyVT.getSimpleVT() <= MVT::i32)
398 ActualRetTyVT = MVT::i64;
400 if (RetTyVT != MVT::isVoid)
401 RetVals.push_back(ActualRetTyVT);
402 RetVals.push_back(MVT::Other);
404 std::vector<SDValue> Ops;
405 Ops.push_back(Chain);
406 Ops.push_back(Callee);
407 Ops.insert(Ops.end(), args_to_use.begin(), args_to_use.end());
408 SDValue TheCall = DAG.getNode(AlphaISD::CALL, dl,
409 RetVals, &Ops[0], Ops.size());
410 Chain = TheCall.getValue(RetTyVT != MVT::isVoid);
411 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
412 DAG.getIntPtrConstant(0, true), SDValue());
413 SDValue RetVal = TheCall;
415 if (RetTyVT != ActualRetTyVT) {
416 ISD::NodeType AssertKind = ISD::DELETED_NODE;
418 AssertKind = ISD::AssertSext;
420 AssertKind = ISD::AssertZext;
422 if (AssertKind != ISD::DELETED_NODE)
423 RetVal = DAG.getNode(AssertKind, dl, MVT::i64, RetVal,
424 DAG.getValueType(RetTyVT));
426 RetVal = DAG.getNode(ISD::TRUNCATE, dl, RetTyVT, RetVal);
429 return std::make_pair(RetVal, Chain);
432 void AlphaTargetLowering::LowerVAARG(SDNode *N, SDValue &Chain,
433 SDValue &DataPtr, SelectionDAG &DAG) {
434 Chain = N->getOperand(0);
435 SDValue VAListP = N->getOperand(1);
436 const Value *VAListS = cast<SrcValueSDNode>(N->getOperand(2))->getValue();
438 SDValue Base = DAG.getLoad(MVT::i64, Chain, VAListP, VAListS, 0);
439 SDValue Tmp = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
440 DAG.getConstant(8, MVT::i64));
441 SDValue Offset = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Base.getValue(1),
442 Tmp, NULL, 0, MVT::i32);
443 DataPtr = DAG.getNode(ISD::ADD, MVT::i64, Base, Offset);
444 if (N->getValueType(0).isFloatingPoint())
446 //if fp && Offset < 6*8, then subtract 6*8 from DataPtr
447 SDValue FPDataPtr = DAG.getNode(ISD::SUB, MVT::i64, DataPtr,
448 DAG.getConstant(8*6, MVT::i64));
449 SDValue CC = DAG.getSetCC(MVT::i64, Offset,
450 DAG.getConstant(8*6, MVT::i64), ISD::SETLT);
451 DataPtr = DAG.getNode(ISD::SELECT, MVT::i64, CC, FPDataPtr, DataPtr);
454 SDValue NewOffset = DAG.getNode(ISD::ADD, MVT::i64, Offset,
455 DAG.getConstant(8, MVT::i64));
456 Chain = DAG.getTruncStore(Offset.getValue(1), NewOffset, Tmp, NULL, 0,
460 /// LowerOperation - Provide custom lowering hooks for some operations.
462 SDValue AlphaTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
463 switch (Op.getOpcode()) {
464 default: assert(0 && "Wasn't expecting to be able to lower this!");
465 case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG,
469 case ISD::RET: return LowerRET(Op,DAG);
470 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
472 case ISD::INTRINSIC_WO_CHAIN: {
473 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
475 default: break; // Don't custom lower most intrinsics.
