1 //===-- LegalizeTypes.h - Definition of the DAG Type Legalizer class ------===//
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 DAGTypeLegalizer class. This is a private interface
11 // shared between the code that implements the SelectionDAG::LegalizeTypes
14 //===----------------------------------------------------------------------===//
16 #ifndef SELECTIONDAG_LEGALIZETYPES_H
17 #define SELECTIONDAG_LEGALIZETYPES_H
19 #define DEBUG_TYPE "legalize-types"
20 #include "llvm/CodeGen/SelectionDAG.h"
21 #include "llvm/Target/TargetLowering.h"
22 #include "llvm/ADT/DenseMap.h"
23 #include "llvm/Support/Compiler.h"
24 #include "llvm/Support/Debug.h"
28 //===----------------------------------------------------------------------===//
29 /// DAGTypeLegalizer - This takes an arbitrary SelectionDAG as input and hacks
30 /// on it until only value types the target machine can handle are left. This
31 /// involves promoting small sizes to large sizes or splitting up large values
32 /// into small values.
34 class VISIBILITY_HIDDEN DAGTypeLegalizer {
38 // NodeIdFlags - This pass uses the NodeId on the SDNodes to hold information
39 // about the state of the node. The enum has all the values.
41 /// ReadyToProcess - All operands have been processed, so this node is ready
45 /// NewNode - This is a new node that was created in the process of
46 /// legalizing some other node.
49 /// Processed - This is a node that has already been processed.
52 // 1+ - This is a node which has this many unlegalized operands.
56 Legal, // The target natively supports this type.
57 PromoteInteger, // Replace this integer type with a larger one.
58 ExpandInteger, // Split this integer type into two of half the size.
59 SoftenFloat, // Convert this float type to a same size integer type.
60 ExpandFloat, // Split this float type into two of half the size.
61 ScalarizeVector, // Replace this one-element vector with its element type.
62 SplitVector // This vector type should be split into smaller vectors.
65 /// ValueTypeActions - This is a bitvector that contains two bits for each
66 /// simple value type, where the two bits correspond to the LegalizeAction
67 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
68 TargetLowering::ValueTypeActionImpl ValueTypeActions;
70 /// getTypeAction - Return how we should legalize values of this type, either
71 /// it is already legal, or we need to promote it to a larger integer type, or
72 /// we need to expand it into multiple registers of a smaller integer type, or
73 /// we need to split a vector type into smaller vector types, or we need to
74 /// convert it to a different type of the same size.
75 LegalizeAction getTypeAction(MVT VT) const {
76 switch (ValueTypeActions.getTypeAction(VT)) {
78 assert(false && "Unknown legalize action!");
79 case TargetLowering::Legal:
81 case TargetLowering::Promote:
83 // 1) For integers, use a larger integer type (e.g. i8 -> i32).
84 // 2) For vectors, use a wider vector type (e.g. v3i32 -> v4i32).
86 return PromoteInteger;
87 else if (VT.getVectorNumElements() == 1)
88 return ScalarizeVector;
90 // TODO: move widen code to LegalizeTypes.
92 case TargetLowering::Expand:
94 // 1) split scalar in half, 2) convert a float to an integer,
95 // 3) scalarize a single-element vector, 4) split a vector in two.
99 else if (VT.getSizeInBits() ==
100 TLI.getTypeToTransformTo(VT).getSizeInBits())
104 } else if (VT.getVectorNumElements() == 1) {
105 return ScalarizeVector;
112 /// isTypeLegal - Return true if this type is legal on this target.
113 bool isTypeLegal(MVT VT) const {
114 return ValueTypeActions.getTypeAction(VT) == TargetLowering::Legal;
117 /// IgnoreNodeResults - Pretend all of this node's results are legal.
118 bool IgnoreNodeResults(SDNode *N) const {
119 return N->getOpcode() == ISD::TargetConstant;
122 /// PromotedIntegers - For integer nodes that are below legal width, this map
123 /// indicates what promoted value to use.
124 DenseMap<SDValue, SDValue> PromotedIntegers;
126 /// ExpandedIntegers - For integer nodes that need to be expanded this map
127 /// indicates which operands are the expanded version of the input.
128 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedIntegers;
130 /// SoftenedFloats - For floating point nodes converted to integers of
131 /// the same size, this map indicates the converted value to use.
132 DenseMap<SDValue, SDValue> SoftenedFloats;
134 /// ExpandedFloats - For float nodes that need to be expanded this map
135 /// indicates which operands are the expanded version of the input.
