1 //===-- MipsISelLowering.cpp - Mips 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 defines the interfaces that Mips uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "mips-lower"
16 #include "MipsISelLowering.h"
17 #include "MipsMachineFunction.h"
18 #include "MipsTargetMachine.h"
19 #include "MipsTargetObjectFile.h"
20 #include "MipsSubtarget.h"
21 #include "InstPrinter/MipsInstPrinter.h"
22 #include "MCTargetDesc/MipsBaseInfo.h"
23 #include "llvm/DerivedTypes.h"
24 #include "llvm/Function.h"
25 #include "llvm/GlobalVariable.h"
26 #include "llvm/Intrinsics.h"
27 #include "llvm/CallingConv.h"
28 #include "llvm/CodeGen/CallingConvLower.h"
29 #include "llvm/CodeGen/MachineFrameInfo.h"
30 #include "llvm/CodeGen/MachineFunction.h"
31 #include "llvm/CodeGen/MachineInstrBuilder.h"
32 #include "llvm/CodeGen/MachineRegisterInfo.h"
33 #include "llvm/CodeGen/SelectionDAGISel.h"
34 #include "llvm/CodeGen/ValueTypes.h"
35 #include "llvm/Support/Debug.h"
36 #include "llvm/Support/ErrorHandling.h"
39 // If I is a shifted mask, set the size (Size) and the first bit of the
40 // mask (Pos), and return true.
41 // For example, if I is 0x003ff800, (Pos, Size) = (11, 11).
42 static bool IsShiftedMask(uint64_t I, uint64_t &Pos, uint64_t &Size) {
43 if (!isShiftedMask_64(I))
46 Size = CountPopulation_64(I);
47 Pos = CountTrailingZeros_64(I);
51 static SDValue GetGlobalReg(SelectionDAG &DAG, EVT Ty) {
52 MipsFunctionInfo *FI = DAG.getMachineFunction().getInfo<MipsFunctionInfo>();
53 return DAG.getRegister(FI->getGlobalBaseReg(), Ty);
56 const char *MipsTargetLowering::getTargetNodeName(unsigned Opcode) const {
58 case MipsISD::JmpLink: return "MipsISD::JmpLink";
59 case MipsISD::Hi: return "MipsISD::Hi";
60 case MipsISD::Lo: return "MipsISD::Lo";
61 case MipsISD::GPRel: return "MipsISD::GPRel";
62 case MipsISD::ThreadPointer: return "MipsISD::ThreadPointer";
63 case MipsISD::Ret: return "MipsISD::Ret";
64 case MipsISD::FPBrcond: return "MipsISD::FPBrcond";
65 case MipsISD::FPCmp: return "MipsISD::FPCmp";
66 case MipsISD::CMovFP_T: return "MipsISD::CMovFP_T";
67 case MipsISD::CMovFP_F: return "MipsISD::CMovFP_F";
68 case MipsISD::FPRound: return "MipsISD::FPRound";
69 case MipsISD::MAdd: return "MipsISD::MAdd";
70 case MipsISD::MAddu: return "MipsISD::MAddu";
71 case MipsISD::MSub: return "MipsISD::MSub";
72 case MipsISD::MSubu: return "MipsISD::MSubu";
73 case MipsISD::DivRem: return "MipsISD::DivRem";
74 case MipsISD::DivRemU: return "MipsISD::DivRemU";
75 case MipsISD::BuildPairF64: return "MipsISD::BuildPairF64";
76 case MipsISD::ExtractElementF64: return "MipsISD::ExtractElementF64";
77 case MipsISD::Wrapper: return "MipsISD::Wrapper";
78 case MipsISD::DynAlloc: return "MipsISD::DynAlloc";
79 case MipsISD::Sync: return "MipsISD::Sync";
80 case MipsISD::Ext: return "MipsISD::Ext";
81 case MipsISD::Ins: return "MipsISD::Ins";
87 MipsTargetLowering(MipsTargetMachine &TM)
88 : TargetLowering(TM, new MipsTargetObjectFile()),
89 Subtarget(&TM.getSubtarget<MipsSubtarget>()),
90 HasMips64(Subtarget->hasMips64()), IsN64(Subtarget->isABI_N64()),
91 IsO32(Subtarget->isABI_O32()) {
93 // Mips does not have i1 type, so use i32 for
94 // setcc operations results (slt, sgt, ...).
95 setBooleanContents(ZeroOrOneBooleanContent);
96 setBooleanVectorContents(ZeroOrOneBooleanContent); // FIXME: Is this correct?
98 // Set up the register classes
99 addRegisterClass(MVT::i32, Mips::CPURegsRegisterClass);
102 addRegisterClass(MVT::i64, Mips::CPU64RegsRegisterClass);
104 if (!TM.Options.UseSoftFloat) {
105 addRegisterClass(MVT::f32, Mips::FGR32RegisterClass);
107 // When dealing with single precision only, use libcalls
108 if (!Subtarget->isSingleFloat()) {
110 addRegisterClass(MVT::f64, Mips::FGR64RegisterClass);
112 addRegisterClass(MVT::f64, Mips::AFGR64RegisterClass);
116 // Load extented operations for i1 types must be promoted
117 setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
118 setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
119 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
121 // MIPS doesn't have extending float->double load/store
122 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
123 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
125 // Used by legalize types to correctly generate the setcc result.
126 // Without this, every float setcc comes with a AND/OR with the result,
127 // we don't want this, since the fpcmp result goes to a flag register,
128 // which is used implicitly by brcond and select operations.
129 AddPromotedToType(ISD::SETCC, MVT::i1, MVT::i32);
131 // Mips Custom Operations
132 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
133 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
134 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
135 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
136 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
137 setOperationAction(ISD::SELECT, MVT::f32, Custom);
138 setOperationAction(ISD::SELECT, MVT::f64, Custom);
139 setOperationAction(ISD::SELECT, MVT::i32, Custom);
140 setOperationAction(ISD::SETCC, MVT::f32, Custom);
141 setOperationAction(ISD::SETCC, MVT::f64, Custom);
142 setOperationAction(ISD::BRCOND, MVT::Other, Custom);
143 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
144 setOperationAction(ISD::VASTART, MVT::Other, Custom);
145 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
146 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
147 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
148 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
150 if (!TM.Options.NoNaNsFPMath) {
151 setOperationAction(ISD::FABS, MVT::f32, Custom);
152 setOperationAction(ISD::FABS, MVT::f64, Custom);
156 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
157 setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
158 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
159 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
160 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
161 setOperationAction(ISD::SELECT, MVT::i64, Custom);
162 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Custom);
165 setOperationAction(ISD::SDIV, MVT::i32, Expand);
166 setOperationAction(ISD::SREM, MVT::i32, Expand);
167 setOperationAction(ISD::UDIV, MVT::i32, Expand);
168 setOperationAction(ISD::UREM, MVT::i32, Expand);
169 setOperationAction(ISD::SDIV, MVT::i64, Expand);
170 setOperationAction(ISD::SREM, MVT::i64, Expand);
171 setOperationAction(ISD::UDIV, MVT::i64, Expand);
172 setOperationAction(ISD::UREM, MVT::i64, Expand);
174 // Operations not directly supported by Mips.
175 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
176 setOperationAction(ISD::BR_CC, MVT::Other, Expand);
177 setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
178 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
179 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
180 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
181 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
182 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
183 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
184 setOperationAction(ISD::CTPOP, MVT::i64, Expand);
185 setOperationAction(ISD::CTTZ, MVT::i32, Expand);
186 setOperationAction(ISD::CTTZ, MVT::i64, Expand);
187 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
188 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
189 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
190 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
191 setOperationAction(ISD::ROTL, MVT::i32, Expand);
192 setOperationAction(ISD::ROTL, MVT::i64, Expand);
194 if (!Subtarget->hasMips32r2())
195 setOperationAction(ISD::ROTR, MVT::i32, Expand);
197 if (!Subtarget->hasMips64r2())
198 setOperationAction(ISD::ROTR, MVT::i64, Expand);
200 setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
201 setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
202 setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
203 setOperationAction(ISD::FSIN, MVT::f32, Expand);
204 setOperationAction(ISD::FSIN, MVT::f64, Expand);
205 setOperationAction(ISD::FCOS, MVT::f32, Expand);
206 setOperationAction(ISD::FCOS, MVT::f64, Expand);
207 setOperationAction(ISD::FPOWI, MVT::f32, Expand);
208 setOperationAction(ISD::FPOW, MVT::f32, Expand);
209 setOperationAction(ISD::FPOW, MVT::f64, Expand);
210 setOperationAction(ISD::FLOG, MVT::f32, Expand);
211 setOperationAction(ISD::FLOG2, MVT::f32, Expand);
212 setOperationAction(ISD::FLOG10, MVT::f32, Expand);
213 setOperationAction(ISD::FEXP, MVT::f32, Expand);
214 setOperationAction(ISD::FMA, MVT::f32, Expand);
215 setOperationAction(ISD::FMA, MVT::f64, Expand);
216 setOperationAction(ISD::FREM, MVT::f32, Expand);
217 setOperationAction(ISD::FREM, MVT::f64, Expand);
219 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
220 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
221 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
222 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
224 setOperationAction(ISD::VAARG, MVT::Other, Expand);
225 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
226 setOperationAction(ISD::VAEND, MVT::Other, Expand);
228 // Use the default for now
229 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
230 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
232 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Expand);
233 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand);
234 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);
235 setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
237 setInsertFencesForAtomic(true);
239 if (Subtarget->isSingleFloat())
240 setOperationAction(ISD::SELECT_CC, MVT::f64, Expand);
242 if (!Subtarget->hasSEInReg()) {
243 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
244 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
247 if (!Subtarget->hasBitCount()) {
248 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
249 setOperationAction(ISD::CTLZ, MVT::i64, Expand);
252 if (!Subtarget->hasSwap()) {
253 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
254 setOperationAction(ISD::BSWAP, MVT::i64, Expand);
257 setTargetDAGCombine(ISD::ADDE);
258 setTargetDAGCombine(ISD::SUBE);
259 setTargetDAGCombine(ISD::SDIVREM);
260 setTargetDAGCombine(ISD::UDIVREM);
261 setTargetDAGCombine(ISD::SELECT);
262 setTargetDAGCombine(ISD::AND);
263 setTargetDAGCombine(ISD::OR);
265 setMinFunctionAlignment(HasMips64 ? 3 : 2);
267 setStackPointerRegisterToSaveRestore(IsN64 ? Mips::SP_64 : Mips::SP);
268 computeRegisterProperties();
270 setExceptionPointerRegister(IsN64 ? Mips::A0_64 : Mips::A0);
271 setExceptionSelectorRegister(IsN64 ? Mips::A1_64 : Mips::A1);
274 bool MipsTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
275 MVT::SimpleValueType SVT = VT.getSimpleVT().SimpleTy;
283 return Subtarget->hasMips32r2Or64();
289 EVT MipsTargetLowering::getSetCCResultType(EVT VT) const {
294 // Transforms a subgraph in CurDAG if the following pattern is found:
295 // (addc multLo, Lo0), (adde multHi, Hi0),
297 // multHi/Lo: product of multiplication
298 // Lo0: initial value of Lo register
299 // Hi0: initial value of Hi register
300 // Return true if pattern matching was successful.
301 static bool SelectMadd(SDNode* ADDENode, SelectionDAG* CurDAG) {
302 // ADDENode's second operand must be a flag output of an ADDC node in order
303 // for the matching to be successful.
304 SDNode* ADDCNode = ADDENode->getOperand(2).getNode();
306 if (ADDCNode->getOpcode() != ISD::ADDC)
309 SDValue MultHi = ADDENode->getOperand(0);
310 SDValue MultLo = ADDCNode->getOperand(0);
311 SDNode* MultNode = MultHi.getNode();
312 unsigned MultOpc = MultHi.getOpcode();
314 // MultHi and MultLo must be generated by the same node,
315 if (MultLo.getNode() != MultNode)
318 // and it must be a multiplication.
319 if (MultOpc != ISD::SMUL_LOHI && MultOpc != ISD::UMUL_LOHI)
322 // MultLo amd MultHi must be the first and second output of MultNode
324 if (MultHi.getResNo() != 1 || MultLo.getResNo() != 0)
327 // Transform this to a MADD only if ADDENode and ADDCNode are the only users
328 // of the values of MultNode, in which case MultNode will be removed in later
330 // If there exist users other than ADDENode or ADDCNode, this function returns
331 // here, which will result in MultNode being mapped to a single MULT
332 // instruction node rather than a pair of MULT and MADD instructions being
334 if (!MultHi.hasOneUse() || !MultLo.hasOneUse())
337 SDValue Chain = CurDAG->getEntryNode();
338 DebugLoc dl = ADDENode->getDebugLoc();
340 // create MipsMAdd(u) node
341 MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MAddu : MipsISD::MAdd;
343 SDValue MAdd = CurDAG->getNode(MultOpc, dl, MVT::Glue,
344 MultNode->getOperand(0),// Factor 0
345 MultNode->getOperand(1),// Factor 1
346 ADDCNode->getOperand(1),// Lo0
347 ADDENode->getOperand(1));// Hi0
349 // create CopyFromReg nodes
350 SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, dl, Mips::LO, MVT::i32,
352 SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), dl,
354 CopyFromLo.getValue(2));
356 // replace uses of adde and addc here
357 if (!SDValue(ADDCNode, 0).use_empty())
358 CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDCNode, 0), CopyFromLo);
360 if (!SDValue(ADDENode, 0).use_empty())
361 CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDENode, 0), CopyFromHi);
367 // Transforms a subgraph in CurDAG if the following pattern is found:
368 // (addc Lo0, multLo), (sube Hi0, multHi),
370 // multHi/Lo: product of multiplication
371 // Lo0: initial value of Lo register
372 // Hi0: initial value of Hi register
373 // Return true if pattern matching was successful.
374 static bool SelectMsub(SDNode* SUBENode, SelectionDAG* CurDAG) {
375 // SUBENode's second operand must be a flag output of an SUBC node in order
376 // for the matching to be successful.
377 SDNode* SUBCNode = SUBENode->getOperand(2).getNode();
379 if (SUBCNode->getOpcode() != ISD::SUBC)
382 SDValue MultHi = SUBENode->getOperand(1);
383 SDValue MultLo = SUBCNode->getOperand(1);
384 SDNode* MultNode = MultHi.getNode();
385 unsigned MultOpc = MultHi.getOpcode();
387 // MultHi and MultLo must be generated by the same node,
388 if (MultLo.getNode() != MultNode)
391 // and it must be a multiplication.
