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::CPURegsRegClass);
102 addRegisterClass(MVT::i64, &Mips::CPU64RegsRegClass);
104 if (!TM.Options.UseSoftFloat) {
105 addRegisterClass(MVT::f32, &Mips::FGR32RegClass);
107 // When dealing with single precision only, use libcalls
108 if (!Subtarget->isSingleFloat()) {
110 addRegisterClass(MVT::f64, &Mips::FGR64RegClass);
112 addRegisterClass(MVT::f64, &Mips::AFGR64RegClass);
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 if (!TM.Options.NoNaNsFPMath) {
220 setOperationAction(ISD::FNEG, MVT::f32, Expand);
221 setOperationAction(ISD::FNEG, MVT::f64, Expand);
224 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
225 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
226 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
227 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
229 setOperationAction(ISD::VAARG, MVT::Other, Expand);
230 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
231 setOperationAction(ISD::VAEND, MVT::Other, Expand);
233 // Use the default for now
234 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
235 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
237 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Expand);
238 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand);
239 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);
240 setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
242 setInsertFencesForAtomic(true);
244 if (Subtarget->isSingleFloat())
245 setOperationAction(ISD::SELECT_CC, MVT::f64, Expand);
247 if (!Subtarget->hasSEInReg()) {
248 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
249 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
252 if (!Subtarget->hasBitCount()) {
253 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
254 setOperationAction(ISD::CTLZ, MVT::i64, Expand);
257 if (!Subtarget->hasSwap()) {
258 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
259 setOperationAction(ISD::BSWAP, MVT::i64, Expand);
262 setTargetDAGCombine(ISD::ADDE);
263 setTargetDAGCombine(ISD::SUBE);
264 setTargetDAGCombine(ISD::SDIVREM);
265 setTargetDAGCombine(ISD::UDIVREM);
266 setTargetDAGCombine(ISD::SELECT);
267 setTargetDAGCombine(ISD::AND);
268 setTargetDAGCombine(ISD::OR);
270 setMinFunctionAlignment(HasMips64 ? 3 : 2);
272 setStackPointerRegisterToSaveRestore(IsN64 ? Mips::SP_64 : Mips::SP);
273 computeRegisterProperties();
275 setExceptionPointerRegister(IsN64 ? Mips::A0_64 : Mips::A0);
276 setExceptionSelectorRegister(IsN64 ? Mips::A1_64 : Mips::A1);
279 bool MipsTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
280 MVT::SimpleValueType SVT = VT.getSimpleVT().SimpleTy;
288 return Subtarget->hasMips32r2Or64();
294 EVT MipsTargetLowering::getSetCCResultType(EVT VT) const {
299 // Transforms a subgraph in CurDAG if the following pattern is found:
300 // (addc multLo, Lo0), (adde multHi, Hi0),
302 // multHi/Lo: product of multiplication
303 // Lo0: initial value of Lo register
304 // Hi0: initial value of Hi register
305 // Return true if pattern matching was successful.
306 static bool SelectMadd(SDNode* ADDENode, SelectionDAG* CurDAG) {
307 // ADDENode's second operand must be a flag output of an ADDC node in order
308 // for the matching to be successful.
309 SDNode* ADDCNode = ADDENode->getOperand(2).getNode();
311 if (ADDCNode->getOpcode() != ISD::ADDC)
314 SDValue MultHi = ADDENode->getOperand(0);
315 SDValue MultLo = ADDCNode->getOperand(0);
316 SDNode* MultNode = MultHi.getNode();
317 unsigned MultOpc = MultHi.getOpcode();
319 // MultHi and MultLo must be generated by the same node,
320 if (MultLo.getNode() != MultNode)
323 // and it must be a multiplication.
324 if (MultOpc != ISD::SMUL_LOHI && MultOpc != ISD::UMUL_LOHI)
327 // MultLo amd MultHi must be the first and second output of MultNode
329 if (MultHi.getResNo() != 1 || MultLo.getResNo() != 0)
332 // Transform this to a MADD only if ADDENode and ADDCNode are the only users
333 // of the values of MultNode, in which case MultNode will be removed in later
335 // If there exist users other than ADDENode or ADDCNode, this function returns
336 // here, which will result in MultNode being mapped to a single MULT
337 // instruction node rather than a pair of MULT and MADD instructions being
339 if (!MultHi.hasOneUse() || !MultLo.hasOneUse())
342 SDValue Chain = CurDAG->getEntryNode();
343 DebugLoc dl = ADDENode->getDebugLoc();
345 // create MipsMAdd(u) node
346 MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MAddu : MipsISD::MAdd;
348 SDValue MAdd = CurDAG->getNode(MultOpc, dl, MVT::Glue,
349 MultNode->getOperand(0),// Factor 0
350 MultNode->getOperand(1),// Factor 1
351 ADDCNode->getOperand(1),// Lo0
352 ADDENode->getOperand(1));// Hi0
354 // create CopyFromReg nodes
355 SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, dl, Mips::LO, MVT::i32,
357 SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), dl,
359 CopyFromLo.getValue(2));
361 // replace uses of adde and addc here
362 if (!SDValue(ADDCNode, 0).use_empty())
363 CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDCNode, 0), CopyFromLo);
365 if (!SDValue(ADDENode, 0).use_empty())
366 CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDENode, 0), CopyFromHi);
372 // Transforms a subgraph in CurDAG if the following pattern is found:
373 // (addc Lo0, multLo), (sube Hi0, multHi),
375 // multHi/Lo: product of multiplication
376 // Lo0: initial value of Lo register
377 // Hi0: initial value of Hi register
378 // Return true if pattern matching was successful.
379 static bool SelectMsub(SDNode* SUBENode, SelectionDAG* CurDAG) {
380 // SUBENode's second operand must be a flag output of an SUBC node in order
381 // for the matching to be successful.
382 SDNode* SUBCNode = SUBENode->getOperand(2).getNode();
384 if (SUBCNode->getOpcode() != ISD::SUBC)
387 SDValue MultHi = SUBENode->getOperand(1);
388 SDValue MultLo = SUBCNode->getOperand(1);
389 SDNode* MultNode = MultHi.getNode();
390 unsigned MultOpc = MultHi.getOpcode();
392 // MultHi and MultLo must be generated by the same node,
393 if (MultLo.getNode() != MultNode)
396 // and it must be a multiplication.
397 if (MultOpc != ISD::SMUL_LOHI && MultOpc != ISD::UMUL_LOHI)
400 // MultLo amd MultHi must be the first and second output of MultNode
402 if (MultHi.getResNo() != 1 || MultLo.getResNo() != 0)
405 // Transform this to a MSUB only if SUBENode and SUBCNode are the only users
406 // of the values of MultNode, in which case MultNode will be removed in later
408 // If there exist users other than SUBENode or SUBCNode, this function returns
409 // here, which will result in MultNode being mapped to a single MULT
410 // instruction node rather than a pair of MULT and MSUB instructions being
412 if (!MultHi.hasOneUse() || !MultLo.hasOneUse())
415 SDValue Chain = CurDAG->getEntryNode();
416 DebugLoc dl = SUBENode->getDebugLoc();
418 // create MipsSub(u) node
419 MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MSubu : MipsISD::MSub;
421 SDValue MSub = CurDAG->getNode(MultOpc, dl, MVT::Glue,
422 MultNode->getOperand(0),// Factor 0
423 MultNode->getOperand(1),// Factor 1
424 SUBCNode->getOperand(0),// Lo0
425 SUBENode->getOperand(0));// Hi0
427 // create CopyFromReg nodes
428 SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, dl, Mips::LO, MVT::i32,
430 SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), dl,
432 CopyFromLo.getValue(2));
434 // replace uses of sube and subc here
435 if (!SDValue(SUBCNode, 0).use_empty())
436 CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBCNode, 0), CopyFromLo);
438 if (!SDValue(SUBENode, 0).use_empty())
439 CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBENode, 0), CopyFromHi);
444 static SDValue PerformADDECombine(SDNode *N, SelectionDAG& DAG,
445 TargetLowering::DAGCombinerInfo &DCI,
446 const MipsSubtarget* Subtarget) {
447 if (DCI.isBeforeLegalize())
450 if (Subtarget->hasMips32() && N->getValueType(0) == MVT::i32 &&
452 return SDValue(N, 0);
457 static SDValue PerformSUBECombine(SDNode *N, SelectionDAG& DAG,
458 TargetLowering::DAGCombinerInfo &DCI,
459 const MipsSubtarget* Subtarget) {
460 if (DCI.isBeforeLegalize())
463 if (Subtarget->hasMips32() && N->getValueType(0) == MVT::i32 &&
465 return SDValue(N, 0);
470 static SDValue PerformDivRemCombine(SDNode *N, SelectionDAG& DAG,
471 TargetLowering::DAGCombinerInfo &DCI,
472 const MipsSubtarget* Subtarget) {
473 if (DCI.isBeforeLegalizeOps())
476 EVT Ty = N->getValueType(0);
477 unsigned LO = (Ty == MVT::i32) ? Mips::LO : Mips::LO64;
478 unsigned HI = (Ty == MVT::i32) ? Mips::HI : Mips::HI64;
479 unsigned opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem :
481 DebugLoc dl = N->getDebugLoc();
483 SDValue DivRem = DAG.getNode(opc, dl, MVT::Glue,
484 N->getOperand(0), N->getOperand(1));
485 SDValue InChain = DAG.getEntryNode();
486 SDValue InGlue = DivRem;
489 if (N->hasAnyUseOfValue(0)) {
490 SDValue CopyFromLo = DAG.getCopyFromReg(InChain, dl, LO, Ty,
492 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), CopyFromLo);
493 InChain = CopyFromLo.getValue(1);
494 InGlue = CopyFromLo.getValue(2);
498 if (N->hasAnyUseOfValue(1)) {
499 SDValue CopyFromHi = DAG.getCopyFromReg(InChain, dl,
501 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), CopyFromHi);
507 static Mips::CondCode FPCondCCodeToFCC(ISD::CondCode CC) {
509 default: llvm_unreachable("Unknown fp condition code!");
511 case ISD::SETOEQ: return Mips::FCOND_OEQ;
512 case ISD::SETUNE: return Mips::FCOND_UNE;
514 case ISD::SETOLT: return Mips::FCOND_OLT;
516 case ISD::SETOGT: return Mips::FCOND_OGT;
518 case ISD::SETOLE: return Mips::FCOND_OLE;
520 case ISD::SETOGE: return Mips::FCOND_OGE;
521 case ISD::SETULT: return Mips::FCOND_ULT;
522 case ISD::SETULE: return Mips::FCOND_ULE;
523 case ISD::SETUGT: return Mips::FCOND_UGT;
524 case ISD::SETUGE: return Mips::FCOND_UGE;
525 case ISD::SETUO: return Mips::FCOND_UN;
526 case ISD::SETO: return Mips::FCOND_OR;
528 case ISD::SETONE: return Mips::FCOND_ONE;
529 case ISD::SETUEQ: return Mips::FCOND_UEQ;
534 // Returns true if condition code has to be inverted.
535 static bool InvertFPCondCode(Mips::CondCode CC) {
536 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
539 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
540 "Illegal Condition Code");
545 // Creates and returns an FPCmp node from a setcc node.
546 // Returns Op if setcc is not a floating point comparison.
547 static SDValue CreateFPCmp(SelectionDAG& DAG, const SDValue& Op) {
548 // must be a SETCC node
549 if (Op.getOpcode() != ISD::SETCC)
552 SDValue LHS = Op.getOperand(0);
554 if (!LHS.getValueType().isFloatingPoint())
557 SDValue RHS = Op.getOperand(1);
558 DebugLoc dl = Op.getDebugLoc();
560 // Assume the 3rd operand is a CondCodeSDNode. Add code to check the type of
561 // node if necessary.
562 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
564 return DAG.getNode(MipsISD::FPCmp, dl, MVT::Glue, LHS, RHS,
565 DAG.getConstant(FPCondCCodeToFCC(CC), MVT::i32));
568 // Creates and returns a CMovFPT/F node.
569 static SDValue CreateCMovFP(SelectionDAG& DAG, SDValue Cond, SDValue True,
570 SDValue False, DebugLoc DL) {
571 bool invert = InvertFPCondCode((Mips::CondCode)
572 cast<ConstantSDNode>(Cond.getOperand(2))
575 return DAG.getNode((invert ? MipsISD::CMovFP_F : MipsISD::CMovFP_T), DL,
576 True.getValueType(), True, False, Cond);
579 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG& DAG,
580 TargetLowering::DAGCombinerInfo &DCI,
581 const MipsSubtarget* Subtarget) {
582 if (DCI.isBeforeLegalizeOps())
585 SDValue SetCC = N->getOperand(0);
587 if ((SetCC.getOpcode() != ISD::SETCC) ||
588 !SetCC.getOperand(0).getValueType().isInteger())
591 SDValue False = N->getOperand(2);
592 EVT FalseTy = False.getValueType();
594 if (!FalseTy.isInteger())
597 ConstantSDNode *CN = dyn_cast<ConstantSDNode>(False);
599 if (!CN || CN->getZExtValue())
602 const DebugLoc DL = N->getDebugLoc();
603 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
604 SDValue True = N->getOperand(1);
606 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
607 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
609 return DAG.getNode(ISD::SELECT, DL, FalseTy, SetCC, False, True);
612 static SDValue PerformANDCombine(SDNode *N, SelectionDAG& DAG,
613 TargetLowering::DAGCombinerInfo &DCI,
614 const MipsSubtarget* Subtarget) {
615 // Pattern match EXT.
