1 //===----- LegalizeIntegerTypes.cpp - Legalization of integer types -------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements integer type expansion and promotion for LegalizeTypes.
11 // Promotion is the act of changing a computation in an illegal type into a
12 // computation in a larger type. For example, implementing i8 arithmetic in an
13 // i32 register (often needed on powerpc).
14 // Expansion is the act of changing a computation in an illegal type into a
15 // computation in two identical registers of a smaller type. For example,
16 // implementing i64 arithmetic in two i32 registers (often needed on 32-bit
19 //===----------------------------------------------------------------------===//
21 #include "LegalizeTypes.h"
24 //===----------------------------------------------------------------------===//
25 // Integer Result Promotion
26 //===----------------------------------------------------------------------===//
28 /// PromoteIntegerResult - This method is called when a result of a node is
29 /// found to be in need of promotion to a larger type. At this point, the node
30 /// may also have invalid operands or may have other results that need
31 /// expansion, we just know that (at least) one result needs promotion.
32 void DAGTypeLegalizer::PromoteIntegerResult(SDNode *N, unsigned ResNo) {
33 DEBUG(cerr << "Promote integer result: "; N->dump(&DAG); cerr << "\n");
34 SDValue Res = SDValue();
36 // See if the target wants to custom expand this node.
37 if (CustomLowerResults(N, N->getValueType(ResNo), true))
40 switch (N->getOpcode()) {
43 cerr << "PromoteIntegerResult #" << ResNo << ": ";
44 N->dump(&DAG); cerr << "\n";
46 assert(0 && "Do not know how to promote this operator!");
48 case ISD::AssertSext: Res = PromoteIntRes_AssertSext(N); break;
49 case ISD::AssertZext: Res = PromoteIntRes_AssertZext(N); break;
50 case ISD::BIT_CONVERT: Res = PromoteIntRes_BIT_CONVERT(N); break;
51 case ISD::BSWAP: Res = PromoteIntRes_BSWAP(N); break;
52 case ISD::BUILD_PAIR: Res = PromoteIntRes_BUILD_PAIR(N); break;
53 case ISD::Constant: Res = PromoteIntRes_Constant(N); break;
54 case ISD::CONVERT_RNDSAT:
55 Res = PromoteIntRes_CONVERT_RNDSAT(N); break;
56 case ISD::CTLZ: Res = PromoteIntRes_CTLZ(N); break;
57 case ISD::CTPOP: Res = PromoteIntRes_CTPOP(N); break;
58 case ISD::CTTZ: Res = PromoteIntRes_CTTZ(N); break;
59 case ISD::EXTRACT_VECTOR_ELT:
60 Res = PromoteIntRes_EXTRACT_VECTOR_ELT(N); break;
61 case ISD::LOAD: Res = PromoteIntRes_LOAD(cast<LoadSDNode>(N));break;
62 case ISD::SELECT: Res = PromoteIntRes_SELECT(N); break;
63 case ISD::SELECT_CC: Res = PromoteIntRes_SELECT_CC(N); break;
64 case ISD::SETCC: Res = PromoteIntRes_SETCC(N); break;
65 case ISD::SHL: Res = PromoteIntRes_SHL(N); break;
66 case ISD::SIGN_EXTEND_INREG:
67 Res = PromoteIntRes_SIGN_EXTEND_INREG(N); break;
68 case ISD::SRA: Res = PromoteIntRes_SRA(N); break;
69 case ISD::SRL: Res = PromoteIntRes_SRL(N); break;
70 case ISD::TRUNCATE: Res = PromoteIntRes_TRUNCATE(N); break;
71 case ISD::UNDEF: Res = PromoteIntRes_UNDEF(N); break;
72 case ISD::VAARG: Res = PromoteIntRes_VAARG(N); break;
74 case ISD::SIGN_EXTEND:
75 case ISD::ZERO_EXTEND:
76 case ISD::ANY_EXTEND: Res = PromoteIntRes_INT_EXTEND(N); break;
79 case ISD::FP_TO_UINT: Res = PromoteIntRes_FP_TO_XINT(N); break;
86 case ISD::MUL: Res = PromoteIntRes_SimpleIntBinOp(N); break;
89 case ISD::SREM: Res = PromoteIntRes_SDIV(N); break;
92 case ISD::UREM: Res = PromoteIntRes_UDIV(N); break;
95 case ISD::SSUBO: Res = PromoteIntRes_SADDSUBO(N, ResNo); break;
97 case ISD::USUBO: Res = PromoteIntRes_UADDSUBO(N, ResNo); break;
99 case ISD::UMULO: Res = PromoteIntRes_XMULO(N, ResNo); break;
101 case ISD::ATOMIC_LOAD_ADD:
102 case ISD::ATOMIC_LOAD_SUB:
103 case ISD::ATOMIC_LOAD_AND:
104 case ISD::ATOMIC_LOAD_OR:
105 case ISD::ATOMIC_LOAD_XOR:
106 case ISD::ATOMIC_LOAD_NAND:
107 case ISD::ATOMIC_LOAD_MIN:
108 case ISD::ATOMIC_LOAD_MAX:
109 case ISD::ATOMIC_LOAD_UMIN:
110 case ISD::ATOMIC_LOAD_UMAX:
111 case ISD::ATOMIC_SWAP:
112 Res = PromoteIntRes_Atomic1(cast<AtomicSDNode>(N)); break;
114 case ISD::ATOMIC_CMP_SWAP:
115 Res = PromoteIntRes_Atomic2(cast<AtomicSDNode>(N)); break;
118 // If the result is null then the sub-method took care of registering it.
120 SetPromotedInteger(SDValue(N, ResNo), Res);
123 SDValue DAGTypeLegalizer::PromoteIntRes_AssertSext(SDNode *N) {
124 // Sign-extend the new bits, and continue the assertion.
125 SDValue Op = SExtPromotedInteger(N->getOperand(0));
126 return DAG.getNode(ISD::AssertSext, N->getDebugLoc(),
127 Op.getValueType(), Op, N->getOperand(1));
130 SDValue DAGTypeLegalizer::PromoteIntRes_AssertZext(SDNode *N) {
131 // Zero the new bits, and continue the assertion.
132 SDValue Op = ZExtPromotedInteger(N->getOperand(0));
133 return DAG.getNode(ISD::AssertZext, N->getDebugLoc(),
134 Op.getValueType(), Op, N->getOperand(1));
137 SDValue DAGTypeLegalizer::PromoteIntRes_Atomic1(AtomicSDNode *N) {
138 SDValue Op2 = GetPromotedInteger(N->getOperand(2));
139 SDValue Res = DAG.getAtomic(N->getOpcode(), N->getDebugLoc(),
141 N->getChain(), N->getBasePtr(),
142 Op2, N->getSrcValue(), N->getAlignment());
143 // Legalized the chain result - switch anything that used the old chain to
145 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
149 SDValue DAGTypeLegalizer::PromoteIntRes_Atomic2(AtomicSDNode *N) {
150 SDValue Op2 = GetPromotedInteger(N->getOperand(2));
151 SDValue Op3 = GetPromotedInteger(N->getOperand(3));
152 SDValue Res = DAG.getAtomic(N->getOpcode(), N->getMemoryVT(),
153 N->getChain(), N->getBasePtr(),
154 Op2, Op3, N->getSrcValue(), N->getAlignment());
155 // Legalized the chain result - switch anything that used the old chain to
157 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
161 SDValue DAGTypeLegalizer::PromoteIntRes_BIT_CONVERT(SDNode *N) {
162 SDValue InOp = N->getOperand(0);
163 MVT InVT = InOp.getValueType();
164 MVT NInVT = TLI.getTypeToTransformTo(InVT);
165 MVT OutVT = N->getValueType(0);
166 MVT NOutVT = TLI.getTypeToTransformTo(OutVT);
167 DebugLoc dl = N->getDebugLoc();
169 switch (getTypeAction(InVT)) {
171 assert(false && "Unknown type action!");
176 if (NOutVT.bitsEq(NInVT))
177 // The input promotes to the same size. Convert the promoted value.
178 return DAG.getNode(ISD::BIT_CONVERT, dl,
179 NOutVT, GetPromotedInteger(InOp));
182 // Promote the integer operand by hand.
183 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT, GetSoftenedFloat(InOp));
187 case ScalarizeVector:
188 // Convert the element to an integer and promote it by hand.
189 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT,
190 BitConvertToInteger(GetScalarizedVector(InOp)));
192 // For example, i32 = BIT_CONVERT v2i16 on alpha. Convert the split
193 // pieces of the input into integers and reassemble in the final type.
195 GetSplitVector(N->getOperand(0), Lo, Hi);
196 Lo = BitConvertToInteger(Lo);
197 Hi = BitConvertToInteger(Hi);
199 if (TLI.isBigEndian())
202 InOp = DAG.getNode(ISD::ANY_EXTEND, dl,
203 MVT::getIntegerVT(NOutVT.getSizeInBits()),
204 JoinIntegers(Lo, Hi));
205 return DAG.getNode(ISD::BIT_CONVERT, dl, NOutVT, InOp);
208 if (OutVT.bitsEq(NInVT))
209 // The input is widened to the same size. Convert to the widened value.
210 return DAG.getNode(ISD::BIT_CONVERT, dl, OutVT, GetWidenedVector(InOp));
213 // Otherwise, lower the bit-convert to a store/load from the stack.
214 // Create the stack frame object. Make sure it is aligned for both
215 // the source and destination types.
216 SDValue FIPtr = DAG.CreateStackTemporary(InVT, OutVT);
218 // Emit a store to the stack slot.
219 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, InOp, FIPtr, NULL, 0);
221 // Result is an extending load from the stack slot.
222 return DAG.getExtLoad(ISD::EXTLOAD, dl, NOutVT, Store, FIPtr, NULL, 0, OutVT);
225 SDValue DAGTypeLegalizer::PromoteIntRes_BSWAP(SDNode *N) {
226 SDValue Op = GetPromotedInteger(N->getOperand(0));
227 MVT OVT = N->getValueType(0);
228 MVT NVT = Op.getValueType();
229 DebugLoc dl = N->getDebugLoc();
231 unsigned DiffBits = NVT.getSizeInBits() - OVT.getSizeInBits();
232 return DAG.getNode(ISD::SRL, dl, NVT, DAG.getNode(ISD::BSWAP, dl, NVT, Op),
233 DAG.getConstant(DiffBits, TLI.getShiftAmountTy()));
236 SDValue DAGTypeLegalizer::PromoteIntRes_BUILD_PAIR(SDNode *N) {
237 // The pair element type may be legal, or may not promote to the same type as
238 // the result, for example i14 = BUILD_PAIR (i7, i7). Handle all cases.
239 return DAG.getNode(ISD::ANY_EXTEND, N->getDebugLoc(),
240 TLI.getTypeToTransformTo(N->getValueType(0)),
241 JoinIntegers(N->getOperand(0), N->getOperand(1)));
244 SDValue DAGTypeLegalizer::PromoteIntRes_Constant(SDNode *N) {
245 MVT VT = N->getValueType(0);
246 // Zero extend things like i1, sign extend everything else. It shouldn't
247 // matter in theory which one we pick, but this tends to give better code?
248 unsigned Opc = VT.isByteSized() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
249 SDValue Result = DAG.getNode(Opc, TLI.getTypeToTransformTo(VT),
251 assert(isa<ConstantSDNode>(Result) && "Didn't constant fold ext?");
255 SDValue DAGTypeLegalizer::PromoteIntRes_CONVERT_RNDSAT(SDNode *N) {
256 ISD::CvtCode CvtCode = cast<CvtRndSatSDNode>(N)->getCvtCode();
257 assert ((CvtCode == ISD::CVT_SS || CvtCode == ISD::CVT_SU ||
258 CvtCode == ISD::CVT_US || CvtCode == ISD::CVT_UU ||
259 CvtCode == ISD::CVT_SF || CvtCode == ISD::CVT_UF) &&
260 "can only promote integers");
261 MVT OutVT = TLI.getTypeToTransformTo(N->getValueType(0));
262 return DAG.getConvertRndSat(OutVT, N->getOperand(0),
263 N->getOperand(1), N->getOperand(2),
264 N->getOperand(3), N->getOperand(4), CvtCode);
267 SDValue DAGTypeLegalizer::PromoteIntRes_CTLZ(SDNode *N) {
268 // Zero extend to the promoted type and do the count there.
269 SDValue Op = ZExtPromotedInteger(N->getOperand(0));
270 MVT OVT = N->getValueType(0);
271 MVT NVT = Op.getValueType();
272 Op = DAG.getNode(ISD::CTLZ, NVT, Op);
273 // Subtract off the extra leading bits in the bigger type.
274 return DAG.getNode(ISD::SUB, N->getDebugLoc(), NVT, Op,
275 DAG.getConstant(NVT.getSizeInBits() -
276 OVT.getSizeInBits(), NVT));
279 SDValue DAGTypeLegalizer::PromoteIntRes_CTPOP(SDNode *N) {
280 // Zero extend to the promoted type and do the count there.