392 if (MultOpc != ISD::SMUL_LOHI && MultOpc != ISD::UMUL_LOHI)
395 // MultLo amd MultHi must be the first and second output of MultNode
397 if (MultHi.getResNo() != 1 || MultLo.getResNo() != 0)
400 // Transform this to a MSUB only if SUBENode and SUBCNode are the only users
401 // of the values of MultNode, in which case MultNode will be removed in later
403 // If there exist users other than SUBENode or SUBCNode, this function returns
404 // here, which will result in MultNode being mapped to a single MULT
405 // instruction node rather than a pair of MULT and MSUB instructions being
407 if (!MultHi.hasOneUse() || !MultLo.hasOneUse())
410 SDValue Chain = CurDAG->getEntryNode();
411 DebugLoc dl = SUBENode->getDebugLoc();
413 // create MipsSub(u) node
414 MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MSubu : MipsISD::MSub;
416 SDValue MSub = CurDAG->getNode(MultOpc, dl, MVT::Glue,
417 MultNode->getOperand(0),// Factor 0
418 MultNode->getOperand(1),// Factor 1
419 SUBCNode->getOperand(0),// Lo0
420 SUBENode->getOperand(0));// Hi0
422 // create CopyFromReg nodes
423 SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, dl, Mips::LO, MVT::i32,
425 SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), dl,
427 CopyFromLo.getValue(2));
429 // replace uses of sube and subc here
430 if (!SDValue(SUBCNode, 0).use_empty())
431 CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBCNode, 0), CopyFromLo);
433 if (!SDValue(SUBENode, 0).use_empty())
434 CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBENode, 0), CopyFromHi);
439 static SDValue PerformADDECombine(SDNode *N, SelectionDAG& DAG,
440 TargetLowering::DAGCombinerInfo &DCI,
441 const MipsSubtarget* Subtarget) {
442 if (DCI.isBeforeLegalize())
445 if (Subtarget->hasMips32() && N->getValueType(0) == MVT::i32 &&
447 return SDValue(N, 0);
452 static SDValue PerformSUBECombine(SDNode *N, SelectionDAG& DAG,
453 TargetLowering::DAGCombinerInfo &DCI,
454 const MipsSubtarget* Subtarget) {
455 if (DCI.isBeforeLegalize())
458 if (Subtarget->hasMips32() && N->getValueType(0) == MVT::i32 &&
460 return SDValue(N, 0);
465 static SDValue PerformDivRemCombine(SDNode *N, SelectionDAG& DAG,
466 TargetLowering::DAGCombinerInfo &DCI,
467 const MipsSubtarget* Subtarget) {
468 if (DCI.isBeforeLegalizeOps())
471 EVT Ty = N->getValueType(0);
472 unsigned LO = (Ty == MVT::i32) ? Mips::LO : Mips::LO64;
473 unsigned HI = (Ty == MVT::i32) ? Mips::HI : Mips::HI64;
474 unsigned opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem :
476 DebugLoc dl = N->getDebugLoc();
478 SDValue DivRem = DAG.getNode(opc, dl, MVT::Glue,
479 N->getOperand(0), N->getOperand(1));
480 SDValue InChain = DAG.getEntryNode();
481 SDValue InGlue = DivRem;
484 if (N->hasAnyUseOfValue(0)) {
485 SDValue CopyFromLo = DAG.getCopyFromReg(InChain, dl, LO, Ty,
487 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), CopyFromLo);
488 InChain = CopyFromLo.getValue(1);
489 InGlue = CopyFromLo.getValue(2);
493 if (N->hasAnyUseOfValue(1)) {
494 SDValue CopyFromHi = DAG.getCopyFromReg(InChain, dl,
496 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), CopyFromHi);
502 static Mips::CondCode FPCondCCodeToFCC(ISD::CondCode CC) {
504 default: llvm_unreachable("Unknown fp condition code!");
506 case ISD::SETOEQ: return Mips::FCOND_OEQ;
507 case ISD::SETUNE: return Mips::FCOND_UNE;
509 case ISD::SETOLT: return Mips::FCOND_OLT;
511 case ISD::SETOGT: return Mips::FCOND_OGT;
513 case ISD::SETOLE: return Mips::FCOND_OLE;
515 case ISD::SETOGE: return Mips::FCOND_OGE;
516 case ISD::SETULT: return Mips::FCOND_ULT;
517 case ISD::SETULE: return Mips::FCOND_ULE;
518 case ISD::SETUGT: return Mips::FCOND_UGT;
519 case ISD::SETUGE: return Mips::FCOND_UGE;
520 case ISD::SETUO: return Mips::FCOND_UN;
521 case ISD::SETO: return Mips::FCOND_OR;
523 case ISD::SETONE: return Mips::FCOND_ONE;
524 case ISD::SETUEQ: return Mips::FCOND_UEQ;
529 // Returns true if condition code has to be inverted.
530 static bool InvertFPCondCode(Mips::CondCode CC) {
531 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
534 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
535 "Illegal Condition Code");
540 // Creates and returns an FPCmp node from a setcc node.
541 // Returns Op if setcc is not a floating point comparison.
542 static SDValue CreateFPCmp(SelectionDAG& DAG, const SDValue& Op) {
543 // must be a SETCC node
544 if (Op.getOpcode() != ISD::SETCC)
547 SDValue LHS = Op.getOperand(0);
549 if (!LHS.getValueType().isFloatingPoint())
552 SDValue RHS = Op.getOperand(1);
553 DebugLoc dl = Op.getDebugLoc();
555 // Assume the 3rd operand is a CondCodeSDNode. Add code to check the type of
556 // node if necessary.
557 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
559 return DAG.getNode(MipsISD::FPCmp, dl, MVT::Glue, LHS, RHS,
560 DAG.getConstant(FPCondCCodeToFCC(CC), MVT::i32));
563 // Creates and returns a CMovFPT/F node.
564 static SDValue CreateCMovFP(SelectionDAG& DAG, SDValue Cond, SDValue True,
565 SDValue False, DebugLoc DL) {
566 bool invert = InvertFPCondCode((Mips::CondCode)
567 cast<ConstantSDNode>(Cond.getOperand(2))
570 return DAG.getNode((invert ? MipsISD::CMovFP_F : MipsISD::CMovFP_T), DL,
571 True.getValueType(), True, False, Cond);
574 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG& DAG,
575 TargetLowering::DAGCombinerInfo &DCI,
576 const MipsSubtarget* Subtarget) {
577 if (DCI.isBeforeLegalizeOps())
580 SDValue SetCC = N->getOperand(0);
582 if ((SetCC.getOpcode() != ISD::SETCC) ||
583 !SetCC.getOperand(0).getValueType().isInteger())
586 SDValue False = N->getOperand(2);
587 EVT FalseTy = False.getValueType();
589 if (!FalseTy.isInteger())
592 ConstantSDNode *CN = dyn_cast<ConstantSDNode>(False);
594 if (!CN || CN->getZExtValue())
597 const DebugLoc DL = N->getDebugLoc();
598 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
599 SDValue True = N->getOperand(1);
601 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
602 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
604 return DAG.getNode(ISD::SELECT, DL, FalseTy, SetCC, False, True);
607 static SDValue PerformANDCombine(SDNode *N, SelectionDAG& DAG,
608 TargetLowering::DAGCombinerInfo &DCI,
609 const MipsSubtarget* Subtarget) {
610 // Pattern match EXT.
611 // $dst = and ((sra or srl) $src , pos), (2**size - 1)
612 // => ext $dst, $src, size, pos
613 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
616 SDValue ShiftRight = N->getOperand(0), Mask = N->getOperand(1);
617 unsigned ShiftRightOpc = ShiftRight.getOpcode();
619 // Op's first operand must be a shift right.
620 if (ShiftRightOpc != ISD::SRA && ShiftRightOpc != ISD::SRL)
623 // The second operand of the shift must be an immediate.
625 if (!(CN = dyn_cast<ConstantSDNode>(ShiftRight.getOperand(1))))
628 uint64_t Pos = CN->getZExtValue();
629 uint64_t SMPos, SMSize;
631 // Op's second operand must be a shifted mask.
632 if (!(CN = dyn_cast<ConstantSDNode>(Mask)) ||
633 !IsShiftedMask(CN->getZExtValue(), SMPos, SMSize))
636 // Return if the shifted mask does not start at bit 0 or the sum of its size
637 // and Pos exceeds the word's size.
638 EVT ValTy = N->getValueType(0);
639 if (SMPos != 0 || Pos + SMSize > ValTy.getSizeInBits())
642 return DAG.getNode(MipsISD::Ext, N->getDebugLoc(), ValTy,
643 ShiftRight.getOperand(0), DAG.getConstant(Pos, MVT::i32),
644 DAG.getConstant(SMSize, MVT::i32));
647 static SDValue PerformORCombine(SDNode *N, SelectionDAG& DAG,
648 TargetLowering::DAGCombinerInfo &DCI,
649 const MipsSubtarget* Subtarget) {
650 // Pattern match INS.
651 // $dst = or (and $src1 , mask0), (and (shl $src, pos), mask1),
652 // where mask1 = (2**size - 1) << pos, mask0 = ~mask1
653 // => ins $dst, $src, size, pos, $src1
654 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
657 SDValue And0 = N->getOperand(0), And1 = N->getOperand(1);
658 uint64_t SMPos0, SMSize0, SMPos1, SMSize1;
661 // See if Op's first operand matches (and $src1 , mask0).
662 if (And0.getOpcode() != ISD::AND)
665 if (!(CN = dyn_cast<ConstantSDNode>(And0.getOperand(1))) ||
666 !IsShiftedMask(~CN->getSExtValue(), SMPos0, SMSize0))
669 // See if Op's second operand matches (and (shl $src, pos), mask1).
670 if (And1.getOpcode() != ISD::AND)
673 if (!(CN = dyn_cast<ConstantSDNode>(And1.getOperand(1))) ||
674 !IsShiftedMask(CN->getZExtValue(), SMPos1, SMSize1))
677 // The shift masks must have the same position and size.
678 if (SMPos0 != SMPos1 || SMSize0 != SMSize1)
681 SDValue Shl = And1.getOperand(0);
682 if (Shl.getOpcode() != ISD::SHL)
685 if (!(CN = dyn_cast<ConstantSDNode>(Shl.getOperand(1))))
688 unsigned Shamt = CN->getZExtValue();
690 // Return if the shift amount and the first bit position of mask are not the
692 EVT ValTy = N->getValueType(0);
693 if ((Shamt != SMPos0) || (SMPos0 + SMSize0 > ValTy.getSizeInBits()))
696 return DAG.getNode(MipsISD::Ins, N->getDebugLoc(), ValTy, Shl.getOperand(0),
697 DAG.getConstant(SMPos0, MVT::i32),
698 DAG.getConstant(SMSize0, MVT::i32), And0.getOperand(0));
701 SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI)
703 SelectionDAG &DAG = DCI.DAG;
704 unsigned opc = N->getOpcode();
709 return PerformADDECombine(N, DAG, DCI, Subtarget);
711 return PerformSUBECombine(N, DAG, DCI, Subtarget);
714 return PerformDivRemCombine(N, DAG, DCI, Subtarget);
716 return PerformSELECTCombine(N, DAG, DCI, Subtarget);
718 return PerformANDCombine(N, DAG, DCI, Subtarget);
720 return PerformORCombine(N, DAG, DCI, Subtarget);
726 SDValue MipsTargetLowering::
727 LowerOperation(SDValue Op, SelectionDAG &DAG) const
729 switch (Op.getOpcode())
731 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
732 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
733 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
734 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
735 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
736 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
737 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
738 case ISD::SELECT: return LowerSELECT(Op, DAG);
739 case ISD::SETCC: return LowerSETCC(Op, DAG);
740 case ISD::VASTART: return LowerVASTART(Op, DAG);
741 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
742 case ISD::FABS: return LowerFABS(Op, DAG);
743 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
744 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG);
745 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG);
750 //===----------------------------------------------------------------------===//
751 // Lower helper functions
752 //===----------------------------------------------------------------------===//
754 // AddLiveIn - This helper function adds the specified physical register to the
755 // MachineFunction as a live in value. It also creates a corresponding
756 // virtual register for it.
758 AddLiveIn(MachineFunction &MF, unsigned PReg, const TargetRegisterClass *RC)
760 assert(RC->contains(PReg) && "Not the correct regclass!");
761 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
762 MF.getRegInfo().addLiveIn(PReg, VReg);
766 // Get fp branch code (not opcode) from condition code.
767 static Mips::FPBranchCode GetFPBranchCodeFromCond(Mips::CondCode CC) {
768 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
769 return Mips::BRANCH_T;
771 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
772 "Invalid CondCode.");
774 return Mips::BRANCH_F;
778 static MachineBasicBlock* ExpandCondMov(MachineInstr *MI, MachineBasicBlock *BB,
780 const MipsSubtarget* Subtarget,
781 const TargetInstrInfo *TII,
782 bool isFPCmp, unsigned Opc) {
783 // There is no need to expand CMov instructions if target has
784 // conditional moves.
785 if (Subtarget->hasCondMov())
788 // To "insert" a SELECT_CC instruction, we actually have to insert the
789 // diamond control-flow pattern. The incoming instruction knows the
790 // destination vreg to set, the condition code register to branch on, the
791 // true/false values to select between, and a branch opcode to use.
792 const BasicBlock *LLVM_BB = BB->getBasicBlock();
793 MachineFunction::iterator It = BB;
800 // bNE r1, r0, copy1MBB
801 // fallthrough --> copy0MBB
802 MachineBasicBlock *thisMBB = BB;
803 MachineFunction *F = BB->getParent();
804 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
805 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
806 F->insert(It, copy0MBB);
807 F->insert(It, sinkMBB);
809 // Transfer the remainder of BB and its successor edges to sinkMBB.
810 sinkMBB->splice(sinkMBB->begin(), BB,
811 llvm::next(MachineBasicBlock::iterator(MI)),
813 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
815 // Next, add the true and fallthrough blocks as its successors.