616 // $dst = and ((sra or srl) $src , pos), (2**size - 1)
617 // => ext $dst, $src, size, pos
618 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
621 SDValue ShiftRight = N->getOperand(0), Mask = N->getOperand(1);
622 unsigned ShiftRightOpc = ShiftRight.getOpcode();
624 // Op's first operand must be a shift right.
625 if (ShiftRightOpc != ISD::SRA && ShiftRightOpc != ISD::SRL)
628 // The second operand of the shift must be an immediate.
630 if (!(CN = dyn_cast<ConstantSDNode>(ShiftRight.getOperand(1))))
633 uint64_t Pos = CN->getZExtValue();
634 uint64_t SMPos, SMSize;
636 // Op's second operand must be a shifted mask.
637 if (!(CN = dyn_cast<ConstantSDNode>(Mask)) ||
638 !IsShiftedMask(CN->getZExtValue(), SMPos, SMSize))
641 // Return if the shifted mask does not start at bit 0 or the sum of its size
642 // and Pos exceeds the word's size.
643 EVT ValTy = N->getValueType(0);
644 if (SMPos != 0 || Pos + SMSize > ValTy.getSizeInBits())
647 return DAG.getNode(MipsISD::Ext, N->getDebugLoc(), ValTy,
648 ShiftRight.getOperand(0), DAG.getConstant(Pos, MVT::i32),
649 DAG.getConstant(SMSize, MVT::i32));
652 static SDValue PerformORCombine(SDNode *N, SelectionDAG& DAG,
653 TargetLowering::DAGCombinerInfo &DCI,
654 const MipsSubtarget* Subtarget) {
655 // Pattern match INS.
656 // $dst = or (and $src1 , mask0), (and (shl $src, pos), mask1),
657 // where mask1 = (2**size - 1) << pos, mask0 = ~mask1
658 // => ins $dst, $src, size, pos, $src1
659 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
662 SDValue And0 = N->getOperand(0), And1 = N->getOperand(1);
663 uint64_t SMPos0, SMSize0, SMPos1, SMSize1;
666 // See if Op's first operand matches (and $src1 , mask0).
667 if (And0.getOpcode() != ISD::AND)
670 if (!(CN = dyn_cast<ConstantSDNode>(And0.getOperand(1))) ||
671 !IsShiftedMask(~CN->getSExtValue(), SMPos0, SMSize0))
674 // See if Op's second operand matches (and (shl $src, pos), mask1).
675 if (And1.getOpcode() != ISD::AND)
678 if (!(CN = dyn_cast<ConstantSDNode>(And1.getOperand(1))) ||
679 !IsShiftedMask(CN->getZExtValue(), SMPos1, SMSize1))
682 // The shift masks must have the same position and size.
683 if (SMPos0 != SMPos1 || SMSize0 != SMSize1)
686 SDValue Shl = And1.getOperand(0);
687 if (Shl.getOpcode() != ISD::SHL)
690 if (!(CN = dyn_cast<ConstantSDNode>(Shl.getOperand(1))))
693 unsigned Shamt = CN->getZExtValue();
695 // Return if the shift amount and the first bit position of mask are not the
697 EVT ValTy = N->getValueType(0);
698 if ((Shamt != SMPos0) || (SMPos0 + SMSize0 > ValTy.getSizeInBits()))
701 return DAG.getNode(MipsISD::Ins, N->getDebugLoc(), ValTy, Shl.getOperand(0),
702 DAG.getConstant(SMPos0, MVT::i32),
703 DAG.getConstant(SMSize0, MVT::i32), And0.getOperand(0));
706 SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI)
708 SelectionDAG &DAG = DCI.DAG;
709 unsigned opc = N->getOpcode();
714 return PerformADDECombine(N, DAG, DCI, Subtarget);
716 return PerformSUBECombine(N, DAG, DCI, Subtarget);
719 return PerformDivRemCombine(N, DAG, DCI, Subtarget);
721 return PerformSELECTCombine(N, DAG, DCI, Subtarget);
723 return PerformANDCombine(N, DAG, DCI, Subtarget);
725 return PerformORCombine(N, DAG, DCI, Subtarget);
731 SDValue MipsTargetLowering::
732 LowerOperation(SDValue Op, SelectionDAG &DAG) const
734 switch (Op.getOpcode())
736 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
737 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
738 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
739 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
740 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
741 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
742 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
743 case ISD::SELECT: return LowerSELECT(Op, DAG);
744 case ISD::SETCC: return LowerSETCC(Op, DAG);
745 case ISD::VASTART: return LowerVASTART(Op, DAG);
746 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
747 case ISD::FABS: return LowerFABS(Op, DAG);
748 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
749 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG);
750 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG);
755 //===----------------------------------------------------------------------===//
756 // Lower helper functions
757 //===----------------------------------------------------------------------===//
759 // AddLiveIn - This helper function adds the specified physical register to the
760 // MachineFunction as a live in value. It also creates a corresponding
761 // virtual register for it.
763 AddLiveIn(MachineFunction &MF, unsigned PReg, const TargetRegisterClass *RC)
765 assert(RC->contains(PReg) && "Not the correct regclass!");
766 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
767 MF.getRegInfo().addLiveIn(PReg, VReg);
771 // Get fp branch code (not opcode) from condition code.
772 static Mips::FPBranchCode GetFPBranchCodeFromCond(Mips::CondCode CC) {
773 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
774 return Mips::BRANCH_T;
776 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
777 "Invalid CondCode.");
779 return Mips::BRANCH_F;
783 static MachineBasicBlock* ExpandCondMov(MachineInstr *MI, MachineBasicBlock *BB,
785 const MipsSubtarget* Subtarget,
786 const TargetInstrInfo *TII,
787 bool isFPCmp, unsigned Opc) {
788 // There is no need to expand CMov instructions if target has
789 // conditional moves.
790 if (Subtarget->hasCondMov())
793 // To "insert" a SELECT_CC instruction, we actually have to insert the
794 // diamond control-flow pattern. The incoming instruction knows the
795 // destination vreg to set, the condition code register to branch on, the
796 // true/false values to select between, and a branch opcode to use.
797 const BasicBlock *LLVM_BB = BB->getBasicBlock();
798 MachineFunction::iterator It = BB;
805 // bNE r1, r0, copy1MBB
806 // fallthrough --> copy0MBB
807 MachineBasicBlock *thisMBB = BB;
808 MachineFunction *F = BB->getParent();
809 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
810 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
811 F->insert(It, copy0MBB);
812 F->insert(It, sinkMBB);
814 // Transfer the remainder of BB and its successor edges to sinkMBB.
815 sinkMBB->splice(sinkMBB->begin(), BB,
816 llvm::next(MachineBasicBlock::iterator(MI)),
818 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
820 // Next, add the true and fallthrough blocks as its successors.
821 BB->addSuccessor(copy0MBB);
822 BB->addSuccessor(sinkMBB);
824 // Emit the right instruction according to the type of the operands compared
826 BuildMI(BB, dl, TII->get(Opc)).addMBB(sinkMBB);
828 BuildMI(BB, dl, TII->get(Opc)).addReg(MI->getOperand(2).getReg())
829 .addReg(Mips::ZERO).addMBB(sinkMBB);
833 // # fallthrough to sinkMBB
836 // Update machine-CFG edges
837 BB->addSuccessor(sinkMBB);
840 // %Result = phi [ %TrueValue, thisMBB ], [ %FalseValue, copy0MBB ]
845 BuildMI(*BB, BB->begin(), dl,
846 TII->get(Mips::PHI), MI->getOperand(0).getReg())
847 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB)
848 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB);
850 BuildMI(*BB, BB->begin(), dl,
851 TII->get(Mips::PHI), MI->getOperand(0).getReg())
852 .addReg(MI->getOperand(3).getReg()).addMBB(thisMBB)
853 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB);
855 MI->eraseFromParent(); // The pseudo instruction is gone now.
860 MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
861 MachineBasicBlock *BB) const {
862 switch (MI->getOpcode()) {
863 default: llvm_unreachable("Unexpected instr type to insert");
864 case Mips::ATOMIC_LOAD_ADD_I8:
865 case Mips::ATOMIC_LOAD_ADD_I8_P8:
866 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::ADDu);
867 case Mips::ATOMIC_LOAD_ADD_I16:
868 case Mips::ATOMIC_LOAD_ADD_I16_P8:
869 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::ADDu);
870 case Mips::ATOMIC_LOAD_ADD_I32:
871 case Mips::ATOMIC_LOAD_ADD_I32_P8:
872 return EmitAtomicBinary(MI, BB, 4, Mips::ADDu);
873 case Mips::ATOMIC_LOAD_ADD_I64:
874 case Mips::ATOMIC_LOAD_ADD_I64_P8:
875 return EmitAtomicBinary(MI, BB, 8, Mips::DADDu);
877 case Mips::ATOMIC_LOAD_AND_I8:
878 case Mips::ATOMIC_LOAD_AND_I8_P8:
879 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::AND);
880 case Mips::ATOMIC_LOAD_AND_I16:
881 case Mips::ATOMIC_LOAD_AND_I16_P8:
882 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::AND);
883 case Mips::ATOMIC_LOAD_AND_I32:
884 case Mips::ATOMIC_LOAD_AND_I32_P8:
885 return EmitAtomicBinary(MI, BB, 4, Mips::AND);
886 case Mips::ATOMIC_LOAD_AND_I64:
887 case Mips::ATOMIC_LOAD_AND_I64_P8:
888 return EmitAtomicBinary(MI, BB, 8, Mips::AND64);
890 case Mips::ATOMIC_LOAD_OR_I8:
891 case Mips::ATOMIC_LOAD_OR_I8_P8:
892 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::OR);
893 case Mips::ATOMIC_LOAD_OR_I16:
894 case Mips::ATOMIC_LOAD_OR_I16_P8:
895 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::OR);
896 case Mips::ATOMIC_LOAD_OR_I32:
897 case Mips::ATOMIC_LOAD_OR_I32_P8:
898 return EmitAtomicBinary(MI, BB, 4, Mips::OR);
899 case Mips::ATOMIC_LOAD_OR_I64:
900 case Mips::ATOMIC_LOAD_OR_I64_P8:
901 return EmitAtomicBinary(MI, BB, 8, Mips::OR64);
903 case Mips::ATOMIC_LOAD_XOR_I8:
904 case Mips::ATOMIC_LOAD_XOR_I8_P8:
905 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::XOR);
906 case Mips::ATOMIC_LOAD_XOR_I16:
907 case Mips::ATOMIC_LOAD_XOR_I16_P8:
908 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::XOR);
909 case Mips::ATOMIC_LOAD_XOR_I32:
910 case Mips::ATOMIC_LOAD_XOR_I32_P8:
911 return EmitAtomicBinary(MI, BB, 4, Mips::XOR);
912 case Mips::ATOMIC_LOAD_XOR_I64:
913 case Mips::ATOMIC_LOAD_XOR_I64_P8:
914 return EmitAtomicBinary(MI, BB, 8, Mips::XOR64);
916 case Mips::ATOMIC_LOAD_NAND_I8:
917 case Mips::ATOMIC_LOAD_NAND_I8_P8:
918 return EmitAtomicBinaryPartword(MI, BB, 1, 0, true);
919 case Mips::ATOMIC_LOAD_NAND_I16:
920 case Mips::ATOMIC_LOAD_NAND_I16_P8:
921 return EmitAtomicBinaryPartword(MI, BB, 2, 0, true);
922 case Mips::ATOMIC_LOAD_NAND_I32:
923 case Mips::ATOMIC_LOAD_NAND_I32_P8:
924 return EmitAtomicBinary(MI, BB, 4, 0, true);
925 case Mips::ATOMIC_LOAD_NAND_I64:
926 case Mips::ATOMIC_LOAD_NAND_I64_P8:
927 return EmitAtomicBinary(MI, BB, 8, 0, true);
929 case Mips::ATOMIC_LOAD_SUB_I8:
930 case Mips::ATOMIC_LOAD_SUB_I8_P8:
931 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::SUBu);
932 case Mips::ATOMIC_LOAD_SUB_I16:
933 case Mips::ATOMIC_LOAD_SUB_I16_P8:
934 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::SUBu);
935 case Mips::ATOMIC_LOAD_SUB_I32:
936 case Mips::ATOMIC_LOAD_SUB_I32_P8:
937 return EmitAtomicBinary(MI, BB, 4, Mips::SUBu);
938 case Mips::ATOMIC_LOAD_SUB_I64:
939 case Mips::ATOMIC_LOAD_SUB_I64_P8:
940 return EmitAtomicBinary(MI, BB, 8, Mips::DSUBu);
942 case Mips::ATOMIC_SWAP_I8:
943 case Mips::ATOMIC_SWAP_I8_P8:
944 return EmitAtomicBinaryPartword(MI, BB, 1, 0);
945 case Mips::ATOMIC_SWAP_I16:
946 case Mips::ATOMIC_SWAP_I16_P8:
947 return EmitAtomicBinaryPartword(MI, BB, 2, 0);
948 case Mips::ATOMIC_SWAP_I32:
949 case Mips::ATOMIC_SWAP_I32_P8:
950 return EmitAtomicBinary(MI, BB, 4, 0);
951 case Mips::ATOMIC_SWAP_I64:
952 case Mips::ATOMIC_SWAP_I64_P8:
953 return EmitAtomicBinary(MI, BB, 8, 0);
955 case Mips::ATOMIC_CMP_SWAP_I8:
956 case Mips::ATOMIC_CMP_SWAP_I8_P8:
957 return EmitAtomicCmpSwapPartword(MI, BB, 1);
958 case Mips::ATOMIC_CMP_SWAP_I16:
959 case Mips::ATOMIC_CMP_SWAP_I16_P8:
960 return EmitAtomicCmpSwapPartword(MI, BB, 2);
961 case Mips::ATOMIC_CMP_SWAP_I32:
962 case Mips::ATOMIC_CMP_SWAP_I32_P8:
963 return EmitAtomicCmpSwap(MI, BB, 4);
964 case Mips::ATOMIC_CMP_SWAP_I64:
965 case Mips::ATOMIC_CMP_SWAP_I64_P8:
966 return EmitAtomicCmpSwap(MI, BB, 8);
970 // This function also handles Mips::ATOMIC_SWAP_I32 (when BinOpcode == 0), and
971 // Mips::ATOMIC_LOAD_NAND_I32 (when Nand == true)
973 MipsTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
974 unsigned Size, unsigned BinOpcode,
976 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicBinary.");
978 MachineFunction *MF = BB->getParent();
979 MachineRegisterInfo &RegInfo = MF->getRegInfo();
980 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
981 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
982 DebugLoc dl = MI->getDebugLoc();
983 unsigned LL, SC, AND, NOR, ZERO, BEQ;
986 LL = IsN64 ? Mips::LL_P8 : Mips::LL;
987 SC = IsN64 ? Mips::SC_P8 : Mips::SC;
994 LL = IsN64 ? Mips::LLD_P8 : Mips::LLD;
995 SC = IsN64 ? Mips::SCD_P8 : Mips::SCD;
998 ZERO = Mips::ZERO_64;
1002 unsigned OldVal = MI->getOperand(0).getReg();
1003 unsigned Ptr = MI->getOperand(1).getReg();
1004 unsigned Incr = MI->getOperand(2).getReg();
1006 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1007 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1008 unsigned Success = RegInfo.createVirtualRegister(RC);
1010 // insert new blocks after the current block
1011 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1012 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1013 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1014 MachineFunction::iterator It = BB;
1016 MF->insert(It, loopMBB);
1017 MF->insert(It, exitMBB);
1019 // Transfer the remainder of BB and its successor edges to exitMBB.