281 SDValue Op = ZExtPromotedInteger(N->getOperand(0));
282 return DAG.getNode(ISD::CTPOP, N->getDebugLoc(), Op.getValueType(), Op);
285 SDValue DAGTypeLegalizer::PromoteIntRes_CTTZ(SDNode *N) {
286 SDValue Op = GetPromotedInteger(N->getOperand(0));
287 MVT OVT = N->getValueType(0);
288 MVT NVT = Op.getValueType();
289 DebugLoc dl = N->getDebugLoc();
290 // The count is the same in the promoted type except if the original
291 // value was zero. This can be handled by setting the bit just off
292 // the top of the original type.
293 APInt TopBit(NVT.getSizeInBits(), 0);
294 TopBit.set(OVT.getSizeInBits());
295 Op = DAG.getNode(ISD::OR, dl, NVT, Op, DAG.getConstant(TopBit, NVT));
296 return DAG.getNode(ISD::CTTZ, dl, NVT, Op);
299 SDValue DAGTypeLegalizer::PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N) {
300 MVT OldVT = N->getValueType(0);
301 SDValue OldVec = N->getOperand(0);
302 if (getTypeAction(OldVec.getValueType()) == WidenVector)
303 OldVec = GetWidenedVector(N->getOperand(0));
304 unsigned OldElts = OldVec.getValueType().getVectorNumElements();
305 DebugLoc dl = N->getDebugLoc();
308 assert(!isTypeLegal(OldVec.getValueType()) &&
309 "Legal one-element vector of a type needing promotion!");
310 // It is tempting to follow GetScalarizedVector by a call to
311 // GetPromotedInteger, but this would be wrong because the
312 // scalarized value may not yet have been processed.
313 return DAG.getNode(ISD::ANY_EXTEND, dl, TLI.getTypeToTransformTo(OldVT),
314 GetScalarizedVector(OldVec));
317 // Convert to a vector half as long with an element type of twice the width,
318 // for example <4 x i16> -> <2 x i32>.
319 assert(!(OldElts & 1) && "Odd length vectors not supported!");
320 MVT NewVT = MVT::getIntegerVT(2 * OldVT.getSizeInBits());
321 assert(OldVT.isSimple() && NewVT.isSimple());
323 SDValue NewVec = DAG.getNode(ISD::BIT_CONVERT, dl,
324 MVT::getVectorVT(NewVT, OldElts / 2),
327 // Extract the element at OldIdx / 2 from the new vector.
328 SDValue OldIdx = N->getOperand(1);
329 SDValue NewIdx = DAG.getNode(ISD::SRL, dl, OldIdx.getValueType(), OldIdx,
330 DAG.getConstant(1, TLI.getShiftAmountTy()));
331 SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NewVT, NewVec, NewIdx);
333 // Select the appropriate half of the element: Lo if OldIdx was even,
336 SDValue Hi = DAG.getNode(ISD::SRL, dl, NewVT, Elt,
337 DAG.getConstant(OldVT.getSizeInBits(),
338 TLI.getShiftAmountTy()));
339 if (TLI.isBigEndian())
342 // Extend to the promoted type.
343 SDValue Odd = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, OldIdx);
344 SDValue Res = DAG.getNode(ISD::SELECT, dl, NewVT, Odd, Hi, Lo);
345 return DAG.getNode(ISD::ANY_EXTEND, dl, TLI.getTypeToTransformTo(OldVT), Res);
348 SDValue DAGTypeLegalizer::PromoteIntRes_FP_TO_XINT(SDNode *N) {
349 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
350 unsigned NewOpc = N->getOpcode();
351 DebugLoc dl = N->getDebugLoc();
353 // If we're promoting a UINT to a larger size, check to see if the new node
354 // will be legal. If it isn't, check to see if FP_TO_SINT is legal, since
355 // we can use that instead. This allows us to generate better code for
356 // FP_TO_UINT for small destination sizes on targets where FP_TO_UINT is not
357 // legal, such as PowerPC.
358 if (N->getOpcode() == ISD::FP_TO_UINT &&
359 !TLI.isOperationLegalOrCustom(ISD::FP_TO_UINT, NVT) &&
360 TLI.isOperationLegalOrCustom(ISD::FP_TO_SINT, NVT))
361 NewOpc = ISD::FP_TO_SINT;
363 SDValue Res = DAG.getNode(NewOpc, dl, NVT, N->getOperand(0));
365 // Assert that the converted value fits in the original type. If it doesn't
366 // (eg: because the value being converted is too big), then the result of the
367 // original operation was undefined anyway, so the assert is still correct.
368 return DAG.getNode(N->getOpcode() == ISD::FP_TO_UINT ?
369 ISD::AssertZext : ISD::AssertSext, dl,
370 NVT, Res, DAG.getValueType(N->getValueType(0)));
373 SDValue DAGTypeLegalizer::PromoteIntRes_INT_EXTEND(SDNode *N) {
374 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
375 DebugLoc dl = N->getDebugLoc();
377 if (getTypeAction(N->getOperand(0).getValueType()) == PromoteInteger) {
378 SDValue Res = GetPromotedInteger(N->getOperand(0));
379 assert(Res.getValueType().bitsLE(NVT) && "Extension doesn't make sense!");
381 // If the result and operand types are the same after promotion, simplify
382 // to an in-register extension.
383 if (NVT == Res.getValueType()) {
384 // The high bits are not guaranteed to be anything. Insert an extend.
385 if (N->getOpcode() == ISD::SIGN_EXTEND)
386 return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NVT, Res,
387 DAG.getValueType(N->getOperand(0).getValueType()));
388 if (N->getOpcode() == ISD::ZERO_EXTEND)
389 return DAG.getZeroExtendInReg(Res, N->getOperand(0).getValueType());
390 assert(N->getOpcode() == ISD::ANY_EXTEND && "Unknown integer extension!");
395 // Otherwise, just extend the original operand all the way to the larger type.
396 return DAG.getNode(N->getOpcode(), dl, NVT, N->getOperand(0));
399 SDValue DAGTypeLegalizer::PromoteIntRes_LOAD(LoadSDNode *N) {
400 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
401 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
402 ISD::LoadExtType ExtType =
403 ISD::isNON_EXTLoad(N) ? ISD::EXTLOAD : N->getExtensionType();
404 DebugLoc dl = N->getDebugLoc();
405 SDValue Res = DAG.getExtLoad(ExtType, dl, NVT, N->getChain(), N->getBasePtr(),
406 N->getSrcValue(), N->getSrcValueOffset(),
407 N->getMemoryVT(), N->isVolatile(),
410 // Legalized the chain result - switch anything that used the old chain to
412 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
416 /// Promote the overflow flag of an overflowing arithmetic node.
417 SDValue DAGTypeLegalizer::PromoteIntRes_Overflow(SDNode *N) {
418 // Simply change the return type of the boolean result.
419 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(1));
420 MVT ValueVTs[] = { N->getValueType(0), NVT };
421 SDValue Ops[] = { N->getOperand(0), N->getOperand(1) };
422 SDValue Res = DAG.getNode(N->getOpcode(), N->getDebugLoc(),
423 DAG.getVTList(ValueVTs, 2), Ops, 2);
425 // Modified the sum result - switch anything that used the old sum to use
427 ReplaceValueWith(SDValue(N, 0), Res);
429 return SDValue(Res.getNode(), 1);
432 SDValue DAGTypeLegalizer::PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo) {
434 return PromoteIntRes_Overflow(N);
436 // The operation overflowed iff the result in the larger type is not the
437 // sign extension of its truncation to the original type.
438 SDValue LHS = SExtPromotedInteger(N->getOperand(0));
439 SDValue RHS = SExtPromotedInteger(N->getOperand(1));
440 MVT OVT = N->getOperand(0).getValueType();
441 MVT NVT = LHS.getValueType();
442 DebugLoc dl = N->getDebugLoc();
444 // Do the arithmetic in the larger type.
445 unsigned Opcode = N->getOpcode() == ISD::SADDO ? ISD::ADD : ISD::SUB;
446 SDValue Res = DAG.getNode(Opcode, dl, NVT, LHS, RHS);
448 // Calculate the overflow flag: sign extend the arithmetic result from
449 // the original type.
450 SDValue Ofl = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NVT, Res,
451 DAG.getValueType(OVT));
452 // Overflowed if and only if this is not equal to Res.
453 Ofl = DAG.getSetCC(dl, N->getValueType(1), Ofl, Res, ISD::SETNE);
455 // Use the calculated overflow everywhere.
456 ReplaceValueWith(SDValue(N, 1), Ofl);
461 SDValue DAGTypeLegalizer::PromoteIntRes_SDIV(SDNode *N) {
462 // Sign extend the input.
463 SDValue LHS = SExtPromotedInteger(N->getOperand(0));
464 SDValue RHS = SExtPromotedInteger(N->getOperand(1));
465 return DAG.getNode(N->getOpcode(), N->getDebugLoc(),
466 LHS.getValueType(), LHS, RHS);
469 SDValue DAGTypeLegalizer::PromoteIntRes_SELECT(SDNode *N) {
470 SDValue LHS = GetPromotedInteger(N->getOperand(1));
471 SDValue RHS = GetPromotedInteger(N->getOperand(2));
472 return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
473 LHS.getValueType(), N->getOperand(0),LHS,RHS);
476 SDValue DAGTypeLegalizer::PromoteIntRes_SELECT_CC(SDNode *N) {
477 SDValue LHS = GetPromotedInteger(N->getOperand(2));
478 SDValue RHS = GetPromotedInteger(N->getOperand(3));
479 return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
480 LHS.getValueType(), N->getOperand(0),
481 N->getOperand(1), LHS, RHS, N->getOperand(4));
484 SDValue DAGTypeLegalizer::PromoteIntRes_SETCC(SDNode *N) {
485 MVT SVT = TLI.getSetCCResultType(N->getOperand(0).getValueType());
486 assert(isTypeLegal(SVT) && "Illegal SetCC type!");
487 DebugLoc dl = N->getDebugLoc();
489 // Get the SETCC result using the canonical SETCC type.
490 SDValue SetCC = DAG.getNode(ISD::SETCC, dl, SVT, N->getOperand(0),
491 N->getOperand(1), N->getOperand(2));
493 // Convert to the expected type.
494 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
495 assert(NVT.bitsLE(SVT) && "Integer type overpromoted?");
496 return DAG.getNode(ISD::TRUNCATE, dl, NVT, SetCC);
499 SDValue DAGTypeLegalizer::PromoteIntRes_SHL(SDNode *N) {
500 return DAG.getNode(ISD::SHL, N->getDebugLoc(),
501 TLI.getTypeToTransformTo(N->getValueType(0)),
502 GetPromotedInteger(N->getOperand(0)), N->getOperand(1));
505 SDValue DAGTypeLegalizer::PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N) {
506 SDValue Op = GetPromotedInteger(N->getOperand(0));
507 return DAG.getNode(ISD::SIGN_EXTEND_INREG, N->getDebugLoc(),
508 Op.getValueType(), Op, N->getOperand(1));
511 SDValue DAGTypeLegalizer::PromoteIntRes_SimpleIntBinOp(SDNode *N) {
512 // The input may have strange things in the top bits of the registers, but
513 // these operations don't care. They may have weird bits going out, but
514 // that too is okay if they are integer operations.
515 SDValue LHS = GetPromotedInteger(N->getOperand(0));
516 SDValue RHS = GetPromotedInteger(N->getOperand(1));
517 return DAG.getNode(N->getOpcode(), N->getDebugLoc(),
518 LHS.getValueType(), LHS, RHS);
521 SDValue DAGTypeLegalizer::PromoteIntRes_SRA(SDNode *N) {
522 // The input value must be properly sign extended.
523 SDValue Res = SExtPromotedInteger(N->getOperand(0));
524 return DAG.getNode(ISD::SRA, N->getDebugLoc(),
525 Res.getValueType(), Res, N->getOperand(1));
528 SDValue DAGTypeLegalizer::PromoteIntRes_SRL(SDNode *N) {
529 // The input value must be properly zero extended.
530 MVT VT = N->getValueType(0);
531 MVT NVT = TLI.getTypeToTransformTo(VT);
532 SDValue Res = ZExtPromotedInteger(N->getOperand(0));
533 return DAG.getNode(ISD::SRL, N->getDebugLoc(), NVT, Res, N->getOperand(1));
536 SDValue DAGTypeLegalizer::PromoteIntRes_TRUNCATE(SDNode *N) {
537 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
540 switch (getTypeAction(N->getOperand(0).getValueType())) {
541 default: assert(0 && "Unknown type action!");
544 Res = N->getOperand(0);
547 Res = GetPromotedInteger(N->getOperand(0));
551 // Truncate to NVT instead of VT
552 return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), NVT, Res);
555 SDValue DAGTypeLegalizer::PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo) {
557 return PromoteIntRes_Overflow(N);
559 // The operation overflowed iff the result in the larger type is not the
560 // zero extension of its truncation to the original type.