816 BB->addSuccessor(copy0MBB);
817 BB->addSuccessor(sinkMBB);
819 // Emit the right instruction according to the type of the operands compared
821 BuildMI(BB, dl, TII->get(Opc)).addMBB(sinkMBB);
823 BuildMI(BB, dl, TII->get(Opc)).addReg(MI->getOperand(2).getReg())
824 .addReg(Mips::ZERO).addMBB(sinkMBB);
828 // # fallthrough to sinkMBB
831 // Update machine-CFG edges
832 BB->addSuccessor(sinkMBB);
835 // %Result = phi [ %TrueValue, thisMBB ], [ %FalseValue, copy0MBB ]
840 BuildMI(*BB, BB->begin(), dl,
841 TII->get(Mips::PHI), MI->getOperand(0).getReg())
842 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB)
843 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB);
845 BuildMI(*BB, BB->begin(), dl,
846 TII->get(Mips::PHI), MI->getOperand(0).getReg())
847 .addReg(MI->getOperand(3).getReg()).addMBB(thisMBB)
848 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB);
850 MI->eraseFromParent(); // The pseudo instruction is gone now.
855 MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
856 MachineBasicBlock *BB) const {
857 switch (MI->getOpcode()) {
858 default: llvm_unreachable("Unexpected instr type to insert");
859 case Mips::ATOMIC_LOAD_ADD_I8:
860 case Mips::ATOMIC_LOAD_ADD_I8_P8:
861 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::ADDu);
862 case Mips::ATOMIC_LOAD_ADD_I16:
863 case Mips::ATOMIC_LOAD_ADD_I16_P8:
864 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::ADDu);
865 case Mips::ATOMIC_LOAD_ADD_I32:
866 case Mips::ATOMIC_LOAD_ADD_I32_P8:
867 return EmitAtomicBinary(MI, BB, 4, Mips::ADDu);
868 case Mips::ATOMIC_LOAD_ADD_I64:
869 case Mips::ATOMIC_LOAD_ADD_I64_P8:
870 return EmitAtomicBinary(MI, BB, 8, Mips::DADDu);
872 case Mips::ATOMIC_LOAD_AND_I8:
873 case Mips::ATOMIC_LOAD_AND_I8_P8:
874 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::AND);
875 case Mips::ATOMIC_LOAD_AND_I16:
876 case Mips::ATOMIC_LOAD_AND_I16_P8:
877 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::AND);
878 case Mips::ATOMIC_LOAD_AND_I32:
879 case Mips::ATOMIC_LOAD_AND_I32_P8:
880 return EmitAtomicBinary(MI, BB, 4, Mips::AND);
881 case Mips::ATOMIC_LOAD_AND_I64:
882 case Mips::ATOMIC_LOAD_AND_I64_P8:
883 return EmitAtomicBinary(MI, BB, 8, Mips::AND64);
885 case Mips::ATOMIC_LOAD_OR_I8:
886 case Mips::ATOMIC_LOAD_OR_I8_P8:
887 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::OR);
888 case Mips::ATOMIC_LOAD_OR_I16:
889 case Mips::ATOMIC_LOAD_OR_I16_P8:
890 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::OR);
891 case Mips::ATOMIC_LOAD_OR_I32:
892 case Mips::ATOMIC_LOAD_OR_I32_P8:
893 return EmitAtomicBinary(MI, BB, 4, Mips::OR);
894 case Mips::ATOMIC_LOAD_OR_I64:
895 case Mips::ATOMIC_LOAD_OR_I64_P8:
896 return EmitAtomicBinary(MI, BB, 8, Mips::OR64);
898 case Mips::ATOMIC_LOAD_XOR_I8:
899 case Mips::ATOMIC_LOAD_XOR_I8_P8:
900 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::XOR);
901 case Mips::ATOMIC_LOAD_XOR_I16:
902 case Mips::ATOMIC_LOAD_XOR_I16_P8:
903 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::XOR);
904 case Mips::ATOMIC_LOAD_XOR_I32:
905 case Mips::ATOMIC_LOAD_XOR_I32_P8:
906 return EmitAtomicBinary(MI, BB, 4, Mips::XOR);
907 case Mips::ATOMIC_LOAD_XOR_I64:
908 case Mips::ATOMIC_LOAD_XOR_I64_P8:
909 return EmitAtomicBinary(MI, BB, 8, Mips::XOR64);
911 case Mips::ATOMIC_LOAD_NAND_I8:
912 case Mips::ATOMIC_LOAD_NAND_I8_P8:
913 return EmitAtomicBinaryPartword(MI, BB, 1, 0, true);
914 case Mips::ATOMIC_LOAD_NAND_I16:
915 case Mips::ATOMIC_LOAD_NAND_I16_P8:
916 return EmitAtomicBinaryPartword(MI, BB, 2, 0, true);
917 case Mips::ATOMIC_LOAD_NAND_I32:
918 case Mips::ATOMIC_LOAD_NAND_I32_P8:
919 return EmitAtomicBinary(MI, BB, 4, 0, true);
920 case Mips::ATOMIC_LOAD_NAND_I64:
921 case Mips::ATOMIC_LOAD_NAND_I64_P8:
922 return EmitAtomicBinary(MI, BB, 8, 0, true);
924 case Mips::ATOMIC_LOAD_SUB_I8:
925 case Mips::ATOMIC_LOAD_SUB_I8_P8:
926 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::SUBu);
927 case Mips::ATOMIC_LOAD_SUB_I16:
928 case Mips::ATOMIC_LOAD_SUB_I16_P8:
929 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::SUBu);
930 case Mips::ATOMIC_LOAD_SUB_I32:
931 case Mips::ATOMIC_LOAD_SUB_I32_P8:
932 return EmitAtomicBinary(MI, BB, 4, Mips::SUBu);
933 case Mips::ATOMIC_LOAD_SUB_I64:
934 case Mips::ATOMIC_LOAD_SUB_I64_P8:
935 return EmitAtomicBinary(MI, BB, 8, Mips::DSUBu);
937 case Mips::ATOMIC_SWAP_I8:
938 case Mips::ATOMIC_SWAP_I8_P8:
939 return EmitAtomicBinaryPartword(MI, BB, 1, 0);
940 case Mips::ATOMIC_SWAP_I16:
941 case Mips::ATOMIC_SWAP_I16_P8:
942 return EmitAtomicBinaryPartword(MI, BB, 2, 0);
943 case Mips::ATOMIC_SWAP_I32:
944 case Mips::ATOMIC_SWAP_I32_P8:
945 return EmitAtomicBinary(MI, BB, 4, 0);
946 case Mips::ATOMIC_SWAP_I64:
947 case Mips::ATOMIC_SWAP_I64_P8:
948 return EmitAtomicBinary(MI, BB, 8, 0);
950 case Mips::ATOMIC_CMP_SWAP_I8:
951 case Mips::ATOMIC_CMP_SWAP_I8_P8:
952 return EmitAtomicCmpSwapPartword(MI, BB, 1);
953 case Mips::ATOMIC_CMP_SWAP_I16:
954 case Mips::ATOMIC_CMP_SWAP_I16_P8:
955 return EmitAtomicCmpSwapPartword(MI, BB, 2);
956 case Mips::ATOMIC_CMP_SWAP_I32:
957 case Mips::ATOMIC_CMP_SWAP_I32_P8:
958 return EmitAtomicCmpSwap(MI, BB, 4);
959 case Mips::ATOMIC_CMP_SWAP_I64:
960 case Mips::ATOMIC_CMP_SWAP_I64_P8:
961 return EmitAtomicCmpSwap(MI, BB, 8);
965 // This function also handles Mips::ATOMIC_SWAP_I32 (when BinOpcode == 0), and
966 // Mips::ATOMIC_LOAD_NAND_I32 (when Nand == true)
968 MipsTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
969 unsigned Size, unsigned BinOpcode,
971 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicBinary.");
973 MachineFunction *MF = BB->getParent();
974 MachineRegisterInfo &RegInfo = MF->getRegInfo();
975 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
976 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
977 DebugLoc dl = MI->getDebugLoc();
978 unsigned LL, SC, AND, NOR, ZERO, BEQ;
981 LL = IsN64 ? Mips::LL_P8 : Mips::LL;
982 SC = IsN64 ? Mips::SC_P8 : Mips::SC;
989 LL = IsN64 ? Mips::LLD_P8 : Mips::LLD;
990 SC = IsN64 ? Mips::SCD_P8 : Mips::SCD;
993 ZERO = Mips::ZERO_64;
997 unsigned OldVal = MI->getOperand(0).getReg();
998 unsigned Ptr = MI->getOperand(1).getReg();
999 unsigned Incr = MI->getOperand(2).getReg();
1001 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1002 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1003 unsigned Success = RegInfo.createVirtualRegister(RC);
1005 // insert new blocks after the current block
1006 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1007 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1008 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1009 MachineFunction::iterator It = BB;
1011 MF->insert(It, loopMBB);
1012 MF->insert(It, exitMBB);
1014 // Transfer the remainder of BB and its successor edges to exitMBB.
1015 exitMBB->splice(exitMBB->begin(), BB,
1016 llvm::next(MachineBasicBlock::iterator(MI)),
1018 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1022 // fallthrough --> loopMBB
1023 BB->addSuccessor(loopMBB);
1024 loopMBB->addSuccessor(loopMBB);
1025 loopMBB->addSuccessor(exitMBB);
1028 // ll oldval, 0(ptr)
1029 // <binop> storeval, oldval, incr
1030 // sc success, storeval, 0(ptr)
1031 // beq success, $0, loopMBB
1033 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(Ptr).addImm(0);
1035 // and andres, oldval, incr
1036 // nor storeval, $0, andres
1037 BuildMI(BB, dl, TII->get(AND), AndRes).addReg(OldVal).addReg(Incr);
1038 BuildMI(BB, dl, TII->get(NOR), StoreVal).addReg(ZERO).addReg(AndRes);
1039 } else if (BinOpcode) {
1040 // <binop> storeval, oldval, incr
1041 BuildMI(BB, dl, TII->get(BinOpcode), StoreVal).addReg(OldVal).addReg(Incr);
1045 BuildMI(BB, dl, TII->get(SC), Success).addReg(StoreVal).addReg(Ptr).addImm(0);
1046 BuildMI(BB, dl, TII->get(BEQ)).addReg(Success).addReg(ZERO).addMBB(loopMBB);
1048 MI->eraseFromParent(); // The instruction is gone now.
1054 MipsTargetLowering::EmitAtomicBinaryPartword(MachineInstr *MI,
1055 MachineBasicBlock *BB,
1056 unsigned Size, unsigned BinOpcode,
1058 assert((Size == 1 || Size == 2) &&
1059 "Unsupported size for EmitAtomicBinaryPartial.");
1061 MachineFunction *MF = BB->getParent();
1062 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1063 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1064 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1065 DebugLoc dl = MI->getDebugLoc();
1066 unsigned LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1067 unsigned SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1069 unsigned Dest = MI->getOperand(0).getReg();
1070 unsigned Ptr = MI->getOperand(1).getReg();
1071 unsigned Incr = MI->getOperand(2).getReg();
1073 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1074 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1075 unsigned Mask = RegInfo.createVirtualRegister(RC);
1076 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1077 unsigned NewVal = RegInfo.createVirtualRegister(RC);
1078 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1079 unsigned Incr2 = RegInfo.createVirtualRegister(RC);
1080 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1081 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1082 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1083 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1084 unsigned BinOpRes = RegInfo.createVirtualRegister(RC);
1085 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1086 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1087 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1088 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1089 unsigned SllRes = RegInfo.createVirtualRegister(RC);
1090 unsigned Success = RegInfo.createVirtualRegister(RC);
1092 // insert new blocks after the current block
1093 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1094 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1095 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1096 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1097 MachineFunction::iterator It = BB;
1099 MF->insert(It, loopMBB);
1100 MF->insert(It, sinkMBB);
1101 MF->insert(It, exitMBB);
1103 // Transfer the remainder of BB and its successor edges to exitMBB.
1104 exitMBB->splice(exitMBB->begin(), BB,
1105 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1106 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1108 BB->addSuccessor(loopMBB);
1109 loopMBB->addSuccessor(loopMBB);
1110 loopMBB->addSuccessor(sinkMBB);
1111 sinkMBB->addSuccessor(exitMBB);
1114 // addiu masklsb2,$0,-4 # 0xfffffffc
1115 // and alignedaddr,ptr,masklsb2
1116 // andi ptrlsb2,ptr,3
1117 // sll shiftamt,ptrlsb2,3
1118 // ori maskupper,$0,255 # 0xff
1119 // sll mask,maskupper,shiftamt
1120 // nor mask2,$0,mask
1121 // sll incr2,incr,shiftamt
1123 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1124 BuildMI(BB, dl, TII->get(Mips::ADDiu), MaskLSB2)
1125 .addReg(Mips::ZERO).addImm(-4);
1126 BuildMI(BB, dl, TII->get(Mips::AND), AlignedAddr)
1127 .addReg(Ptr).addReg(MaskLSB2);
1128 BuildMI(BB, dl, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1129 BuildMI(BB, dl, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1130 BuildMI(BB, dl, TII->get(Mips::ORi), MaskUpper)
1131 .addReg(Mips::ZERO).addImm(MaskImm);
1132 BuildMI(BB, dl, TII->get(Mips::SLLV), Mask)
1133 .addReg(ShiftAmt).addReg(MaskUpper);
1134 BuildMI(BB, dl, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1135 BuildMI(BB, dl, TII->get(Mips::SLLV), Incr2).addReg(ShiftAmt).addReg(Incr);
1137 // atomic.load.binop
1139 // ll oldval,0(alignedaddr)
1140 // binop binopres,oldval,incr2
1141 // and newval,binopres,mask
1142 // and maskedoldval0,oldval,mask2
1143 // or storeval,maskedoldval0,newval
1144 // sc success,storeval,0(alignedaddr)
1145 // beq success,$0,loopMBB
1149 // ll oldval,0(alignedaddr)
1150 // and newval,incr2,mask
1151 // and maskedoldval0,oldval,mask2
1152 // or storeval,maskedoldval0,newval
1153 // sc success,storeval,0(alignedaddr)
1154 // beq success,$0,loopMBB
1157 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(AlignedAddr).addImm(0);
1159 // and andres, oldval, incr2
1160 // nor binopres, $0, andres
1161 // and newval, binopres, mask
1162 BuildMI(BB, dl, TII->get(Mips::AND), AndRes).addReg(OldVal).addReg(Incr2);
1163 BuildMI(BB, dl, TII->get(Mips::NOR), BinOpRes)
1164 .addReg(Mips::ZERO).addReg(AndRes);
1165 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1166 } else if (BinOpcode) {
1167 // <binop> binopres, oldval, incr2
1168 // and newval, binopres, mask
1169 BuildMI(BB, dl, TII->get(BinOpcode), BinOpRes).addReg(OldVal).addReg(Incr2);
1170 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1171 } else {// atomic.swap
1172 // and newval, incr2, mask
1173 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(Incr2).addReg(Mask);
1176 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal0)
1177 .addReg(OldVal).addReg(Mask2);
1178 BuildMI(BB, dl, TII->get(Mips::OR), StoreVal)
1179 .addReg(MaskedOldVal0).addReg(NewVal);
1180 BuildMI(BB, dl, TII->get(SC), Success)
1181 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1182 BuildMI(BB, dl, TII->get(Mips::BEQ))
1183 .addReg(Success).addReg(Mips::ZERO).addMBB(loopMBB);
1186 // and maskedoldval1,oldval,mask
1187 // srl srlres,maskedoldval1,shiftamt
1188 // sll sllres,srlres,24
1189 // sra dest,sllres,24
1191 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1193 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal1)
1194 .addReg(OldVal).addReg(Mask);
1195 BuildMI(BB, dl, TII->get(Mips::SRLV), SrlRes)
1196 .addReg(ShiftAmt).addReg(MaskedOldVal1);
1197 BuildMI(BB, dl, TII->get(Mips::SLL), SllRes)
1198 .addReg(SrlRes).addImm(ShiftImm);
1199 BuildMI(BB, dl, TII->get(Mips::SRA), Dest)
1200 .addReg(SllRes).addImm(ShiftImm);
1202 MI->eraseFromParent(); // The instruction is gone now.
1208 MipsTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
1209 MachineBasicBlock *BB,
1210 unsigned Size) const {
1211 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicCmpSwap.");
1213 MachineFunction *MF = BB->getParent();
1214 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1215 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
1216 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1217 DebugLoc dl = MI->getDebugLoc();
1218 unsigned LL, SC, ZERO, BNE, BEQ;
1221 LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1222 SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1228 LL = IsN64 ? Mips::LLD_P8 : Mips::LLD;
1229 SC = IsN64 ? Mips::SCD_P8 : Mips::SCD;
1230 ZERO = Mips::ZERO_64;
1235 unsigned Dest = MI->getOperand(0).getReg();
1236 unsigned Ptr = MI->getOperand(1).getReg();
1237 unsigned OldVal = MI->getOperand(2).getReg();
1238 unsigned NewVal = MI->getOperand(3).getReg();
1240 unsigned Success = RegInfo.createVirtualRegister(RC);
1242 // insert new blocks after the current block
1243 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1244 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1245 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1246 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1247 MachineFunction::iterator It = BB;
1249 MF->insert(It, loop1MBB);
1250 MF->insert(It, loop2MBB);
1251 MF->insert(It, exitMBB);
1253 // Transfer the remainder of BB and its successor edges to exitMBB.