1020 exitMBB->splice(exitMBB->begin(), BB,
1021 llvm::next(MachineBasicBlock::iterator(MI)),
1023 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1027 // fallthrough --> loopMBB
1028 BB->addSuccessor(loopMBB);
1029 loopMBB->addSuccessor(loopMBB);
1030 loopMBB->addSuccessor(exitMBB);
1033 // ll oldval, 0(ptr)
1034 // <binop> storeval, oldval, incr
1035 // sc success, storeval, 0(ptr)
1036 // beq success, $0, loopMBB
1038 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(Ptr).addImm(0);
1040 // and andres, oldval, incr
1041 // nor storeval, $0, andres
1042 BuildMI(BB, dl, TII->get(AND), AndRes).addReg(OldVal).addReg(Incr);
1043 BuildMI(BB, dl, TII->get(NOR), StoreVal).addReg(ZERO).addReg(AndRes);
1044 } else if (BinOpcode) {
1045 // <binop> storeval, oldval, incr
1046 BuildMI(BB, dl, TII->get(BinOpcode), StoreVal).addReg(OldVal).addReg(Incr);
1050 BuildMI(BB, dl, TII->get(SC), Success).addReg(StoreVal).addReg(Ptr).addImm(0);
1051 BuildMI(BB, dl, TII->get(BEQ)).addReg(Success).addReg(ZERO).addMBB(loopMBB);
1053 MI->eraseFromParent(); // The instruction is gone now.
1059 MipsTargetLowering::EmitAtomicBinaryPartword(MachineInstr *MI,
1060 MachineBasicBlock *BB,
1061 unsigned Size, unsigned BinOpcode,
1063 assert((Size == 1 || Size == 2) &&
1064 "Unsupported size for EmitAtomicBinaryPartial.");
1066 MachineFunction *MF = BB->getParent();
1067 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1068 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1069 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1070 DebugLoc dl = MI->getDebugLoc();
1071 unsigned LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1072 unsigned SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1074 unsigned Dest = MI->getOperand(0).getReg();
1075 unsigned Ptr = MI->getOperand(1).getReg();
1076 unsigned Incr = MI->getOperand(2).getReg();
1078 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1079 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1080 unsigned Mask = RegInfo.createVirtualRegister(RC);
1081 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1082 unsigned NewVal = RegInfo.createVirtualRegister(RC);
1083 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1084 unsigned Incr2 = RegInfo.createVirtualRegister(RC);
1085 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1086 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1087 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1088 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1089 unsigned BinOpRes = RegInfo.createVirtualRegister(RC);
1090 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1091 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1092 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1093 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1094 unsigned SllRes = RegInfo.createVirtualRegister(RC);
1095 unsigned Success = RegInfo.createVirtualRegister(RC);
1097 // insert new blocks after the current block
1098 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1099 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1100 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1101 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1102 MachineFunction::iterator It = BB;
1104 MF->insert(It, loopMBB);
1105 MF->insert(It, sinkMBB);
1106 MF->insert(It, exitMBB);
1108 // Transfer the remainder of BB and its successor edges to exitMBB.
1109 exitMBB->splice(exitMBB->begin(), BB,
1110 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1111 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1113 BB->addSuccessor(loopMBB);
1114 loopMBB->addSuccessor(loopMBB);
1115 loopMBB->addSuccessor(sinkMBB);
1116 sinkMBB->addSuccessor(exitMBB);
1119 // addiu masklsb2,$0,-4 # 0xfffffffc
1120 // and alignedaddr,ptr,masklsb2
1121 // andi ptrlsb2,ptr,3
1122 // sll shiftamt,ptrlsb2,3
1123 // ori maskupper,$0,255 # 0xff
1124 // sll mask,maskupper,shiftamt
1125 // nor mask2,$0,mask
1126 // sll incr2,incr,shiftamt
1128 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1129 BuildMI(BB, dl, TII->get(Mips::ADDiu), MaskLSB2)
1130 .addReg(Mips::ZERO).addImm(-4);
1131 BuildMI(BB, dl, TII->get(Mips::AND), AlignedAddr)
1132 .addReg(Ptr).addReg(MaskLSB2);
1133 BuildMI(BB, dl, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1134 BuildMI(BB, dl, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1135 BuildMI(BB, dl, TII->get(Mips::ORi), MaskUpper)
1136 .addReg(Mips::ZERO).addImm(MaskImm);
1137 BuildMI(BB, dl, TII->get(Mips::SLLV), Mask)
1138 .addReg(ShiftAmt).addReg(MaskUpper);
1139 BuildMI(BB, dl, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1140 BuildMI(BB, dl, TII->get(Mips::SLLV), Incr2).addReg(ShiftAmt).addReg(Incr);
1142 // atomic.load.binop
1144 // ll oldval,0(alignedaddr)
1145 // binop binopres,oldval,incr2
1146 // and newval,binopres,mask
1147 // and maskedoldval0,oldval,mask2
1148 // or storeval,maskedoldval0,newval
1149 // sc success,storeval,0(alignedaddr)
1150 // beq success,$0,loopMBB
1154 // ll oldval,0(alignedaddr)
1155 // and newval,incr2,mask
1156 // and maskedoldval0,oldval,mask2
1157 // or storeval,maskedoldval0,newval
1158 // sc success,storeval,0(alignedaddr)
1159 // beq success,$0,loopMBB
1162 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(AlignedAddr).addImm(0);
1164 // and andres, oldval, incr2
1165 // nor binopres, $0, andres
1166 // and newval, binopres, mask
1167 BuildMI(BB, dl, TII->get(Mips::AND), AndRes).addReg(OldVal).addReg(Incr2);
1168 BuildMI(BB, dl, TII->get(Mips::NOR), BinOpRes)
1169 .addReg(Mips::ZERO).addReg(AndRes);
1170 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1171 } else if (BinOpcode) {
1172 // <binop> binopres, oldval, incr2
1173 // and newval, binopres, mask
1174 BuildMI(BB, dl, TII->get(BinOpcode), BinOpRes).addReg(OldVal).addReg(Incr2);
1175 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1176 } else {// atomic.swap
1177 // and newval, incr2, mask
1178 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(Incr2).addReg(Mask);
1181 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal0)
1182 .addReg(OldVal).addReg(Mask2);
1183 BuildMI(BB, dl, TII->get(Mips::OR), StoreVal)
1184 .addReg(MaskedOldVal0).addReg(NewVal);
1185 BuildMI(BB, dl, TII->get(SC), Success)
1186 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1187 BuildMI(BB, dl, TII->get(Mips::BEQ))
1188 .addReg(Success).addReg(Mips::ZERO).addMBB(loopMBB);
1191 // and maskedoldval1,oldval,mask
1192 // srl srlres,maskedoldval1,shiftamt
1193 // sll sllres,srlres,24
1194 // sra dest,sllres,24
1196 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1198 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal1)
1199 .addReg(OldVal).addReg(Mask);
1200 BuildMI(BB, dl, TII->get(Mips::SRLV), SrlRes)
1201 .addReg(ShiftAmt).addReg(MaskedOldVal1);
1202 BuildMI(BB, dl, TII->get(Mips::SLL), SllRes)
1203 .addReg(SrlRes).addImm(ShiftImm);
1204 BuildMI(BB, dl, TII->get(Mips::SRA), Dest)
1205 .addReg(SllRes).addImm(ShiftImm);
1207 MI->eraseFromParent(); // The instruction is gone now.
1213 MipsTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
1214 MachineBasicBlock *BB,
1215 unsigned Size) const {
1216 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicCmpSwap.");
1218 MachineFunction *MF = BB->getParent();
1219 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1220 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
1221 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1222 DebugLoc dl = MI->getDebugLoc();
1223 unsigned LL, SC, ZERO, BNE, BEQ;
1226 LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1227 SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1233 LL = IsN64 ? Mips::LLD_P8 : Mips::LLD;
1234 SC = IsN64 ? Mips::SCD_P8 : Mips::SCD;
1235 ZERO = Mips::ZERO_64;
1240 unsigned Dest = MI->getOperand(0).getReg();
1241 unsigned Ptr = MI->getOperand(1).getReg();
1242 unsigned OldVal = MI->getOperand(2).getReg();
1243 unsigned NewVal = MI->getOperand(3).getReg();
1245 unsigned Success = RegInfo.createVirtualRegister(RC);
1247 // insert new blocks after the current block
1248 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1249 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1250 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1251 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1252 MachineFunction::iterator It = BB;
1254 MF->insert(It, loop1MBB);
1255 MF->insert(It, loop2MBB);
1256 MF->insert(It, exitMBB);
1258 // Transfer the remainder of BB and its successor edges to exitMBB.
1259 exitMBB->splice(exitMBB->begin(), BB,
1260 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1261 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1265 // fallthrough --> loop1MBB
1266 BB->addSuccessor(loop1MBB);
1267 loop1MBB->addSuccessor(exitMBB);
1268 loop1MBB->addSuccessor(loop2MBB);
1269 loop2MBB->addSuccessor(loop1MBB);
1270 loop2MBB->addSuccessor(exitMBB);
1274 // bne dest, oldval, exitMBB
1276 BuildMI(BB, dl, TII->get(LL), Dest).addReg(Ptr).addImm(0);
1277 BuildMI(BB, dl, TII->get(BNE))
1278 .addReg(Dest).addReg(OldVal).addMBB(exitMBB);
1281 // sc success, newval, 0(ptr)
1282 // beq success, $0, loop1MBB
1284 BuildMI(BB, dl, TII->get(SC), Success)
1285 .addReg(NewVal).addReg(Ptr).addImm(0);
1286 BuildMI(BB, dl, TII->get(BEQ))
1287 .addReg(Success).addReg(ZERO).addMBB(loop1MBB);
1289 MI->eraseFromParent(); // The instruction is gone now.
1295 MipsTargetLowering::EmitAtomicCmpSwapPartword(MachineInstr *MI,
1296 MachineBasicBlock *BB,
1297 unsigned Size) const {
1298 assert((Size == 1 || Size == 2) &&
1299 "Unsupported size for EmitAtomicCmpSwapPartial.");
1301 MachineFunction *MF = BB->getParent();
1302 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1303 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1304 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1305 DebugLoc dl = MI->getDebugLoc();
1306 unsigned LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1307 unsigned SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1309 unsigned Dest = MI->getOperand(0).getReg();
1310 unsigned Ptr = MI->getOperand(1).getReg();
1311 unsigned CmpVal = MI->getOperand(2).getReg();
1312 unsigned NewVal = MI->getOperand(3).getReg();
1314 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1315 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1316 unsigned Mask = RegInfo.createVirtualRegister(RC);
1317 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1318 unsigned ShiftedCmpVal = RegInfo.createVirtualRegister(RC);
1319 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1320 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1321 unsigned ShiftedNewVal = RegInfo.createVirtualRegister(RC);
1322 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1323 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1324 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1325 unsigned MaskedCmpVal = RegInfo.createVirtualRegister(RC);
1326 unsigned MaskedNewVal = RegInfo.createVirtualRegister(RC);
1327 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1328 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1329 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1330 unsigned SllRes = RegInfo.createVirtualRegister(RC);
1331 unsigned Success = RegInfo.createVirtualRegister(RC);
1333 // insert new blocks after the current block
1334 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1335 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1336 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1337 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1338 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1339 MachineFunction::iterator It = BB;
1341 MF->insert(It, loop1MBB);
1342 MF->insert(It, loop2MBB);
1343 MF->insert(It, sinkMBB);
1344 MF->insert(It, exitMBB);
1346 // Transfer the remainder of BB and its successor edges to exitMBB.