561 SDValue LHS = ZExtPromotedInteger(N->getOperand(0));
562 SDValue RHS = ZExtPromotedInteger(N->getOperand(1));
563 MVT OVT = N->getOperand(0).getValueType();
564 MVT NVT = LHS.getValueType();
565 DebugLoc dl = N->getDebugLoc();
567 // Do the arithmetic in the larger type.
568 unsigned Opcode = N->getOpcode() == ISD::UADDO ? ISD::ADD : ISD::SUB;
569 SDValue Res = DAG.getNode(Opcode, dl, NVT, LHS, RHS);
571 // Calculate the overflow flag: zero extend the arithmetic result from
572 // the original type.
573 SDValue Ofl = DAG.getZeroExtendInReg(Res, OVT);
574 // Overflowed if and only if this is not equal to Res.
575 Ofl = DAG.getSetCC(dl, N->getValueType(1), Ofl, Res, ISD::SETNE);
577 // Use the calculated overflow everywhere.
578 ReplaceValueWith(SDValue(N, 1), Ofl);
583 SDValue DAGTypeLegalizer::PromoteIntRes_UDIV(SDNode *N) {
584 // Zero extend the input.
585 SDValue LHS = ZExtPromotedInteger(N->getOperand(0));
586 SDValue RHS = ZExtPromotedInteger(N->getOperand(1));
587 return DAG.getNode(N->getOpcode(), N->getDebugLoc(),
588 LHS.getValueType(), LHS, RHS);
591 SDValue DAGTypeLegalizer::PromoteIntRes_UNDEF(SDNode *N) {
592 return DAG.getNode(ISD::UNDEF, N->getDebugLoc(),
593 TLI.getTypeToTransformTo(N->getValueType(0)));
596 SDValue DAGTypeLegalizer::PromoteIntRes_VAARG(SDNode *N) {
597 SDValue Chain = N->getOperand(0); // Get the chain.
598 SDValue Ptr = N->getOperand(1); // Get the pointer.
599 MVT VT = N->getValueType(0);
600 DebugLoc dl = N->getDebugLoc();
602 MVT RegVT = TLI.getRegisterType(VT);
603 unsigned NumRegs = TLI.getNumRegisters(VT);
604 // The argument is passed as NumRegs registers of type RegVT.
606 SmallVector<SDValue, 8> Parts(NumRegs);
607 for (unsigned i = 0; i < NumRegs; ++i) {
608 Parts[i] = DAG.getVAArg(RegVT, Chain, Ptr, N->getOperand(2));
609 Chain = Parts[i].getValue(1);
612 // Handle endianness of the load.
613 if (TLI.isBigEndian())
614 std::reverse(Parts.begin(), Parts.end());
616 // Assemble the parts in the promoted type.
617 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
618 SDValue Res = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, Parts[0]);
619 for (unsigned i = 1; i < NumRegs; ++i) {
620 SDValue Part = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, Parts[i]);
621 // Shift it to the right position and "or" it in.
622 Part = DAG.getNode(ISD::SHL, dl, NVT, Part,
623 DAG.getConstant(i * RegVT.getSizeInBits(),
624 TLI.getShiftAmountTy()));
625 Res = DAG.getNode(ISD::OR, dl, NVT, Res, Part);
628 // Modified the chain result - switch anything that used the old chain to
630 ReplaceValueWith(SDValue(N, 1), Chain);
635 SDValue DAGTypeLegalizer::PromoteIntRes_XMULO(SDNode *N, unsigned ResNo) {
636 assert(ResNo == 1 && "Only boolean result promotion currently supported!");
637 return PromoteIntRes_Overflow(N);
640 //===----------------------------------------------------------------------===//
641 // Integer Operand Promotion
642 //===----------------------------------------------------------------------===//
644 /// PromoteIntegerOperand - This method is called when the specified operand of
645 /// the specified node is found to need promotion. At this point, all of the
646 /// result types of the node are known to be legal, but other operands of the
647 /// node may need promotion or expansion as well as the specified one.
648 bool DAGTypeLegalizer::PromoteIntegerOperand(SDNode *N, unsigned OpNo) {
649 DEBUG(cerr << "Promote integer operand: "; N->dump(&DAG); cerr << "\n");
650 SDValue Res = SDValue();
652 if (CustomLowerResults(N, N->getOperand(OpNo).getValueType(), false))
655 switch (N->getOpcode()) {
658 cerr << "PromoteIntegerOperand Op #" << OpNo << ": ";
659 N->dump(&DAG); cerr << "\n";
661 assert(0 && "Do not know how to promote this operator's operand!");
664 case ISD::ANY_EXTEND: Res = PromoteIntOp_ANY_EXTEND(N); break;
665 case ISD::BR_CC: Res = PromoteIntOp_BR_CC(N, OpNo); break;
666 case ISD::BRCOND: Res = PromoteIntOp_BRCOND(N, OpNo); break;
667 case ISD::BUILD_PAIR: Res = PromoteIntOp_BUILD_PAIR(N); break;
668 case ISD::BUILD_VECTOR: Res = PromoteIntOp_BUILD_VECTOR(N); break;
669 case ISD::CONVERT_RNDSAT:
670 Res = PromoteIntOp_CONVERT_RNDSAT(N); break;
671 case ISD::INSERT_VECTOR_ELT:
672 Res = PromoteIntOp_INSERT_VECTOR_ELT(N, OpNo);break;
673 case ISD::MEMBARRIER: Res = PromoteIntOp_MEMBARRIER(N); break;
674 case ISD::SELECT: Res = PromoteIntOp_SELECT(N, OpNo); break;
675 case ISD::SELECT_CC: Res = PromoteIntOp_SELECT_CC(N, OpNo); break;
676 case ISD::SETCC: Res = PromoteIntOp_SETCC(N, OpNo); break;
677 case ISD::SIGN_EXTEND: Res = PromoteIntOp_SIGN_EXTEND(N); break;
678 case ISD::SINT_TO_FP: Res = PromoteIntOp_SINT_TO_FP(N); break;
679 case ISD::STORE: Res = PromoteIntOp_STORE(cast<StoreSDNode>(N),
681 case ISD::TRUNCATE: Res = PromoteIntOp_TRUNCATE(N); break;
682 case ISD::UINT_TO_FP: Res = PromoteIntOp_UINT_TO_FP(N); break;
683 case ISD::ZERO_EXTEND: Res = PromoteIntOp_ZERO_EXTEND(N); break;
686 // If the result is null, the sub-method took care of registering results etc.
687 if (!Res.getNode()) return false;
689 // If the result is N, the sub-method updated N in place. Tell the legalizer
691 if (Res.getNode() == N)
694 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
695 "Invalid operand expansion");
697 ReplaceValueWith(SDValue(N, 0), Res);
701 /// PromoteSetCCOperands - Promote the operands of a comparison. This code is
702 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
703 void DAGTypeLegalizer::PromoteSetCCOperands(SDValue &NewLHS,SDValue &NewRHS,
704 ISD::CondCode CCCode) {
705 // We have to insert explicit sign or zero extends. Note that we could
706 // insert sign extends for ALL conditions, but zero extend is cheaper on
707 // many machines (an AND instead of two shifts), so prefer it.
709 default: assert(0 && "Unknown integer comparison!");
716 // ALL of these operations will work if we either sign or zero extend
717 // the operands (including the unsigned comparisons!). Zero extend is
718 // usually a simpler/cheaper operation, so prefer it.
719 NewLHS = ZExtPromotedInteger(NewLHS);
720 NewRHS = ZExtPromotedInteger(NewRHS);
726 NewLHS = SExtPromotedInteger(NewLHS);
727 NewRHS = SExtPromotedInteger(NewRHS);
732 SDValue DAGTypeLegalizer::PromoteIntOp_ANY_EXTEND(SDNode *N) {
733 SDValue Op = GetPromotedInteger(N->getOperand(0));
734 return DAG.getNode(ISD::ANY_EXTEND, N->getDebugLoc(), N->getValueType(0), Op);
737 SDValue DAGTypeLegalizer::PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo) {
738 assert(OpNo == 2 && "Don't know how to promote this operand!");
740 SDValue LHS = N->getOperand(2);
741 SDValue RHS = N->getOperand(3);
742 PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(1))->get());
744 // The chain (Op#0), CC (#1) and basic block destination (Op#4) are always
746 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
747 N->getOperand(1), LHS, RHS, N->getOperand(4));
750 SDValue DAGTypeLegalizer::PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo) {
751 assert(OpNo == 1 && "only know how to promote condition");
753 // Promote all the way up to the canonical SetCC type.
754 MVT SVT = TLI.getSetCCResultType(MVT::Other);
755 SDValue Cond = PromoteTargetBoolean(N->getOperand(1), SVT);
757 // The chain (Op#0) and basic block destination (Op#2) are always legal types.
758 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0), Cond,
762 SDValue DAGTypeLegalizer::PromoteIntOp_BUILD_PAIR(SDNode *N) {
763 // Since the result type is legal, the operands must promote to it.
764 MVT OVT = N->getOperand(0).getValueType();
765 SDValue Lo = ZExtPromotedInteger(N->getOperand(0));
766 SDValue Hi = GetPromotedInteger(N->getOperand(1));
767 assert(Lo.getValueType() == N->getValueType(0) && "Operand over promoted?");
768 DebugLoc dl = N->getDebugLoc();
770 Hi = DAG.getNode(ISD::SHL, dl, N->getValueType(0), Hi,
771 DAG.getConstant(OVT.getSizeInBits(),
772 TLI.getShiftAmountTy()));
773 return DAG.getNode(ISD::OR, dl, N->getValueType(0), Lo, Hi);
776 SDValue DAGTypeLegalizer::PromoteIntOp_BUILD_VECTOR(SDNode *N) {
777 // The vector type is legal but the element type is not. This implies
778 // that the vector is a power-of-two in length and that the element
779 // type does not have a strange size (eg: it is not i1).
780 MVT VecVT = N->getValueType(0);
781 unsigned NumElts = VecVT.getVectorNumElements();
782 assert(!(NumElts & 1) && "Legal vector of one illegal element?");
783 DebugLoc dl = N->getDebugLoc();
785 // Build a vector of half the length out of elements of twice the bitwidth.
786 // For example <4 x i16> -> <2 x i32>.
787 MVT OldVT = N->getOperand(0).getValueType();
788 MVT NewVT = MVT::getIntegerVT(2 * OldVT.getSizeInBits());
789 assert(OldVT.isSimple() && NewVT.isSimple());
791 std::vector<SDValue> NewElts;
792 NewElts.reserve(NumElts/2);
794 for (unsigned i = 0; i < NumElts; i += 2) {
795 // Combine two successive elements into one promoted element.
796 SDValue Lo = N->getOperand(i);
797 SDValue Hi = N->getOperand(i+1);
798 if (TLI.isBigEndian())
800 NewElts.push_back(JoinIntegers(Lo, Hi));
803 SDValue NewVec = DAG.getNode(ISD::BUILD_VECTOR, dl,
804 MVT::getVectorVT(NewVT, NewElts.size()),
805 &NewElts[0], NewElts.size());
807 // Convert the new vector to the old vector type.
808 return DAG.getNode(ISD::BIT_CONVERT, dl, VecVT, NewVec);
811 SDValue DAGTypeLegalizer::PromoteIntOp_CONVERT_RNDSAT(SDNode *N) {
812 ISD::CvtCode CvtCode = cast<CvtRndSatSDNode>(N)->getCvtCode();
813 assert ((CvtCode == ISD::CVT_SS || CvtCode == ISD::CVT_SU ||
814 CvtCode == ISD::CVT_US || CvtCode == ISD::CVT_UU ||
815 CvtCode == ISD::CVT_FS || CvtCode == ISD::CVT_FU) &&
816 "can only promote integer arguments");
817 SDValue InOp = GetPromotedInteger(N->getOperand(0));
818 return DAG.getConvertRndSat(N->getValueType(0), InOp,
819 N->getOperand(1), N->getOperand(2),
820 N->getOperand(3), N->getOperand(4), CvtCode);
823 SDValue DAGTypeLegalizer::PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N,
826 // Promote the inserted value. This is valid because the type does not
827 // have to match the vector element type.
829 // Check that any extra bits introduced will be truncated away.
830 assert(N->getOperand(1).getValueType().getSizeInBits() >=
831 N->getValueType(0).getVectorElementType().getSizeInBits() &&
832 "Type of inserted value narrower than vector element type!");
833 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
834 GetPromotedInteger(N->getOperand(1)),
838 assert(OpNo == 2 && "Different operand and result vector types?");
840 // Promote the index.
