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, not before seen, that was created in the
46 /// process of legalizing some other node.
49 /// Unanalyzed - This node's ID needs to be set to the number of its
50 /// unprocessed operands.
53 /// Processed - This is a node that has already been processed.
56 // 1+ - This is a node which has this many unprocessed operands.
60 Legal, // The target natively supports this type.
61 PromoteInteger, // Replace this integer type with a larger one.
62 ExpandInteger, // Split this integer type into two of half the size.
63 SoftenFloat, // Convert this float type to a same size integer type.
64 ExpandFloat, // Split this float type into two of half the size.
65 ScalarizeVector, // Replace this one-element vector with its element type.
66 SplitVector // This vector type should be split into smaller vectors.
69 /// ValueTypeActions - This is a bitvector that contains two bits for each
70 /// simple value type, where the two bits correspond to the LegalizeAction
71 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
72 TargetLowering::ValueTypeActionImpl ValueTypeActions;
74 /// getTypeAction - Return how we should legalize values of this type, either
75 /// it is already legal, or we need to promote it to a larger integer type, or
76 /// we need to expand it into multiple registers of a smaller integer type, or
77 /// we need to split a vector type into smaller vector types, or we need to
78 /// convert it to a different type of the same size.
79 LegalizeAction getTypeAction(MVT VT) const {
80 switch (ValueTypeActions.getTypeAction(VT)) {
82 assert(false && "Unknown legalize action!");
83 case TargetLowering::Legal:
85 case TargetLowering::Promote:
87 // 1) For integers, use a larger integer type (e.g. i8 -> i32).
88 // 2) For vectors, use a wider vector type (e.g. v3i32 -> v4i32).
90 return PromoteInteger;
91 else if (VT.getVectorNumElements() == 1)
92 return ScalarizeVector;
94 // TODO: move widen code to LegalizeTypes.
96 case TargetLowering::Expand:
98 // 1) split scalar in half, 2) convert a float to an integer,
99 // 3) scalarize a single-element vector, 4) split a vector in two.
100 if (!VT.isVector()) {
102 return ExpandInteger;
103 else if (VT.getSizeInBits() ==
104 TLI.getTypeToTransformTo(VT).getSizeInBits())
108 } else if (VT.getVectorNumElements() == 1) {
109 return ScalarizeVector;
116 /// isTypeLegal - Return true if this type is legal on this target.
117 bool isTypeLegal(MVT VT) const {
118 return ValueTypeActions.getTypeAction(VT) == TargetLowering::Legal;
121 /// IgnoreNodeResults - Pretend all of this node's results are legal.
122 bool IgnoreNodeResults(SDNode *N) const {
123 return N->getOpcode() == ISD::TargetConstant;
126 /// PromotedIntegers - For integer nodes that are below legal width, this map
127 /// indicates what promoted value to use.
128 DenseMap<SDValue, SDValue> PromotedIntegers;
130 /// ExpandedIntegers - For integer nodes that need to be expanded this map
131 /// indicates which operands are the expanded version of the input.
132 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedIntegers;
134 /// SoftenedFloats - For floating point nodes converted to integers of
135 /// the same size, this map indicates the converted value to use.
136 DenseMap<SDValue, SDValue> SoftenedFloats;
138 /// ExpandedFloats - For float nodes that need to be expanded this map
139 /// indicates which operands are the expanded version of the input.
140 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedFloats;
142 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
143 /// scalar value of type 'ty' to use.
144 DenseMap<SDValue, SDValue> ScalarizedVectors;
146 /// SplitVectors - For nodes that need to be split this map indicates
147 /// which operands are the expanded version of the input.
148 DenseMap<SDValue, std::pair<SDValue, SDValue> > SplitVectors;
150 /// ReplacedValues - For values that have been replaced with another,
151 /// indicates the replacement value to use.
152 DenseMap<SDValue, SDValue> ReplacedValues;
154 /// Worklist - This defines a worklist of nodes to process. In order to be
155 /// pushed onto this worklist, all operands of a node must have already been
157 SmallVector<SDNode*, 128> Worklist;
160 explicit DAGTypeLegalizer(SelectionDAG &dag)
161 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
162 ValueTypeActions(TLI.getValueTypeActions()) {
163 assert(MVT::LAST_VALUETYPE <= 32 &&
164 "Too many value types for ValueTypeActions to hold!");
167 /// run - This is the main entry point for the type legalizer. This does a
168 /// top-down traversal of the dag, legalizing types as it goes. Returns
169 /// "true" if it made any changes.