1347 exitMBB->splice(exitMBB->begin(), BB,
1348 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1349 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1351 BB->addSuccessor(loop1MBB);
1352 loop1MBB->addSuccessor(sinkMBB);
1353 loop1MBB->addSuccessor(loop2MBB);
1354 loop2MBB->addSuccessor(loop1MBB);
1355 loop2MBB->addSuccessor(sinkMBB);
1356 sinkMBB->addSuccessor(exitMBB);
1358 // FIXME: computation of newval2 can be moved to loop2MBB.
1360 // addiu masklsb2,$0,-4 # 0xfffffffc
1361 // and alignedaddr,ptr,masklsb2
1362 // andi ptrlsb2,ptr,3
1363 // sll shiftamt,ptrlsb2,3
1364 // ori maskupper,$0,255 # 0xff
1365 // sll mask,maskupper,shiftamt
1366 // nor mask2,$0,mask
1367 // andi maskedcmpval,cmpval,255
1368 // sll shiftedcmpval,maskedcmpval,shiftamt
1369 // andi maskednewval,newval,255
1370 // sll shiftednewval,maskednewval,shiftamt
1371 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1372 BuildMI(BB, dl, TII->get(Mips::ADDiu), MaskLSB2)
1373 .addReg(Mips::ZERO).addImm(-4);
1374 BuildMI(BB, dl, TII->get(Mips::AND), AlignedAddr)
1375 .addReg(Ptr).addReg(MaskLSB2);
1376 BuildMI(BB, dl, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1377 BuildMI(BB, dl, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1378 BuildMI(BB, dl, TII->get(Mips::ORi), MaskUpper)
1379 .addReg(Mips::ZERO).addImm(MaskImm);
1380 BuildMI(BB, dl, TII->get(Mips::SLLV), Mask)
1381 .addReg(ShiftAmt).addReg(MaskUpper);
1382 BuildMI(BB, dl, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1383 BuildMI(BB, dl, TII->get(Mips::ANDi), MaskedCmpVal)
1384 .addReg(CmpVal).addImm(MaskImm);
1385 BuildMI(BB, dl, TII->get(Mips::SLLV), ShiftedCmpVal)
1386 .addReg(ShiftAmt).addReg(MaskedCmpVal);
1387 BuildMI(BB, dl, TII->get(Mips::ANDi), MaskedNewVal)
1388 .addReg(NewVal).addImm(MaskImm);
1389 BuildMI(BB, dl, TII->get(Mips::SLLV), ShiftedNewVal)
1390 .addReg(ShiftAmt).addReg(MaskedNewVal);
1393 // ll oldval,0(alginedaddr)
1394 // and maskedoldval0,oldval,mask
1395 // bne maskedoldval0,shiftedcmpval,sinkMBB
1397 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(AlignedAddr).addImm(0);
1398 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal0)
1399 .addReg(OldVal).addReg(Mask);
1400 BuildMI(BB, dl, TII->get(Mips::BNE))
1401 .addReg(MaskedOldVal0).addReg(ShiftedCmpVal).addMBB(sinkMBB);
1404 // and maskedoldval1,oldval,mask2
1405 // or storeval,maskedoldval1,shiftednewval
1406 // sc success,storeval,0(alignedaddr)
1407 // beq success,$0,loop1MBB
1409 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal1)
1410 .addReg(OldVal).addReg(Mask2);
1411 BuildMI(BB, dl, TII->get(Mips::OR), StoreVal)
1412 .addReg(MaskedOldVal1).addReg(ShiftedNewVal);
1413 BuildMI(BB, dl, TII->get(SC), Success)
1414 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1415 BuildMI(BB, dl, TII->get(Mips::BEQ))
1416 .addReg(Success).addReg(Mips::ZERO).addMBB(loop1MBB);
1419 // srl srlres,maskedoldval0,shiftamt
1420 // sll sllres,srlres,24
1421 // sra dest,sllres,24
1423 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1425 BuildMI(BB, dl, TII->get(Mips::SRLV), SrlRes)
1426 .addReg(ShiftAmt).addReg(MaskedOldVal0);
1427 BuildMI(BB, dl, TII->get(Mips::SLL), SllRes)
1428 .addReg(SrlRes).addImm(ShiftImm);
1429 BuildMI(BB, dl, TII->get(Mips::SRA), Dest)
1430 .addReg(SllRes).addImm(ShiftImm);
1432 MI->eraseFromParent(); // The instruction is gone now.
1437 //===----------------------------------------------------------------------===//
1438 // Misc Lower Operation implementation
1439 //===----------------------------------------------------------------------===//
1440 SDValue MipsTargetLowering::
1441 LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const
1443 MachineFunction &MF = DAG.getMachineFunction();
1444 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
1445 unsigned SP = IsN64 ? Mips::SP_64 : Mips::SP;
1447 assert(getTargetMachine().getFrameLowering()->getStackAlignment() >=
1448 cast<ConstantSDNode>(Op.getOperand(2).getNode())->getZExtValue() &&
1449 "Cannot lower if the alignment of the allocated space is larger than \
1450 that of the stack.");
1452 SDValue Chain = Op.getOperand(0);
1453 SDValue Size = Op.getOperand(1);
1454 DebugLoc dl = Op.getDebugLoc();
1456 // Get a reference from Mips stack pointer
1457 SDValue StackPointer = DAG.getCopyFromReg(Chain, dl, SP, getPointerTy());
1459 // Subtract the dynamic size from the actual stack size to
1460 // obtain the new stack size.
1461 SDValue Sub = DAG.getNode(ISD::SUB, dl, getPointerTy(), StackPointer, Size);
1463 // The Sub result contains the new stack start address, so it
1464 // must be placed in the stack pointer register.
1465 Chain = DAG.getCopyToReg(StackPointer.getValue(1), dl, SP, Sub, SDValue());
1467 // This node always has two return values: a new stack pointer
1468 // value and a chain
1469 SDVTList VTLs = DAG.getVTList(getPointerTy(), MVT::Other);
1470 SDValue Ptr = DAG.getFrameIndex(MipsFI->getDynAllocFI(), getPointerTy());
1471 SDValue Ops[] = { Chain, Ptr, Chain.getValue(1) };
1473 return DAG.getNode(MipsISD::DynAlloc, dl, VTLs, Ops, 3);
1476 SDValue MipsTargetLowering::
1477 LowerBRCOND(SDValue Op, SelectionDAG &DAG) const
1479 // The first operand is the chain, the second is the condition, the third is
1480 // the block to branch to if the condition is true.
1481 SDValue Chain = Op.getOperand(0);
1482 SDValue Dest = Op.getOperand(2);
1483 DebugLoc dl = Op.getDebugLoc();
1485 SDValue CondRes = CreateFPCmp(DAG, Op.getOperand(1));
1487 // Return if flag is not set by a floating point comparison.
1488 if (CondRes.getOpcode() != MipsISD::FPCmp)
1491 SDValue CCNode = CondRes.getOperand(2);
1493 (Mips::CondCode)cast<ConstantSDNode>(CCNode)->getZExtValue();
1494 SDValue BrCode = DAG.getConstant(GetFPBranchCodeFromCond(CC), MVT::i32);
1496 return DAG.getNode(MipsISD::FPBrcond, dl, Op.getValueType(), Chain, BrCode,
1500 SDValue MipsTargetLowering::
1501 LowerSELECT(SDValue Op, SelectionDAG &DAG) const
1503 SDValue Cond = CreateFPCmp(DAG, Op.getOperand(0));
1505 // Return if flag is not set by a floating point comparison.
1506 if (Cond.getOpcode() != MipsISD::FPCmp)
1509 return CreateCMovFP(DAG, Cond, Op.getOperand(1), Op.getOperand(2),
1513 SDValue MipsTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1514 SDValue Cond = CreateFPCmp(DAG, Op);
1516 assert(Cond.getOpcode() == MipsISD::FPCmp &&
1517 "Floating point operand expected.");
1519 SDValue True = DAG.getConstant(1, MVT::i32);
1520 SDValue False = DAG.getConstant(0, MVT::i32);
1522 return CreateCMovFP(DAG, Cond, True, False, Op.getDebugLoc());
1525 SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
1526 SelectionDAG &DAG) const {
1527 // FIXME there isn't actually debug info here
1528 DebugLoc dl = Op.getDebugLoc();
1529 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
1531 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1532 SDVTList VTs = DAG.getVTList(MVT::i32);
1534 MipsTargetObjectFile &TLOF = (MipsTargetObjectFile&)getObjFileLowering();
1536 // %gp_rel relocation
1537 if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
1538 SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1540 SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, dl, VTs, &GA, 1);
1541 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1542 return DAG.getNode(ISD::ADD, dl, MVT::i32, GOT, GPRelNode);
1544 // %hi/%lo relocation
1545 SDValue GAHi = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1547 SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1549 SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, VTs, &GAHi, 1);
1550 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, GALo);
1551 return DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
1554 EVT ValTy = Op.getValueType();
1555 bool HasGotOfst = (GV->hasInternalLinkage() ||
1556 (GV->hasLocalLinkage() && !isa<Function>(GV)));
1557 unsigned GotFlag = HasMips64 ?
1558 (HasGotOfst ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT_DISP) :
1559 (HasGotOfst ? MipsII::MO_GOT : MipsII::MO_GOT16);
1560 SDValue GA = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0, GotFlag);
1561 GA = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), GA);
1562 SDValue ResNode = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), GA,
1563 MachinePointerInfo(), false, false, false, 0);
1564 // On functions and global targets not internal linked only
1565 // a load from got/GP is necessary for PIC to work.
1568 SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0,
1569 HasMips64 ? MipsII::MO_GOT_OFST :
1571 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, GALo);
1572 return DAG.getNode(ISD::ADD, dl, ValTy, ResNode, Lo);
1575 SDValue MipsTargetLowering::LowerBlockAddress(SDValue Op,
1576 SelectionDAG &DAG) const {
1577 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
1578 // FIXME there isn't actually debug info here
1579 DebugLoc dl = Op.getDebugLoc();
1581 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1582 // %hi/%lo relocation
1583 SDValue BAHi = DAG.getBlockAddress(BA, MVT::i32, true, MipsII::MO_ABS_HI);
1584 SDValue BALo = DAG.getBlockAddress(BA, MVT::i32, true, MipsII::MO_ABS_LO);
1585 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, MVT::i32, BAHi);
1586 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, BALo);
1587 return DAG.getNode(ISD::ADD, dl, MVT::i32, Hi, Lo);
1590 EVT ValTy = Op.getValueType();
1591 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1592 unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1593 SDValue BAGOTOffset = DAG.getBlockAddress(BA, ValTy, true, GOTFlag);
1594 BAGOTOffset = DAG.getNode(MipsISD::Wrapper, dl, ValTy,
1595 GetGlobalReg(DAG, ValTy), BAGOTOffset);
1596 SDValue BALOOffset = DAG.getBlockAddress(BA, ValTy, true, OFSTFlag);
1597 SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), BAGOTOffset,
1598 MachinePointerInfo(), false, false, false, 0);
1599 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, BALOOffset);
1600 return DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
1603 SDValue MipsTargetLowering::
1604 LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
1606 // If the relocation model is PIC, use the General Dynamic TLS Model or
1607 // Local Dynamic TLS model, otherwise use the Initial Exec or
1608 // Local Exec TLS Model.