841 SDValue Idx = ZExtPromotedInteger(N->getOperand(2));
842 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
843 N->getOperand(1), Idx);
846 SDValue DAGTypeLegalizer::PromoteIntOp_MEMBARRIER(SDNode *N) {
848 NewOps[0] = N->getOperand(0);
849 for (unsigned i = 1; i < array_lengthof(NewOps); ++i) {
850 SDValue Flag = GetPromotedInteger(N->getOperand(i));
851 NewOps[i] = DAG.getZeroExtendInReg(Flag, MVT::i1);
853 return DAG.UpdateNodeOperands(SDValue (N, 0), NewOps,
854 array_lengthof(NewOps));
857 SDValue DAGTypeLegalizer::PromoteIntOp_SELECT(SDNode *N, unsigned OpNo) {
858 assert(OpNo == 0 && "Only know how to promote condition");
860 // Promote all the way up to the canonical SetCC type.
861 MVT SVT = TLI.getSetCCResultType(N->getOperand(1).getValueType());
862 SDValue Cond = PromoteTargetBoolean(N->getOperand(0), SVT);
864 return DAG.UpdateNodeOperands(SDValue(N, 0), Cond,
865 N->getOperand(1), N->getOperand(2));
868 SDValue DAGTypeLegalizer::PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo) {
869 assert(OpNo == 0 && "Don't know how to promote this operand!");
871 SDValue LHS = N->getOperand(0);
872 SDValue RHS = N->getOperand(1);
873 PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(4))->get());
875 // The CC (#4) and the possible return values (#2 and #3) have legal types.
876 return DAG.UpdateNodeOperands(SDValue(N, 0), LHS, RHS, N->getOperand(2),
877 N->getOperand(3), N->getOperand(4));
880 SDValue DAGTypeLegalizer::PromoteIntOp_SETCC(SDNode *N, unsigned OpNo) {
881 assert(OpNo == 0 && "Don't know how to promote this operand!");
883 SDValue LHS = N->getOperand(0);
884 SDValue RHS = N->getOperand(1);
885 PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(2))->get());
887 // The CC (#2) is always legal.
888 return DAG.UpdateNodeOperands(SDValue(N, 0), LHS, RHS, N->getOperand(2));
891 SDValue DAGTypeLegalizer::PromoteIntOp_SIGN_EXTEND(SDNode *N) {
892 SDValue Op = GetPromotedInteger(N->getOperand(0));
893 DebugLoc dl = N->getDebugLoc();
894 Op = DAG.getNode(ISD::ANY_EXTEND, dl, N->getValueType(0), Op);
895 return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Op.getValueType(),
896 Op, DAG.getValueType(N->getOperand(0).getValueType()));
899 SDValue DAGTypeLegalizer::PromoteIntOp_SINT_TO_FP(SDNode *N) {
900 return DAG.UpdateNodeOperands(SDValue(N, 0),
901 SExtPromotedInteger(N->getOperand(0)));
904 SDValue DAGTypeLegalizer::PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo){
905 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
906 SDValue Ch = N->getChain(), Ptr = N->getBasePtr();
907 int SVOffset = N->getSrcValueOffset();
908 unsigned Alignment = N->getAlignment();
909 bool isVolatile = N->isVolatile();
910 DebugLoc dl = N->getDebugLoc();
912 SDValue Val = GetPromotedInteger(N->getValue()); // Get promoted value.
914 // Truncate the value and store the result.
915 return DAG.getTruncStore(Ch, dl, Val, Ptr, N->getSrcValue(),
916 SVOffset, N->getMemoryVT(),
917 isVolatile, Alignment);
920 SDValue DAGTypeLegalizer::PromoteIntOp_TRUNCATE(SDNode *N) {
921 SDValue Op = GetPromotedInteger(N->getOperand(0));
922 return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), N->getValueType(0), Op);
925 SDValue DAGTypeLegalizer::PromoteIntOp_UINT_TO_FP(SDNode *N) {
926 return DAG.UpdateNodeOperands(SDValue(N, 0),
927 ZExtPromotedInteger(N->getOperand(0)));
930 SDValue DAGTypeLegalizer::PromoteIntOp_ZERO_EXTEND(SDNode *N) {
931 SDValue Op = GetPromotedInteger(N->getOperand(0));
932 Op = DAG.getNode(ISD::ANY_EXTEND, N->getDebugLoc(), N->getValueType(0), Op);
933 return DAG.getZeroExtendInReg(Op, N->getOperand(0).getValueType());
937 //===----------------------------------------------------------------------===//
938 // Integer Result Expansion
939 //===----------------------------------------------------------------------===//
941 /// ExpandIntegerResult - This method is called when the specified result of the
942 /// specified node is found to need expansion. At this point, the node may also
943 /// have invalid operands or may have other results that need promotion, we just
944 /// know that (at least) one result needs expansion.
945 void DAGTypeLegalizer::ExpandIntegerResult(SDNode *N, unsigned ResNo) {
946 DEBUG(cerr << "Expand integer result: "; N->dump(&DAG); cerr << "\n");
950 // See if the target wants to custom expand this node.
951 if (CustomLowerResults(N, N->getValueType(ResNo), true))
954 switch (N->getOpcode()) {
957 cerr << "ExpandIntegerResult #" << ResNo << ": ";
958 N->dump(&DAG); cerr << "\n";
960 assert(0 && "Do not know how to expand the result of this operator!");
963 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
964 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
965 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
966 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
968 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
969 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
970 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
971 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
972 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
974 case ISD::ANY_EXTEND: ExpandIntRes_ANY_EXTEND(N, Lo, Hi); break;
975 case ISD::AssertSext: ExpandIntRes_AssertSext(N, Lo, Hi); break;
976 case ISD::AssertZext: ExpandIntRes_AssertZext(N, Lo, Hi); break;
977 case ISD::BSWAP: ExpandIntRes_BSWAP(N, Lo, Hi); break;
978 case ISD::Constant: ExpandIntRes_Constant(N, Lo, Hi); break;
979 case ISD::CTLZ: ExpandIntRes_CTLZ(N, Lo, Hi); break;
980 case ISD::CTPOP: ExpandIntRes_CTPOP(N, Lo, Hi); break;
981 case ISD::CTTZ: ExpandIntRes_CTTZ(N, Lo, Hi); break;
982 case ISD::FP_TO_SINT: ExpandIntRes_FP_TO_SINT(N, Lo, Hi); break;
983 case ISD::FP_TO_UINT: ExpandIntRes_FP_TO_UINT(N, Lo, Hi); break;
984 case ISD::LOAD: ExpandIntRes_LOAD(cast<LoadSDNode>(N), Lo, Hi); break;
985 case ISD::MUL: ExpandIntRes_MUL(N, Lo, Hi); break;
986 case ISD::SDIV: ExpandIntRes_SDIV(N, Lo, Hi); break;
987 case ISD::SIGN_EXTEND: ExpandIntRes_SIGN_EXTEND(N, Lo, Hi); break;
988 case ISD::SIGN_EXTEND_INREG: ExpandIntRes_SIGN_EXTEND_INREG(N, Lo, Hi); break;
989 case ISD::SREM: ExpandIntRes_SREM(N, Lo, Hi); break;
990 case ISD::TRUNCATE: ExpandIntRes_TRUNCATE(N, Lo, Hi); break;
991 case ISD::UDIV: ExpandIntRes_UDIV(N, Lo, Hi); break;
992 case ISD::UREM: ExpandIntRes_UREM(N, Lo, Hi); break;
993 case ISD::ZERO_EXTEND: ExpandIntRes_ZERO_EXTEND(N, Lo, Hi); break;
997 case ISD::XOR: ExpandIntRes_Logical(N, Lo, Hi); break;
1000 case ISD::SUB: ExpandIntRes_ADDSUB(N, Lo, Hi); break;
1003 case ISD::SUBC: ExpandIntRes_ADDSUBC(N, Lo, Hi); break;
1006 case ISD::SUBE: ExpandIntRes_ADDSUBE(N, Lo, Hi); break;
1010 case ISD::SRL: ExpandIntRes_Shift(N, Lo, Hi); break;
1013 // If Lo/Hi is null, the sub-method took care of registering results etc.
1015 SetExpandedInteger(SDValue(N, ResNo), Lo, Hi);
1018 /// ExpandShiftByConstant - N is a shift by a value that needs to be expanded,
1019 /// and the shift amount is a constant 'Amt'. Expand the operation.
1020 void DAGTypeLegalizer::ExpandShiftByConstant(SDNode *N, unsigned Amt,
1021 SDValue &Lo, SDValue &Hi) {
1022 DebugLoc dl = N->getDebugLoc();
1023 // Expand the incoming operand to be shifted, so that we have its parts
1025 GetExpandedInteger(N->getOperand(0), InL, InH);
1027 MVT NVT = InL.getValueType();
1028 unsigned VTBits = N->getValueType(0).getSizeInBits();
1029 unsigned NVTBits = NVT.getSizeInBits();
1030 MVT ShTy = N->getOperand(1).getValueType();
1032 if (N->getOpcode() == ISD::SHL) {
1034 Lo = Hi = DAG.getConstant(0, NVT);
1035 } else if (Amt > NVTBits) {
1036 Lo = DAG.getConstant(0, NVT);
1037 Hi = DAG.getNode(ISD::SHL, dl,
1038 NVT, InL, DAG.getConstant(Amt-NVTBits,ShTy));
1039 } else if (Amt == NVTBits) {
1040 Lo = DAG.getConstant(0, NVT);
1042 } else if (Amt == 1 &&
1043 TLI.isOperationLegalOrCustom(ISD::ADDC,
1044 TLI.getTypeToExpandTo(NVT))) {
1045 // Emit this X << 1 as X+X.
1046 SDVTList VTList = DAG.getVTList(NVT, MVT::Flag);
1047 SDValue LoOps[2] = { InL, InL };
1048 Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps, 2);
1049 SDValue HiOps[3] = { InH, InH, Lo.getValue(1) };
1050 Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps, 3);
1052 Lo = DAG.getNode(ISD::SHL, dl, NVT, InL, DAG.getConstant(Amt, ShTy));
1053 Hi = DAG.getNode(ISD::OR, dl, NVT,
1054 DAG.getNode(ISD::SHL, dl, NVT, InH,
1055 DAG.getConstant(Amt, ShTy)),
1056 DAG.getNode(ISD::SRL, dl, NVT, InL,
1057 DAG.getConstant(NVTBits-Amt, ShTy)));
1062 if (N->getOpcode() == ISD::SRL) {
1064 Lo = DAG.getConstant(0, NVT);
1065 Hi = DAG.getConstant(0, NVT);
1066 } else if (Amt > NVTBits) {
1067 Lo = DAG.getNode(ISD::SRL, dl,
1068 NVT, InH, DAG.getConstant(Amt-NVTBits,ShTy));
1069 Hi = DAG.getConstant(0, NVT);
1070 } else if (Amt == NVTBits) {
1072 Hi = DAG.getConstant(0, NVT);
1074 Lo = DAG.getNode(ISD::OR, dl, NVT,
1075 DAG.getNode(ISD::SRL, dl, NVT, InL,
1076 DAG.getConstant(Amt, ShTy)),
1077 DAG.getNode(ISD::SHL, dl, NVT, InH,
1078 DAG.getConstant(NVTBits-Amt, ShTy)));
1079 Hi = DAG.getNode(ISD::SRL, dl, NVT, InH, DAG.getConstant(Amt, ShTy));
1084 assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
1086 Hi = Lo = DAG.getNode(ISD::SRA, dl, NVT, InH,
1087 DAG.getConstant(NVTBits-1, ShTy));
1088 } else if (Amt > NVTBits) {
1089 Lo = DAG.getNode(ISD::SRA, dl, NVT, InH,
1090 DAG.getConstant(Amt-NVTBits, ShTy));
1091 Hi = DAG.getNode(ISD::SRA, dl, NVT, InH,
1092 DAG.getConstant(NVTBits-1, ShTy));
1093 } else if (Amt == NVTBits) {
1095 Hi = DAG.getNode(ISD::SRA, dl, NVT, InH,
1096 DAG.getConstant(NVTBits-1, ShTy));
1098 Lo = DAG.getNode(ISD::OR, NVT,
1099 DAG.getNode(ISD::SRL, dl, NVT, InL,
1100 DAG.getConstant(Amt, ShTy)),
1101 DAG.getNode(ISD::SHL, dl, NVT, InH,
1102 DAG.getConstant(NVTBits-Amt, ShTy)));
1103 Hi = DAG.getNode(ISD::SRA, dl, NVT, InH, DAG.getConstant(Amt, ShTy));
1107 /// ExpandShiftWithKnownAmountBit - Try to determine whether we can simplify
1108 /// this shift based on knowledge of the high bit of the shift amount. If we
1109 /// can tell this, we know that it is >= 32 or < 32, without knowing the actual
1111 bool DAGTypeLegalizer::
1112 ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi) {
1113 SDValue Amt = N->getOperand(1);
1114 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
1115 MVT ShTy = Amt.getValueType();
1116 unsigned ShBits = ShTy.getSizeInBits();
1117 unsigned NVTBits = NVT.getSizeInBits();
1118 assert(isPowerOf2_32(NVTBits) &&
1119 "Expanded integer type size not a power of two!");
1120 DebugLoc dl = N->getDebugLoc();
1122 APInt HighBitMask = APInt::getHighBitsSet(ShBits, ShBits - Log2_32(NVTBits));
1123 APInt KnownZero, KnownOne;
1124 DAG.ComputeMaskedBits(N->getOperand(1), HighBitMask, KnownZero, KnownOne);
1126 // If we don't know anything about the high bits, exit.