136 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedFloats;
138 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
139 /// scalar value of type 'ty' to use.
140 DenseMap<SDValue, SDValue> ScalarizedVectors;
142 /// SplitVectors - For nodes that need to be split this map indicates
143 /// which operands are the expanded version of the input.
144 DenseMap<SDValue, std::pair<SDValue, SDValue> > SplitVectors;
146 /// ReplacedValues - For values that have been replaced with another,
147 /// indicates the replacement value to use.
148 DenseMap<SDValue, SDValue> ReplacedValues;
150 /// Worklist - This defines a worklist of nodes to process. In order to be
151 /// pushed onto this worklist, all operands of a node must have already been
153 SmallVector<SDNode*, 128> Worklist;
156 explicit DAGTypeLegalizer(SelectionDAG &dag)
157 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
158 ValueTypeActions(TLI.getValueTypeActions()) {
159 assert(MVT::LAST_VALUETYPE <= 32 &&
160 "Too many value types for ValueTypeActions to hold!");
165 /// ReanalyzeNode - Recompute the NodeId and correct processed operands
166 /// for the specified node, adding it to the worklist if ready.
167 void ReanalyzeNode(SDNode *N) {
168 N->setNodeId(NewNode);
170 // The node may have changed but we don't care.
173 void NoteDeletion(SDNode *Old, SDNode *New) {
176 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
177 ReplacedValues[SDValue(Old, i)] = SDValue(New, i);
181 SDNode *AnalyzeNewNode(SDNode *N);
182 void AnalyzeNewValue(SDValue &Val);
184 void ReplaceValueWith(SDValue From, SDValue To);
185 void ReplaceNodeWith(SDNode *From, SDNode *To);
187 void RemapValue(SDValue &N);
188 void ExpungeNode(SDNode *N);
191 SDValue CreateStackStoreLoad(SDValue Op, MVT DestVT);
192 SDValue MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
193 const SDValue *Ops, unsigned NumOps, bool isSigned);
194 SDValue LibCallify(RTLIB::Libcall LC, SDNode *N, bool isSigned);
196 SDValue BitConvertToInteger(SDValue Op);
197 SDValue JoinIntegers(SDValue Lo, SDValue Hi);
198 void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
199 void SplitInteger(SDValue Op, MVT LoVT, MVT HiVT,
200 SDValue &Lo, SDValue &Hi);
202 SDValue GetVectorElementPointer(SDValue VecPtr, MVT EltVT, SDValue Index);
204 //===--------------------------------------------------------------------===//
205 // Integer Promotion Support: LegalizeIntegerTypes.cpp
206 //===--------------------------------------------------------------------===//
208 /// GetPromotedInteger - Given a processed operand Op which was promoted to a
209 /// larger integer type, this returns the promoted value. The low bits of the
210 /// promoted value corresponding to the original type are exactly equal to Op.
211 /// The extra bits contain rubbish, so the promoted value may need to be zero-
212 /// or sign-extended from the original type before it is usable (the helpers
213 /// SExtPromotedInteger and ZExtPromotedInteger can do this for you).
214 /// For example, if Op is an i16 and was promoted to an i32, then this method
215 /// returns an i32, the lower 16 bits of which coincide with Op, and the upper
216 /// 16 bits of which contain rubbish.
217 SDValue GetPromotedInteger(SDValue Op) {
218 SDValue &PromotedOp = PromotedIntegers[Op];
219 RemapValue(PromotedOp);
220 assert(PromotedOp.getNode() && "Operand wasn't promoted?");
223 void SetPromotedInteger(SDValue Op, SDValue Result);
225 /// SExtPromotedInteger - Get a promoted operand and sign extend it to the
227 SDValue SExtPromotedInteger(SDValue Op) {
228 MVT OldVT = Op.getValueType();
229 Op = GetPromotedInteger(Op);
230 return DAG.getNode(ISD::SIGN_EXTEND_INREG, Op.getValueType(), Op,
231 DAG.getValueType(OldVT));
234 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
236 SDValue ZExtPromotedInteger(SDValue Op) {
237 MVT OldVT = Op.getValueType();
238 Op = GetPromotedInteger(Op);
239 return DAG.getZeroExtendInReg(Op, OldVT);
242 // Integer Result Promotion.