1610 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1611 DebugLoc dl = GA->getDebugLoc();
1612 const GlobalValue *GV = GA->getGlobal();
1613 EVT PtrVT = getPointerTy();
1615 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
1616 // General Dynamic TLS Model
1617 bool LocalDynamic = GV->hasInternalLinkage();
1618 unsigned Flag = LocalDynamic ? MipsII::MO_TLSLDM :MipsII::MO_TLSGD;
1619 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, Flag);
1620 SDValue Argument = DAG.getNode(MipsISD::Wrapper, dl, PtrVT,
1621 GetGlobalReg(DAG, PtrVT), TGA);
1622 unsigned PtrSize = PtrVT.getSizeInBits();
1623 IntegerType *PtrTy = Type::getIntNTy(*DAG.getContext(), PtrSize);
1625 SDValue TlsGetAddr = DAG.getExternalSymbol("__tls_get_addr", PtrVT);
1629 Entry.Node = Argument;
1631 Args.push_back(Entry);
1633 std::pair<SDValue, SDValue> CallResult =
1634 LowerCallTo(DAG.getEntryNode(), PtrTy,
1635 false, false, false, false, 0, CallingConv::C,
1636 /*isTailCall=*/false, /*doesNotRet=*/false,
1637 /*isReturnValueUsed=*/true,
1638 TlsGetAddr, Args, DAG, dl);
1640 SDValue Ret = CallResult.first;
1645 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1646 MipsII::MO_DTPREL_HI);
1647 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, PtrVT, TGAHi);
1648 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1649 MipsII::MO_DTPREL_LO);
1650 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, TGALo);
1651 SDValue Add = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Ret);
1652 return DAG.getNode(ISD::ADD, dl, PtrVT, Add, Lo);
1656 if (GV->isDeclaration()) {
1657 // Initial Exec TLS Model
1658 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1659 MipsII::MO_GOTTPREL);
1660 TGA = DAG.getNode(MipsISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
1662 Offset = DAG.getLoad(PtrVT, dl,
1663 DAG.getEntryNode(), TGA, MachinePointerInfo(),
1664 false, false, false, 0);
1666 // Local Exec TLS Model
1667 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1668 MipsII::MO_TPREL_HI);
1669 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1670 MipsII::MO_TPREL_LO);
1671 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, PtrVT, TGAHi);
1672 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, TGALo);
1673 Offset = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
1676 SDValue ThreadPointer = DAG.getNode(MipsISD::ThreadPointer, dl, PtrVT);
1677 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
1680 SDValue MipsTargetLowering::
1681 LowerJumpTable(SDValue Op, SelectionDAG &DAG) const
1683 SDValue HiPart, JTI, JTILo;
1684 // FIXME there isn't actually debug info here
1685 DebugLoc dl = Op.getDebugLoc();
1686 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
1687 EVT PtrVT = Op.getValueType();
1688 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
1690 if (!IsPIC && !IsN64) {
1691 JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_HI);
1692 HiPart = DAG.getNode(MipsISD::Hi, dl, PtrVT, JTI);
1693 JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_LO);
1694 } else {// Emit Load from Global Pointer
1695 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1696 unsigned OfstFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1697 JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, GOTFlag);
1698 JTI = DAG.getNode(MipsISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
1700 HiPart = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), JTI,
1701 MachinePointerInfo(), false, false, false, 0);
1702 JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, OfstFlag);
1705 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, JTILo);
1706 return DAG.getNode(ISD::ADD, dl, PtrVT, HiPart, Lo);
1709 SDValue MipsTargetLowering::
1710 LowerConstantPool(SDValue Op, SelectionDAG &DAG) const
1713 ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
1714 const Constant *C = N->getConstVal();
1715 // FIXME there isn't actually debug info here
1716 DebugLoc dl = Op.getDebugLoc();
1718 // gp_rel relocation
1719 // FIXME: we should reference the constant pool using small data sections,
1720 // but the asm printer currently doesn't support this feature without
1721 // hacking it. This feature should come soon so we can uncomment the
1723 //if (IsInSmallSection(C->getType())) {
1724 // SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, MVT::i32, CP);
1725 // SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1726 // ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
1728 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1729 SDValue CPHi = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
1730 N->getOffset(), MipsII::MO_ABS_HI);
1731 SDValue CPLo = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
1732 N->getOffset(), MipsII::MO_ABS_LO);
1733 SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, MVT::i32, CPHi);
1734 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, CPLo);
1735 ResNode = DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
1737 EVT ValTy = Op.getValueType();
1738 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1739 unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1740 SDValue CP = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
1741 N->getOffset(), GOTFlag);
1742 CP = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), CP);
1743 SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), CP,
1744 MachinePointerInfo::getConstantPool(), false,
1746 SDValue CPLo = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
1747 N->getOffset(), OFSTFlag);
1748 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, CPLo);
1749 ResNode = DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
1755 SDValue MipsTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
1756 MachineFunction &MF = DAG.getMachineFunction();
1757 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
1759 DebugLoc dl = Op.getDebugLoc();
1760 SDValue FI = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
1763 // vastart just stores the address of the VarArgsFrameIndex slot into the
1764 // memory location argument.
1765 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1766 return DAG.getStore(Op.getOperand(0), dl, FI, Op.getOperand(1),
1767 MachinePointerInfo(SV), false, false, 0);
1770 static SDValue LowerFCOPYSIGN32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1771 EVT TyX = Op.getOperand(0).getValueType();
1772 EVT TyY = Op.getOperand(1).getValueType();
1773 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1774 SDValue Const31 = DAG.getConstant(31, MVT::i32);
1775 DebugLoc DL = Op.getDebugLoc();
1778 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1780 SDValue X = (TyX == MVT::f32) ?
1781 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1782 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1784 SDValue Y = (TyY == MVT::f32) ?
1785 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(1)) :
1786 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(1),
1790 // ext E, Y, 31, 1 ; extract bit31 of Y
1791 // ins X, E, 31, 1 ; insert extracted bit at bit31 of X
1792 SDValue E = DAG.getNode(MipsISD::Ext, DL, MVT::i32, Y, Const31, Const1);
1793 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32, E, Const31, Const1, X);
1796 // srl SrlX, SllX, 1
1798 // sll SllY, SrlX, 31
1799 // or Or, SrlX, SllY
1800 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1801 SDValue SrlX = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1802 SDValue SrlY = DAG.getNode(ISD::SRL, DL, MVT::i32, Y, Const31);
1803 SDValue SllY = DAG.getNode(ISD::SHL, DL, MVT::i32, SrlY, Const31);
1804 Res = DAG.getNode(ISD::OR, DL, MVT::i32, SrlX, SllY);
1807 if (TyX == MVT::f32)
1808 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Res);
1810 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1811 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1812 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1815 static SDValue LowerFCOPYSIGN64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1816 unsigned WidthX = Op.getOperand(0).getValueSizeInBits();
1817 unsigned WidthY = Op.getOperand(1).getValueSizeInBits();
1818 EVT TyX = MVT::getIntegerVT(WidthX), TyY = MVT::getIntegerVT(WidthY);
1819 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1820 DebugLoc DL = Op.getDebugLoc();
1822 // Bitcast to integer nodes.
1823 SDValue X = DAG.getNode(ISD::BITCAST, DL, TyX, Op.getOperand(0));
1824 SDValue Y = DAG.getNode(ISD::BITCAST, DL, TyY, Op.getOperand(1));
1827 // ext E, Y, width(Y) - 1, 1 ; extract bit width(Y)-1 of Y
1828 // ins X, E, width(X) - 1, 1 ; insert extracted bit at bit width(X)-1 of X
1829 SDValue E = DAG.getNode(MipsISD::Ext, DL, TyY, Y,
1830 DAG.getConstant(WidthY - 1, MVT::i32), Const1);
1832 if (WidthX > WidthY)
1833 E = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, E);
1834 else if (WidthY > WidthX)
1835 E = DAG.getNode(ISD::TRUNCATE, DL, TyX, E);
1837 SDValue I = DAG.getNode(MipsISD::Ins, DL, TyX, E,
1838 DAG.getConstant(WidthX - 1, MVT::i32), Const1, X);
1839 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), I);
1842 // (d)sll SllX, X, 1
1843 // (d)srl SrlX, SllX, 1
1844 // (d)srl SrlY, Y, width(Y)-1
1845 // (d)sll SllY, SrlX, width(Y)-1
1846 // or Or, SrlX, SllY
1847 SDValue SllX = DAG.getNode(ISD::SHL, DL, TyX, X, Const1);
1848 SDValue SrlX = DAG.getNode(ISD::SRL, DL, TyX, SllX, Const1);
1849 SDValue SrlY = DAG.getNode(ISD::SRL, DL, TyY, Y,
1850 DAG.getConstant(WidthY - 1, MVT::i32));
1852 if (WidthX > WidthY)
1853 SrlY = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, SrlY);
1854 else if (WidthY > WidthX)
1855 SrlY = DAG.getNode(ISD::TRUNCATE, DL, TyX, SrlY);
1857 SDValue SllY = DAG.getNode(ISD::SHL, DL, TyX, SrlY,
1858 DAG.getConstant(WidthX - 1, MVT::i32));
1859 SDValue Or = DAG.getNode(ISD::OR, DL, TyX, SrlX, SllY);
1860 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Or);
1864 MipsTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
1865 if (Subtarget->hasMips64())
1866 return LowerFCOPYSIGN64(Op, DAG, Subtarget->hasMips32r2());
1868 return LowerFCOPYSIGN32(Op, DAG, Subtarget->hasMips32r2());
1871 static SDValue LowerFABS32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1872 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
1873 DebugLoc DL = Op.getDebugLoc();
1875 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1877 SDValue X = (Op.getValueType() == MVT::f32) ?
1878 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1879 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1884 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32,
1885 DAG.getRegister(Mips::ZERO, MVT::i32),
1886 DAG.getConstant(31, MVT::i32), Const1, X);
1888 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1889 Res = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1892 if (Op.getValueType() == MVT::f32)
1893 return DAG.getNode(ISD::BITCAST, DL, MVT::f32, Res);
1895 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1896 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1897 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1900 static SDValue LowerFABS64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1901 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
1902 DebugLoc DL = Op.getDebugLoc();
1904 // Bitcast to integer node.
1905 SDValue X = DAG.getNode(ISD::BITCAST, DL, MVT::i64, Op.getOperand(0));
1909 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i64,
1910 DAG.getRegister(Mips::ZERO_64, MVT::i64),
1911 DAG.getConstant(63, MVT::i32), Const1, X);
1913 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i64, X, Const1);
1914 Res = DAG.getNode(ISD::SRL, DL, MVT::i64, SllX, Const1);
1917 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, Res);
1921 MipsTargetLowering::LowerFABS(SDValue Op, SelectionDAG &DAG) const {
1922 if (Subtarget->hasMips64() && (Op.getValueType() == MVT::f64))
1923 return LowerFABS64(Op, DAG, Subtarget->hasMips32r2());
1925 return LowerFABS32(Op, DAG, Subtarget->hasMips32r2());
1928 SDValue MipsTargetLowering::
1929 LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
1931 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1932 "Frame address can only be determined for current frame.");
1934 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
1935 MFI->setFrameAddressIsTaken(true);
1936 EVT VT = Op.getValueType();
1937 DebugLoc dl = Op.getDebugLoc();
1938 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
1939 IsN64 ? Mips::FP_64 : Mips::FP, VT);
1943 // TODO: set SType according to the desired memory barrier behavior.
1945 MipsTargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG& DAG) const {
1947 DebugLoc dl = Op.getDebugLoc();
1948 return DAG.getNode(MipsISD::Sync, dl, MVT::Other, Op.getOperand(0),
1949 DAG.getConstant(SType, MVT::i32));
1952 SDValue MipsTargetLowering::LowerATOMIC_FENCE(SDValue Op,
1953 SelectionDAG& DAG) const {
1954 // FIXME: Need pseudo-fence for 'singlethread' fences
1955 // FIXME: Set SType for weaker fences where supported/appropriate.
1957 DebugLoc dl = Op.getDebugLoc();
1958 return DAG.getNode(MipsISD::Sync, dl, MVT::Other, Op.getOperand(0),
1959 DAG.getConstant(SType, MVT::i32));
1962 //===----------------------------------------------------------------------===//
1963 // Calling Convention Implementation
1964 //===----------------------------------------------------------------------===//
1966 //===----------------------------------------------------------------------===//
1967 // TODO: Implement a generic logic using tblgen that can support this.
1968 // Mips O32 ABI rules:
1970 // i32 - Passed in A0, A1, A2, A3 and stack
1971 // f32 - Only passed in f32 registers if no int reg has been used yet to hold
1972 // an argument. Otherwise, passed in A1, A2, A3 and stack.
1973 // f64 - Only passed in two aliased f32 registers if no int reg has been used
1974 // yet to hold an argument. Otherwise, use A2, A3 and stack. If A1 is
1975 // not used, it must be shadowed. If only A3 is avaiable, shadow it and
1978 // For vararg functions, all arguments are passed in A0, A1, A2, A3 and stack.
1979 //===----------------------------------------------------------------------===//
1981 static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
1982 MVT LocVT, CCValAssign::LocInfo LocInfo,
1983 ISD::ArgFlagsTy ArgFlags, CCState &State) {
1985 static const unsigned IntRegsSize=4, FloatRegsSize=2;
1987 static const uint16_t IntRegs[] = {
1988 Mips::A0, Mips::A1, Mips::A2, Mips::A3
1990 static const uint16_t F32Regs[] = {
1991 Mips::F12, Mips::F14
1993 static const uint16_t F64Regs[] = {
1998 if (ArgFlags.isByVal()) {
1999 State.HandleByVal(ValNo, ValVT, LocVT, LocInfo,
2000 1 /*MinSize*/, 4 /*MinAlign*/, ArgFlags);
2001 unsigned NextReg = (State.getNextStackOffset() + 3) / 4;
2002 for (unsigned r = State.getFirstUnallocated(IntRegs, IntRegsSize);
2003 r < std::min(IntRegsSize, NextReg); ++r)
2004 State.AllocateReg(IntRegs[r]);
2008 // Promote i8 and i16
2009 if (LocVT == MVT::i8 || LocVT == MVT::i16) {
2011 if (ArgFlags.isSExt())
2012 LocInfo = CCValAssign::SExt;
2013 else if (ArgFlags.isZExt())
2014 LocInfo = CCValAssign::ZExt;
2016 LocInfo = CCValAssign::AExt;
2021 // f32 and f64 are allocated in A0, A1, A2, A3 when either of the following
2022 // is true: function is vararg, argument is 3rd or higher, there is previous
2023 // argument which is not f32 or f64.
2024 bool AllocateFloatsInIntReg = State.isVarArg() || ValNo > 1
2025 || State.getFirstUnallocated(F32Regs, FloatRegsSize) != ValNo;
2026 unsigned OrigAlign = ArgFlags.getOrigAlign();
2027 bool isI64 = (ValVT == MVT::i32 && OrigAlign == 8);
2029 if (ValVT == MVT::i32 || (ValVT == MVT::f32 && AllocateFloatsInIntReg)) {
2030 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2031 // If this is the first part of an i64 arg,
2032 // the allocated register must be either A0 or A2.
2033 if (isI64 && (Reg == Mips::A1 || Reg == Mips::A3))
2034 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2036 } else if (ValVT == MVT::f64 && AllocateFloatsInIntReg) {
2037 // Allocate int register and shadow next int register. If first
2038 // available register is Mips::A1 or Mips::A3, shadow it too.