1254 exitMBB->splice(exitMBB->begin(), BB,
1255 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1256 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1260 // fallthrough --> loop1MBB
1261 BB->addSuccessor(loop1MBB);
1262 loop1MBB->addSuccessor(exitMBB);
1263 loop1MBB->addSuccessor(loop2MBB);
1264 loop2MBB->addSuccessor(loop1MBB);
1265 loop2MBB->addSuccessor(exitMBB);
1269 // bne dest, oldval, exitMBB
1271 BuildMI(BB, dl, TII->get(LL), Dest).addReg(Ptr).addImm(0);
1272 BuildMI(BB, dl, TII->get(BNE))
1273 .addReg(Dest).addReg(OldVal).addMBB(exitMBB);
1276 // sc success, newval, 0(ptr)
1277 // beq success, $0, loop1MBB
1279 BuildMI(BB, dl, TII->get(SC), Success)
1280 .addReg(NewVal).addReg(Ptr).addImm(0);
1281 BuildMI(BB, dl, TII->get(BEQ))
1282 .addReg(Success).addReg(ZERO).addMBB(loop1MBB);
1284 MI->eraseFromParent(); // The instruction is gone now.
1290 MipsTargetLowering::EmitAtomicCmpSwapPartword(MachineInstr *MI,
1291 MachineBasicBlock *BB,
1292 unsigned Size) const {
1293 assert((Size == 1 || Size == 2) &&
1294 "Unsupported size for EmitAtomicCmpSwapPartial.");
1296 MachineFunction *MF = BB->getParent();
1297 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1298 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1299 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1300 DebugLoc dl = MI->getDebugLoc();
1301 unsigned LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1302 unsigned SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1304 unsigned Dest = MI->getOperand(0).getReg();
1305 unsigned Ptr = MI->getOperand(1).getReg();
1306 unsigned CmpVal = MI->getOperand(2).getReg();
1307 unsigned NewVal = MI->getOperand(3).getReg();
1309 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1310 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1311 unsigned Mask = RegInfo.createVirtualRegister(RC);
1312 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1313 unsigned ShiftedCmpVal = RegInfo.createVirtualRegister(RC);
1314 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1315 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1316 unsigned ShiftedNewVal = RegInfo.createVirtualRegister(RC);
1317 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1318 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1319 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1320 unsigned MaskedCmpVal = RegInfo.createVirtualRegister(RC);
1321 unsigned MaskedNewVal = RegInfo.createVirtualRegister(RC);
1322 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1323 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1324 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1325 unsigned SllRes = RegInfo.createVirtualRegister(RC);
1326 unsigned Success = RegInfo.createVirtualRegister(RC);
1328 // insert new blocks after the current block
1329 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1330 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1331 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1332 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1333 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1334 MachineFunction::iterator It = BB;
1336 MF->insert(It, loop1MBB);
1337 MF->insert(It, loop2MBB);
1338 MF->insert(It, sinkMBB);
1339 MF->insert(It, exitMBB);
1341 // Transfer the remainder of BB and its successor edges to exitMBB.
1342 exitMBB->splice(exitMBB->begin(), BB,
1343 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1344 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1346 BB->addSuccessor(loop1MBB);
1347 loop1MBB->addSuccessor(sinkMBB);
1348 loop1MBB->addSuccessor(loop2MBB);
1349 loop2MBB->addSuccessor(loop1MBB);
1350 loop2MBB->addSuccessor(sinkMBB);
1351 sinkMBB->addSuccessor(exitMBB);
1353 // FIXME: computation of newval2 can be moved to loop2MBB.
1355 // addiu masklsb2,$0,-4 # 0xfffffffc
1356 // and alignedaddr,ptr,masklsb2
1357 // andi ptrlsb2,ptr,3
1358 // sll shiftamt,ptrlsb2,3
1359 // ori maskupper,$0,255 # 0xff
1360 // sll mask,maskupper,shiftamt
1361 // nor mask2,$0,mask
1362 // andi maskedcmpval,cmpval,255
1363 // sll shiftedcmpval,maskedcmpval,shiftamt
1364 // andi maskednewval,newval,255
1365 // sll shiftednewval,maskednewval,shiftamt
1366 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1367 BuildMI(BB, dl, TII->get(Mips::ADDiu), MaskLSB2)
1368 .addReg(Mips::ZERO).addImm(-4);
1369 BuildMI(BB, dl, TII->get(Mips::AND), AlignedAddr)
1370 .addReg(Ptr).addReg(MaskLSB2);
1371 BuildMI(BB, dl, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1372 BuildMI(BB, dl, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1373 BuildMI(BB, dl, TII->get(Mips::ORi), MaskUpper)
1374 .addReg(Mips::ZERO).addImm(MaskImm);
1375 BuildMI(BB, dl, TII->get(Mips::SLLV), Mask)
1376 .addReg(ShiftAmt).addReg(MaskUpper);
1377 BuildMI(BB, dl, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1378 BuildMI(BB, dl, TII->get(Mips::ANDi), MaskedCmpVal)
1379 .addReg(CmpVal).addImm(MaskImm);
1380 BuildMI(BB, dl, TII->get(Mips::SLLV), ShiftedCmpVal)
1381 .addReg(ShiftAmt).addReg(MaskedCmpVal);
1382 BuildMI(BB, dl, TII->get(Mips::ANDi), MaskedNewVal)
1383 .addReg(NewVal).addImm(MaskImm);
1384 BuildMI(BB, dl, TII->get(Mips::SLLV), ShiftedNewVal)
1385 .addReg(ShiftAmt).addReg(MaskedNewVal);
1388 // ll oldval,0(alginedaddr)
1389 // and maskedoldval0,oldval,mask
1390 // bne maskedoldval0,shiftedcmpval,sinkMBB
1392 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(AlignedAddr).addImm(0);
1393 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal0)
1394 .addReg(OldVal).addReg(Mask);
1395 BuildMI(BB, dl, TII->get(Mips::BNE))
1396 .addReg(MaskedOldVal0).addReg(ShiftedCmpVal).addMBB(sinkMBB);
1399 // and maskedoldval1,oldval,mask2
1400 // or storeval,maskedoldval1,shiftednewval
1401 // sc success,storeval,0(alignedaddr)
1402 // beq success,$0,loop1MBB
1404 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal1)
1405 .addReg(OldVal).addReg(Mask2);
1406 BuildMI(BB, dl, TII->get(Mips::OR), StoreVal)
1407 .addReg(MaskedOldVal1).addReg(ShiftedNewVal);
1408 BuildMI(BB, dl, TII->get(SC), Success)
1409 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1410 BuildMI(BB, dl, TII->get(Mips::BEQ))
1411 .addReg(Success).addReg(Mips::ZERO).addMBB(loop1MBB);
1414 // srl srlres,maskedoldval0,shiftamt
1415 // sll sllres,srlres,24
1416 // sra dest,sllres,24
1418 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1420 BuildMI(BB, dl, TII->get(Mips::SRLV), SrlRes)
1421 .addReg(ShiftAmt).addReg(MaskedOldVal0);
1422 BuildMI(BB, dl, TII->get(Mips::SLL), SllRes)
1423 .addReg(SrlRes).addImm(ShiftImm);
1424 BuildMI(BB, dl, TII->get(Mips::SRA), Dest)
1425 .addReg(SllRes).addImm(ShiftImm);
1427 MI->eraseFromParent(); // The instruction is gone now.
1432 //===----------------------------------------------------------------------===//
1433 // Misc Lower Operation implementation
1434 //===----------------------------------------------------------------------===//
1435 SDValue MipsTargetLowering::
1436 LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const
1438 MachineFunction &MF = DAG.getMachineFunction();
1439 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
1440 unsigned SP = IsN64 ? Mips::SP_64 : Mips::SP;
1442 assert(getTargetMachine().getFrameLowering()->getStackAlignment() >=
1443 cast<ConstantSDNode>(Op.getOperand(2).getNode())->getZExtValue() &&
1444 "Cannot lower if the alignment of the allocated space is larger than \
1445 that of the stack.");
1447 SDValue Chain = Op.getOperand(0);
1448 SDValue Size = Op.getOperand(1);
1449 DebugLoc dl = Op.getDebugLoc();
1451 // Get a reference from Mips stack pointer
1452 SDValue StackPointer = DAG.getCopyFromReg(Chain, dl, SP, getPointerTy());
1454 // Subtract the dynamic size from the actual stack size to
1455 // obtain the new stack size.
1456 SDValue Sub = DAG.getNode(ISD::SUB, dl, getPointerTy(), StackPointer, Size);
1458 // The Sub result contains the new stack start address, so it
1459 // must be placed in the stack pointer register.
1460 Chain = DAG.getCopyToReg(StackPointer.getValue(1), dl, SP, Sub, SDValue());
1462 // This node always has two return values: a new stack pointer
1463 // value and a chain
1464 SDVTList VTLs = DAG.getVTList(getPointerTy(), MVT::Other);
1465 SDValue Ptr = DAG.getFrameIndex(MipsFI->getDynAllocFI(), getPointerTy());
1466 SDValue Ops[] = { Chain, Ptr, Chain.getValue(1) };
1468 return DAG.getNode(MipsISD::DynAlloc, dl, VTLs, Ops, 3);
1471 SDValue MipsTargetLowering::
1472 LowerBRCOND(SDValue Op, SelectionDAG &DAG) const
1474 // The first operand is the chain, the second is the condition, the third is
1475 // the block to branch to if the condition is true.
1476 SDValue Chain = Op.getOperand(0);
1477 SDValue Dest = Op.getOperand(2);
1478 DebugLoc dl = Op.getDebugLoc();
1480 SDValue CondRes = CreateFPCmp(DAG, Op.getOperand(1));
1482 // Return if flag is not set by a floating point comparison.
1483 if (CondRes.getOpcode() != MipsISD::FPCmp)
1486 SDValue CCNode = CondRes.getOperand(2);
1488 (Mips::CondCode)cast<ConstantSDNode>(CCNode)->getZExtValue();
1489 SDValue BrCode = DAG.getConstant(GetFPBranchCodeFromCond(CC), MVT::i32);
1491 return DAG.getNode(MipsISD::FPBrcond, dl, Op.getValueType(), Chain, BrCode,
1495 SDValue MipsTargetLowering::
1496 LowerSELECT(SDValue Op, SelectionDAG &DAG) const
1498 SDValue Cond = CreateFPCmp(DAG, Op.getOperand(0));
1500 // Return if flag is not set by a floating point comparison.
1501 if (Cond.getOpcode() != MipsISD::FPCmp)
1504 return CreateCMovFP(DAG, Cond, Op.getOperand(1), Op.getOperand(2),
1508 SDValue MipsTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1509 SDValue Cond = CreateFPCmp(DAG, Op);
1511 assert(Cond.getOpcode() == MipsISD::FPCmp &&
1512 "Floating point operand expected.");
1514 SDValue True = DAG.getConstant(1, MVT::i32);
1515 SDValue False = DAG.getConstant(0, MVT::i32);
1517 return CreateCMovFP(DAG, Cond, True, False, Op.getDebugLoc());
1520 SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
1521 SelectionDAG &DAG) const {
1522 // FIXME there isn't actually debug info here
1523 DebugLoc dl = Op.getDebugLoc();
1524 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
1526 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1527 SDVTList VTs = DAG.getVTList(MVT::i32);
1529 MipsTargetObjectFile &TLOF = (MipsTargetObjectFile&)getObjFileLowering();
1531 // %gp_rel relocation
1532 if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
1533 SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1535 SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, dl, VTs, &GA, 1);
1536 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1537 return DAG.getNode(ISD::ADD, dl, MVT::i32, GOT, GPRelNode);
1539 // %hi/%lo relocation
1540 SDValue GAHi = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1542 SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1544 SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, VTs, &GAHi, 1);
1545 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, GALo);
1546 return DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
1549 EVT ValTy = Op.getValueType();
1550 bool HasGotOfst = (GV->hasInternalLinkage() ||
1551 (GV->hasLocalLinkage() && !isa<Function>(GV)));
1552 unsigned GotFlag = HasMips64 ?
1553 (HasGotOfst ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT_DISP) :
1554 (HasGotOfst ? MipsII::MO_GOT : MipsII::MO_GOT16);
1555 SDValue GA = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0, GotFlag);
1556 GA = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), GA);
1557 SDValue ResNode = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), GA,
1558 MachinePointerInfo(), false, false, false, 0);
1559 // On functions and global targets not internal linked only
1560 // a load from got/GP is necessary for PIC to work.