243 void PromoteIntegerResult(SDNode *N, unsigned ResNo);
244 SDValue PromoteIntRes_AssertSext(SDNode *N);
245 SDValue PromoteIntRes_AssertZext(SDNode *N);
246 SDValue PromoteIntRes_Atomic1(AtomicSDNode *N);
247 SDValue PromoteIntRes_Atomic2(AtomicSDNode *N);
248 SDValue PromoteIntRes_BIT_CONVERT(SDNode *N);
249 SDValue PromoteIntRes_BSWAP(SDNode *N);
250 SDValue PromoteIntRes_BUILD_PAIR(SDNode *N);
251 SDValue PromoteIntRes_Constant(SDNode *N);
252 SDValue PromoteIntRes_CONVERT_RNDSAT(SDNode *N);
253 SDValue PromoteIntRes_CTLZ(SDNode *N);
254 SDValue PromoteIntRes_CTPOP(SDNode *N);
255 SDValue PromoteIntRes_CTTZ(SDNode *N);
256 SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
257 SDValue PromoteIntRes_FP_TO_XINT(SDNode *N);
258 SDValue PromoteIntRes_INT_EXTEND(SDNode *N);
259 SDValue PromoteIntRes_LOAD(LoadSDNode *N);
260 SDValue PromoteIntRes_SDIV(SDNode *N);
261 SDValue PromoteIntRes_SELECT(SDNode *N);
262 SDValue PromoteIntRes_SELECT_CC(SDNode *N);
263 SDValue PromoteIntRes_SETCC(SDNode *N);
264 SDValue PromoteIntRes_SHL(SDNode *N);
265 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
266 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
267 SDValue PromoteIntRes_SRA(SDNode *N);
268 SDValue PromoteIntRes_SRL(SDNode *N);
269 SDValue PromoteIntRes_TRUNCATE(SDNode *N);
270 SDValue PromoteIntRes_UDIV(SDNode *N);
271 SDValue PromoteIntRes_UNDEF(SDNode *N);
272 SDValue PromoteIntRes_VAARG(SDNode *N);
274 // Integer Operand Promotion.
275 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
276 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
277 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
278 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
279 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
280 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
281 SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N);
282 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
283 SDValue PromoteIntOp_MEMBARRIER(SDNode *N);
284 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
285 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
286 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
287 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
288 SDValue PromoteIntOp_SINT_TO_FP(SDNode *N);
289 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
290 SDValue PromoteIntOp_TRUNCATE(SDNode *N);
291 SDValue PromoteIntOp_UINT_TO_FP(SDNode *N);
292 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
294 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
296 //===--------------------------------------------------------------------===//
297 // Integer Expansion Support: LegalizeIntegerTypes.cpp
298 //===--------------------------------------------------------------------===//
300 /// GetExpandedInteger - Given a processed operand Op which was expanded into
301 /// two integers of half the size, this returns the two halves. The low bits
302 /// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi.
303 /// For example, if Op is an i64 which was expanded into two i32's, then this
304 /// method returns the two i32's, with Lo being equal to the lower 32 bits of
305 /// Op, and Hi being equal to the upper 32 bits.
306 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
307 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
309 // Integer Result Expansion.
310 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
311 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
312 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
313 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
314 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
315 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
316 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
317 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
318 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
319 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
320 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
321 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
322 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
323 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
324 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
326 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
327 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
328 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
329 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
330 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
331 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
332 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
333 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
334 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
335 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
336 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
338 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
339 SDValue &Lo, SDValue &Hi);
340 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
342 // Integer Operand Expansion.
343 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
344 SDValue ExpandIntOp_BIT_CONVERT(SDNode *N);
345 SDValue ExpandIntOp_BR_CC(SDNode *N);
346 SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N);
347 SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
348 SDValue ExpandIntOp_SELECT_CC(SDNode *N);
349 SDValue ExpandIntOp_SETCC(SDNode *N);
350 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
351 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
352 SDValue ExpandIntOp_TRUNCATE(SDNode *N);
353 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
355 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
356 ISD::CondCode &CCCode);
358 //===--------------------------------------------------------------------===//
359 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
360 //===--------------------------------------------------------------------===//
362 /// GetSoftenedFloat - Given a processed operand Op which was converted to an
363 /// integer of the same size, this returns the integer. The integer contains
364 /// exactly the same bits as Op - only the type changed. For example, if Op
365 /// is an f32 which was softened to an i32, then this method returns an i32,
366 /// the bits of which coincide with those of Op.