1127 if (((KnownZero|KnownOne) & HighBitMask) == 0)
1130 // Get the incoming operand to be shifted.
1132 GetExpandedInteger(N->getOperand(0), InL, InH);
1134 // If we know that any of the high bits of the shift amount are one, then we
1135 // can do this as a couple of simple shifts.
1136 if (KnownOne.intersects(HighBitMask)) {
1137 // Mask out the high bit, which we know is set.
1138 Amt = DAG.getNode(ISD::AND, dl, ShTy, Amt,
1139 DAG.getConstant(~HighBitMask, ShTy));
1141 switch (N->getOpcode()) {
1142 default: assert(0 && "Unknown shift");
1144 Lo = DAG.getConstant(0, NVT); // Low part is zero.
1145 Hi = DAG.getNode(ISD::SHL, dl, NVT, InL, Amt); // High part from Lo part.
1148 Hi = DAG.getConstant(0, NVT); // Hi part is zero.
1149 Lo = DAG.getNode(ISD::SRL, dl, NVT, InH, Amt); // Lo part from Hi part.
1152 Hi = DAG.getNode(ISD::SRA, dl, NVT, InH, // Sign extend high part.
1153 DAG.getConstant(NVTBits-1, ShTy));
1154 Lo = DAG.getNode(ISD::SRA, dl, NVT, InH, Amt); // Lo part from Hi part.
1160 // FIXME: This code is broken for shifts with a zero amount!
1161 // If we know that all of the high bits of the shift amount are zero, then we
1162 // can do this as a couple of simple shifts.
1163 if ((KnownZero & HighBitMask) == HighBitMask) {
1165 SDValue Amt2 = DAG.getNode(ISD::SUB, ShTy,
1166 DAG.getConstant(NVTBits, ShTy),
1169 switch (N->getOpcode()) {
1170 default: assert(0 && "Unknown shift");
1171 case ISD::SHL: Op1 = ISD::SHL; Op2 = ISD::SRL; break;
1173 case ISD::SRA: Op1 = ISD::SRL; Op2 = ISD::SHL; break;
1176 Lo = DAG.getNode(N->getOpcode(), NVT, InL, Amt);
1177 Hi = DAG.getNode(ISD::OR, NVT,
1178 DAG.getNode(Op1, NVT, InH, Amt),
1179 DAG.getNode(Op2, NVT, InL, Amt2));
1187 void DAGTypeLegalizer::ExpandIntRes_ADDSUB(SDNode *N,
1188 SDValue &Lo, SDValue &Hi) {
1189 DebugLoc dl = N->getDebugLoc();
1190 // Expand the subcomponents.
1191 SDValue LHSL, LHSH, RHSL, RHSH;
1192 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
1193 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
1195 MVT NVT = LHSL.getValueType();
1196 SDValue LoOps[2] = { LHSL, RHSL };
1197 SDValue HiOps[3] = { LHSH, RHSH };
1199 // Do not generate ADDC/ADDE or SUBC/SUBE if the target does not support
1200 // them. TODO: Teach operation legalization how to expand unsupported
1201 // ADDC/ADDE/SUBC/SUBE. The problem is that these operations generate
1202 // a carry of type MVT::Flag, but there doesn't seem to be any way to
1203 // generate a value of this type in the expanded code sequence.
1205 TLI.isOperationLegalOrCustom(N->getOpcode() == ISD::ADD ?
1206 ISD::ADDC : ISD::SUBC,
1207 TLI.getTypeToExpandTo(NVT));
1210 SDVTList VTList = DAG.getVTList(NVT, MVT::Flag);
1211 if (N->getOpcode() == ISD::ADD) {
1212 Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps, 2);
1213 HiOps[2] = Lo.getValue(1);
1214 Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps, 3);
1216 Lo = DAG.getNode(ISD::SUBC, dl, VTList, LoOps, 2);
1217 HiOps[2] = Lo.getValue(1);
1218 Hi = DAG.getNode(ISD::SUBE, dl, VTList, HiOps, 3);
1221 if (N->getOpcode() == ISD::ADD) {
1222 Lo = DAG.getNode(ISD::ADD, dl, NVT, LoOps, 2);
1223 Hi = DAG.getNode(ISD::ADD, dl, NVT, HiOps, 2);
1224 SDValue Cmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Lo, LoOps[0],
1226 SDValue Carry1 = DAG.getNode(ISD::SELECT, dl, NVT, Cmp1,
1227 DAG.getConstant(1, NVT),
1228 DAG.getConstant(0, NVT));
1229 SDValue Cmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Lo, LoOps[1],
1231 SDValue Carry2 = DAG.getNode(ISD::SELECT, dl, NVT, Cmp2,
1232 DAG.getConstant(1, NVT), Carry1);
1233 Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, Carry2);
1235 Lo = DAG.getNode(ISD::SUB, dl, NVT, LoOps, 2);
1236 Hi = DAG.getNode(ISD::SUB, dl, NVT, HiOps, 2);
1238 DAG.getSetCC(TLI.getSetCCResultType(LoOps[0].getValueType()),
1239 LoOps[0], LoOps[1], ISD::SETULT);
1240 SDValue Borrow = DAG.getNode(ISD::SELECT, dl, NVT, Cmp,
1241 DAG.getConstant(1, NVT),
1242 DAG.getConstant(0, NVT));
1243 Hi = DAG.getNode(ISD::SUB, dl, NVT, Hi, Borrow);
1248 void DAGTypeLegalizer::ExpandIntRes_ADDSUBC(SDNode *N,
1249 SDValue &Lo, SDValue &Hi) {
1250 // Expand the subcomponents.
1251 SDValue LHSL, LHSH, RHSL, RHSH;
1252 DebugLoc dl = N->getDebugLoc();
1253 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
1254 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
1255 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
1256 SDValue LoOps[2] = { LHSL, RHSL };
1257 SDValue HiOps[3] = { LHSH, RHSH };
1259 if (N->getOpcode() == ISD::ADDC) {
1260 Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps, 2);
1261 HiOps[2] = Lo.getValue(1);
1262 Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps, 3);
1264 Lo = DAG.getNode(ISD::SUBC, dl, VTList, LoOps, 2);
1265 HiOps[2] = Lo.getValue(1);
1266 Hi = DAG.getNode(ISD::SUBE, dl, VTList, HiOps, 3);
1269 // Legalized the flag result - switch anything that used the old flag to
1271 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
1274 void DAGTypeLegalizer::ExpandIntRes_ADDSUBE(SDNode *N,
1275 SDValue &Lo, SDValue &Hi) {
1276 // Expand the subcomponents.
1277 SDValue LHSL, LHSH, RHSL, RHSH;
1278 DebugLoc dl = N->getDebugLoc();
1279 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
1280 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
1281 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
1282 SDValue LoOps[3] = { LHSL, RHSL, N->getOperand(2) };
1283 SDValue HiOps[3] = { LHSH, RHSH };
1285 Lo = DAG.getNode(N->getOpcode(), dl, VTList, LoOps, 3);
1286 HiOps[2] = Lo.getValue(1);
1287 Hi = DAG.getNode(N->getOpcode(), dl, VTList, HiOps, 3);
1289 // Legalized the flag result - switch anything that used the old flag to
1291 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
1294 void DAGTypeLegalizer::ExpandIntRes_ANY_EXTEND(SDNode *N,
1295 SDValue &Lo, SDValue &Hi) {
1296 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
1297 DebugLoc dl = N->getDebugLoc();
1298 SDValue Op = N->getOperand(0);
1299 if (Op.getValueType().bitsLE(NVT)) {
1300 // The low part is any extension of the input (which degenerates to a copy).
1301 Lo = DAG.getNode(ISD::ANY_EXTEND, dl, NVT, Op);
1302 Hi = DAG.getNode(ISD::UNDEF, dl, NVT); // The high part is undefined.
1304 // For example, extension of an i48 to an i64. The operand type necessarily
1305 // promotes to the result type, so will end up being expanded too.
1306 assert(getTypeAction(Op.getValueType()) == PromoteInteger &&
1307 "Only know how to promote this result!");
1308 SDValue Res = GetPromotedInteger(Op);
1309 assert(Res.getValueType() == N->getValueType(0) &&
1310 "Operand over promoted?");
1311 // Split the promoted operand. This will simplify when it is expanded.
1312 SplitInteger(Res, Lo, Hi);
1316 void DAGTypeLegalizer::ExpandIntRes_AssertSext(SDNode *N,
1317 SDValue &Lo, SDValue &Hi) {
1318 DebugLoc dl = N->getDebugLoc();
1319 GetExpandedInteger(N->getOperand(0), Lo, Hi);
1320 MVT NVT = Lo.getValueType();
1321 MVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
1322 unsigned NVTBits = NVT.getSizeInBits();
1323 unsigned EVTBits = EVT.getSizeInBits();
1325 if (NVTBits < EVTBits) {
1326 Hi = DAG.getNode(ISD::AssertSext, dl, NVT, Hi,
1327 DAG.getValueType(MVT::getIntegerVT(EVTBits - NVTBits)));
1329 Lo = DAG.getNode(ISD::AssertSext, dl, NVT, Lo, DAG.getValueType(EVT));
1330 // The high part replicates the sign bit of Lo, make it explicit.
1331 Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
1332 DAG.getConstant(NVTBits-1, TLI.getShiftAmountTy()));
1336 void DAGTypeLegalizer::ExpandIntRes_AssertZext(SDNode *N,
1337 SDValue &Lo, SDValue &Hi) {
1338 DebugLoc dl = N->getDebugLoc();
1339 GetExpandedInteger(N->getOperand(0), Lo, Hi);
1340 MVT NVT = Lo.getValueType();
1341 MVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
1342 unsigned NVTBits = NVT.getSizeInBits();
1343 unsigned EVTBits = EVT.getSizeInBits();
1345 if (NVTBits < EVTBits) {
1346 Hi = DAG.getNode(ISD::AssertZext, dl, NVT, Hi,
1347 DAG.getValueType(MVT::getIntegerVT(EVTBits - NVTBits)));
1349 Lo = DAG.getNode(ISD::AssertZext, dl, NVT, Lo, DAG.getValueType(EVT));
1350 // The high part must be zero, make it explicit.