1563 SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0,
1564 HasMips64 ? MipsII::MO_GOT_OFST :
1566 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, GALo);
1567 return DAG.getNode(ISD::ADD, dl, ValTy, ResNode, Lo);
1570 SDValue MipsTargetLowering::LowerBlockAddress(SDValue Op,
1571 SelectionDAG &DAG) const {
1572 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
1573 // FIXME there isn't actually debug info here
1574 DebugLoc dl = Op.getDebugLoc();
1576 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1577 // %hi/%lo relocation
1578 SDValue BAHi = DAG.getBlockAddress(BA, MVT::i32, true, MipsII::MO_ABS_HI);
1579 SDValue BALo = DAG.getBlockAddress(BA, MVT::i32, true, MipsII::MO_ABS_LO);
1580 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, MVT::i32, BAHi);
1581 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, BALo);
1582 return DAG.getNode(ISD::ADD, dl, MVT::i32, Hi, Lo);
1585 EVT ValTy = Op.getValueType();
1586 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1587 unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1588 SDValue BAGOTOffset = DAG.getBlockAddress(BA, ValTy, true, GOTFlag);
1589 BAGOTOffset = DAG.getNode(MipsISD::Wrapper, dl, ValTy,
1590 GetGlobalReg(DAG, ValTy), BAGOTOffset);
1591 SDValue BALOOffset = DAG.getBlockAddress(BA, ValTy, true, OFSTFlag);
1592 SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), BAGOTOffset,
1593 MachinePointerInfo(), false, false, false, 0);
1594 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, BALOOffset);
1595 return DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
1598 SDValue MipsTargetLowering::
1599 LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
1601 // If the relocation model is PIC, use the General Dynamic TLS Model or
1602 // Local Dynamic TLS model, otherwise use the Initial Exec or
1603 // Local Exec TLS Model.
1605 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1606 DebugLoc dl = GA->getDebugLoc();
1607 const GlobalValue *GV = GA->getGlobal();
1608 EVT PtrVT = getPointerTy();
1610 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
1611 // General Dynamic TLS Model
1612 bool LocalDynamic = GV->hasInternalLinkage();
1613 unsigned Flag = LocalDynamic ? MipsII::MO_TLSLDM :MipsII::MO_TLSGD;
1614 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, Flag);
1615 SDValue Argument = DAG.getNode(MipsISD::Wrapper, dl, PtrVT,
1616 GetGlobalReg(DAG, PtrVT), TGA);
1617 unsigned PtrSize = PtrVT.getSizeInBits();
1618 IntegerType *PtrTy = Type::getIntNTy(*DAG.getContext(), PtrSize);
1620 SDValue TlsGetAddr = DAG.getExternalSymbol("__tls_get_addr", PtrVT);
1624 Entry.Node = Argument;
1626 Args.push_back(Entry);
1628 std::pair<SDValue, SDValue> CallResult =
1629 LowerCallTo(DAG.getEntryNode(), PtrTy,
1630 false, false, false, false, 0, CallingConv::C,
1631 /*isTailCall=*/false, /*doesNotRet=*/false,
1632 /*isReturnValueUsed=*/true,
1633 TlsGetAddr, Args, DAG, dl);
1635 SDValue Ret = CallResult.first;
1640 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1641 MipsII::MO_DTPREL_HI);
1642 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, PtrVT, TGAHi);
1643 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1644 MipsII::MO_DTPREL_LO);
1645 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, TGALo);
1646 SDValue Add = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Ret);
1647 return DAG.getNode(ISD::ADD, dl, PtrVT, Add, Lo);
1651 if (GV->isDeclaration()) {
1652 // Initial Exec TLS Model
1653 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1654 MipsII::MO_GOTTPREL);
1655 TGA = DAG.getNode(MipsISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
1657 Offset = DAG.getLoad(PtrVT, dl,
1658 DAG.getEntryNode(), TGA, MachinePointerInfo(),
1659 false, false, false, 0);
1661 // Local Exec TLS Model
1662 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1663 MipsII::MO_TPREL_HI);
1664 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1665 MipsII::MO_TPREL_LO);
1666 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, PtrVT, TGAHi);
1667 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, TGALo);
1668 Offset = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
1671 SDValue ThreadPointer = DAG.getNode(MipsISD::ThreadPointer, dl, PtrVT);
1672 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
1675 SDValue MipsTargetLowering::
1676 LowerJumpTable(SDValue Op, SelectionDAG &DAG) const
1678 SDValue HiPart, JTI, JTILo;
1679 // FIXME there isn't actually debug info here
1680 DebugLoc dl = Op.getDebugLoc();
1681 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
1682 EVT PtrVT = Op.getValueType();
1683 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
1685 if (!IsPIC && !IsN64) {
1686 JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_HI);
1687 HiPart = DAG.getNode(MipsISD::Hi, dl, PtrVT, JTI);
1688 JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_LO);
1689 } else {// Emit Load from Global Pointer
1690 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1691 unsigned OfstFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1692 JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, GOTFlag);
1693 JTI = DAG.getNode(MipsISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
1695 HiPart = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), JTI,
1696 MachinePointerInfo(), false, false, false, 0);
1697 JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, OfstFlag);
1700 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, JTILo);
1701 return DAG.getNode(ISD::ADD, dl, PtrVT, HiPart, Lo);
1704 SDValue MipsTargetLowering::
1705 LowerConstantPool(SDValue Op, SelectionDAG &DAG) const
1708 ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
1709 const Constant *C = N->getConstVal();
1710 // FIXME there isn't actually debug info here
1711 DebugLoc dl = Op.getDebugLoc();
1713 // gp_rel relocation
1714 // FIXME: we should reference the constant pool using small data sections,
1715 // but the asm printer currently doesn't support this feature without
1716 // hacking it. This feature should come soon so we can uncomment the
1718 //if (IsInSmallSection(C->getType())) {
1719 // SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, MVT::i32, CP);
1720 // SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1721 // ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
1723 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1724 SDValue CPHi = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
1725 N->getOffset(), MipsII::MO_ABS_HI);
1726 SDValue CPLo = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
1727 N->getOffset(), MipsII::MO_ABS_LO);
1728 SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, MVT::i32, CPHi);
1729 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, CPLo);
1730 ResNode = DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
1732 EVT ValTy = Op.getValueType();
1733 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1734 unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1735 SDValue CP = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
1736 N->getOffset(), GOTFlag);
1737 CP = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), CP);
1738 SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), CP,
1739 MachinePointerInfo::getConstantPool(), false,
1741 SDValue CPLo = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
1742 N->getOffset(), OFSTFlag);
1743 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, CPLo);
1744 ResNode = DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
1750 SDValue MipsTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
1751 MachineFunction &MF = DAG.getMachineFunction();
1752 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
1754 DebugLoc dl = Op.getDebugLoc();
1755 SDValue FI = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
1758 // vastart just stores the address of the VarArgsFrameIndex slot into the
1759 // memory location argument.
1760 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1761 return DAG.getStore(Op.getOperand(0), dl, FI, Op.getOperand(1),
1762 MachinePointerInfo(SV), false, false, 0);
1765 static SDValue LowerFCOPYSIGN32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1766 EVT TyX = Op.getOperand(0).getValueType();
1767 EVT TyY = Op.getOperand(1).getValueType();
1768 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1769 SDValue Const31 = DAG.getConstant(31, MVT::i32);
1770 DebugLoc DL = Op.getDebugLoc();
1773 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1775 SDValue X = (TyX == MVT::f32) ?
1776 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1777 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1779 SDValue Y = (TyY == MVT::f32) ?
1780 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(1)) :
1781 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(1),
1785 // ext E, Y, 31, 1 ; extract bit31 of Y
1786 // ins X, E, 31, 1 ; insert extracted bit at bit31 of X
1787 SDValue E = DAG.getNode(MipsISD::Ext, DL, MVT::i32, Y, Const31, Const1);
1788 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32, E, Const31, Const1, X);
1791 // srl SrlX, SllX, 1
1793 // sll SllY, SrlX, 31
1794 // or Or, SrlX, SllY
1795 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1796 SDValue SrlX = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1797 SDValue SrlY = DAG.getNode(ISD::SRL, DL, MVT::i32, Y, Const31);
1798 SDValue SllY = DAG.getNode(ISD::SHL, DL, MVT::i32, SrlY, Const31);
1799 Res = DAG.getNode(ISD::OR, DL, MVT::i32, SrlX, SllY);
1802 if (TyX == MVT::f32)
1803 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Res);
1805 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1806 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1807 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1810 static SDValue LowerFCOPYSIGN64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1811 unsigned WidthX = Op.getOperand(0).getValueSizeInBits();
1812 unsigned WidthY = Op.getOperand(1).getValueSizeInBits();
1813 EVT TyX = MVT::getIntegerVT(WidthX), TyY = MVT::getIntegerVT(WidthY);
1814 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1815 DebugLoc DL = Op.getDebugLoc();
1817 // Bitcast to integer nodes.
1818 SDValue X = DAG.getNode(ISD::BITCAST, DL, TyX, Op.getOperand(0));
1819 SDValue Y = DAG.getNode(ISD::BITCAST, DL, TyY, Op.getOperand(1));
1822 // ext E, Y, width(Y) - 1, 1 ; extract bit width(Y)-1 of Y
1823 // ins X, E, width(X) - 1, 1 ; insert extracted bit at bit width(X)-1 of X
1824 SDValue E = DAG.getNode(MipsISD::Ext, DL, TyY, Y,
1825 DAG.getConstant(WidthY - 1, MVT::i32), Const1);
1827 if (WidthX > WidthY)
1828 E = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, E);
1829 else if (WidthY > WidthX)
1830 E = DAG.getNode(ISD::TRUNCATE, DL, TyX, E);
1832 SDValue I = DAG.getNode(MipsISD::Ins, DL, TyX, E,
1833 DAG.getConstant(WidthX - 1, MVT::i32), Const1, X);
1834 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), I);
1837 // (d)sll SllX, X, 1
1838 // (d)srl SrlX, SllX, 1
1839 // (d)srl SrlY, Y, width(Y)-1
1840 // (d)sll SllY, SrlX, width(Y)-1
1841 // or Or, SrlX, SllY
1842 SDValue SllX = DAG.getNode(ISD::SHL, DL, TyX, X, Const1);
1843 SDValue SrlX = DAG.getNode(ISD::SRL, DL, TyX, SllX, Const1);
1844 SDValue SrlY = DAG.getNode(ISD::SRL, DL, TyY, Y,
1845 DAG.getConstant(WidthY - 1, MVT::i32));
1847 if (WidthX > WidthY)
1848 SrlY = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, SrlY);
1849 else if (WidthY > WidthX)
1850 SrlY = DAG.getNode(ISD::TRUNCATE, DL, TyX, SrlY);
1852 SDValue SllY = DAG.getNode(ISD::SHL, DL, TyX, SrlY,
1853 DAG.getConstant(WidthX - 1, MVT::i32));
1854 SDValue Or = DAG.getNode(ISD::OR, DL, TyX, SrlX, SllY);
1855 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Or);
1859 MipsTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
1860 if (Subtarget->hasMips64())
1861 return LowerFCOPYSIGN64(Op, DAG, Subtarget->hasMips32r2());
1863 return LowerFCOPYSIGN32(Op, DAG, Subtarget->hasMips32r2());
1866 static SDValue LowerFABS32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1867 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
1868 DebugLoc DL = Op.getDebugLoc();
1870 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1872 SDValue X = (Op.getValueType() == MVT::f32) ?
1873 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1874 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1879 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32,
1880 DAG.getRegister(Mips::ZERO, MVT::i32),
1881 DAG.getConstant(31, MVT::i32), Const1, X);
1883 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1884 Res = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1887 if (Op.getValueType() == MVT::f32)
1888 return DAG.getNode(ISD::BITCAST, DL, MVT::f32, Res);
1890 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1891 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1892 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1895 static SDValue LowerFABS64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1896 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
1897 DebugLoc DL = Op.getDebugLoc();
1899 // Bitcast to integer node.
1900 SDValue X = DAG.getNode(ISD::BITCAST, DL, MVT::i64, Op.getOperand(0));
1904 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i64,
1905 DAG.getRegister(Mips::ZERO_64, MVT::i64),
1906 DAG.getConstant(63, MVT::i32), Const1, X);
1908 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i64, X, Const1);
1909 Res = DAG.getNode(ISD::SRL, DL, MVT::i64, SllX, Const1);
1912 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, Res);
1916 MipsTargetLowering::LowerFABS(SDValue Op, SelectionDAG &DAG) const {
1917 if (Subtarget->hasMips64() && (Op.getValueType() == MVT::f64))
1918 return LowerFABS64(Op, DAG, Subtarget->hasMips32r2());
1920 return LowerFABS32(Op, DAG, Subtarget->hasMips32r2());
1923 SDValue MipsTargetLowering::
1924 LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
1926 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1927 "Frame address can only be determined for current frame.");
1929 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
1930 MFI->setFrameAddressIsTaken(true);
1931 EVT VT = Op.getValueType();
1932 DebugLoc dl = Op.getDebugLoc();
1933 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
1934 IsN64 ? Mips::FP_64 : Mips::FP, VT);
1938 // TODO: set SType according to the desired memory barrier behavior.
1940 MipsTargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG& DAG) const {
1942 DebugLoc dl = Op.getDebugLoc();
1943 return DAG.getNode(MipsISD::Sync, dl, MVT::Other, Op.getOperand(0),
1944 DAG.getConstant(SType, MVT::i32));
1947 SDValue MipsTargetLowering::LowerATOMIC_FENCE(SDValue Op,
1948 SelectionDAG& DAG) const {
1949 // FIXME: Need pseudo-fence for 'singlethread' fences
1950 // FIXME: Set SType for weaker fences where supported/appropriate.
1952 DebugLoc dl = Op.getDebugLoc();
1953 return DAG.getNode(MipsISD::Sync, dl, MVT::Other, Op.getOperand(0),
1954 DAG.getConstant(SType, MVT::i32));
1957 //===----------------------------------------------------------------------===//
1958 // Calling Convention Implementation
1959 //===----------------------------------------------------------------------===//
1961 //===----------------------------------------------------------------------===//
1962 // TODO: Implement a generic logic using tblgen that can support this.
1963 // Mips O32 ABI rules:
1965 // i32 - Passed in A0, A1, A2, A3 and stack
1966 // f32 - Only passed in f32 registers if no int reg has been used yet to hold
1967 // an argument. Otherwise, passed in A1, A2, A3 and stack.
1968 // f64 - Only passed in two aliased f32 registers if no int reg has been used
1969 // yet to hold an argument. Otherwise, use A2, A3 and stack. If A1 is
1970 // not used, it must be shadowed. If only A3 is avaiable, shadow it and
1973 // For vararg functions, all arguments are passed in A0, A1, A2, A3 and stack.