367 SDValue GetSoftenedFloat(SDValue Op) {
368 SDValue &SoftenedOp = SoftenedFloats[Op];
369 RemapValue(SoftenedOp);
370 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
373 void SetSoftenedFloat(SDValue Op, SDValue Result);
375 // Result Float to Integer Conversion.
376 void SoftenFloatResult(SDNode *N, unsigned OpNo);
377 SDValue SoftenFloatRes_BIT_CONVERT(SDNode *N);
378 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
379 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
380 SDValue SoftenFloatRes_FABS(SDNode *N);
381 SDValue SoftenFloatRes_FADD(SDNode *N);
382 SDValue SoftenFloatRes_FCEIL(SDNode *N);
383 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
384 SDValue SoftenFloatRes_FCOS(SDNode *N);
385 SDValue SoftenFloatRes_FDIV(SDNode *N);
386 SDValue SoftenFloatRes_FEXP(SDNode *N);
387 SDValue SoftenFloatRes_FEXP2(SDNode *N);
388 SDValue SoftenFloatRes_FFLOOR(SDNode *N);
389 SDValue SoftenFloatRes_FLOG(SDNode *N);
390 SDValue SoftenFloatRes_FLOG2(SDNode *N);
391 SDValue SoftenFloatRes_FLOG10(SDNode *N);
392 SDValue SoftenFloatRes_FMUL(SDNode *N);
393 SDValue SoftenFloatRes_FNEARBYINT(SDNode *N);
394 SDValue SoftenFloatRes_FNEG(SDNode *N);
395 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
396 SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
397 SDValue SoftenFloatRes_FPOW(SDNode *N);
398 SDValue SoftenFloatRes_FPOWI(SDNode *N);
399 SDValue SoftenFloatRes_FRINT(SDNode *N);
400 SDValue SoftenFloatRes_FSIN(SDNode *N);
401 SDValue SoftenFloatRes_FSQRT(SDNode *N);
402 SDValue SoftenFloatRes_FSUB(SDNode *N);
403 SDValue SoftenFloatRes_FTRUNC(SDNode *N);
404 SDValue SoftenFloatRes_LOAD(SDNode *N);
405 SDValue SoftenFloatRes_SELECT(SDNode *N);
406 SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
407 SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
409 // Operand Float to Integer Conversion.
410 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
411 SDValue SoftenFloatOp_BIT_CONVERT(SDNode *N);
412 SDValue SoftenFloatOp_BR_CC(SDNode *N);
413 SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
414 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
415 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
416 SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
417 SDValue SoftenFloatOp_SETCC(SDNode *N);
418 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
420 void SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
421 ISD::CondCode &CCCode);
423 //===--------------------------------------------------------------------===//
424 // Float Expansion Support: LegalizeFloatTypes.cpp
425 //===--------------------------------------------------------------------===//
427 /// GetExpandedFloat - Given a processed operand Op which was expanded into
428 /// two floating point values of half the size, this returns the two halves.
429 /// The low bits of Op are exactly equal to the bits of Lo; the high bits
430 /// exactly equal Hi. For example, if Op is a ppcf128 which was expanded
431 /// into two f64's, then this method returns the two f64's, with Lo being
432 /// equal to the lower 64 bits of Op, and Hi to the upper 64 bits.
433 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
434 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
436 // Float Result Expansion.
437 void ExpandFloatResult(SDNode *N, unsigned ResNo);
438 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
439 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
440 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
441 void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi);
442 void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi);
443 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
444 void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi);
445 void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi);
446 void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi);
447 void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi);
448 void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi);
449 void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi);
450 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
451 void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi);
452 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
453 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
454 void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi);
455 void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi);
456 void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi);
457 void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi);
458 void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi);
459 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
460 void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi);
461 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
462 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
464 // Float Operand Expansion.
465 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
466 SDValue ExpandFloatOp_BR_CC(SDNode *N);
467 SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
468 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
469 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
470 SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
471 SDValue ExpandFloatOp_SETCC(SDNode *N);
472 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
474 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
475 ISD::CondCode &CCCode);
477 //===--------------------------------------------------------------------===//
478 // Scalarization Support: LegalizeVectorTypes.cpp
479 //===--------------------------------------------------------------------===//
481 /// GetScalarizedVector - Given a processed one-element vector Op which was
482 /// scalarized to its element type, this returns the element. For example,
483 /// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32.
484 SDValue GetScalarizedVector(SDValue Op) {
485 SDValue &ScalarizedOp = ScalarizedVectors[Op];
486 RemapValue(ScalarizedOp);
487 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
490 void SetScalarizedVector(SDValue Op, SDValue Result);
492 // Vector Result Scalarization: <1 x ty> -> ty.