1351 Hi = DAG.getConstant(0, NVT);
1355 void DAGTypeLegalizer::ExpandIntRes_BSWAP(SDNode *N,
1356 SDValue &Lo, SDValue &Hi) {
1357 DebugLoc dl = N->getDebugLoc();
1358 GetExpandedInteger(N->getOperand(0), Hi, Lo); // Note swapped operands.
1359 Lo = DAG.getNode(ISD::BSWAP, dl, Lo.getValueType(), Lo);
1360 Hi = DAG.getNode(ISD::BSWAP, dl, Hi.getValueType(), Hi);
1363 void DAGTypeLegalizer::ExpandIntRes_Constant(SDNode *N,
1364 SDValue &Lo, SDValue &Hi) {
1365 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
1366 unsigned NBitWidth = NVT.getSizeInBits();
1367 const APInt &Cst = cast<ConstantSDNode>(N)->getAPIntValue();
1368 Lo = DAG.getConstant(APInt(Cst).trunc(NBitWidth), NVT);
1369 Hi = DAG.getConstant(Cst.lshr(NBitWidth).trunc(NBitWidth), NVT);
1372 void DAGTypeLegalizer::ExpandIntRes_CTLZ(SDNode *N,
1373 SDValue &Lo, SDValue &Hi) {
1374 DebugLoc dl = N->getDebugLoc();
1375 // ctlz (HiLo) -> Hi != 0 ? ctlz(Hi) : (ctlz(Lo)+32)
1376 GetExpandedInteger(N->getOperand(0), Lo, Hi);
1377 MVT NVT = Lo.getValueType();
1379 SDValue HiNotZero = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Hi,
1380 DAG.getConstant(0, NVT), ISD::SETNE);
1382 SDValue LoLZ = DAG.getNode(ISD::CTLZ, dl, NVT, Lo);
1383 SDValue HiLZ = DAG.getNode(ISD::CTLZ, dl, NVT, Hi);
1385 Lo = DAG.getNode(ISD::SELECT, dl, NVT, HiNotZero, HiLZ,
1386 DAG.getNode(ISD::ADD, dl, NVT, LoLZ,
1387 DAG.getConstant(NVT.getSizeInBits(), NVT)));
1388 Hi = DAG.getConstant(0, NVT);
1391 void DAGTypeLegalizer::ExpandIntRes_CTPOP(SDNode *N,
1392 SDValue &Lo, SDValue &Hi) {
1393 DebugLoc dl = N->getDebugLoc();
1394 // ctpop(HiLo) -> ctpop(Hi)+ctpop(Lo)
1395 GetExpandedInteger(N->getOperand(0), Lo, Hi);
1396 MVT NVT = Lo.getValueType();
1397 Lo = DAG.getNode(ISD::ADD, dl, NVT, DAG.getNode(ISD::CTPOP, NVT, Lo),
1398 DAG.getNode(ISD::CTPOP, dl, NVT, Hi));
1399 Hi = DAG.getConstant(0, NVT);
1402 void DAGTypeLegalizer::ExpandIntRes_CTTZ(SDNode *N,
1403 SDValue &Lo, SDValue &Hi) {
1404 DebugLoc dl = N->getDebugLoc();
1405 // cttz (HiLo) -> Lo != 0 ? cttz(Lo) : (cttz(Hi)+32)
1406 GetExpandedInteger(N->getOperand(0), Lo, Hi);
1407 MVT NVT = Lo.getValueType();
1409 SDValue LoNotZero = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Lo,
1410 DAG.getConstant(0, NVT), ISD::SETNE);
1412 SDValue LoLZ = DAG.getNode(ISD::CTTZ, dl, NVT, Lo);
1413 SDValue HiLZ = DAG.getNode(ISD::CTTZ, dl, NVT, Hi);
1415 Lo = DAG.getNode(ISD::SELECT, dl, NVT, LoNotZero, LoLZ,
1416 DAG.getNode(ISD::ADD, dl, NVT, HiLZ,
1417 DAG.getConstant(NVT.getSizeInBits(), NVT)));
1418 Hi = DAG.getConstant(0, NVT);
1421 void DAGTypeLegalizer::ExpandIntRes_FP_TO_SINT(SDNode *N, SDValue &Lo,
1423 DebugLoc dl = N->getDebugLoc();
1424 MVT VT = N->getValueType(0);
1425 SDValue Op = N->getOperand(0);
1426 RTLIB::Libcall LC = RTLIB::getFPTOSINT(Op.getValueType(), VT);
1427 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected fp-to-sint conversion!");
1428 SplitInteger(MakeLibCall(LC, VT, &Op, 1, true/*irrelevant*/, dl), Lo, Hi);
1431 void DAGTypeLegalizer::ExpandIntRes_FP_TO_UINT(SDNode *N, SDValue &Lo,
1433 DebugLoc dl = N->getDebugLoc();
1434 MVT VT = N->getValueType(0);
1435 SDValue Op = N->getOperand(0);
1436 RTLIB::Libcall LC = RTLIB::getFPTOUINT(Op.getValueType(), VT);
1437 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected fp-to-uint conversion!");
1438 SplitInteger(MakeLibCall(LC, VT, &Op, 1, false/*irrelevant*/, dl), Lo, Hi);
1441 void DAGTypeLegalizer::ExpandIntRes_LOAD(LoadSDNode *N,
1442 SDValue &Lo, SDValue &Hi) {
1443 if (ISD::isNormalLoad(N)) {
1444 ExpandRes_NormalLoad(N, Lo, Hi);
1448 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1450 MVT VT = N->getValueType(0);
1451 MVT NVT = TLI.getTypeToTransformTo(VT);
1452 SDValue Ch = N->getChain();
1453 SDValue Ptr = N->getBasePtr();
1454 ISD::LoadExtType ExtType = N->getExtensionType();
1455 int SVOffset = N->getSrcValueOffset();
1456 unsigned Alignment = N->getAlignment();
1457 bool isVolatile = N->isVolatile();
1458 DebugLoc dl = N->getDebugLoc();
1460 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1462 if (N->getMemoryVT().bitsLE(NVT)) {
1463 MVT EVT = N->getMemoryVT();
1465 Lo = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getSrcValue(), SVOffset,
1466 EVT, isVolatile, Alignment);
1468 // Remember the chain.
1469 Ch = Lo.getValue(1);
1471 if (ExtType == ISD::SEXTLOAD) {
1472 // The high part is obtained by SRA'ing all but one of the bits of the
1474 unsigned LoSize = Lo.getValueType().getSizeInBits();
1475 Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
1476 DAG.getConstant(LoSize-1, TLI.getShiftAmountTy()));
1477 } else if (ExtType == ISD::ZEXTLOAD) {
1478 // The high part is just a zero.
1479 Hi = DAG.getConstant(0, NVT);
1481 assert(ExtType == ISD::EXTLOAD && "Unknown extload!");
1482 // The high part is undefined.
1483 Hi = DAG.getNode(ISD::UNDEF, dl, NVT);
1485 } else if (TLI.isLittleEndian()) {
1486 // Little-endian - low bits are at low addresses.
1487 Lo = DAG.getLoad(NVT, dl, Ch, Ptr, N->getSrcValue(), SVOffset,
1488 isVolatile, Alignment);
1490 unsigned ExcessBits =
1491 N->getMemoryVT().getSizeInBits() - NVT.getSizeInBits();
1492 MVT NEVT = MVT::getIntegerVT(ExcessBits);
1494 // Increment the pointer to the other half.
1495 unsigned IncrementSize = NVT.getSizeInBits()/8;
1496 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
1497 DAG.getIntPtrConstant(IncrementSize));
1498 Hi = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getSrcValue(),
1499 SVOffset+IncrementSize, NEVT,
1500 isVolatile, MinAlign(Alignment, IncrementSize));
1502 // Build a factor node to remember that this load is independent of the
1504 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
1507 // Big-endian - high bits are at low addresses. Favor aligned loads at
1508 // the cost of some bit-fiddling.
1509 MVT EVT = N->getMemoryVT();
1510 unsigned EBytes = EVT.getStoreSizeInBits()/8;
1511 unsigned IncrementSize = NVT.getSizeInBits()/8;
1512 unsigned ExcessBits = (EBytes - IncrementSize)*8;
1514 // Load both the high bits and maybe some of the low bits.
1515 Hi = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getSrcValue(), SVOffset,
1516 MVT::getIntegerVT(EVT.getSizeInBits() - ExcessBits),
1517 isVolatile, Alignment);
1519 // Increment the pointer to the other half.
1520 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
1521 DAG.getIntPtrConstant(IncrementSize));
1522 // Load the rest of the low bits.
1523 Lo = DAG.getExtLoad(ISD::ZEXTLOAD, dl, NVT, Ch, Ptr, N->getSrcValue(),
1524 SVOffset+IncrementSize,
1525 MVT::getIntegerVT(ExcessBits),
1526 isVolatile, MinAlign(Alignment, IncrementSize));
1528 // Build a factor node to remember that this load is independent of the
1530 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
1533 if (ExcessBits < NVT.getSizeInBits()) {
1534 // Transfer low bits from the bottom of Hi to the top of Lo.
1535 Lo = DAG.getNode(ISD::OR, dl, NVT, Lo,
1536 DAG.getNode(ISD::SHL, dl, NVT, Hi,
1537 DAG.getConstant(ExcessBits,
1538 TLI.getShiftAmountTy())));
1539 // Move high bits to the right position in Hi.
1540 Hi = DAG.getNode(ExtType == ISD::SEXTLOAD ? ISD::SRA : ISD::SRL, dl,
1542 DAG.getConstant(NVT.getSizeInBits() - ExcessBits,
1543 TLI.getShiftAmountTy()));
1547 // Legalized the chain result - switch anything that used the old chain to
1549 ReplaceValueWith(SDValue(N, 1), Ch);
1552 void DAGTypeLegalizer::ExpandIntRes_Logical(SDNode *N,
1553 SDValue &Lo, SDValue &Hi) {
1554 DebugLoc dl = N->getDebugLoc();
1555 SDValue LL, LH, RL, RH;
1556 GetExpandedInteger(N->getOperand(0), LL, LH);
1557 GetExpandedInteger(N->getOperand(1), RL, RH);
1558 Lo = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LL, RL);
1559 Hi = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LH, RH);
1562 void DAGTypeLegalizer::ExpandIntRes_MUL(SDNode *N,
1563 SDValue &Lo, SDValue &Hi) {
1564 MVT VT = N->getValueType(0);
1565 MVT NVT = TLI.getTypeToTransformTo(VT);
1566 DebugLoc dl = N->getDebugLoc();
1568 bool HasMULHS = TLI.isOperationLegalOrCustom(ISD::MULHS, NVT);
1569 bool HasMULHU = TLI.isOperationLegalOrCustom(ISD::MULHU, NVT);
1570 bool HasSMUL_LOHI = TLI.isOperationLegalOrCustom(ISD::SMUL_LOHI, NVT);
1571 bool HasUMUL_LOHI = TLI.isOperationLegalOrCustom(ISD::UMUL_LOHI, NVT);
1572 if (HasMULHU || HasMULHS || HasUMUL_LOHI || HasSMUL_LOHI) {
1573 SDValue LL, LH, RL, RH;
1574 GetExpandedInteger(N->getOperand(0), LL, LH);
1575 GetExpandedInteger(N->getOperand(1), RL, RH);
1576 unsigned OuterBitSize = VT.getSizeInBits();
1577 unsigned InnerBitSize = NVT.getSizeInBits();
1578 unsigned LHSSB = DAG.ComputeNumSignBits(N->getOperand(0));
1579 unsigned RHSSB = DAG.ComputeNumSignBits(N->getOperand(1));
1581 APInt HighMask = APInt::getHighBitsSet(OuterBitSize, InnerBitSize);
1582 if (DAG.MaskedValueIsZero(N->getOperand(0), HighMask) &&
1583 DAG.MaskedValueIsZero(N->getOperand(1), HighMask)) {
1584 // The inputs are both zero-extended.
1586 // We can emit a umul_lohi.
1587 Lo = DAG.getNode(ISD::UMUL_LOHI, dl, DAG.getVTList(NVT, NVT), LL, RL);
1588 Hi = SDValue(Lo.getNode(), 1);
1592 // We can emit a mulhu+mul.
1593 Lo = DAG.getNode(ISD::MUL, dl, NVT, LL, RL);
1594 Hi = DAG.getNode(ISD::MULHU, dl, NVT, LL, RL);
1598 if (LHSSB > InnerBitSize && RHSSB > InnerBitSize) {
1599 // The input values are both sign-extended.
1601 // We can emit a smul_lohi.
1602 Lo = DAG.getNode(ISD::SMUL_LOHI, dl, DAG.getVTList(NVT, NVT), LL, RL);
1603 Hi = SDValue(Lo.getNode(), 1);
1607 // We can emit a mulhs+mul.
1608 Lo = DAG.getNode(ISD::MUL, dl, NVT, LL, RL);
1609 Hi = DAG.getNode(ISD::MULHS, dl, NVT, LL, RL);
1614 // Lo,Hi = umul LHS, RHS.
1615 SDValue UMulLOHI = DAG.getNode(ISD::UMUL_LOHI, dl,
1616 DAG.getVTList(NVT, NVT), LL, RL);
1618 Hi = UMulLOHI.getValue(1);
1619 RH = DAG.getNode(ISD::MUL, dl, NVT, LL, RH);
1620 LH = DAG.getNode(ISD::MUL, dl, NVT, LH, RL);
1621 Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, RH);
1622 Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, LH);
1626 Lo = DAG.getNode(ISD::MUL, dl, NVT, LL, RL);
1627 Hi = DAG.getNode(ISD::MULHU, dl, NVT, LL, RL);
1628 RH = DAG.getNode(ISD::MUL, dl, NVT, LL, RH);
1629 LH = DAG.getNode(ISD::MUL, dl, NVT, LH, RL);
1630 Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, RH);
1631 Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, LH);
1636 // If nothing else, we can make a libcall.
1637 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1639 LC = RTLIB::MUL_I16;
1640 else if (VT == MVT::i32)
1641 LC = RTLIB::MUL_I32;
1642 else if (VT == MVT::i64)
1643 LC = RTLIB::MUL_I64;
1644 else if (VT == MVT::i128)
1645 LC = RTLIB::MUL_I128;
1646 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported MUL!");
1648 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1649 SplitInteger(MakeLibCall(LC, VT, Ops, 2, true/*irrelevant*/, dl), Lo, Hi);
1652 void DAGTypeLegalizer::ExpandIntRes_SDIV(SDNode *N,
1653 SDValue &Lo, SDValue &Hi) {
1654 MVT VT = N->getValueType(0);
1655 DebugLoc dl = N->getDebugLoc();
1657 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1659 LC = RTLIB::SDIV_I32;
1660 else if (VT == MVT::i64)
1661 LC = RTLIB::SDIV_I64;
1662 else if (VT == MVT::i128)
1663 LC = RTLIB::SDIV_I128;
1664 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SDIV!");
1666 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1667 SplitInteger(MakeLibCall(LC, VT, Ops, 2, true, dl), Lo, Hi);
1670 void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
1671 SDValue &Lo, SDValue &Hi) {
1672 MVT VT = N->getValueType(0);
1673 DebugLoc dl = N->getDebugLoc();
1675 // If we can emit an efficient shift operation, do so now. Check to see if
1676 // the RHS is a constant.