1974 //===----------------------------------------------------------------------===//
1976 static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
1977 MVT LocVT, CCValAssign::LocInfo LocInfo,
1978 ISD::ArgFlagsTy ArgFlags, CCState &State) {
1980 static const unsigned IntRegsSize=4, FloatRegsSize=2;
1982 static const uint16_t IntRegs[] = {
1983 Mips::A0, Mips::A1, Mips::A2, Mips::A3
1985 static const uint16_t F32Regs[] = {
1986 Mips::F12, Mips::F14
1988 static const uint16_t F64Regs[] = {
1993 if (ArgFlags.isByVal()) {
1994 State.HandleByVal(ValNo, ValVT, LocVT, LocInfo,
1995 1 /*MinSize*/, 4 /*MinAlign*/, ArgFlags);
1996 unsigned NextReg = (State.getNextStackOffset() + 3) / 4;
1997 for (unsigned r = State.getFirstUnallocated(IntRegs, IntRegsSize);
1998 r < std::min(IntRegsSize, NextReg); ++r)
1999 State.AllocateReg(IntRegs[r]);
2003 // Promote i8 and i16
2004 if (LocVT == MVT::i8 || LocVT == MVT::i16) {
2006 if (ArgFlags.isSExt())
2007 LocInfo = CCValAssign::SExt;
2008 else if (ArgFlags.isZExt())
2009 LocInfo = CCValAssign::ZExt;
2011 LocInfo = CCValAssign::AExt;
2016 // f32 and f64 are allocated in A0, A1, A2, A3 when either of the following
2017 // is true: function is vararg, argument is 3rd or higher, there is previous
2018 // argument which is not f32 or f64.
2019 bool AllocateFloatsInIntReg = State.isVarArg() || ValNo > 1
2020 || State.getFirstUnallocated(F32Regs, FloatRegsSize) != ValNo;
2021 unsigned OrigAlign = ArgFlags.getOrigAlign();
2022 bool isI64 = (ValVT == MVT::i32 && OrigAlign == 8);
2024 if (ValVT == MVT::i32 || (ValVT == MVT::f32 && AllocateFloatsInIntReg)) {
2025 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2026 // If this is the first part of an i64 arg,
2027 // the allocated register must be either A0 or A2.
2028 if (isI64 && (Reg == Mips::A1 || Reg == Mips::A3))
2029 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2031 } else if (ValVT == MVT::f64 && AllocateFloatsInIntReg) {
2032 // Allocate int register and shadow next int register. If first
2033 // available register is Mips::A1 or Mips::A3, shadow it too.
2034 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2035 if (Reg == Mips::A1 || Reg == Mips::A3)
2036 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2037 State.AllocateReg(IntRegs, IntRegsSize);
2039 } else if (ValVT.isFloatingPoint() && !AllocateFloatsInIntReg) {
2040 // we are guaranteed to find an available float register
2041 if (ValVT == MVT::f32) {
2042 Reg = State.AllocateReg(F32Regs, FloatRegsSize);
2043 // Shadow int register
2044 State.AllocateReg(IntRegs, IntRegsSize);
2046 Reg = State.AllocateReg(F64Regs, FloatRegsSize);
2047 // Shadow int registers
2048 unsigned Reg2 = State.AllocateReg(IntRegs, IntRegsSize);
2049 if (Reg2 == Mips::A1 || Reg2 == Mips::A3)
2050 State.AllocateReg(IntRegs, IntRegsSize);
2051 State.AllocateReg(IntRegs, IntRegsSize);
2054 llvm_unreachable("Cannot handle this ValVT.");
2056 unsigned SizeInBytes = ValVT.getSizeInBits() >> 3;
2057 unsigned Offset = State.AllocateStack(SizeInBytes, OrigAlign);
2060 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2062 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
2064 return false; // CC must always match
2067 static const uint16_t Mips64IntRegs[8] =
2068 {Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
2069 Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64};
2070 static const uint16_t Mips64DPRegs[8] =
2071 {Mips::D12_64, Mips::D13_64, Mips::D14_64, Mips::D15_64,
2072 Mips::D16_64, Mips::D17_64, Mips::D18_64, Mips::D19_64};
2074 static bool CC_Mips64Byval(unsigned ValNo, MVT ValVT, MVT LocVT,
2075 CCValAssign::LocInfo LocInfo,
2076 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2077 unsigned Align = std::max(ArgFlags.getByValAlign(), (unsigned)8);
2078 unsigned Size = (ArgFlags.getByValSize() + 7) / 8 * 8;
2079 unsigned FirstIdx = State.getFirstUnallocated(Mips64IntRegs, 8);
2081 assert(Align <= 16 && "Cannot handle alignments larger than 16.");
2083 // If byval is 16-byte aligned, the first arg register must be even.
2084 if ((Align == 16) && (FirstIdx % 2)) {
2085 State.AllocateReg(Mips64IntRegs[FirstIdx], Mips64DPRegs[FirstIdx]);
2089 // Mark the registers allocated.
2090 for (unsigned I = FirstIdx; Size && (I < 8); Size -= 8, ++I)
2091 State.AllocateReg(Mips64IntRegs[I], Mips64DPRegs[I]);
2093 // Allocate space on caller's stack.
2094 unsigned Offset = State.AllocateStack(Size, Align);
2097 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Mips64IntRegs[FirstIdx],
2100 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2105 #include "MipsGenCallingConv.inc"
2108 AnalyzeMips64CallOperands(CCState &CCInfo,
2109 const SmallVectorImpl<ISD::OutputArg> &Outs) {
2110 unsigned NumOps = Outs.size();
2111 for (unsigned i = 0; i != NumOps; ++i) {
2112 MVT ArgVT = Outs[i].VT;
2113 ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
2116 if (Outs[i].IsFixed)
2117 R = CC_MipsN(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
2119 R = CC_MipsN_VarArg(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
2123 dbgs() << "Call operand #" << i << " has unhandled type "
2124 << EVT(ArgVT).getEVTString();
2126 llvm_unreachable(0);
2131 //===----------------------------------------------------------------------===//
2132 // Call Calling Convention Implementation
2133 //===----------------------------------------------------------------------===//
2135 static const unsigned O32IntRegsSize = 4;
2137 static const uint16_t O32IntRegs[] = {
2138 Mips::A0, Mips::A1, Mips::A2, Mips::A3
2141 // Return next O32 integer argument register.
2142 static unsigned getNextIntArgReg(unsigned Reg) {
2143 assert((Reg == Mips::A0) || (Reg == Mips::A2));
2144 return (Reg == Mips::A0) ? Mips::A1 : Mips::A3;
2147 // Write ByVal Arg to arg registers and stack.
2149 WriteByValArg(SDValue& ByValChain, SDValue Chain, DebugLoc dl,
2150 SmallVector<std::pair<unsigned, SDValue>, 16>& RegsToPass,
2151 SmallVector<SDValue, 8>& MemOpChains, int& LastFI,
2152 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
2153 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2154 MVT PtrType, bool isLittle) {
2155 unsigned LocMemOffset = VA.getLocMemOffset();
2156 unsigned Offset = 0;
2157 uint32_t RemainingSize = Flags.getByValSize();
2158 unsigned ByValAlign = Flags.getByValAlign();
2160 // Copy the first 4 words of byval arg to registers A0 - A3.
2161 // FIXME: Use a stricter alignment if it enables better optimization in passes
2163 for (; RemainingSize >= 4 && LocMemOffset < 4 * 4;
2164 Offset += 4, RemainingSize -= 4, LocMemOffset += 4) {
2165 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2166 DAG.getConstant(Offset, MVT::i32));
2167 SDValue LoadVal = DAG.getLoad(MVT::i32, dl, Chain, LoadPtr,
2168 MachinePointerInfo(), false, false, false,
2169 std::min(ByValAlign, (unsigned )4));
2170 MemOpChains.push_back(LoadVal.getValue(1));
2171 unsigned DstReg = O32IntRegs[LocMemOffset / 4];
2172 RegsToPass.push_back(std::make_pair(DstReg, LoadVal));
2175 if (RemainingSize == 0)
2178 // If there still is a register available for argument passing, write the
2179 // remaining part of the structure to it using subword loads and shifts.
2180 if (LocMemOffset < 4 * 4) {
2181 assert(RemainingSize <= 3 && RemainingSize >= 1 &&
2182 "There must be one to three bytes remaining.");
2183 unsigned LoadSize = (RemainingSize == 3 ? 2 : RemainingSize);
2184 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2185 DAG.getConstant(Offset, MVT::i32));
2186 unsigned Alignment = std::min(ByValAlign, (unsigned )4);
2187 SDValue LoadVal = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, Chain,
2188 LoadPtr, MachinePointerInfo(),
2189 MVT::getIntegerVT(LoadSize * 8), false,
2191 MemOpChains.push_back(LoadVal.getValue(1));
2193 // If target is big endian, shift it to the most significant half-word or
2196 LoadVal = DAG.getNode(ISD::SHL, dl, MVT::i32, LoadVal,
2197 DAG.getConstant(32 - LoadSize * 8, MVT::i32));
2200 RemainingSize -= LoadSize;
2202 // Read second subword if necessary.
2203 if (RemainingSize != 0) {
2204 assert(RemainingSize == 1 && "There must be one byte remaining.");
2205 LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2206 DAG.getConstant(Offset, MVT::i32));
2207 unsigned Alignment = std::min(ByValAlign, (unsigned )2);
2208 SDValue Subword = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, Chain,
2209 LoadPtr, MachinePointerInfo(),
2210 MVT::i8, false, false, Alignment);
2211 MemOpChains.push_back(Subword.getValue(1));
2212 // Insert the loaded byte to LoadVal.
2213 // FIXME: Use INS if supported by target.
2214 unsigned ShiftAmt = isLittle ? 16 : 8;
2215 SDValue Shift = DAG.getNode(ISD::SHL, dl, MVT::i32, Subword,
2216 DAG.getConstant(ShiftAmt, MVT::i32));
2217 LoadVal = DAG.getNode(ISD::OR, dl, MVT::i32, LoadVal, Shift);
2220 unsigned DstReg = O32IntRegs[LocMemOffset / 4];
2221 RegsToPass.push_back(std::make_pair(DstReg, LoadVal));
2225 // Create a fixed object on stack at offset LocMemOffset and copy
2226 // remaining part of byval arg to it using memcpy.
2227 SDValue Src = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2228 DAG.getConstant(Offset, MVT::i32));
2229 LastFI = MFI->CreateFixedObject(RemainingSize, LocMemOffset, true);
2230 SDValue Dst = DAG.getFrameIndex(LastFI, PtrType);
2231 ByValChain = DAG.getMemcpy(ByValChain, dl, Dst, Src,
2232 DAG.getConstant(RemainingSize, MVT::i32),
2233 std::min(ByValAlign, (unsigned)4),
2234 /*isVolatile=*/false, /*AlwaysInline=*/false,
2235 MachinePointerInfo(0), MachinePointerInfo(0));
2238 // Copy Mips64 byVal arg to registers and stack.
2240 PassByValArg64(SDValue& ByValChain, SDValue Chain, DebugLoc dl,
2241 SmallVector<std::pair<unsigned, SDValue>, 16>& RegsToPass,
2242 SmallVector<SDValue, 8>& MemOpChains, int& LastFI,
2243 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
2244 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2245 EVT PtrTy, bool isLittle) {
2246 unsigned ByValSize = Flags.getByValSize();
2247 unsigned Alignment = std::min(Flags.getByValAlign(), (unsigned)8);
2248 bool IsRegLoc = VA.isRegLoc();
2249 unsigned Offset = 0; // Offset in # of bytes from the beginning of struct.
2250 unsigned LocMemOffset = 0;
2251 unsigned MemCpySize = ByValSize;
2254 LocMemOffset = VA.getLocMemOffset();
2256 const uint16_t *Reg = std::find(Mips64IntRegs, Mips64IntRegs + 8,
2258 const uint16_t *RegEnd = Mips64IntRegs + 8;
2260 // Copy double words to registers.
2261 for (; (Reg != RegEnd) && (ByValSize >= Offset + 8); ++Reg, Offset += 8) {
2262 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2263 DAG.getConstant(Offset, PtrTy));
2264 SDValue LoadVal = DAG.getLoad(MVT::i64, dl, Chain, LoadPtr,
2265 MachinePointerInfo(), false, false, false,
2267 MemOpChains.push_back(LoadVal.getValue(1));
2268 RegsToPass.push_back(std::make_pair(*Reg, LoadVal));
2271 // Return if the struct has been fully copied.
2272 if (!(MemCpySize = ByValSize - Offset))
2275 // If there is an argument register available, copy the remainder of the
2276 // byval argument with sub-doubleword loads and shifts.
2277 if (Reg != RegEnd) {
2278 assert((ByValSize < Offset + 8) &&
2279 "Size of the remainder should be smaller than 8-byte.");
2281 for (unsigned LoadSize = 4; Offset < ByValSize; LoadSize /= 2) {
2282 unsigned RemSize = ByValSize - Offset;
2284 if (RemSize < LoadSize)
2287 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2288 DAG.getConstant(Offset, PtrTy));
2290 DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i64, Chain, LoadPtr,
2291 MachinePointerInfo(), MVT::getIntegerVT(LoadSize * 8),
2292 false, false, Alignment);
2293 MemOpChains.push_back(LoadVal.getValue(1));
2295 // Offset in number of bits from double word boundary.
2296 unsigned OffsetDW = (Offset % 8) * 8;
2297 unsigned Shamt = isLittle ? OffsetDW : 64 - (OffsetDW + LoadSize * 8);
2298 SDValue Shift = DAG.getNode(ISD::SHL, dl, MVT::i64, LoadVal,
2299 DAG.getConstant(Shamt, MVT::i32));
2301 Val = Val.getNode() ? DAG.getNode(ISD::OR, dl, MVT::i64, Val, Shift) :
2304 Alignment = std::min(Alignment, LoadSize);
2307 RegsToPass.push_back(std::make_pair(*Reg, Val));
2312 assert(MemCpySize && "MemCpySize must not be zero.");
2314 // Create a fixed object on stack at offset LocMemOffset and copy
2315 // remainder of byval arg to it with memcpy.
2316 SDValue Src = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2317 DAG.getConstant(Offset, PtrTy));
2318 LastFI = MFI->CreateFixedObject(MemCpySize, LocMemOffset, true);
2319 SDValue Dst = DAG.getFrameIndex(LastFI, PtrTy);
2320 ByValChain = DAG.getMemcpy(ByValChain, dl, Dst, Src,
2321 DAG.getConstant(MemCpySize, PtrTy), Alignment,
2322 /*isVolatile=*/false, /*AlwaysInline=*/false,
2323 MachinePointerInfo(0), MachinePointerInfo(0));
2326 /// LowerCall - functions arguments are copied from virtual regs to
2327 /// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
2328 /// TODO: isTailCall.