172 void NoteDeletion(SDNode *Old, SDNode *New) {
175 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
176 ReplacedValues[SDValue(Old, i)] = SDValue(New, i);
180 SDNode *AnalyzeNewNode(SDNode *N);
181 void AnalyzeNewValue(SDValue &Val);
182 void ExpungeNode(SDNode *N);
183 void PerformExpensiveChecks();
184 void RemapValue(SDValue &N);
187 void ReplaceValueWith(SDValue From, SDValue To);
189 bool CustomLowerResults(SDNode *N, unsigned ResNo);
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_Overflow(SDNode *N);
261 SDValue PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo);
262 SDValue PromoteIntRes_SDIV(SDNode *N);
263 SDValue PromoteIntRes_SELECT(SDNode *N);
264 SDValue PromoteIntRes_SELECT_CC(SDNode *N);
265 SDValue PromoteIntRes_SETCC(SDNode *N);
266 SDValue PromoteIntRes_SHL(SDNode *N);
267 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
268 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
269 SDValue PromoteIntRes_SRA(SDNode *N);
270 SDValue PromoteIntRes_SRL(SDNode *N);
271 SDValue PromoteIntRes_TRUNCATE(SDNode *N);
272 SDValue PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo);
273 SDValue PromoteIntRes_UDIV(SDNode *N);
274 SDValue PromoteIntRes_UNDEF(SDNode *N);
275 SDValue PromoteIntRes_VAARG(SDNode *N);
276 SDValue PromoteIntRes_XMULO(SDNode *N, unsigned ResNo);
278 // Integer Operand Promotion.
279 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
280 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
281 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
282 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
283 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
284 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
285 SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N);
286 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
287 SDValue PromoteIntOp_MEMBARRIER(SDNode *N);
288 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
289 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
290 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
291 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
292 SDValue PromoteIntOp_SINT_TO_FP(SDNode *N);
293 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
294 SDValue PromoteIntOp_TRUNCATE(SDNode *N);
295 SDValue PromoteIntOp_UINT_TO_FP(SDNode *N);
296 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
298 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
300 //===--------------------------------------------------------------------===//
301 // Integer Expansion Support: LegalizeIntegerTypes.cpp
302 //===--------------------------------------------------------------------===//
304 /// GetExpandedInteger - Given a processed operand Op which was expanded into
305 /// two integers of half the size, this returns the two halves. The low bits
306 /// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi.
307 /// For example, if Op is an i64 which was expanded into two i32's, then this
308 /// method returns the two i32's, with Lo being equal to the lower 32 bits of
309 /// Op, and Hi being equal to the upper 32 bits.
310 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
311 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
313 // Integer Result Expansion.
314 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
315 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
316 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
317 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
318 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
319 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
320 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
321 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
322 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
323 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
324 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
325 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
326 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
327 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
328 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
330 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
331 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
332 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
333 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
334 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
335 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
336 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
337 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
338 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
339 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
340 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
342 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
343 SDValue &Lo, SDValue &Hi);
344 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
346 // Integer Operand Expansion.
347 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
348 SDValue ExpandIntOp_BIT_CONVERT(SDNode *N);
349 SDValue ExpandIntOp_BR_CC(SDNode *N);
350 SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N);
351 SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
352 SDValue ExpandIntOp_SELECT_CC(SDNode *N);
353 SDValue ExpandIntOp_SETCC(SDNode *N);
354 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
355 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
356 SDValue ExpandIntOp_TRUNCATE(SDNode *N);
357 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
359 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
360 ISD::CondCode &CCCode);
362 //===--------------------------------------------------------------------===//
363 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
364 //===--------------------------------------------------------------------===//
366 /// GetSoftenedFloat - Given a processed operand Op which was converted to an
367 /// integer of the same size, this returns the integer. The integer contains
368 /// exactly the same bits as Op - only the type changed. For example, if Op
369 /// is an f32 which was softened to an i32, then this method returns an i32,
370 /// the bits of which coincide with those of Op.
371 SDValue GetSoftenedFloat(SDValue Op) {
372 SDValue &SoftenedOp = SoftenedFloats[Op];
373 RemapValue(SoftenedOp);
374 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
377 void SetSoftenedFloat(SDValue Op, SDValue Result);
379 // Result Float to Integer Conversion.