476 case Intrinsic::alpha_umulh:
477 return DAG.getNode(ISD::MULHU, MVT::i64, Op.getOperand(1), Op.getOperand(2));
481 case ISD::SINT_TO_FP: {
482 assert(Op.getOperand(0).getValueType() == MVT::i64 &&
483 "Unhandled SINT_TO_FP type in custom expander!");
485 bool isDouble = Op.getValueType() == MVT::f64;
486 LD = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, Op.getOperand(0));
487 SDValue FP = DAG.getNode(isDouble?AlphaISD::CVTQT_:AlphaISD::CVTQS_,
488 isDouble?MVT::f64:MVT::f32, LD);
491 case ISD::FP_TO_SINT: {
492 bool isDouble = Op.getOperand(0).getValueType() == MVT::f64;
493 SDValue src = Op.getOperand(0);
495 if (!isDouble) //Promote
496 src = DAG.getNode(ISD::FP_EXTEND, MVT::f64, src);
498 src = DAG.getNode(AlphaISD::CVTTQ_, MVT::f64, src);
500 return DAG.getNode(ISD::BIT_CONVERT, MVT::i64, src);
502 case ISD::ConstantPool: {
503 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
504 Constant *C = CP->getConstVal();
505 SDValue CPI = DAG.getTargetConstantPool(C, MVT::i64, CP->getAlignment());
507 SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, CPI,
508 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
509 SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, CPI, Hi);
512 case ISD::GlobalTLSAddress:
513 assert(0 && "TLS not implemented for Alpha.");
514 case ISD::GlobalAddress: {
515 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
516 GlobalValue *GV = GSDN->getGlobal();
517 SDValue GA = DAG.getTargetGlobalAddress(GV, MVT::i64, GSDN->getOffset());
519 // if (!GV->hasWeakLinkage() && !GV->isDeclaration() && !GV->hasLinkOnceLinkage()) {
520 if (GV->hasLocalLinkage()) {
521 SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, GA,
522 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
523 SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, GA, Hi);
526 return DAG.getNode(AlphaISD::RelLit, MVT::i64, GA,
527 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
529 case ISD::ExternalSymbol: {
530 return DAG.getNode(AlphaISD::RelLit, MVT::i64,
531 DAG.getTargetExternalSymbol(cast<ExternalSymbolSDNode>(Op)
532 ->getSymbol(), MVT::i64),
533 DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i64));
538 //Expand only on constant case
539 if (Op.getOperand(1).getOpcode() == ISD::Constant) {
540 MVT VT = Op.getNode()->getValueType(0);
541 SDValue Tmp1 = Op.getNode()->getOpcode() == ISD::UREM ?
542 BuildUDIV(Op.getNode(), DAG, NULL) :
543 BuildSDIV(Op.getNode(), DAG, NULL);
544 Tmp1 = DAG.getNode(ISD::MUL, VT, Tmp1, Op.getOperand(1));
545 Tmp1 = DAG.getNode(ISD::SUB, VT, Op.getOperand(0), Tmp1);
551 if (Op.getValueType().isInteger()) {
552 if (Op.getOperand(1).getOpcode() == ISD::Constant)
553 return Op.getOpcode() == ISD::SDIV ? BuildSDIV(Op.getNode(), DAG, NULL)
554 : BuildUDIV(Op.getNode(), DAG, NULL);
555 const char* opstr = 0;
556 switch (Op.getOpcode()) {
557 case ISD::UREM: opstr = "__remqu"; break;
558 case ISD::SREM: opstr = "__remq"; break;
559 case ISD::UDIV: opstr = "__divqu"; break;
560 case ISD::SDIV: opstr = "__divq"; break;
562 SDValue Tmp1 = Op.getOperand(0),
563 Tmp2 = Op.getOperand(1),
564 Addr = DAG.getExternalSymbol(opstr, MVT::i64);
565 return DAG.getNode(AlphaISD::DivCall, MVT::i64, Addr, Tmp1, Tmp2);
570 SDValue Chain, DataPtr;