2039 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2040 if (Reg == Mips::A1 || Reg == Mips::A3)
2041 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2042 State.AllocateReg(IntRegs, IntRegsSize);
2044 } else if (ValVT.isFloatingPoint() && !AllocateFloatsInIntReg) {
2045 // we are guaranteed to find an available float register
2046 if (ValVT == MVT::f32) {
2047 Reg = State.AllocateReg(F32Regs, FloatRegsSize);
2048 // Shadow int register
2049 State.AllocateReg(IntRegs, IntRegsSize);
2051 Reg = State.AllocateReg(F64Regs, FloatRegsSize);
2052 // Shadow int registers
2053 unsigned Reg2 = State.AllocateReg(IntRegs, IntRegsSize);
2054 if (Reg2 == Mips::A1 || Reg2 == Mips::A3)
2055 State.AllocateReg(IntRegs, IntRegsSize);
2056 State.AllocateReg(IntRegs, IntRegsSize);
2059 llvm_unreachable("Cannot handle this ValVT.");
2061 unsigned SizeInBytes = ValVT.getSizeInBits() >> 3;
2062 unsigned Offset = State.AllocateStack(SizeInBytes, OrigAlign);
2065 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2067 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
2069 return false; // CC must always match
2072 static const uint16_t Mips64IntRegs[8] =
2073 {Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
2074 Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64};
2075 static const uint16_t Mips64DPRegs[8] =
2076 {Mips::D12_64, Mips::D13_64, Mips::D14_64, Mips::D15_64,
2077 Mips::D16_64, Mips::D17_64, Mips::D18_64, Mips::D19_64};
2079 static bool CC_Mips64Byval(unsigned ValNo, MVT ValVT, MVT LocVT,
2080 CCValAssign::LocInfo LocInfo,
2081 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2082 unsigned Align = std::max(ArgFlags.getByValAlign(), (unsigned)8);
2083 unsigned Size = (ArgFlags.getByValSize() + 7) / 8 * 8;
2084 unsigned FirstIdx = State.getFirstUnallocated(Mips64IntRegs, 8);
2086 assert(Align <= 16 && "Cannot handle alignments larger than 16.");
2088 // If byval is 16-byte aligned, the first arg register must be even.
2089 if ((Align == 16) && (FirstIdx % 2)) {
2090 State.AllocateReg(Mips64IntRegs[FirstIdx], Mips64DPRegs[FirstIdx]);
2094 // Mark the registers allocated.
2095 for (unsigned I = FirstIdx; Size && (I < 8); Size -= 8, ++I)
2096 State.AllocateReg(Mips64IntRegs[I], Mips64DPRegs[I]);
2098 // Allocate space on caller's stack.
2099 unsigned Offset = State.AllocateStack(Size, Align);
2102 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Mips64IntRegs[FirstIdx],
2105 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2110 #include "MipsGenCallingConv.inc"
2113 AnalyzeMips64CallOperands(CCState &CCInfo,
2114 const SmallVectorImpl<ISD::OutputArg> &Outs) {
2115 unsigned NumOps = Outs.size();
2116 for (unsigned i = 0; i != NumOps; ++i) {
2117 MVT ArgVT = Outs[i].VT;
2118 ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
2121 if (Outs[i].IsFixed)
2122 R = CC_MipsN(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
2124 R = CC_MipsN_VarArg(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
2128 dbgs() << "Call operand #" << i << " has unhandled type "
2129 << EVT(ArgVT).getEVTString();
2131 llvm_unreachable(0);
2136 //===----------------------------------------------------------------------===//
2137 // Call Calling Convention Implementation
2138 //===----------------------------------------------------------------------===//
2140 static const unsigned O32IntRegsSize = 4;
2142 static const uint16_t O32IntRegs[] = {
2143 Mips::A0, Mips::A1, Mips::A2, Mips::A3
2146 // Return next O32 integer argument register.
2147 static unsigned getNextIntArgReg(unsigned Reg) {
2148 assert((Reg == Mips::A0) || (Reg == Mips::A2));
2149 return (Reg == Mips::A0) ? Mips::A1 : Mips::A3;
2152 // Write ByVal Arg to arg registers and stack.
2154 WriteByValArg(SDValue& ByValChain, SDValue Chain, DebugLoc dl,
2155 SmallVector<std::pair<unsigned, SDValue>, 16>& RegsToPass,
2156 SmallVector<SDValue, 8>& MemOpChains, int& LastFI,
2157 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
2158 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2159 MVT PtrType, bool isLittle) {
2160 unsigned LocMemOffset = VA.getLocMemOffset();
2161 unsigned Offset = 0;
2162 uint32_t RemainingSize = Flags.getByValSize();
2163 unsigned ByValAlign = Flags.getByValAlign();
2165 // Copy the first 4 words of byval arg to registers A0 - A3.
2166 // FIXME: Use a stricter alignment if it enables better optimization in passes
2168 for (; RemainingSize >= 4 && LocMemOffset < 4 * 4;
2169 Offset += 4, RemainingSize -= 4, LocMemOffset += 4) {
2170 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2171 DAG.getConstant(Offset, MVT::i32));
2172 SDValue LoadVal = DAG.getLoad(MVT::i32, dl, Chain, LoadPtr,
2173 MachinePointerInfo(), false, false, false,
2174 std::min(ByValAlign, (unsigned )4));
2175 MemOpChains.push_back(LoadVal.getValue(1));
2176 unsigned DstReg = O32IntRegs[LocMemOffset / 4];
2177 RegsToPass.push_back(std::make_pair(DstReg, LoadVal));
2180 if (RemainingSize == 0)
2183 // If there still is a register available for argument passing, write the
2184 // remaining part of the structure to it using subword loads and shifts.
2185 if (LocMemOffset < 4 * 4) {
2186 assert(RemainingSize <= 3 && RemainingSize >= 1 &&
2187 "There must be one to three bytes remaining.");
2188 unsigned LoadSize = (RemainingSize == 3 ? 2 : RemainingSize);
2189 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2190 DAG.getConstant(Offset, MVT::i32));
2191 unsigned Alignment = std::min(ByValAlign, (unsigned )4);
2192 SDValue LoadVal = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, Chain,
2193 LoadPtr, MachinePointerInfo(),
2194 MVT::getIntegerVT(LoadSize * 8), false,
2196 MemOpChains.push_back(LoadVal.getValue(1));
2198 // If target is big endian, shift it to the most significant half-word or
2201 LoadVal = DAG.getNode(ISD::SHL, dl, MVT::i32, LoadVal,
2202 DAG.getConstant(32 - LoadSize * 8, MVT::i32));
2205 RemainingSize -= LoadSize;
2207 // Read second subword if necessary.
2208 if (RemainingSize != 0) {
2209 assert(RemainingSize == 1 && "There must be one byte remaining.");
2210 LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2211 DAG.getConstant(Offset, MVT::i32));
2212 unsigned Alignment = std::min(ByValAlign, (unsigned )2);
2213 SDValue Subword = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, Chain,
2214 LoadPtr, MachinePointerInfo(),
2215 MVT::i8, false, false, Alignment);
2216 MemOpChains.push_back(Subword.getValue(1));
2217 // Insert the loaded byte to LoadVal.
2218 // FIXME: Use INS if supported by target.
2219 unsigned ShiftAmt = isLittle ? 16 : 8;
2220 SDValue Shift = DAG.getNode(ISD::SHL, dl, MVT::i32, Subword,
2221 DAG.getConstant(ShiftAmt, MVT::i32));
2222 LoadVal = DAG.getNode(ISD::OR, dl, MVT::i32, LoadVal, Shift);
2225 unsigned DstReg = O32IntRegs[LocMemOffset / 4];
2226 RegsToPass.push_back(std::make_pair(DstReg, LoadVal));
2230 // Create a fixed object on stack at offset LocMemOffset and copy
2231 // remaining part of byval arg to it using memcpy.
2232 SDValue Src = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2233 DAG.getConstant(Offset, MVT::i32));
2234 LastFI = MFI->CreateFixedObject(RemainingSize, LocMemOffset, true);
2235 SDValue Dst = DAG.getFrameIndex(LastFI, PtrType);
2236 ByValChain = DAG.getMemcpy(ByValChain, dl, Dst, Src,
2237 DAG.getConstant(RemainingSize, MVT::i32),
2238 std::min(ByValAlign, (unsigned)4),
2239 /*isVolatile=*/false, /*AlwaysInline=*/false,
2240 MachinePointerInfo(0), MachinePointerInfo(0));
2243 // Copy Mips64 byVal arg to registers and stack.
2245 PassByValArg64(SDValue& ByValChain, SDValue Chain, DebugLoc dl,
2246 SmallVector<std::pair<unsigned, SDValue>, 16>& RegsToPass,
2247 SmallVector<SDValue, 8>& MemOpChains, int& LastFI,
2248 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
2249 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2250 EVT PtrTy, bool isLittle) {
2251 unsigned ByValSize = Flags.getByValSize();
2252 unsigned Alignment = std::min(Flags.getByValAlign(), (unsigned)8);
2253 bool IsRegLoc = VA.isRegLoc();
2254 unsigned Offset = 0; // Offset in # of bytes from the beginning of struct.
2255 unsigned LocMemOffset = 0;
2256 unsigned MemCpySize = ByValSize;
2259 LocMemOffset = VA.getLocMemOffset();
2261 const uint16_t *Reg = std::find(Mips64IntRegs, Mips64IntRegs + 8,
2263 const uint16_t *RegEnd = Mips64IntRegs + 8;
2265 // Copy double words to registers.
2266 for (; (Reg != RegEnd) && (ByValSize >= Offset + 8); ++Reg, Offset += 8) {
2267 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2268 DAG.getConstant(Offset, PtrTy));
2269 SDValue LoadVal = DAG.getLoad(MVT::i64, dl, Chain, LoadPtr,
2270 MachinePointerInfo(), false, false, false,
2272 MemOpChains.push_back(LoadVal.getValue(1));
2273 RegsToPass.push_back(std::make_pair(*Reg, LoadVal));
2276 // Return if the struct has been fully copied.
2277 if (!(MemCpySize = ByValSize - Offset))
2280 // If there is an argument register available, copy the remainder of the
2281 // byval argument with sub-doubleword loads and shifts.
2282 if (Reg != RegEnd) {
2283 assert((ByValSize < Offset + 8) &&
2284 "Size of the remainder should be smaller than 8-byte.");
2286 for (unsigned LoadSize = 4; Offset < ByValSize; LoadSize /= 2) {
2287 unsigned RemSize = ByValSize - Offset;
2289 if (RemSize < LoadSize)
2292 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2293 DAG.getConstant(Offset, PtrTy));
2295 DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i64, Chain, LoadPtr,
2296 MachinePointerInfo(), MVT::getIntegerVT(LoadSize * 8),
2297 false, false, Alignment);
2298 MemOpChains.push_back(LoadVal.getValue(1));
2300 // Offset in number of bits from double word boundary.
2301 unsigned OffsetDW = (Offset % 8) * 8;
2302 unsigned Shamt = isLittle ? OffsetDW : 64 - (OffsetDW + LoadSize * 8);
2303 SDValue Shift = DAG.getNode(ISD::SHL, dl, MVT::i64, LoadVal,
2304 DAG.getConstant(Shamt, MVT::i32));
2306 Val = Val.getNode() ? DAG.getNode(ISD::OR, dl, MVT::i64, Val, Shift) :
2309 Alignment = std::min(Alignment, LoadSize);
2312 RegsToPass.push_back(std::make_pair(*Reg, Val));
2317 assert(MemCpySize && "MemCpySize must not be zero.");
2319 // Create a fixed object on stack at offset LocMemOffset and copy
2320 // remainder of byval arg to it with memcpy.
2321 SDValue Src = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2322 DAG.getConstant(Offset, PtrTy));
2323 LastFI = MFI->CreateFixedObject(MemCpySize, LocMemOffset, true);
2324 SDValue Dst = DAG.getFrameIndex(LastFI, PtrTy);
2325 ByValChain = DAG.getMemcpy(ByValChain, dl, Dst, Src,
2326 DAG.getConstant(MemCpySize, PtrTy), Alignment,
2327 /*isVolatile=*/false, /*AlwaysInline=*/false,
2328 MachinePointerInfo(0), MachinePointerInfo(0));
2331 /// LowerCall - functions arguments are copied from virtual regs to
2332 /// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
2333 /// TODO: isTailCall.
2335 MipsTargetLowering::LowerCall(SDValue InChain, SDValue Callee,
2336 CallingConv::ID CallConv, bool isVarArg,
2337 bool doesNotRet, bool &isTailCall,
2338 const SmallVectorImpl<ISD::OutputArg> &Outs,
2339 const SmallVectorImpl<SDValue> &OutVals,
2340 const SmallVectorImpl<ISD::InputArg> &Ins,
2341 DebugLoc dl, SelectionDAG &DAG,
2342 SmallVectorImpl<SDValue> &InVals) const {
2343 // MIPs target does not yet support tail call optimization.
2346 MachineFunction &MF = DAG.getMachineFunction();
2347 MachineFrameInfo *MFI = MF.getFrameInfo();
2348 const TargetFrameLowering *TFL = MF.getTarget().getFrameLowering();
2349 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
2350 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2352 // Analyze operands of the call, assigning locations to each operand.
2353 SmallVector<CCValAssign, 16> ArgLocs;
2354 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2355 getTargetMachine(), ArgLocs, *DAG.getContext());
2358 CCInfo.AnalyzeCallOperands(Outs, CC_MipsO32);
2360 AnalyzeMips64CallOperands(CCInfo, Outs);
2362 CCInfo.AnalyzeCallOperands(Outs, CC_Mips);
2364 // Get a count of how many bytes are to be pushed on the stack.
2365 unsigned NextStackOffset = CCInfo.getNextStackOffset();
2367 // Chain is the output chain of the last Load/Store or CopyToReg node.
2368 // ByValChain is the output chain of the last Memcpy node created for copying
2369 // byval arguments to the stack.
2370 SDValue Chain, CallSeqStart, ByValChain;
2371 SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true);
2372 Chain = CallSeqStart = DAG.getCALLSEQ_START(InChain, NextStackOffsetVal);
2373 ByValChain = InChain;
2375 // If this is the first call, create a stack frame object that points to
2376 // a location to which .cprestore saves $gp.