1677 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N->getOperand(1)))
1678 return ExpandShiftByConstant(N, CN->getZExtValue(), Lo, Hi);
1680 // If we can determine that the high bit of the shift is zero or one, even if
1681 // the low bits are variable, emit this shift in an optimized form.
1682 if (ExpandShiftWithKnownAmountBit(N, Lo, Hi))
1685 // If this target supports shift_PARTS, use it. First, map to the _PARTS opc.
1687 if (N->getOpcode() == ISD::SHL) {
1688 PartsOpc = ISD::SHL_PARTS;
1689 } else if (N->getOpcode() == ISD::SRL) {
1690 PartsOpc = ISD::SRL_PARTS;
1692 assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
1693 PartsOpc = ISD::SRA_PARTS;
1696 // Next check to see if the target supports this SHL_PARTS operation or if it
1697 // will custom expand it.
1698 MVT NVT = TLI.getTypeToTransformTo(VT);
1699 TargetLowering::LegalizeAction Action = TLI.getOperationAction(PartsOpc, NVT);
1700 if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
1701 Action == TargetLowering::Custom) {
1702 // Expand the subcomponents.
1704 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
1706 SDValue Ops[] = { LHSL, LHSH, N->getOperand(1) };
1707 MVT VT = LHSL.getValueType();
1708 Lo = DAG.getNode(PartsOpc, dl, DAG.getNodeValueTypes(VT, VT), 2, Ops, 3);
1709 Hi = Lo.getValue(1);
1713 // Otherwise, emit a libcall.
1714 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1716 if (N->getOpcode() == ISD::SHL) {
1717 isSigned = false; /*sign irrelevant*/
1719 LC = RTLIB::SHL_I16;
1720 else if (VT == MVT::i32)
1721 LC = RTLIB::SHL_I32;
1722 else if (VT == MVT::i64)
1723 LC = RTLIB::SHL_I64;
1724 else if (VT == MVT::i128)
1725 LC = RTLIB::SHL_I128;
1726 } else if (N->getOpcode() == ISD::SRL) {
1729 LC = RTLIB::SRL_I16;
1730 else if (VT == MVT::i32)
1731 LC = RTLIB::SRL_I32;
1732 else if (VT == MVT::i64)
1733 LC = RTLIB::SRL_I64;
1734 else if (VT == MVT::i128)
1735 LC = RTLIB::SRL_I128;
1737 assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
1740 LC = RTLIB::SRA_I16;
1741 else if (VT == MVT::i32)
1742 LC = RTLIB::SRA_I32;
1743 else if (VT == MVT::i64)
1744 LC = RTLIB::SRA_I64;
1745 else if (VT == MVT::i128)
1746 LC = RTLIB::SRA_I128;
1748 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported shift!");
1750 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1751 SplitInteger(MakeLibCall(LC, VT, Ops, 2, isSigned, dl), Lo, Hi);
1754 void DAGTypeLegalizer::ExpandIntRes_SIGN_EXTEND(SDNode *N,
1755 SDValue &Lo, SDValue &Hi) {
1756 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
1757 DebugLoc dl = N->getDebugLoc();
1758 SDValue Op = N->getOperand(0);
1759 if (Op.getValueType().bitsLE(NVT)) {
1760 // The low part is sign extension of the input (degenerates to a copy).
1761 Lo = DAG.getNode(ISD::SIGN_EXTEND, dl, NVT, N->getOperand(0));
1762 // The high part is obtained by SRA'ing all but one of the bits of low part.
1763 unsigned LoSize = NVT.getSizeInBits();
1764 Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
1765 DAG.getConstant(LoSize-1, TLI.getShiftAmountTy()));
1767 // For example, extension of an i48 to an i64. The operand type necessarily
1768 // promotes to the result type, so will end up being expanded too.
1769 assert(getTypeAction(Op.getValueType()) == PromoteInteger &&
1770 "Only know how to promote this result!");
1771 SDValue Res = GetPromotedInteger(Op);
1772 assert(Res.getValueType() == N->getValueType(0) &&
1773 "Operand over promoted?");
1774 // Split the promoted operand. This will simplify when it is expanded.
1775 SplitInteger(Res, Lo, Hi);
1776 unsigned ExcessBits =
1777 Op.getValueType().getSizeInBits() - NVT.getSizeInBits();
1778 Hi = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Hi.getValueType(), Hi,
1779 DAG.getValueType(MVT::getIntegerVT(ExcessBits)));
1783 void DAGTypeLegalizer::
1784 ExpandIntRes_SIGN_EXTEND_INREG(SDNode *N, SDValue &Lo, SDValue &Hi) {
1785 DebugLoc dl = N->getDebugLoc();
1786 GetExpandedInteger(N->getOperand(0), Lo, Hi);
1787 MVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
1789 if (EVT.bitsLE(Lo.getValueType())) {
1790 // sext_inreg the low part if needed.
1791 Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Lo.getValueType(), Lo,
1794 // The high part gets the sign extension from the lo-part. This handles
1795 // things like sextinreg V:i64 from i8.
1796 Hi = DAG.getNode(ISD::SRA, dl, Hi.getValueType(), Lo,
1797 DAG.getConstant(Hi.getValueType().getSizeInBits()-1,
1798 TLI.getShiftAmountTy()));
1800 // For example, extension of an i48 to an i64. Leave the low part alone,
1801 // sext_inreg the high part.
1802 unsigned ExcessBits =
1803 EVT.getSizeInBits() - Lo.getValueType().getSizeInBits();
1804 Hi = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Hi.getValueType(), Hi,
1805 DAG.getValueType(MVT::getIntegerVT(ExcessBits)));
1809 void DAGTypeLegalizer::ExpandIntRes_SREM(SDNode *N,
1810 SDValue &Lo, SDValue &Hi) {
1811 MVT VT = N->getValueType(0);
1812 DebugLoc dl = N->getDebugLoc();
1814 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1816 LC = RTLIB::SREM_I32;
1817 else if (VT == MVT::i64)
1818 LC = RTLIB::SREM_I64;
1819 else if (VT == MVT::i128)
1820 LC = RTLIB::SREM_I128;
1821 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SREM!");
1823 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1824 SplitInteger(MakeLibCall(LC, VT, Ops, 2, true, dl), Lo, Hi);
1827 void DAGTypeLegalizer::ExpandIntRes_TRUNCATE(SDNode *N,
1828 SDValue &Lo, SDValue &Hi) {
1829 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
1830 DebugLoc dl = N->getDebugLoc();
1831 Lo = DAG.getNode(ISD::TRUNCATE, dl, NVT, N->getOperand(0));
1832 Hi = DAG.getNode(ISD::SRL, dl,
1833 N->getOperand(0).getValueType(), N->getOperand(0),
1834 DAG.getConstant(NVT.getSizeInBits(),
1835 TLI.getShiftAmountTy()));
1836 Hi = DAG.getNode(ISD::TRUNCATE, dl, NVT, Hi);
1839 void DAGTypeLegalizer::ExpandIntRes_UDIV(SDNode *N,
1840 SDValue &Lo, SDValue &Hi) {
1841 MVT VT = N->getValueType(0);
1842 DebugLoc dl = N->getDebugLoc();
1844 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1846 LC = RTLIB::UDIV_I32;
1847 else if (VT == MVT::i64)
1848 LC = RTLIB::UDIV_I64;
1849 else if (VT == MVT::i128)
1850 LC = RTLIB::UDIV_I128;
1851 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UDIV!");
1853 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1854 SplitInteger(MakeLibCall(LC, VT, Ops, 2, false, dl), Lo, Hi);
1857 void DAGTypeLegalizer::ExpandIntRes_UREM(SDNode *N,
1858 SDValue &Lo, SDValue &Hi) {
1859 MVT VT = N->getValueType(0);
1860 DebugLoc dl = N->getDebugLoc();
1862 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1864 LC = RTLIB::UREM_I32;
1865 else if (VT == MVT::i64)
1866 LC = RTLIB::UREM_I64;
1867 else if (VT == MVT::i128)
1868 LC = RTLIB::UREM_I128;
1869 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UREM!");
1871 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1872 SplitInteger(MakeLibCall(LC, VT, Ops, 2, false, dl), Lo, Hi);
1875 void DAGTypeLegalizer::ExpandIntRes_ZERO_EXTEND(SDNode *N,
1876 SDValue &Lo, SDValue &Hi) {
1877 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
1878 DebugLoc dl = N->getDebugLoc();
1879 SDValue Op = N->getOperand(0);
1880 if (Op.getValueType().bitsLE(NVT)) {
1881 // The low part is zero extension of the input (degenerates to a copy).
1882 Lo = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, N->getOperand(0));
1883 Hi = DAG.getConstant(0, NVT); // The high part is just a zero.
1885 // For example, extension of an i48 to an i64. The operand type necessarily
1886 // promotes to the result type, so will end up being expanded too.
1887 assert(getTypeAction(Op.getValueType()) == PromoteInteger &&
1888 "Only know how to promote this result!");
1889 SDValue Res = GetPromotedInteger(Op);
1890 assert(Res.getValueType() == N->getValueType(0) &&
1891 "Operand over promoted?");
1892 // Split the promoted operand. This will simplify when it is expanded.
1893 SplitInteger(Res, Lo, Hi);
1894 unsigned ExcessBits =
1895 Op.getValueType().getSizeInBits() - NVT.getSizeInBits();
1896 Hi = DAG.getZeroExtendInReg(Hi, MVT::getIntegerVT(ExcessBits));
1901 //===----------------------------------------------------------------------===//
1902 // Integer Operand Expansion
1903 //===----------------------------------------------------------------------===//
1905 /// ExpandIntegerOperand - This method is called when the specified operand of
1906 /// the specified node is found to need expansion. At this point, all of the
1907 /// result types of the node are known to be legal, but other operands of the
1908 /// node may need promotion or expansion as well as the specified one.
1909 bool DAGTypeLegalizer::ExpandIntegerOperand(SDNode *N, unsigned OpNo) {
1910 DEBUG(cerr << "Expand integer operand: "; N->dump(&DAG); cerr << "\n");
1911 SDValue Res = SDValue();
1913 if (CustomLowerResults(N, N->getOperand(OpNo).getValueType(), false))
1916 switch (N->getOpcode()) {
1919 cerr << "ExpandIntegerOperand Op #" << OpNo << ": ";
1920 N->dump(&DAG); cerr << "\n";
1922 assert(0 && "Do not know how to expand this operator's operand!");
1925 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1926 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1927 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1928 case ISD::INSERT_VECTOR_ELT: Res = ExpandOp_INSERT_VECTOR_ELT(N); break;
1929 case ISD::SCALAR_TO_VECTOR: Res = ExpandOp_SCALAR_TO_VECTOR(N); break;
1931 case ISD::BR_CC: Res = ExpandIntOp_BR_CC(N); break;
1932 case ISD::SELECT_CC: Res = ExpandIntOp_SELECT_CC(N); break;
1933 case ISD::SETCC: Res = ExpandIntOp_SETCC(N); break;
1934 case ISD::SINT_TO_FP: Res = ExpandIntOp_SINT_TO_FP(N); break;
1935 case ISD::STORE: Res = ExpandIntOp_STORE(cast<StoreSDNode>(N), OpNo);
1937 case ISD::TRUNCATE: Res = ExpandIntOp_TRUNCATE(N); break;
1938 case ISD::UINT_TO_FP: Res = ExpandIntOp_UINT_TO_FP(N); break;
1941 // If the result is null, the sub-method took care of registering results etc.
1942 if (!Res.getNode()) return false;
1944 // If the result is N, the sub-method updated N in place. Tell the legalizer
1946 if (Res.getNode() == N)
1949 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1950 "Invalid operand expansion");
1952 ReplaceValueWith(SDValue(N, 0), Res);
1956 /// IntegerExpandSetCCOperands - Expand the operands of a comparison. This code
1957 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1958 void DAGTypeLegalizer::IntegerExpandSetCCOperands(SDValue &NewLHS,
1960 ISD::CondCode &CCCode,
1962 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1963 GetExpandedInteger(NewLHS, LHSLo, LHSHi);
1964 GetExpandedInteger(NewRHS, RHSLo, RHSHi);
1966 MVT VT = NewLHS.getValueType();
1968 if (CCCode == ISD::SETEQ || CCCode == ISD::SETNE) {
1969 if (RHSLo == RHSHi) {
1970 if (ConstantSDNode *RHSCST = dyn_cast<ConstantSDNode>(RHSLo)) {
1971 if (RHSCST->isAllOnesValue()) {
1972 // Equality comparison to -1.
1973 NewLHS = DAG.getNode(ISD::AND, dl,
1974 LHSLo.getValueType(), LHSLo, LHSHi);
1981 NewLHS = DAG.getNode(ISD::XOR, dl, LHSLo.getValueType(), LHSLo, RHSLo);
1982 NewRHS = DAG.getNode(ISD::XOR, dl, LHSLo.getValueType(), LHSHi, RHSHi);
1983 NewLHS = DAG.getNode(ISD::OR, dl, NewLHS.getValueType(), NewLHS, NewRHS);
1984 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1988 // If this is a comparison of the sign bit, just look at the top part.