571 LowerVAARG(Op.getNode(), Chain, DataPtr, DAG);
574 if (Op.getValueType() == MVT::i32)
575 Result = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Chain, DataPtr,
578 Result = DAG.getLoad(Op.getValueType(), Chain, DataPtr, NULL, 0);
582 SDValue Chain = Op.getOperand(0);
583 SDValue DestP = Op.getOperand(1);
584 SDValue SrcP = Op.getOperand(2);
585 const Value *DestS = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
586 const Value *SrcS = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
588 SDValue Val = DAG.getLoad(getPointerTy(), Chain, SrcP, SrcS, 0);
589 SDValue Result = DAG.getStore(Val.getValue(1), Val, DestP, DestS, 0);
590 SDValue NP = DAG.getNode(ISD::ADD, MVT::i64, SrcP,
591 DAG.getConstant(8, MVT::i64));
592 Val = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Result, NP, NULL,0, MVT::i32);
593 SDValue NPD = DAG.getNode(ISD::ADD, MVT::i64, DestP,
594 DAG.getConstant(8, MVT::i64));
595 return DAG.getTruncStore(Val.getValue(1), Val, NPD, NULL, 0, MVT::i32);
598 SDValue Chain = Op.getOperand(0);
599 SDValue VAListP = Op.getOperand(1);
600 const Value *VAListS = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
602 // vastart stores the address of the VarArgsBase and VarArgsOffset
603 SDValue FR = DAG.getFrameIndex(VarArgsBase, MVT::i64);
604 SDValue S1 = DAG.getStore(Chain, FR, VAListP, VAListS, 0);
605 SDValue SA2 = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
606 DAG.getConstant(8, MVT::i64));
607 return DAG.getTruncStore(S1, DAG.getConstant(VarArgsOffset, MVT::i64),
608 SA2, NULL, 0, MVT::i32);
610 case ISD::RETURNADDR:
611 return DAG.getNode(AlphaISD::GlobalRetAddr, MVT::i64);
613 case ISD::FRAMEADDR: break;
619 void AlphaTargetLowering::ReplaceNodeResults(SDNode *N,
620 SmallVectorImpl<SDValue>&Results,
622 assert(N->getValueType(0) == MVT::i32 &&
623 N->getOpcode() == ISD::VAARG &&
624 "Unknown node to custom promote!");
626 SDValue Chain, DataPtr;
627 LowerVAARG(N, Chain, DataPtr, DAG);
628 SDValue Res = DAG.getLoad(N->getValueType(0), Chain, DataPtr, NULL, 0);
629 Results.push_back(Res);
630 Results.push_back(SDValue(Res.getNode(), 1));
636 /// getConstraintType - Given a constraint letter, return the type of
637 /// constraint it is for this target.
638 AlphaTargetLowering::ConstraintType
639 AlphaTargetLowering::getConstraintType(const std::string &Constraint) const {
640 if (Constraint.size() == 1) {
641 switch (Constraint[0]) {
645 return C_RegisterClass;
648 return TargetLowering::getConstraintType(Constraint);
651 std::vector<unsigned> AlphaTargetLowering::
652 getRegClassForInlineAsmConstraint(const std::string &Constraint,
654 if (Constraint.size() == 1) {
655 switch (Constraint[0]) {
656 default: break; // Unknown constriant letter
658 return make_vector<unsigned>(Alpha::F0 , Alpha::F1 , Alpha::F2 ,
659 Alpha::F3 , Alpha::F4 , Alpha::F5 ,
660 Alpha::F6 , Alpha::F7 , Alpha::F8 ,
661 Alpha::F9 , Alpha::F10, Alpha::F11,
662 Alpha::F12, Alpha::F13, Alpha::F14,
663 Alpha::F15, Alpha::F16, Alpha::F17,
664 Alpha::F18, Alpha::F19, Alpha::F20,
665 Alpha::F21, Alpha::F22, Alpha::F23,
666 Alpha::F24, Alpha::F25, Alpha::F26,
667 Alpha::F27, Alpha::F28, Alpha::F29,
668 Alpha::F30, Alpha::F31, 0);
670 return make_vector<unsigned>(Alpha::R0 , Alpha::R1 , Alpha::R2 ,
671 Alpha::R3 , Alpha::R4 , Alpha::R5 ,