2377 if (IsO32 && IsPIC && MipsFI->globalBaseRegFixed() && !MipsFI->getGPFI())
2378 MipsFI->setGPFI(MFI->CreateFixedObject(4, 0, true));
2380 // Get the frame index of the stack frame object that points to the location
2381 // of dynamically allocated area on the stack.
2382 int DynAllocFI = MipsFI->getDynAllocFI();
2384 // Update size of the maximum argument space.
2385 // For O32, a minimum of four words (16 bytes) of argument space is
2388 NextStackOffset = std::max(NextStackOffset, (unsigned)16);
2390 unsigned MaxCallFrameSize = MipsFI->getMaxCallFrameSize();
2392 if (MaxCallFrameSize < NextStackOffset) {
2393 MipsFI->setMaxCallFrameSize(NextStackOffset);
2395 // Set the offsets relative to $sp of the $gp restore slot and dynamically
2396 // allocated stack space. These offsets must be aligned to a boundary
2397 // determined by the stack alignment of the ABI.
2398 unsigned StackAlignment = TFL->getStackAlignment();
2399 NextStackOffset = (NextStackOffset + StackAlignment - 1) /
2400 StackAlignment * StackAlignment;
2402 if (MipsFI->needGPSaveRestore())
2403 MFI->setObjectOffset(MipsFI->getGPFI(), NextStackOffset);
2405 MFI->setObjectOffset(DynAllocFI, NextStackOffset);
2408 // With EABI is it possible to have 16 args on registers.
2409 SmallVector<std::pair<unsigned, SDValue>, 16> RegsToPass;
2410 SmallVector<SDValue, 8> MemOpChains;
2412 int FirstFI = -MFI->getNumFixedObjects() - 1, LastFI = 0;
2414 // Walk the register/memloc assignments, inserting copies/loads.
2415 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2416 SDValue Arg = OutVals[i];
2417 CCValAssign &VA = ArgLocs[i];
2418 MVT ValVT = VA.getValVT(), LocVT = VA.getLocVT();
2419 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2422 if (Flags.isByVal()) {
2423 assert(Flags.getByValSize() &&
2424 "ByVal args of size 0 should have been ignored by front-end.");
2426 WriteByValArg(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI,
2427 MFI, DAG, Arg, VA, Flags, getPointerTy(),
2428 Subtarget->isLittle());
2430 PassByValArg64(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI,
2431 MFI, DAG, Arg, VA, Flags, getPointerTy(),
2432 Subtarget->isLittle());
2436 // Promote the value if needed.
2437 switch (VA.getLocInfo()) {
2438 default: llvm_unreachable("Unknown loc info!");
2439 case CCValAssign::Full:
2440 if (VA.isRegLoc()) {
2441 if ((ValVT == MVT::f32 && LocVT == MVT::i32) ||
2442 (ValVT == MVT::f64 && LocVT == MVT::i64))
2443 Arg = DAG.getNode(ISD::BITCAST, dl, LocVT, Arg);
2444 else if (ValVT == MVT::f64 && LocVT == MVT::i32) {
2445 SDValue Lo = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32,
2446 Arg, DAG.getConstant(0, MVT::i32));
2447 SDValue Hi = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32,
2448 Arg, DAG.getConstant(1, MVT::i32));
2449 if (!Subtarget->isLittle())
2451 unsigned LocRegLo = VA.getLocReg();
2452 unsigned LocRegHigh = getNextIntArgReg(LocRegLo);
2453 RegsToPass.push_back(std::make_pair(LocRegLo, Lo));
2454 RegsToPass.push_back(std::make_pair(LocRegHigh, Hi));
2459 case CCValAssign::SExt:
2460 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, LocVT, Arg);
2462 case CCValAssign::ZExt:
2463 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, LocVT, Arg);
2465 case CCValAssign::AExt:
2466 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, LocVT, Arg);
2470 // Arguments that can be passed on register must be kept at
2471 // RegsToPass vector
2472 if (VA.isRegLoc()) {
2473 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2477 // Register can't get to this point...
2478 assert(VA.isMemLoc());
2480 // Create the frame index object for this incoming parameter
2481 LastFI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2482 VA.getLocMemOffset(), true);
2483 SDValue PtrOff = DAG.getFrameIndex(LastFI, getPointerTy());
2485 // emit ISD::STORE whichs stores the
2486 // parameter value to a stack Location
2487 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
2488 MachinePointerInfo(), false, false, 0));
2491 // Extend range of indices of frame objects for outgoing arguments that were
2492 // created during this function call. Skip this step if no such objects were
2495 MipsFI->extendOutArgFIRange(FirstFI, LastFI);
2497 // If a memcpy has been created to copy a byval arg to a stack, replace the
2498 // chain input of CallSeqStart with ByValChain.
2499 if (InChain != ByValChain)
2500 DAG.UpdateNodeOperands(CallSeqStart.getNode(), ByValChain,
2501 NextStackOffsetVal);
2503 // Transform all store nodes into one single node because all store
2504 // nodes are independent of each other.
2505 if (!MemOpChains.empty())
2506 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2507 &MemOpChains[0], MemOpChains.size());
2509 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
2510 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
2511 // node so that legalize doesn't hack it.
2512 unsigned char OpFlag;
2513 bool IsPICCall = (IsN64 || IsPIC); // true if calls are translated to jalr $25
2514 bool GlobalOrExternal = false;
2517 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2518 if (IsPICCall && G->getGlobal()->hasInternalLinkage()) {
2519 OpFlag = IsO32 ? MipsII::MO_GOT : MipsII::MO_GOT_PAGE;
2520 unsigned char LoFlag = IsO32 ? MipsII::MO_ABS_LO : MipsII::MO_GOT_OFST;
2521 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(), 0,
2523 CalleeLo = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(),
2526 OpFlag = IsPICCall ? MipsII::MO_GOT_CALL : MipsII::MO_NO_FLAG;
2527 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
2528 getPointerTy(), 0, OpFlag);
2531 GlobalOrExternal = true;
2533 else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2534 if (IsN64 || (!IsO32 && IsPIC))
2535 OpFlag = MipsII::MO_GOT_DISP;
2536 else if (!IsPIC) // !N64 && static
2537 OpFlag = MipsII::MO_NO_FLAG;
2539 OpFlag = MipsII::MO_GOT_CALL;
2540 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2542 GlobalOrExternal = true;
2547 // Create nodes that load address of callee and copy it to T9
2549 if (GlobalOrExternal) {
2550 // Load callee address
2551 Callee = DAG.getNode(MipsISD::Wrapper, dl, getPointerTy(),
2552 GetGlobalReg(DAG, getPointerTy()), Callee);
2553 SDValue LoadValue = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
2554 Callee, MachinePointerInfo::getGOT(),
2555 false, false, false, 0);
2557 // Use GOT+LO if callee has internal linkage.
2558 if (CalleeLo.getNode()) {
2559 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, getPointerTy(), CalleeLo);
2560 Callee = DAG.getNode(ISD::ADD, dl, getPointerTy(), LoadValue, Lo);
2566 // T9 should contain the address of the callee function if
2567 // -reloction-model=pic or it is an indirect call.
2568 if (IsPICCall || !GlobalOrExternal) {
2570 unsigned T9Reg = IsN64 ? Mips::T9_64 : Mips::T9;
2571 Chain = DAG.getCopyToReg(Chain, dl, T9Reg, Callee, SDValue(0, 0));
2572 InFlag = Chain.getValue(1);
2573 Callee = DAG.getRegister(T9Reg, getPointerTy());
2576 // Build a sequence of copy-to-reg nodes chained together with token
2577 // chain and flag operands which copy the outgoing args into registers.
2578 // The InFlag in necessary since all emitted instructions must be
2580 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2581 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2582 RegsToPass[i].second, InFlag);
2583 InFlag = Chain.getValue(1);
2586 // MipsJmpLink = #chain, #target_address, #opt_in_flags...
2587 // = Chain, Callee, Reg#1, Reg#2, ...
2589 // Returns a chain & a flag for retval copy to use.
2590 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2591 SmallVector<SDValue, 8> Ops;
2592 Ops.push_back(Chain);
2593 Ops.push_back(Callee);
2595 // Add argument registers to the end of the list so that they are
2596 // known live into the call.
2597 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2598 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2599 RegsToPass[i].second.getValueType()));
2601 // Add a register mask operand representing the call-preserved registers.
2602 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2603 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
2604 assert(Mask && "Missing call preserved mask for calling convention");
2605 Ops.push_back(DAG.getRegisterMask(Mask));
2607 if (InFlag.getNode())
2608 Ops.push_back(InFlag);
2610 Chain = DAG.getNode(MipsISD::JmpLink, dl, NodeTys, &Ops[0], Ops.size());
2611 InFlag = Chain.getValue(1);
2613 // Create the CALLSEQ_END node.
2614 Chain = DAG.getCALLSEQ_END(Chain,
2615 DAG.getIntPtrConstant(NextStackOffset, true),
2616 DAG.getIntPtrConstant(0, true), InFlag);
2617 InFlag = Chain.getValue(1);
2619 // Handle result values, copying them out of physregs into vregs that we
2621 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2622 Ins, dl, DAG, InVals);
2625 /// LowerCallResult - Lower the result values of a call into the
2626 /// appropriate copies out of appropriate physical registers.
2628 MipsTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2629 CallingConv::ID CallConv, bool isVarArg,
2630 const SmallVectorImpl<ISD::InputArg> &Ins,
2631 DebugLoc dl, SelectionDAG &DAG,
2632 SmallVectorImpl<SDValue> &InVals) const {
2633 // Assign locations to each value returned by this call.
2634 SmallVector<CCValAssign, 16> RVLocs;
2635 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2636 getTargetMachine(), RVLocs, *DAG.getContext());
2638 CCInfo.AnalyzeCallResult(Ins, RetCC_Mips);
2640 // Copy all of the result registers out of their specified physreg.
2641 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2642 Chain = DAG.getCopyFromReg(Chain, dl, RVLocs[i].getLocReg(),
2643 RVLocs[i].getValVT(), InFlag).getValue(1);
2644 InFlag = Chain.getValue(2);
2645 InVals.push_back(Chain.getValue(0));
2651 //===----------------------------------------------------------------------===//
2652 // Formal Arguments Calling Convention Implementation
2653 //===----------------------------------------------------------------------===//
2654 static void ReadByValArg(MachineFunction &MF, SDValue Chain, DebugLoc dl,
2655 std::vector<SDValue>& OutChains,
2656 SelectionDAG &DAG, unsigned NumWords, SDValue FIN,
2657 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2658 const Argument *FuncArg) {
2659 unsigned LocMem = VA.getLocMemOffset();
2660 unsigned FirstWord = LocMem / 4;
2662 // copy register A0 - A3 to frame object
2663 for (unsigned i = 0; i < NumWords; ++i) {
2664 unsigned CurWord = FirstWord + i;
2665 if (CurWord >= O32IntRegsSize)
2668 unsigned SrcReg = O32IntRegs[CurWord];
2669 unsigned Reg = AddLiveIn(MF, SrcReg, &Mips::CPURegsRegClass);
2670 SDValue StorePtr = DAG.getNode(ISD::ADD, dl, MVT::i32, FIN,
2671 DAG.getConstant(i * 4, MVT::i32));
2672 SDValue Store = DAG.getStore(Chain, dl, DAG.getRegister(Reg, MVT::i32),
2673 StorePtr, MachinePointerInfo(FuncArg, i * 4),
2675 OutChains.push_back(Store);
2679 // Create frame object on stack and copy registers used for byval passing to it.
2681 CopyMips64ByValRegs(MachineFunction &MF, SDValue Chain, DebugLoc dl,
2682 std::vector<SDValue>& OutChains, SelectionDAG &DAG,
2683 const CCValAssign &VA, const ISD::ArgFlagsTy& Flags,
2684 MachineFrameInfo *MFI, bool IsRegLoc,
2685 SmallVectorImpl<SDValue> &InVals, MipsFunctionInfo *MipsFI,
2686 EVT PtrTy, const Argument *FuncArg) {
2687 const uint16_t *Reg = Mips64IntRegs + 8;
2688 int FOOffset; // Frame object offset from virtual frame pointer.
2691 Reg = std::find(Mips64IntRegs, Mips64IntRegs + 8, VA.getLocReg());
2692 FOOffset = (Reg - Mips64IntRegs) * 8 - 8 * 8;
2695 FOOffset = VA.getLocMemOffset();
2697 // Create frame object.
2698 unsigned NumRegs = (Flags.getByValSize() + 7) / 8;
2699 unsigned LastFI = MFI->CreateFixedObject(NumRegs * 8, FOOffset, true);
2700 SDValue FIN = DAG.getFrameIndex(LastFI, PtrTy);
2701 InVals.push_back(FIN);
2703 // Copy arg registers.
2704 for (unsigned I = 0; (Reg != Mips64IntRegs + 8) && (I < NumRegs);
2706 unsigned VReg = AddLiveIn(MF, *Reg, &Mips::CPU64RegsRegClass);
2707 SDValue StorePtr = DAG.getNode(ISD::ADD, dl, PtrTy, FIN,
2708 DAG.getConstant(I * 8, PtrTy));
2709 SDValue Store = DAG.getStore(Chain, dl, DAG.getRegister(VReg, MVT::i64),
2710 StorePtr, MachinePointerInfo(FuncArg, I * 8),
2712 OutChains.push_back(Store);
2718 /// LowerFormalArguments - transform physical registers into virtual registers
2719 /// and generate load operations for arguments places on the stack.