380 void SoftenFloatResult(SDNode *N, unsigned OpNo);
381 SDValue SoftenFloatRes_BIT_CONVERT(SDNode *N);
382 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
383 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
384 SDValue SoftenFloatRes_FABS(SDNode *N);
385 SDValue SoftenFloatRes_FADD(SDNode *N);
386 SDValue SoftenFloatRes_FCEIL(SDNode *N);
387 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
388 SDValue SoftenFloatRes_FCOS(SDNode *N);
389 SDValue SoftenFloatRes_FDIV(SDNode *N);
390 SDValue SoftenFloatRes_FEXP(SDNode *N);
391 SDValue SoftenFloatRes_FEXP2(SDNode *N);
392 SDValue SoftenFloatRes_FFLOOR(SDNode *N);
393 SDValue SoftenFloatRes_FLOG(SDNode *N);
394 SDValue SoftenFloatRes_FLOG2(SDNode *N);
395 SDValue SoftenFloatRes_FLOG10(SDNode *N);
396 SDValue SoftenFloatRes_FMUL(SDNode *N);
397 SDValue SoftenFloatRes_FNEARBYINT(SDNode *N);
398 SDValue SoftenFloatRes_FNEG(SDNode *N);
399 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
400 SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
401 SDValue SoftenFloatRes_FPOW(SDNode *N);
402 SDValue SoftenFloatRes_FPOWI(SDNode *N);
403 SDValue SoftenFloatRes_FRINT(SDNode *N);
404 SDValue SoftenFloatRes_FSIN(SDNode *N);
405 SDValue SoftenFloatRes_FSQRT(SDNode *N);
406 SDValue SoftenFloatRes_FSUB(SDNode *N);
407 SDValue SoftenFloatRes_FTRUNC(SDNode *N);
408 SDValue SoftenFloatRes_LOAD(SDNode *N);
409 SDValue SoftenFloatRes_SELECT(SDNode *N);
410 SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
411 SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
413 // Operand Float to Integer Conversion.
414 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
415 SDValue SoftenFloatOp_BIT_CONVERT(SDNode *N);
416 SDValue SoftenFloatOp_BR_CC(SDNode *N);
417 SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
418 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
419 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
420 SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
421 SDValue SoftenFloatOp_SETCC(SDNode *N);
422 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
424 void SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
425 ISD::CondCode &CCCode);
427 //===--------------------------------------------------------------------===//
428 // Float Expansion Support: LegalizeFloatTypes.cpp
429 //===--------------------------------------------------------------------===//
431 /// GetExpandedFloat - Given a processed operand Op which was expanded into
432 /// two floating point values of half the size, this returns the two halves.
433 /// The low bits of Op are exactly equal to the bits of Lo; the high bits
434 /// exactly equal Hi. For example, if Op is a ppcf128 which was expanded
435 /// into two f64's, then this method returns the two f64's, with Lo being
436 /// equal to the lower 64 bits of Op, and Hi to the upper 64 bits.
437 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
438 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
440 // Float Result Expansion.
441 void ExpandFloatResult(SDNode *N, unsigned ResNo);
442 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
443 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
444 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
445 void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi);
446 void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi);
447 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
448 void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi);
449 void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi);
450 void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi);
451 void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi);
452 void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi);
453 void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi);
454 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
455 void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi);
456 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
457 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
458 void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi);
459 void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi);
460 void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi);
461 void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi);
462 void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi);
463 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
464 void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi);
465 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
466 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
468 // Float Operand Expansion.
469 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
470 SDValue ExpandFloatOp_BR_CC(SDNode *N);
471 SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
472 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
473 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
474 SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
475 SDValue ExpandFloatOp_SETCC(SDNode *N);
476 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
478 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
479 ISD::CondCode &CCCode);
481 //===--------------------------------------------------------------------===//
482 // Scalarization Support: LegalizeVectorTypes.cpp
483 //===--------------------------------------------------------------------===//
485 /// GetScalarizedVector - Given a processed one-element vector Op which was
486 /// scalarized to its element type, this returns the element. For example,
487 /// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32.
488 SDValue GetScalarizedVector(SDValue Op) {
489 SDValue &ScalarizedOp = ScalarizedVectors[Op];
490 RemapValue(ScalarizedOp);
491 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
494 void SetScalarizedVector(SDValue Op, SDValue Result);
496 // Vector Result Scalarization: <1 x ty> -> ty.