672 Alpha::R6 , Alpha::R7 , Alpha::R8 ,
673 Alpha::R9 , Alpha::R10, Alpha::R11,
674 Alpha::R12, Alpha::R13, Alpha::R14,
675 Alpha::R15, Alpha::R16, Alpha::R17,
676 Alpha::R18, Alpha::R19, Alpha::R20,
677 Alpha::R21, Alpha::R22, Alpha::R23,
678 Alpha::R24, Alpha::R25, Alpha::R26,
679 Alpha::R27, Alpha::R28, Alpha::R29,
680 Alpha::R30, Alpha::R31, 0);
684 return std::vector<unsigned>();
686 //===----------------------------------------------------------------------===//
687 // Other Lowering Code
688 //===----------------------------------------------------------------------===//
691 AlphaTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
692 MachineBasicBlock *BB) {
693 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
694 assert((MI->getOpcode() == Alpha::CAS32 ||
695 MI->getOpcode() == Alpha::CAS64 ||
696 MI->getOpcode() == Alpha::LAS32 ||
697 MI->getOpcode() == Alpha::LAS64 ||
698 MI->getOpcode() == Alpha::SWAP32 ||
699 MI->getOpcode() == Alpha::SWAP64) &&
700 "Unexpected instr type to insert");
702 bool is32 = MI->getOpcode() == Alpha::CAS32 ||
703 MI->getOpcode() == Alpha::LAS32 ||
704 MI->getOpcode() == Alpha::SWAP32;
706 //Load locked store conditional for atomic ops take on the same form
709 //do stuff (maybe branch to exit)
711 //test sc and maybe branck to start
713 const BasicBlock *LLVM_BB = BB->getBasicBlock();
714 MachineFunction::iterator It = BB;
717 MachineBasicBlock *thisMBB = BB;
718 MachineFunction *F = BB->getParent();
719 MachineBasicBlock *llscMBB = F->CreateMachineBasicBlock(LLVM_BB);
720 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
722 sinkMBB->transferSuccessors(thisMBB);
724 F->insert(It, llscMBB);
725 F->insert(It, sinkMBB);
727 BuildMI(thisMBB, TII->get(Alpha::BR)).addMBB(llscMBB);
729 unsigned reg_res = MI->getOperand(0).getReg(),
730 reg_ptr = MI->getOperand(1).getReg(),
731 reg_v2 = MI->getOperand(2).getReg(),
732 reg_store = F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
734 BuildMI(llscMBB, TII->get(is32 ? Alpha::LDL_L : Alpha::LDQ_L),
735 reg_res).addImm(0).addReg(reg_ptr);
736 switch (MI->getOpcode()) {
740 = F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
741 BuildMI(llscMBB, TII->get(Alpha::CMPEQ), reg_cmp)
742 .addReg(reg_v2).addReg(reg_res);
743 BuildMI(llscMBB, TII->get(Alpha::BEQ))
744 .addImm(0).addReg(reg_cmp).addMBB(sinkMBB);
745 BuildMI(llscMBB, TII->get(Alpha::BISr), reg_store)
746 .addReg(Alpha::R31).addReg(MI->getOperand(3).getReg());
751 BuildMI(llscMBB, TII->get(is32 ? Alpha::ADDLr : Alpha::ADDQr), reg_store)
752 .addReg(reg_res).addReg(reg_v2);
756 case Alpha::SWAP64: {
757 BuildMI(llscMBB, TII->get(Alpha::BISr), reg_store)
758 .addReg(reg_v2).addReg(reg_v2);
762 BuildMI(llscMBB, TII->get(is32 ? Alpha::STL_C : Alpha::STQ_C), reg_store)
763 .addReg(reg_store).addImm(0).addReg(reg_ptr);
764 BuildMI(llscMBB, TII->get(Alpha::BEQ))
765 .addImm(0).addReg(reg_store).addMBB(llscMBB);
766 BuildMI(llscMBB, TII->get(Alpha::BR)).addMBB(sinkMBB);
768 thisMBB->addSuccessor(llscMBB);
769 llscMBB->addSuccessor(llscMBB);
770 llscMBB->addSuccessor(sinkMBB);
771 F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
777 AlphaTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
778 // The Alpha target isn't yet aware of offsets.