2330 MipsTargetLowering::LowerCall(SDValue InChain, SDValue Callee,
2331 CallingConv::ID CallConv, bool isVarArg,
2332 bool doesNotRet, bool &isTailCall,
2333 const SmallVectorImpl<ISD::OutputArg> &Outs,
2334 const SmallVectorImpl<SDValue> &OutVals,
2335 const SmallVectorImpl<ISD::InputArg> &Ins,
2336 DebugLoc dl, SelectionDAG &DAG,
2337 SmallVectorImpl<SDValue> &InVals) const {
2338 // MIPs target does not yet support tail call optimization.
2341 MachineFunction &MF = DAG.getMachineFunction();
2342 MachineFrameInfo *MFI = MF.getFrameInfo();
2343 const TargetFrameLowering *TFL = MF.getTarget().getFrameLowering();
2344 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
2345 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2347 // Analyze operands of the call, assigning locations to each operand.
2348 SmallVector<CCValAssign, 16> ArgLocs;
2349 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2350 getTargetMachine(), ArgLocs, *DAG.getContext());
2353 CCInfo.AnalyzeCallOperands(Outs, CC_MipsO32);
2355 AnalyzeMips64CallOperands(CCInfo, Outs);
2357 CCInfo.AnalyzeCallOperands(Outs, CC_Mips);
2359 // Get a count of how many bytes are to be pushed on the stack.
2360 unsigned NextStackOffset = CCInfo.getNextStackOffset();
2362 // Chain is the output chain of the last Load/Store or CopyToReg node.
2363 // ByValChain is the output chain of the last Memcpy node created for copying
2364 // byval arguments to the stack.
2365 SDValue Chain, CallSeqStart, ByValChain;
2366 SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true);
2367 Chain = CallSeqStart = DAG.getCALLSEQ_START(InChain, NextStackOffsetVal);
2368 ByValChain = InChain;
2370 // If this is the first call, create a stack frame object that points to
2371 // a location to which .cprestore saves $gp.
2372 if (IsO32 && IsPIC && MipsFI->globalBaseRegFixed() && !MipsFI->getGPFI())
2373 MipsFI->setGPFI(MFI->CreateFixedObject(4, 0, true));
2375 // Get the frame index of the stack frame object that points to the location
2376 // of dynamically allocated area on the stack.
2377 int DynAllocFI = MipsFI->getDynAllocFI();
2379 // Update size of the maximum argument space.
2380 // For O32, a minimum of four words (16 bytes) of argument space is
2383 NextStackOffset = std::max(NextStackOffset, (unsigned)16);
2385 unsigned MaxCallFrameSize = MipsFI->getMaxCallFrameSize();
2387 if (MaxCallFrameSize < NextStackOffset) {
2388 MipsFI->setMaxCallFrameSize(NextStackOffset);
2390 // Set the offsets relative to $sp of the $gp restore slot and dynamically
2391 // allocated stack space. These offsets must be aligned to a boundary
2392 // determined by the stack alignment of the ABI.
2393 unsigned StackAlignment = TFL->getStackAlignment();
2394 NextStackOffset = (NextStackOffset + StackAlignment - 1) /
2395 StackAlignment * StackAlignment;
2397 if (MipsFI->needGPSaveRestore())
2398 MFI->setObjectOffset(MipsFI->getGPFI(), NextStackOffset);
2400 MFI->setObjectOffset(DynAllocFI, NextStackOffset);
2403 // With EABI is it possible to have 16 args on registers.
2404 SmallVector<std::pair<unsigned, SDValue>, 16> RegsToPass;
2405 SmallVector<SDValue, 8> MemOpChains;
2407 int FirstFI = -MFI->getNumFixedObjects() - 1, LastFI = 0;
2409 // Walk the register/memloc assignments, inserting copies/loads.
2410 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2411 SDValue Arg = OutVals[i];
2412 CCValAssign &VA = ArgLocs[i];
2413 MVT ValVT = VA.getValVT(), LocVT = VA.getLocVT();
2414 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2417 if (Flags.isByVal()) {
2418 assert(Flags.getByValSize() &&
2419 "ByVal args of size 0 should have been ignored by front-end.");
2421 WriteByValArg(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI,
2422 MFI, DAG, Arg, VA, Flags, getPointerTy(),
2423 Subtarget->isLittle());
2425 PassByValArg64(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI,
2426 MFI, DAG, Arg, VA, Flags, getPointerTy(),
2427 Subtarget->isLittle());
2431 // Promote the value if needed.
2432 switch (VA.getLocInfo()) {
2433 default: llvm_unreachable("Unknown loc info!");
2434 case CCValAssign::Full:
2435 if (VA.isRegLoc()) {
2436 if ((ValVT == MVT::f32 && LocVT == MVT::i32) ||
2437 (ValVT == MVT::f64 && LocVT == MVT::i64))
2438 Arg = DAG.getNode(ISD::BITCAST, dl, LocVT, Arg);
2439 else if (ValVT == MVT::f64 && LocVT == MVT::i32) {
2440 SDValue Lo = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32,
2441 Arg, DAG.getConstant(0, MVT::i32));
2442 SDValue Hi = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32,
2443 Arg, DAG.getConstant(1, MVT::i32));
2444 if (!Subtarget->isLittle())
2446 unsigned LocRegLo = VA.getLocReg();
2447 unsigned LocRegHigh = getNextIntArgReg(LocRegLo);
2448 RegsToPass.push_back(std::make_pair(LocRegLo, Lo));
2449 RegsToPass.push_back(std::make_pair(LocRegHigh, Hi));
2454 case CCValAssign::SExt:
2455 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, LocVT, Arg);
2457 case CCValAssign::ZExt:
2458 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, LocVT, Arg);
2460 case CCValAssign::AExt:
2461 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, LocVT, Arg);
2465 // Arguments that can be passed on register must be kept at
2466 // RegsToPass vector
2467 if (VA.isRegLoc()) {
2468 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2472 // Register can't get to this point...
2473 assert(VA.isMemLoc());
2475 // Create the frame index object for this incoming parameter
2476 LastFI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2477 VA.getLocMemOffset(), true);
2478 SDValue PtrOff = DAG.getFrameIndex(LastFI, getPointerTy());
2480 // emit ISD::STORE whichs stores the
2481 // parameter value to a stack Location
2482 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
2483 MachinePointerInfo(), false, false, 0));
2486 // Extend range of indices of frame objects for outgoing arguments that were
2487 // created during this function call. Skip this step if no such objects were
2490 MipsFI->extendOutArgFIRange(FirstFI, LastFI);
2492 // If a memcpy has been created to copy a byval arg to a stack, replace the
2493 // chain input of CallSeqStart with ByValChain.
2494 if (InChain != ByValChain)
2495 DAG.UpdateNodeOperands(CallSeqStart.getNode(), ByValChain,
2496 NextStackOffsetVal);
2498 // Transform all store nodes into one single node because all store
2499 // nodes are independent of each other.
2500 if (!MemOpChains.empty())
2501 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2502 &MemOpChains[0], MemOpChains.size());
2504 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
2505 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
2506 // node so that legalize doesn't hack it.
2507 unsigned char OpFlag;
2508 bool IsPICCall = (IsN64 || IsPIC); // true if calls are translated to jalr $25
2509 bool GlobalOrExternal = false;
2512 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2513 if (IsPICCall && G->getGlobal()->hasInternalLinkage()) {
2514 OpFlag = IsO32 ? MipsII::MO_GOT : MipsII::MO_GOT_PAGE;
2515 unsigned char LoFlag = IsO32 ? MipsII::MO_ABS_LO : MipsII::MO_GOT_OFST;
2516 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(), 0,
2518 CalleeLo = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(),
2521 OpFlag = IsPICCall ? MipsII::MO_GOT_CALL : MipsII::MO_NO_FLAG;
2522 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
2523 getPointerTy(), 0, OpFlag);
2526 GlobalOrExternal = true;
2528 else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2529 if (IsN64 || (!IsO32 && IsPIC))
2530 OpFlag = MipsII::MO_GOT_DISP;
2531 else if (!IsPIC) // !N64 && static
2532 OpFlag = MipsII::MO_NO_FLAG;
2534 OpFlag = MipsII::MO_GOT_CALL;
2535 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2537 GlobalOrExternal = true;
2542 // Create nodes that load address of callee and copy it to T9
2544 if (GlobalOrExternal) {
2545 // Load callee address
2546 Callee = DAG.getNode(MipsISD::Wrapper, dl, getPointerTy(),
2547 GetGlobalReg(DAG, getPointerTy()), Callee);
2548 SDValue LoadValue = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
2549 Callee, MachinePointerInfo::getGOT(),
2550 false, false, false, 0);
2552 // Use GOT+LO if callee has internal linkage.
2553 if (CalleeLo.getNode()) {
2554 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, getPointerTy(), CalleeLo);
2555 Callee = DAG.getNode(ISD::ADD, dl, getPointerTy(), LoadValue, Lo);
2561 // T9 should contain the address of the callee function if
2562 // -reloction-model=pic or it is an indirect call.
2563 if (IsPICCall || !GlobalOrExternal) {
2565 unsigned T9Reg = IsN64 ? Mips::T9_64 : Mips::T9;
2566 Chain = DAG.getCopyToReg(Chain, dl, T9Reg, Callee, SDValue(0, 0));
2567 InFlag = Chain.getValue(1);
2568 Callee = DAG.getRegister(T9Reg, getPointerTy());
2571 // Build a sequence of copy-to-reg nodes chained together with token
2572 // chain and flag operands which copy the outgoing args into registers.
2573 // The InFlag in necessary since all emitted instructions must be
2575 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2576 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2577 RegsToPass[i].second, InFlag);
2578 InFlag = Chain.getValue(1);
2581 // MipsJmpLink = #chain, #target_address, #opt_in_flags...
2582 // = Chain, Callee, Reg#1, Reg#2, ...
2584 // Returns a chain & a flag for retval copy to use.
2585 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2586 SmallVector<SDValue, 8> Ops;
2587 Ops.push_back(Chain);
2588 Ops.push_back(Callee);
2590 // Add argument registers to the end of the list so that they are
2591 // known live into the call.
2592 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2593 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2594 RegsToPass[i].second.getValueType()));
2596 // Add a register mask operand representing the call-preserved registers.
2597 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2598 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
2599 assert(Mask && "Missing call preserved mask for calling convention");
2600 Ops.push_back(DAG.getRegisterMask(Mask));
2602 if (InFlag.getNode())
2603 Ops.push_back(InFlag);
2605 Chain = DAG.getNode(MipsISD::JmpLink, dl, NodeTys, &Ops[0], Ops.size());
2606 InFlag = Chain.getValue(1);
2608 // Create the CALLSEQ_END node.
2609 Chain = DAG.getCALLSEQ_END(Chain,
2610 DAG.getIntPtrConstant(NextStackOffset, true),
2611 DAG.getIntPtrConstant(0, true), InFlag);
2612 InFlag = Chain.getValue(1);
2614 // Handle result values, copying them out of physregs into vregs that we
2616 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2617 Ins, dl, DAG, InVals);
2620 /// LowerCallResult - Lower the result values of a call into the
2621 /// appropriate copies out of appropriate physical registers.
2623 MipsTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2624 CallingConv::ID CallConv, bool isVarArg,
2625 const SmallVectorImpl<ISD::InputArg> &Ins,
2626 DebugLoc dl, SelectionDAG &DAG,
2627 SmallVectorImpl<SDValue> &InVals) const {
2628 // Assign locations to each value returned by this call.
2629 SmallVector<CCValAssign, 16> RVLocs;
2630 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2631 getTargetMachine(), RVLocs, *DAG.getContext());
2633 CCInfo.AnalyzeCallResult(Ins, RetCC_Mips);
2635 // Copy all of the result registers out of their specified physreg.
2636 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2637 Chain = DAG.getCopyFromReg(Chain, dl, RVLocs[i].getLocReg(),
2638 RVLocs[i].getValVT(), InFlag).getValue(1);
2639 InFlag = Chain.getValue(2);
2640 InVals.push_back(Chain.getValue(0));
2646 //===----------------------------------------------------------------------===//
2647 // Formal Arguments Calling Convention Implementation
2648 //===----------------------------------------------------------------------===//
2649 static void ReadByValArg(MachineFunction &MF, SDValue Chain, DebugLoc dl,
2650 std::vector<SDValue>& OutChains,
2651 SelectionDAG &DAG, unsigned NumWords, SDValue FIN,
2652 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2653 const Argument *FuncArg) {
2654 unsigned LocMem = VA.getLocMemOffset();
2655 unsigned FirstWord = LocMem / 4;
2657 // copy register A0 - A3 to frame object
2658 for (unsigned i = 0; i < NumWords; ++i) {
2659 unsigned CurWord = FirstWord + i;
2660 if (CurWord >= O32IntRegsSize)
2663 unsigned SrcReg = O32IntRegs[CurWord];
2664 unsigned Reg = AddLiveIn(MF, SrcReg, Mips::CPURegsRegisterClass);
2665 SDValue StorePtr = DAG.getNode(ISD::ADD, dl, MVT::i32, FIN,
2666 DAG.getConstant(i * 4, MVT::i32));
2667 SDValue Store = DAG.getStore(Chain, dl, DAG.getRegister(Reg, MVT::i32),
2668 StorePtr, MachinePointerInfo(FuncArg, i * 4),
2670 OutChains.push_back(Store);
2674 // Create frame object on stack and copy registers used for byval passing to it.
2676 CopyMips64ByValRegs(MachineFunction &MF, SDValue Chain, DebugLoc dl,
2677 std::vector<SDValue>& OutChains, SelectionDAG &DAG,
2678 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2679 MachineFrameInfo *MFI, bool IsRegLoc,
2680 SmallVectorImpl<SDValue> &InVals, MipsFunctionInfo *MipsFI,
2681 EVT PtrTy, const Argument *FuncArg) {
2682 const uint16_t *Reg = Mips64IntRegs + 8;
2683 int FOOffset; // Frame object offset from virtual frame pointer.
2686 Reg = std::find(Mips64IntRegs, Mips64IntRegs + 8, VA.getLocReg());
2687 FOOffset = (Reg - Mips64IntRegs) * 8 - 8 * 8;
2690 FOOffset = VA.getLocMemOffset();
2692 // Create frame object.