497 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
498 SDValue ScalarizeVecRes_BinOp(SDNode *N);
499 SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
501 SDValue ScalarizeVecRes_BIT_CONVERT(SDNode *N);
502 SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N);
503 SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N);
504 SDValue ScalarizeVecRes_FPOWI(SDNode *N);
505 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
506 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
507 SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N);
508 SDValue ScalarizeVecRes_SELECT(SDNode *N);
509 SDValue ScalarizeVecRes_SELECT_CC(SDNode *N);
510 SDValue ScalarizeVecRes_UNDEF(SDNode *N);
511 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
512 SDValue ScalarizeVecRes_VSETCC(SDNode *N);
514 // Vector Operand Scalarization: <1 x ty> -> ty.
515 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
516 SDValue ScalarizeVecOp_BIT_CONVERT(SDNode *N);
517 SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
518 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
519 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
521 //===--------------------------------------------------------------------===//
522 // Vector Splitting Support: LegalizeVectorTypes.cpp
523 //===--------------------------------------------------------------------===//
525 /// GetSplitVector - Given a processed vector Op which was split into smaller
526 /// vectors, this method returns the smaller vectors. The first elements of
527 /// Op coincide with the elements of Lo; the remaining elements of Op coincide
528 /// with the elements of Hi: Op is what you would get by concatenating Lo and
529 /// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then
530 /// this method returns the two v4i32's, with Lo corresponding to the first 4
531 /// elements of Op, and Hi to the last 4 elements.
532 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
533 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
535 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
536 void SplitVectorResult(SDNode *N, unsigned OpNo);
537 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
538 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
540 void SplitVecRes_BIT_CONVERT(SDNode *N, SDValue &Lo, SDValue &Hi);
541 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
542 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
543 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
544 void SplitVecRes_CONVERT_RNDSAT(SDNode *N, SDValue &Lo, SDValue &Hi);
545 void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
546 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
547 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
548 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
549 void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
550 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
551 void SplitVecRes_VECTOR_SHUFFLE(SDNode *N, SDValue &Lo, SDValue &Hi);
552 void SplitVecRes_VSETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
554 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
555 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
556 SDValue SplitVecOp_UnaryOp(SDNode *N);
558 SDValue SplitVecOp_BIT_CONVERT(SDNode *N);
559 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
560 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
561 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
562 SDValue SplitVecOp_VECTOR_SHUFFLE(SDNode *N, unsigned OpNo);
564 //===--------------------------------------------------------------------===//
565 // Generic Splitting: LegalizeTypesGeneric.cpp
566 //===--------------------------------------------------------------------===//
568 // Legalization methods which only use that the illegal type is split into two
569 // not necessarily identical types. As such they can be used for splitting
570 // vectors and expanding integers and floats.
572 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
573 if (Op.getValueType().isVector())
574 GetSplitVector(Op, Lo, Hi);
575 else if (Op.getValueType().isInteger())
576 GetExpandedInteger(Op, Lo, Hi);
578 GetExpandedFloat(Op, Lo, Hi);
581 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
582 /// which is split (or expanded) into two not necessarily identical pieces.
583 void GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT);
585 // Generic Result Splitting.
586 void SplitRes_MERGE_VALUES(SDNode *N, SDValue &Lo, SDValue &Hi);
587 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
588 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
589 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
591 //===--------------------------------------------------------------------===//
592 // Generic Expansion: LegalizeTypesGeneric.cpp
593 //===--------------------------------------------------------------------===//
595 // Legalization methods which only use that the illegal type is split into two
596 // identical types of half the size, and that the Lo/Hi part is stored first
597 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
598 // such they can be used for expanding integers and floats.
600 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
601 if (Op.getValueType().isInteger())
602 GetExpandedInteger(Op, Lo, Hi);
604 GetExpandedFloat(Op, Lo, Hi);
607 // Generic Result Expansion.
608 void ExpandRes_BIT_CONVERT (SDNode *N, SDValue &Lo, SDValue &Hi);
609 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
610 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
611 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
612 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
613 void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
615 // Generic Operand Expansion.
616 SDValue ExpandOp_BIT_CONVERT (SDNode *N);
617 SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
618 SDValue ExpandOp_EXTRACT_ELEMENT (SDNode *N);
619 SDValue ExpandOp_INSERT_VECTOR_ELT(SDNode *N);
620 SDValue ExpandOp_SCALAR_TO_VECTOR (SDNode *N);
621 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
624 } // end namespace llvm.