493 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
494 SDValue ScalarizeVecRes_BinOp(SDNode *N);
495 SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
497 SDValue ScalarizeVecRes_BIT_CONVERT(SDNode *N);
498 SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N);
499 SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N);
500 SDValue ScalarizeVecRes_FPOWI(SDNode *N);
501 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
502 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
503 SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N);
504 SDValue ScalarizeVecRes_SELECT(SDNode *N);
505 SDValue ScalarizeVecRes_SELECT_CC(SDNode *N);
506 SDValue ScalarizeVecRes_UNDEF(SDNode *N);
507 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
508 SDValue ScalarizeVecRes_VSETCC(SDNode *N);
510 // Vector Operand Scalarization: <1 x ty> -> ty.
511 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
512 SDValue ScalarizeVecOp_BIT_CONVERT(SDNode *N);
513 SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
514 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
515 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
517 //===--------------------------------------------------------------------===//
518 // Vector Splitting Support: LegalizeVectorTypes.cpp
519 //===--------------------------------------------------------------------===//
521 /// GetSplitVector - Given a processed vector Op which was split into smaller
522 /// vectors, this method returns the smaller vectors. The first elements of
523 /// Op coincide with the elements of Lo; the remaining elements of Op coincide
524 /// with the elements of Hi: Op is what you would get by concatenating Lo and
525 /// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then
526 /// this method returns the two v4i32's, with Lo corresponding to the first 4
527 /// elements of Op, and Hi to the last 4 elements.
528 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
529 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
531 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
532 void SplitVectorResult(SDNode *N, unsigned OpNo);
533 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
534 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
536 void SplitVecRes_BIT_CONVERT(SDNode *N, SDValue &Lo, SDValue &Hi);
537 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
538 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
539 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
540 void SplitVecRes_CONVERT_RNDSAT(SDNode *N, SDValue &Lo, SDValue &Hi);
541 void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
542 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
543 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
544 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
545 void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
546 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
547 void SplitVecRes_VECTOR_SHUFFLE(SDNode *N, SDValue &Lo, SDValue &Hi);
548 void SplitVecRes_VSETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
550 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
551 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
552 SDValue SplitVecOp_UnaryOp(SDNode *N);
554 SDValue SplitVecOp_BIT_CONVERT(SDNode *N);
555 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
556 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
557 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
558 SDValue SplitVecOp_VECTOR_SHUFFLE(SDNode *N, unsigned OpNo);
560 //===--------------------------------------------------------------------===//
561 // Generic Splitting: LegalizeTypesGeneric.cpp
562 //===--------------------------------------------------------------------===//
564 // Legalization methods which only use that the illegal type is split into two
565 // not necessarily identical types. As such they can be used for splitting
566 // vectors and expanding integers and floats.
568 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
569 if (Op.getValueType().isVector())
570 GetSplitVector(Op, Lo, Hi);
571 else if (Op.getValueType().isInteger())
572 GetExpandedInteger(Op, Lo, Hi);
574 GetExpandedFloat(Op, Lo, Hi);
577 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
578 /// which is split (or expanded) into two not necessarily identical pieces.
579 void GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT);
581 // Generic Result Splitting.
582 void SplitRes_MERGE_VALUES(SDNode *N, SDValue &Lo, SDValue &Hi);
583 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
584 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
585 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
587 //===--------------------------------------------------------------------===//
588 // Generic Expansion: LegalizeTypesGeneric.cpp
589 //===--------------------------------------------------------------------===//
591 // Legalization methods which only use that the illegal type is split into two
592 // identical types of half the size, and that the Lo/Hi part is stored first
593 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
594 // such they can be used for expanding integers and floats.
596 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
597 if (Op.getValueType().isInteger())
598 GetExpandedInteger(Op, Lo, Hi);
600 GetExpandedFloat(Op, Lo, Hi);
603 // Generic Result Expansion.
604 void ExpandRes_BIT_CONVERT (SDNode *N, SDValue &Lo, SDValue &Hi);
605 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
606 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
607 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
608 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
609 void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
611 // Generic Operand Expansion.
612 SDValue ExpandOp_BIT_CONVERT (SDNode *N);
613 SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
614 SDValue ExpandOp_EXTRACT_ELEMENT(SDNode *N);
615 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
619 } // end namespace llvm.