2693 unsigned NumRegs = (Flags.getByValSize() + 7) / 8;
2694 unsigned LastFI = MFI->CreateFixedObject(NumRegs * 8, FOOffset, true);
2695 SDValue FIN = DAG.getFrameIndex(LastFI, PtrTy);
2696 InVals.push_back(FIN);
2698 // Copy arg registers.
2699 for (unsigned I = 0; (Reg != Mips64IntRegs + 8) && (I < NumRegs);
2701 unsigned VReg = AddLiveIn(MF, *Reg, Mips::CPU64RegsRegisterClass);
2702 SDValue StorePtr = DAG.getNode(ISD::ADD, dl, PtrTy, FIN,
2703 DAG.getConstant(I * 8, PtrTy));
2704 SDValue Store = DAG.getStore(Chain, dl, DAG.getRegister(VReg, MVT::i64),
2705 StorePtr, MachinePointerInfo(FuncArg, I * 8),
2707 OutChains.push_back(Store);
2713 /// LowerFormalArguments - transform physical registers into virtual registers
2714 /// and generate load operations for arguments places on the stack.
2716 MipsTargetLowering::LowerFormalArguments(SDValue Chain,
2717 CallingConv::ID CallConv,
2719 const SmallVectorImpl<ISD::InputArg> &Ins,
2720 DebugLoc dl, SelectionDAG &DAG,
2721 SmallVectorImpl<SDValue> &InVals)
2723 MachineFunction &MF = DAG.getMachineFunction();
2724 MachineFrameInfo *MFI = MF.getFrameInfo();
2725 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2727 MipsFI->setVarArgsFrameIndex(0);
2729 // Used with vargs to acumulate store chains.
2730 std::vector<SDValue> OutChains;
2732 // Assign locations to all of the incoming arguments.
2733 SmallVector<CCValAssign, 16> ArgLocs;
2734 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2735 getTargetMachine(), ArgLocs, *DAG.getContext());
2738 CCInfo.AnalyzeFormalArguments(Ins, CC_MipsO32);
2740 CCInfo.AnalyzeFormalArguments(Ins, CC_Mips);
2742 Function::const_arg_iterator FuncArg =
2743 DAG.getMachineFunction().getFunction()->arg_begin();
2744 int LastFI = 0;// MipsFI->LastInArgFI is 0 at the entry of this function.
2746 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i, ++FuncArg) {
2747 CCValAssign &VA = ArgLocs[i];
2748 EVT ValVT = VA.getValVT();
2749 ISD::ArgFlagsTy Flags = Ins[i].Flags;
2750 bool IsRegLoc = VA.isRegLoc();
2752 if (Flags.isByVal()) {
2753 assert(Flags.getByValSize() &&
2754 "ByVal args of size 0 should have been ignored by front-end.");
2756 unsigned NumWords = (Flags.getByValSize() + 3) / 4;
2757 LastFI = MFI->CreateFixedObject(NumWords * 4, VA.getLocMemOffset(),
2759 SDValue FIN = DAG.getFrameIndex(LastFI, getPointerTy());
2760 InVals.push_back(FIN);
2761 ReadByValArg(MF, Chain, dl, OutChains, DAG, NumWords, FIN, VA, Flags,
2764 LastFI = CopyMips64ByValRegs(MF, Chain, dl, OutChains, DAG, VA, Flags,
2765 MFI, IsRegLoc, InVals, MipsFI,
2766 getPointerTy(), &*FuncArg);
2770 // Arguments stored on registers
2772 EVT RegVT = VA.getLocVT();
2773 unsigned ArgReg = VA.getLocReg();
2774 const TargetRegisterClass *RC;
2776 if (RegVT == MVT::i32)
2777 RC = Mips::CPURegsRegisterClass;
2778 else if (RegVT == MVT::i64)
2779 RC = Mips::CPU64RegsRegisterClass;
2780 else if (RegVT == MVT::f32)
2781 RC = Mips::FGR32RegisterClass;
2782 else if (RegVT == MVT::f64)
2783 RC = HasMips64 ? Mips::FGR64RegisterClass : Mips::AFGR64RegisterClass;
2785 llvm_unreachable("RegVT not supported by FormalArguments Lowering");
2787 // Transform the arguments stored on
2788 // physical registers into virtual ones
2789 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), ArgReg, RC);
2790 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2792 // If this is an 8 or 16-bit value, it has been passed promoted
2793 // to 32 bits. Insert an assert[sz]ext to capture this, then
2794 // truncate to the right size.
2795 if (VA.getLocInfo() != CCValAssign::Full) {
2796 unsigned Opcode = 0;
2797 if (VA.getLocInfo() == CCValAssign::SExt)
2798 Opcode = ISD::AssertSext;
2799 else if (VA.getLocInfo() == CCValAssign::ZExt)
2800 Opcode = ISD::AssertZext;
2802 ArgValue = DAG.getNode(Opcode, dl, RegVT, ArgValue,
2803 DAG.getValueType(ValVT));
2804 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, ValVT, ArgValue);
2807 // Handle floating point arguments passed in integer registers.
2808 if ((RegVT == MVT::i32 && ValVT == MVT::f32) ||
2809 (RegVT == MVT::i64 && ValVT == MVT::f64))
2810 ArgValue = DAG.getNode(ISD::BITCAST, dl, ValVT, ArgValue);
2811 else if (IsO32 && RegVT == MVT::i32 && ValVT == MVT::f64) {
2812 unsigned Reg2 = AddLiveIn(DAG.getMachineFunction(),
2813 getNextIntArgReg(ArgReg), RC);
2814 SDValue ArgValue2 = DAG.getCopyFromReg(Chain, dl, Reg2, RegVT);
2815 if (!Subtarget->isLittle())
2816 std::swap(ArgValue, ArgValue2);
2817 ArgValue = DAG.getNode(MipsISD::BuildPairF64, dl, MVT::f64,
2818 ArgValue, ArgValue2);
2821 InVals.push_back(ArgValue);
2822 } else { // VA.isRegLoc()
2825 assert(VA.isMemLoc());
2827 // The stack pointer offset is relative to the caller stack frame.
2828 LastFI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2829 VA.getLocMemOffset(), true);
2831 // Create load nodes to retrieve arguments from the stack
2832 SDValue FIN = DAG.getFrameIndex(LastFI, getPointerTy());
2833 InVals.push_back(DAG.getLoad(ValVT, dl, Chain, FIN,
2834 MachinePointerInfo::getFixedStack(LastFI),
2835 false, false, false, 0));
2839 // The mips ABIs for returning structs by value requires that we copy
2840 // the sret argument into $v0 for the return. Save the argument into
2841 // a virtual register so that we can access it from the return points.
2842 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
2843 unsigned Reg = MipsFI->getSRetReturnReg();
2845 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i32));
2846 MipsFI->setSRetReturnReg(Reg);
2848 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
2849 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
2853 unsigned NumOfRegs = IsO32 ? 4 : 8;
2854 const uint16_t *ArgRegs = IsO32 ? O32IntRegs : Mips64IntRegs;
2855 unsigned Idx = CCInfo.getFirstUnallocated(ArgRegs, NumOfRegs);
2856 int FirstRegSlotOffset = IsO32 ? 0 : -64 ; // offset of $a0's slot.
2857 const TargetRegisterClass *RC
2858 = IsO32 ? Mips::CPURegsRegisterClass : Mips::CPU64RegsRegisterClass;
2859 unsigned RegSize = RC->getSize();
2860 int RegSlotOffset = FirstRegSlotOffset + Idx * RegSize;
2862 // Offset of the first variable argument from stack pointer.
2863 int FirstVaArgOffset;
2865 if (IsO32 || (Idx == NumOfRegs)) {
2867 (CCInfo.getNextStackOffset() + RegSize - 1) / RegSize * RegSize;
2869 FirstVaArgOffset = RegSlotOffset;
2871 // Record the frame index of the first variable argument
2872 // which is a value necessary to VASTART.
2873 LastFI = MFI->CreateFixedObject(RegSize, FirstVaArgOffset, true);
2874 MipsFI->setVarArgsFrameIndex(LastFI);
2876 // Copy the integer registers that have not been used for argument passing
2877 // to the argument register save area. For O32, the save area is allocated
2878 // in the caller's stack frame, while for N32/64, it is allocated in the
2879 // callee's stack frame.
2880 for (int StackOffset = RegSlotOffset;
2881 Idx < NumOfRegs; ++Idx, StackOffset += RegSize) {
2882 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), ArgRegs[Idx], RC);
2883 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg,
2884 MVT::getIntegerVT(RegSize * 8));
2885 LastFI = MFI->CreateFixedObject(RegSize, StackOffset, true);
2886 SDValue PtrOff = DAG.getFrameIndex(LastFI, getPointerTy());
2887 OutChains.push_back(DAG.getStore(Chain, dl, ArgValue, PtrOff,
2888 MachinePointerInfo(), false, false, 0));
2892 MipsFI->setLastInArgFI(LastFI);
2894 // All stores are grouped in one node to allow the matching between
2895 // the size of Ins and InVals. This only happens when on varg functions
2896 if (!OutChains.empty()) {
2897 OutChains.push_back(Chain);
2898 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2899 &OutChains[0], OutChains.size());
2905 //===----------------------------------------------------------------------===//
2906 // Return Value Calling Convention Implementation
2907 //===----------------------------------------------------------------------===//
2910 MipsTargetLowering::LowerReturn(SDValue Chain,
2911 CallingConv::ID CallConv, bool isVarArg,
2912 const SmallVectorImpl<ISD::OutputArg> &Outs,
2913 const SmallVectorImpl<SDValue> &OutVals,
2914 DebugLoc dl, SelectionDAG &DAG) const {
2916 // CCValAssign - represent the assignment of
2917 // the return value to a location
2918 SmallVector<CCValAssign, 16> RVLocs;
2920 // CCState - Info about the registers and stack slot.
2921 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2922 getTargetMachine(), RVLocs, *DAG.getContext());
2924 // Analize return values.
2925 CCInfo.AnalyzeReturn(Outs, RetCC_Mips);
2927 // If this is the first return lowered for this function, add
2928 // the regs to the liveout set for the function.
2929 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
2930 for (unsigned i = 0; i != RVLocs.size(); ++i)
2931 if (RVLocs[i].isRegLoc())
2932 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
2937 // Copy the result values into the output registers.
2938 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2939 CCValAssign &VA = RVLocs[i];
2940 assert(VA.isRegLoc() && "Can only return in registers!");
2942 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), OutVals[i], Flag);
2944 // guarantee that all emitted copies are
2945 // stuck together, avoiding something bad
2946 Flag = Chain.getValue(1);
2949 // The mips ABIs for returning structs by value requires that we copy
2950 // the sret argument into $v0 for the return. We saved the argument into
2951 // a virtual register in the entry block, so now we copy the value out
2953 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
2954 MachineFunction &MF = DAG.getMachineFunction();
2955 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2956 unsigned Reg = MipsFI->getSRetReturnReg();
2959 llvm_unreachable("sret virtual register not created in the entry block");
2960 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
2962 Chain = DAG.getCopyToReg(Chain, dl, Mips::V0, Val, Flag);
2963 Flag = Chain.getValue(1);
2966 // Return on Mips is always a "jr $ra"
2968 return DAG.getNode(MipsISD::Ret, dl, MVT::Other,
2969 Chain, DAG.getRegister(Mips::RA, MVT::i32), Flag);
2971 return DAG.getNode(MipsISD::Ret, dl, MVT::Other,
2972 Chain, DAG.getRegister(Mips::RA, MVT::i32));
2975 //===----------------------------------------------------------------------===//
2976 // Mips Inline Assembly Support
2977 //===----------------------------------------------------------------------===//
2979 /// getConstraintType - Given a constraint letter, return the type of
2980 /// constraint it is for this target.
2981 MipsTargetLowering::ConstraintType MipsTargetLowering::
2982 getConstraintType(const std::string &Constraint) const
2984 // Mips specific constrainy
2985 // GCC config/mips/constraints.md
2987 // 'd' : An address register. Equivalent to r
2988 // unless generating MIPS16 code.
2989 // 'y' : Equivalent to r; retained for
2990 // backwards compatibility.
2991 // 'f' : Floating Point registers.
2992 if (Constraint.size() == 1) {
2993 switch (Constraint[0]) {
2998 return C_RegisterClass;
3001 return TargetLowering::getConstraintType(Constraint);
3004 /// Examine constraint type and operand type and determine a weight value.
3005 /// This object must already have been set up with the operand type
3006 /// and the current alternative constraint selected.
3007 TargetLowering::ConstraintWeight
3008 MipsTargetLowering::getSingleConstraintMatchWeight(
3009 AsmOperandInfo &info, const char *constraint) const {
3010 ConstraintWeight weight = CW_Invalid;
3011 Value *CallOperandVal = info.CallOperandVal;
3012 // If we don't have a value, we can't do a match,
3013 // but allow it at the lowest weight.
3014 if (CallOperandVal == NULL)
3016 Type *type = CallOperandVal->getType();
3017 // Look at the constraint type.
3018 switch (*constraint) {
3020 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
3024 if (type->isIntegerTy())
3025 weight = CW_Register;
3028 if (type->isFloatTy())
3029 weight = CW_Register;
3035 /// Given a register class constraint, like 'r', if this corresponds directly
3036 /// to an LLVM register class, return a register of 0 and the register class
3038 std::pair<unsigned, const TargetRegisterClass*> MipsTargetLowering::
3039 getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const
3041 if (Constraint.size() == 1) {
3042 switch (Constraint[0]) {
3043 case 'd': // Address register. Same as 'r' unless generating MIPS16 code.
3044 case 'y': // Same as 'r'. Exists for compatibility.
3047 return std::make_pair(0U, Mips::CPURegsRegisterClass);
3048 assert(VT == MVT::i64 && "Unexpected type.");
3049 return std::make_pair(0U, Mips::CPU64RegsRegisterClass);
3052 return std::make_pair(0U, Mips::FGR32RegisterClass);
3053 if ((VT == MVT::f64) && (!Subtarget->isSingleFloat())) {
3054 if (Subtarget->isFP64bit())
3055 return std::make_pair(0U, Mips::FGR64RegisterClass);
3057 return std::make_pair(0U, Mips::AFGR64RegisterClass);
3061 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
3065 MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
3066 // The Mips target isn't yet aware of offsets.
3070 bool MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3071 if (VT != MVT::f32 && VT != MVT::f64)
3073 if (Imm.isNegZero())
3075 return Imm.isZero();
3078 unsigned MipsTargetLowering::getJumpTableEncoding() const {
3080 return MachineJumpTableInfo::EK_GPRel64BlockAddress;
3082 return TargetLowering::getJumpTableEncoding();