2721 MipsTargetLowering::LowerFormalArguments(SDValue Chain,
2722 CallingConv::ID CallConv,
2724 const SmallVectorImpl<ISD::InputArg> &Ins,
2725 DebugLoc dl, SelectionDAG &DAG,
2726 SmallVectorImpl<SDValue> &InVals)
2728 MachineFunction &MF = DAG.getMachineFunction();
2729 MachineFrameInfo *MFI = MF.getFrameInfo();
2730 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2732 MipsFI->setVarArgsFrameIndex(0);
2734 // Used with vargs to acumulate store chains.
2735 std::vector<SDValue> OutChains;
2737 // Assign locations to all of the incoming arguments.
2738 SmallVector<CCValAssign, 16> ArgLocs;
2739 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2740 getTargetMachine(), ArgLocs, *DAG.getContext());
2743 CCInfo.AnalyzeFormalArguments(Ins, CC_MipsO32);
2745 CCInfo.AnalyzeFormalArguments(Ins, CC_Mips);
2747 Function::const_arg_iterator FuncArg =
2748 DAG.getMachineFunction().getFunction()->arg_begin();
2749 int LastFI = 0;// MipsFI->LastInArgFI is 0 at the entry of this function.
2751 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i, ++FuncArg) {
2752 CCValAssign &VA = ArgLocs[i];
2753 EVT ValVT = VA.getValVT();
2754 ISD::ArgFlagsTy Flags = Ins[i].Flags;
2755 bool IsRegLoc = VA.isRegLoc();
2757 if (Flags.isByVal()) {
2758 assert(Flags.getByValSize() &&
2759 "ByVal args of size 0 should have been ignored by front-end.");
2761 unsigned NumWords = (Flags.getByValSize() + 3) / 4;
2762 LastFI = MFI->CreateFixedObject(NumWords * 4, VA.getLocMemOffset(),
2764 SDValue FIN = DAG.getFrameIndex(LastFI, getPointerTy());
2765 InVals.push_back(FIN);
2766 ReadByValArg(MF, Chain, dl, OutChains, DAG, NumWords, FIN, VA, Flags,
2769 LastFI = CopyMips64ByValRegs(MF, Chain, dl, OutChains, DAG, VA, Flags,
2770 MFI, IsRegLoc, InVals, MipsFI,
2771 getPointerTy(), &*FuncArg);
2775 // Arguments stored on registers
2777 EVT RegVT = VA.getLocVT();
2778 unsigned ArgReg = VA.getLocReg();
2779 const TargetRegisterClass *RC;
2781 if (RegVT == MVT::i32)
2782 RC = &Mips::CPURegsRegClass;
2783 else if (RegVT == MVT::i64)
2784 RC = &Mips::CPU64RegsRegClass;
2785 else if (RegVT == MVT::f32)
2786 RC = &Mips::FGR32RegClass;
2787 else if (RegVT == MVT::f64)
2788 RC = HasMips64 ? &Mips::FGR64RegClass : &Mips::AFGR64RegClass;
2790 llvm_unreachable("RegVT not supported by FormalArguments Lowering");
2792 // Transform the arguments stored on
2793 // physical registers into virtual ones
2794 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), ArgReg, RC);
2795 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2797 // If this is an 8 or 16-bit value, it has been passed promoted
2798 // to 32 bits. Insert an assert[sz]ext to capture this, then
2799 // truncate to the right size.
2800 if (VA.getLocInfo() != CCValAssign::Full) {
2801 unsigned Opcode = 0;
2802 if (VA.getLocInfo() == CCValAssign::SExt)
2803 Opcode = ISD::AssertSext;
2804 else if (VA.getLocInfo() == CCValAssign::ZExt)
2805 Opcode = ISD::AssertZext;
2807 ArgValue = DAG.getNode(Opcode, dl, RegVT, ArgValue,
2808 DAG.getValueType(ValVT));
2809 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, ValVT, ArgValue);
2812 // Handle floating point arguments passed in integer registers.
2813 if ((RegVT == MVT::i32 && ValVT == MVT::f32) ||
2814 (RegVT == MVT::i64 && ValVT == MVT::f64))
2815 ArgValue = DAG.getNode(ISD::BITCAST, dl, ValVT, ArgValue);
2816 else if (IsO32 && RegVT == MVT::i32 && ValVT == MVT::f64) {
2817 unsigned Reg2 = AddLiveIn(DAG.getMachineFunction(),
2818 getNextIntArgReg(ArgReg), RC);
2819 SDValue ArgValue2 = DAG.getCopyFromReg(Chain, dl, Reg2, RegVT);
2820 if (!Subtarget->isLittle())
2821 std::swap(ArgValue, ArgValue2);
2822 ArgValue = DAG.getNode(MipsISD::BuildPairF64, dl, MVT::f64,
2823 ArgValue, ArgValue2);
2826 InVals.push_back(ArgValue);
2827 } else { // VA.isRegLoc()
2830 assert(VA.isMemLoc());
2832 // The stack pointer offset is relative to the caller stack frame.
2833 LastFI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2834 VA.getLocMemOffset(), true);
2836 // Create load nodes to retrieve arguments from the stack
2837 SDValue FIN = DAG.getFrameIndex(LastFI, getPointerTy());
2838 InVals.push_back(DAG.getLoad(ValVT, dl, Chain, FIN,
2839 MachinePointerInfo::getFixedStack(LastFI),
2840 false, false, false, 0));
2844 // The mips ABIs for returning structs by value requires that we copy
2845 // the sret argument into $v0 for the return. Save the argument into
2846 // a virtual register so that we can access it from the return points.
2847 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
2848 unsigned Reg = MipsFI->getSRetReturnReg();
2850 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i32));
2851 MipsFI->setSRetReturnReg(Reg);
2853 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
2854 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
2858 unsigned NumOfRegs = IsO32 ? 4 : 8;
2859 const uint16_t *ArgRegs = IsO32 ? O32IntRegs : Mips64IntRegs;
2860 unsigned Idx = CCInfo.getFirstUnallocated(ArgRegs, NumOfRegs);
2861 int FirstRegSlotOffset = IsO32 ? 0 : -64 ; // offset of $a0's slot.
2862 const TargetRegisterClass *RC = IsO32 ?
2863 (const TargetRegisterClass*)&Mips::CPURegsRegClass :
2864 (const TargetRegisterClass*)&Mips::CPU64RegsRegClass;
2865 unsigned RegSize = RC->getSize();
2866 int RegSlotOffset = FirstRegSlotOffset + Idx * RegSize;
2868 // Offset of the first variable argument from stack pointer.
2869 int FirstVaArgOffset;
2871 if (IsO32 || (Idx == NumOfRegs)) {
2873 (CCInfo.getNextStackOffset() + RegSize - 1) / RegSize * RegSize;
2875 FirstVaArgOffset = RegSlotOffset;
2877 // Record the frame index of the first variable argument
2878 // which is a value necessary to VASTART.
2879 LastFI = MFI->CreateFixedObject(RegSize, FirstVaArgOffset, true);
2880 MipsFI->setVarArgsFrameIndex(LastFI);
2882 // Copy the integer registers that have not been used for argument passing
2883 // to the argument register save area. For O32, the save area is allocated
2884 // in the caller's stack frame, while for N32/64, it is allocated in the
2885 // callee's stack frame.
2886 for (int StackOffset = RegSlotOffset;
2887 Idx < NumOfRegs; ++Idx, StackOffset += RegSize) {
2888 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), ArgRegs[Idx], RC);
2889 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg,
2890 MVT::getIntegerVT(RegSize * 8));
2891 LastFI = MFI->CreateFixedObject(RegSize, StackOffset, true);
2892 SDValue PtrOff = DAG.getFrameIndex(LastFI, getPointerTy());
2893 OutChains.push_back(DAG.getStore(Chain, dl, ArgValue, PtrOff,
2894 MachinePointerInfo(), false, false, 0));
2898 MipsFI->setLastInArgFI(LastFI);
2900 // All stores are grouped in one node to allow the matching between
2901 // the size of Ins and InVals. This only happens when on varg functions
2902 if (!OutChains.empty()) {
2903 OutChains.push_back(Chain);
2904 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2905 &OutChains[0], OutChains.size());
2911 //===----------------------------------------------------------------------===//
2912 // Return Value Calling Convention Implementation
2913 //===----------------------------------------------------------------------===//
2916 MipsTargetLowering::LowerReturn(SDValue Chain,
2917 CallingConv::ID CallConv, bool isVarArg,
2918 const SmallVectorImpl<ISD::OutputArg> &Outs,
2919 const SmallVectorImpl<SDValue> &OutVals,
2920 DebugLoc dl, SelectionDAG &DAG) const {
2922 // CCValAssign - represent the assignment of
2923 // the return value to a location
2924 SmallVector<CCValAssign, 16> RVLocs;
2926 // CCState - Info about the registers and stack slot.
2927 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2928 getTargetMachine(), RVLocs, *DAG.getContext());
2930 // Analize return values.
2931 CCInfo.AnalyzeReturn(Outs, RetCC_Mips);
2933 // If this is the first return lowered for this function, add
2934 // the regs to the liveout set for the function.
2935 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
2936 for (unsigned i = 0; i != RVLocs.size(); ++i)
2937 if (RVLocs[i].isRegLoc())
2938 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
2943 // Copy the result values into the output registers.
2944 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2945 CCValAssign &VA = RVLocs[i];
2946 assert(VA.isRegLoc() && "Can only return in registers!");
2948 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), OutVals[i], Flag);
2950 // guarantee that all emitted copies are
2951 // stuck together, avoiding something bad
2952 Flag = Chain.getValue(1);
2955 // The mips ABIs for returning structs by value requires that we copy
2956 // the sret argument into $v0 for the return. We saved the argument into
2957 // a virtual register in the entry block, so now we copy the value out
2959 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
2960 MachineFunction &MF = DAG.getMachineFunction();
2961 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2962 unsigned Reg = MipsFI->getSRetReturnReg();
2965 llvm_unreachable("sret virtual register not created in the entry block");
2966 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
2968 Chain = DAG.getCopyToReg(Chain, dl, Mips::V0, Val, Flag);
2969 Flag = Chain.getValue(1);
2972 // Return on Mips is always a "jr $ra"
2974 return DAG.getNode(MipsISD::Ret, dl, MVT::Other,
2975 Chain, DAG.getRegister(Mips::RA, MVT::i32), Flag);
2977 return DAG.getNode(MipsISD::Ret, dl, MVT::Other,
2978 Chain, DAG.getRegister(Mips::RA, MVT::i32));
2981 //===----------------------------------------------------------------------===//
2982 // Mips Inline Assembly Support
2983 //===----------------------------------------------------------------------===//
2985 /// getConstraintType - Given a constraint letter, return the type of
2986 /// constraint it is for this target.
2987 MipsTargetLowering::ConstraintType MipsTargetLowering::
2988 getConstraintType(const std::string &Constraint) const
2990 // Mips specific constrainy
2991 // GCC config/mips/constraints.md
2993 // 'd' : An address register. Equivalent to r
2994 // unless generating MIPS16 code.
2995 // 'y' : Equivalent to r; retained for
2996 // backwards compatibility.
2997 // 'f' : Floating Point registers.
2998 if (Constraint.size() == 1) {
2999 switch (Constraint[0]) {
3004 return C_RegisterClass;
3007 return TargetLowering::getConstraintType(Constraint);
3010 /// Examine constraint type and operand type and determine a weight value.
3011 /// This object must already have been set up with the operand type
3012 /// and the current alternative constraint selected.
3013 TargetLowering::ConstraintWeight
3014 MipsTargetLowering::getSingleConstraintMatchWeight(
3015 AsmOperandInfo &info, const char *constraint) const {
3016 ConstraintWeight weight = CW_Invalid;
3017 Value *CallOperandVal = info.CallOperandVal;
3018 // If we don't have a value, we can't do a match,
3019 // but allow it at the lowest weight.
3020 if (CallOperandVal == NULL)
3022 Type *type = CallOperandVal->getType();
3023 // Look at the constraint type.
3024 switch (*constraint) {
3026 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
3030 if (type->isIntegerTy())
3031 weight = CW_Register;
3034 if (type->isFloatTy())
3035 weight = CW_Register;
3041 /// Given a register class constraint, like 'r', if this corresponds directly
3042 /// to an LLVM register class, return a register of 0 and the register class
3044 std::pair<unsigned, const TargetRegisterClass*> MipsTargetLowering::
3045 getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const
3047 if (Constraint.size() == 1) {
3048 switch (Constraint[0]) {
3049 case 'd': // Address register. Same as 'r' unless generating MIPS16 code.
3050 case 'y': // Same as 'r'. Exists for compatibility.
3053 return std::make_pair(0U, &Mips::CPURegsRegClass);
3054 assert(VT == MVT::i64 && "Unexpected type.");
3055 return std::make_pair(0U, &Mips::CPU64RegsRegClass);
3058 return std::make_pair(0U, &Mips::FGR32RegClass);
3059 if ((VT == MVT::f64) && (!Subtarget->isSingleFloat())) {
3060 if (Subtarget->isFP64bit())
3061 return std::make_pair(0U, &Mips::FGR64RegClass);
3062 return std::make_pair(0U, &Mips::AFGR64RegClass);
3066 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
3070 MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
3071 // The Mips target isn't yet aware of offsets.
3075 bool MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3076 if (VT != MVT::f32 && VT != MVT::f64)
3078 if (Imm.isNegZero())
3080 return Imm.isZero();
3083 unsigned MipsTargetLowering::getJumpTableEncoding() const {
3085 return MachineJumpTableInfo::EK_GPRel64BlockAddress;
3087 return TargetLowering::getJumpTableEncoding();