1990 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(NewRHS))
1991 if ((CCCode == ISD::SETLT && CST->isNullValue()) || // X < 0
1992 (CCCode == ISD::SETGT && CST->isAllOnesValue())) { // X > -1
1998 // FIXME: This generated code sucks.
1999 ISD::CondCode LowCC;
2001 default: assert(0 && "Unknown integer setcc!");
2003 case ISD::SETULT: LowCC = ISD::SETULT; break;
2005 case ISD::SETUGT: LowCC = ISD::SETUGT; break;
2007 case ISD::SETULE: LowCC = ISD::SETULE; break;
2009 case ISD::SETUGE: LowCC = ISD::SETUGE; break;
2012 // Tmp1 = lo(op1) < lo(op2) // Always unsigned comparison
2013 // Tmp2 = hi(op1) < hi(op2) // Signedness depends on operands
2014 // dest = hi(op1) == hi(op2) ? Tmp1 : Tmp2;
2016 // NOTE: on targets without efficient SELECT of bools, we can always use
2017 // this identity: (B1 ? B2 : B3) --> (B1 & B2)|(!B1&B3)
2018 TargetLowering::DAGCombinerInfo DagCombineInfo(DAG, false, true, NULL);
2020 Tmp1 = TLI.SimplifySetCC(TLI.getSetCCResultType(LHSLo.getValueType()),
2021 LHSLo, RHSLo, LowCC, false, DagCombineInfo);
2022 if (!Tmp1.getNode())
2023 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
2024 LHSLo, RHSLo, LowCC);
2025 Tmp2 = TLI.SimplifySetCC(TLI.getSetCCResultType(LHSHi.getValueType()),
2026 LHSHi, RHSHi, CCCode, false, DagCombineInfo);
2027 if (!Tmp2.getNode())
2028 Tmp2 = DAG.getNode(ISD::SETCC, dl,
2029 TLI.getSetCCResultType(LHSHi.getValueType()),
2030 LHSHi, RHSHi, DAG.getCondCode(CCCode));
2032 ConstantSDNode *Tmp1C = dyn_cast<ConstantSDNode>(Tmp1.getNode());
2033 ConstantSDNode *Tmp2C = dyn_cast<ConstantSDNode>(Tmp2.getNode());
2034 if ((Tmp1C && Tmp1C->isNullValue()) ||
2035 (Tmp2C && Tmp2C->isNullValue() &&
2036 (CCCode == ISD::SETLE || CCCode == ISD::SETGE ||
2037 CCCode == ISD::SETUGE || CCCode == ISD::SETULE)) ||
2038 (Tmp2C && Tmp2C->getAPIntValue() == 1 &&
2039 (CCCode == ISD::SETLT || CCCode == ISD::SETGT ||
2040 CCCode == ISD::SETUGT || CCCode == ISD::SETULT))) {
2041 // low part is known false, returns high part.
2042 // For LE / GE, if high part is known false, ignore the low part.
2043 // For LT / GT, if high part is known true, ignore the low part.
2049 NewLHS = TLI.SimplifySetCC(TLI.getSetCCResultType(LHSHi.getValueType()),
2050 LHSHi, RHSHi, ISD::SETEQ, false, DagCombineInfo);
2051 if (!NewLHS.getNode())
2052 NewLHS = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
2053 LHSHi, RHSHi, ISD::SETEQ);
2054 NewLHS = DAG.getNode(ISD::SELECT, dl, Tmp1.getValueType(),
2055 NewLHS, Tmp1, Tmp2);
2059 SDValue DAGTypeLegalizer::ExpandIntOp_BR_CC(SDNode *N) {
2060 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
2061 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
2062 IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
2064 // If ExpandSetCCOperands returned a scalar, we need to compare the result
2065 // against zero to select between true and false values.
2066 if (NewRHS.getNode() == 0) {
2067 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
2068 CCCode = ISD::SETNE;
2071 // Update N to have the operands specified.
2072 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
2073 DAG.getCondCode(CCCode), NewLHS, NewRHS,
2077 SDValue DAGTypeLegalizer::ExpandIntOp_SELECT_CC(SDNode *N) {
2078 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
2079 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
2080 IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
2082 // If ExpandSetCCOperands returned a scalar, we need to compare the result
2083 // against zero to select between true and false values.
2084 if (NewRHS.getNode() == 0) {
2085 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
2086 CCCode = ISD::SETNE;
2089 // Update N to have the operands specified.
2090 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
2091 N->getOperand(2), N->getOperand(3),
2092 DAG.getCondCode(CCCode));
2095 SDValue DAGTypeLegalizer::ExpandIntOp_SETCC(SDNode *N) {
2096 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
2097 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
2098 IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
2100 // If ExpandSetCCOperands returned a scalar, use it.
2101 if (NewRHS.getNode() == 0) {
2102 assert(NewLHS.getValueType() == N->getValueType(0) &&
2103 "Unexpected setcc expansion!");
2107 // Otherwise, update N to have the operands specified.
2108 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
2109 DAG.getCondCode(CCCode));
2112 SDValue DAGTypeLegalizer::ExpandIntOp_SINT_TO_FP(SDNode *N) {
2113 SDValue Op = N->getOperand(0);
2114 MVT DstVT = N->getValueType(0);
2115 RTLIB::Libcall LC = RTLIB::getSINTTOFP(Op.getValueType(), DstVT);
2116 assert(LC != RTLIB::UNKNOWN_LIBCALL &&
2117 "Don't know how to expand this SINT_TO_FP!");
2118 return MakeLibCall(LC, DstVT, &Op, 1, true, N->getDebugLoc());
2121 SDValue DAGTypeLegalizer::ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo) {
2122 if (ISD::isNormalStore(N))
2123 return ExpandOp_NormalStore(N, OpNo);
2125 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
2126 assert(OpNo == 1 && "Can only expand the stored value so far");
2128 MVT VT = N->getOperand(1).getValueType();
2129 MVT NVT = TLI.getTypeToTransformTo(VT);
2130 SDValue Ch = N->getChain();
2131 SDValue Ptr = N->getBasePtr();
2132 int SVOffset = N->getSrcValueOffset();
2133 unsigned Alignment = N->getAlignment();
2134 bool isVolatile = N->isVolatile();
2135 DebugLoc dl = N->getDebugLoc();
2138 assert(NVT.isByteSized() && "Expanded type not byte sized!");
2140 if (N->getMemoryVT().bitsLE(NVT)) {
2141 GetExpandedInteger(N->getValue(), Lo, Hi);
2142 return DAG.getTruncStore(Ch, dl, Lo, Ptr, N->getSrcValue(), SVOffset,
2143 N->getMemoryVT(), isVolatile, Alignment);
2144 } else if (TLI.isLittleEndian()) {
2145 // Little-endian - low bits are at low addresses.
2146 GetExpandedInteger(N->getValue(), Lo, Hi);
2148 Lo = DAG.getStore(Ch, dl, Lo, Ptr, N->getSrcValue(), SVOffset,
2149 isVolatile, Alignment);
2151 unsigned ExcessBits =
2152 N->getMemoryVT().getSizeInBits() - NVT.getSizeInBits();
2153 MVT NEVT = MVT::getIntegerVT(ExcessBits);
2155 // Increment the pointer to the other half.
2156 unsigned IncrementSize = NVT.getSizeInBits()/8;
2157 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
2158 DAG.getIntPtrConstant(IncrementSize));
2159 Hi = DAG.getTruncStore(Ch, dl, Hi, Ptr, N->getSrcValue(),
2160 SVOffset+IncrementSize, NEVT,
2161 isVolatile, MinAlign(Alignment, IncrementSize));
2162 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi);
2164 // Big-endian - high bits are at low addresses. Favor aligned stores at
2165 // the cost of some bit-fiddling.
2166 GetExpandedInteger(N->getValue(), Lo, Hi);
2168 MVT EVT = N->getMemoryVT();
2169 unsigned EBytes = EVT.getStoreSizeInBits()/8;
2170 unsigned IncrementSize = NVT.getSizeInBits()/8;
2171 unsigned ExcessBits = (EBytes - IncrementSize)*8;
2172 MVT HiVT = MVT::getIntegerVT(EVT.getSizeInBits() - ExcessBits);
2174 if (ExcessBits < NVT.getSizeInBits()) {
2175 // Transfer high bits from the top of Lo to the bottom of Hi.
2176 Hi = DAG.getNode(ISD::SHL, dl, NVT, Hi,
2177 DAG.getConstant(NVT.getSizeInBits() - ExcessBits,
2178 TLI.getShiftAmountTy()));
2179 Hi = DAG.getNode(ISD::OR, dl, NVT, Hi,
2180 DAG.getNode(ISD::SRL, NVT, Lo,
2181 DAG.getConstant(ExcessBits,
2182 TLI.getShiftAmountTy())));
2185 // Store both the high bits and maybe some of the low bits.
2186 Hi = DAG.getTruncStore(Ch, dl, Hi, Ptr, N->getSrcValue(),
2187 SVOffset, HiVT, isVolatile, Alignment);
2189 // Increment the pointer to the other half.
2190 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
2191 DAG.getIntPtrConstant(IncrementSize));
2192 // Store the lowest ExcessBits bits in the second half.
2193 Lo = DAG.getTruncStore(Ch, dl, Lo, Ptr, N->getSrcValue(),
2194 SVOffset+IncrementSize,
2195 MVT::getIntegerVT(ExcessBits),
2196 isVolatile, MinAlign(Alignment, IncrementSize));
2197 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi);
2201 SDValue DAGTypeLegalizer::ExpandIntOp_TRUNCATE(SDNode *N) {
2203 GetExpandedInteger(N->getOperand(0), InL, InH);
2204 // Just truncate the low part of the source.
2205 return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), N->getValueType(0), InL);
2208 SDValue DAGTypeLegalizer::ExpandIntOp_UINT_TO_FP(SDNode *N) {
2209 SDValue Op = N->getOperand(0);
2210 MVT SrcVT = Op.getValueType();
2211 MVT DstVT = N->getValueType(0);
2212 DebugLoc dl = N->getDebugLoc();
2214 if (TLI.getOperationAction(ISD::SINT_TO_FP, SrcVT) == TargetLowering::Custom){
2215 // Do a signed conversion then adjust the result.
2216 SDValue SignedConv = DAG.getNode(ISD::SINT_TO_FP, dl, DstVT, Op);
2217 SignedConv = TLI.LowerOperation(SignedConv, DAG);
2219 // The result of the signed conversion needs adjusting if the 'sign bit' of
2220 // the incoming integer was set. To handle this, we dynamically test to see
2221 // if it is set, and, if so, add a fudge factor.
2223 const uint64_t F32TwoE32 = 0x4F800000ULL;
2224 const uint64_t F32TwoE64 = 0x5F800000ULL;
2225 const uint64_t F32TwoE128 = 0x7F800000ULL;
2228 if (SrcVT == MVT::i32)
2229 FF = APInt(32, F32TwoE32);
2230 else if (SrcVT == MVT::i64)
2231 FF = APInt(32, F32TwoE64);
2232 else if (SrcVT == MVT::i128)
2233 FF = APInt(32, F32TwoE128);
2235 assert(false && "Unsupported UINT_TO_FP!");
2237 // Check whether the sign bit is set.
2239 GetExpandedInteger(Op, Lo, Hi);
2240 SDValue SignSet = DAG.getSetCC(dl,
2241 TLI.getSetCCResultType(Hi.getValueType()),
2242 Hi, DAG.getConstant(0, Hi.getValueType()),
2245 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
2246 SDValue FudgePtr = DAG.getConstantPool(ConstantInt::get(FF.zext(64)),
2247 TLI.getPointerTy());
2249 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
2250 SDValue Zero = DAG.getIntPtrConstant(0);
2251 SDValue Four = DAG.getIntPtrConstant(4);
2252 if (TLI.isBigEndian()) std::swap(Zero, Four);
2253 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
2255 unsigned Alignment =
2256 1 << cast<ConstantPoolSDNode>(FudgePtr)->getAlignment();
2257 FudgePtr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(), FudgePtr, Offset);
2258 Alignment = std::min(Alignment, 4u);
2260 // Load the value out, extending it from f32 to the destination float type.
2261 // FIXME: Avoid the extend by constructing the right constant pool?
2262 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, DstVT, DAG.getEntryNode(),
2263 FudgePtr, NULL, 0, MVT::f32,
2265 return DAG.getNode(ISD::FADD, dl, DstVT, SignedConv, Fudge);
2268 // Otherwise, use a libcall.
2269 RTLIB::Libcall LC = RTLIB::getUINTTOFP(SrcVT, DstVT);
2270 assert(LC != RTLIB::UNKNOWN_LIBCALL &&
2271 "Don't know how to expand this UINT_TO_FP!");
2272 return MakeLibCall(LC, DstVT, &Op, 1, true, dl);