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/ADT/DenseSet.h"
24 #include "llvm/Support/Compiler.h"
25 #include "llvm/Support/Debug.h"
29 //===----------------------------------------------------------------------===//
30 /// DAGTypeLegalizer - This takes an arbitrary SelectionDAG as input and hacks
31 /// on it until only value types the target machine can handle are left. This
32 /// involves promoting small sizes to large sizes or splitting up large values
33 /// into small values.
35 class VISIBILITY_HIDDEN DAGTypeLegalizer {
39 // NodeIdFlags - This pass uses the NodeId on the SDNodes to hold information
40 // about the state of the node. The enum has all the values.
42 /// ReadyToProcess - All operands have been processed, so this node is ready
46 /// NewNode - This is a new node, not before seen, that was created in the
47 /// process of legalizing some other node.
50 /// Unanalyzed - This node's ID needs to be set to the number of its
51 /// unprocessed operands.
54 /// Processed - This is a node that has already been processed.
57 // 1+ - This is a node which has this many unprocessed operands.
61 Legal, // The target natively supports this type.
62 PromoteInteger, // Replace this integer type with a larger one.
63 ExpandInteger, // Split this integer type into two of half the size.
64 SoftenFloat, // Convert this float type to a same size integer type.
65 ExpandFloat, // Split this float type into two of half the size.
66 ScalarizeVector, // Replace this one-element vector with its element type.
67 SplitVector, // This vector type should be split into smaller vectors.
68 WidenVector // This vector type should be widened into larger vectors.
71 /// ValueTypeActions - This is a bitvector that contains two bits for each
72 /// simple value type, where the two bits correspond to the LegalizeAction
73 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
74 TargetLowering::ValueTypeActionImpl ValueTypeActions;
76 /// getTypeAction - Return how we should legalize values of this type, either
77 /// it is already legal, or we need to promote it to a larger integer type, or
78 /// we need to expand it into multiple registers of a smaller integer type, or
79 /// we need to split a vector type into smaller vector types, or we need to
80 /// convert it to a different type of the same size.
81 LegalizeAction getTypeAction(MVT VT) const {
82 switch (ValueTypeActions.getTypeAction(VT)) {
84 assert(false && "Unknown legalize action!");
85 case TargetLowering::Legal:
87 case TargetLowering::Promote:
89 // 1) For integers, use a larger integer type (e.g. i8 -> i32).
90 // 2) For vectors, use a wider vector type (e.g. v3i32 -> v4i32).
92 return PromoteInteger;
95 case TargetLowering::Expand:
97 // 1) split scalar in half, 2) convert a float to an integer,
98 // 3) scalarize a single-element vector, 4) split a vector in two.
101 return ExpandInteger;
102 else if (VT.getSizeInBits() ==
103 TLI.getTypeToTransformTo(VT).getSizeInBits())
107 } else if (VT.getVectorNumElements() == 1) {
108 return ScalarizeVector;
115 /// isTypeLegal - Return true if this type is legal on this target.
116 bool isTypeLegal(MVT VT) const {
117 return ValueTypeActions.getTypeAction(VT) == TargetLowering::Legal;
120 /// IgnoreNodeResults - Pretend all of this node's results are legal.
121 bool IgnoreNodeResults(SDNode *N) const {
122 return N->getOpcode() == ISD::TargetConstant ||
123 IgnoredNodesResultsSet.count(N);
126 /// IgnoredNode - Set of nodes whose result don't need to be legal.
127 DenseSet<SDNode*> IgnoredNodesResultsSet;
129 /// PromotedIntegers - For integer nodes that are below legal width, this map
130 /// indicates what promoted value to use.
131 DenseMap<SDValue, SDValue> PromotedIntegers;
133 /// ExpandedIntegers - For integer nodes that need to be expanded this map
134 /// indicates which operands are the expanded version of the input.
135 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedIntegers;
137 /// SoftenedFloats - For floating point nodes converted to integers of
138 /// the same size, this map indicates the converted value to use.
139 DenseMap<SDValue, SDValue> SoftenedFloats;
141 /// ExpandedFloats - For float nodes that need to be expanded this map
142 /// indicates which operands are the expanded version of the input.
143 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedFloats;
145 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
146 /// scalar value of type 'ty' to use.
147 DenseMap<SDValue, SDValue> ScalarizedVectors;
149 /// SplitVectors - For nodes that need to be split this map indicates
150 /// which operands are the expanded version of the input.
151 DenseMap<SDValue, std::pair<SDValue, SDValue> > SplitVectors;
153 /// WidenVectors - For vector nodes that need to be widened, indicates
154 /// the widen value to use.
155 DenseMap<SDValue, SDValue> WidenedVectors;
157 /// ReplacedValues - For values that have been replaced with another,
158 /// indicates the replacement value to use.
159 DenseMap<SDValue, SDValue> ReplacedValues;
161 /// Worklist - This defines a worklist of nodes to process. In order to be
162 /// pushed onto this worklist, all operands of a node must have already been
164 SmallVector<SDNode*, 128> Worklist;
167 explicit DAGTypeLegalizer(SelectionDAG &dag)
168 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
169 ValueTypeActions(TLI.getValueTypeActions()) {
170 assert(MVT::LAST_VALUETYPE <= 32 &&
171 "Too many value types for ValueTypeActions to hold!");
174 /// run - This is the main entry point for the type legalizer. This does a
175 /// top-down traversal of the dag, legalizing types as it goes. Returns
176 /// "true" if it made any changes.
179 void NoteDeletion(SDNode *Old, SDNode *New) {
182 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
183 ReplacedValues[SDValue(Old, i)] = SDValue(New, i);
187 SDNode *AnalyzeNewNode(SDNode *N);
188 void AnalyzeNewValue(SDValue &Val);
189 void ExpungeNode(SDNode *N);
190 void PerformExpensiveChecks();
191 void RemapValue(SDValue &N);
194 void ReplaceValueWith(SDValue From, SDValue To);
196 bool CustomLowerResults(SDNode *N, unsigned ResNo);
198 SDValue CreateStackStoreLoad(SDValue Op, MVT DestVT);
199 SDValue MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
200 const SDValue *Ops, unsigned NumOps, bool isSigned);
201 SDValue LibCallify(RTLIB::Libcall LC, SDNode *N, bool isSigned);
203 SDValue BitConvertToInteger(SDValue Op);
204 SDValue JoinIntegers(SDValue Lo, SDValue Hi);
205 void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
206 void SplitInteger(SDValue Op, MVT LoVT, MVT HiVT,
207 SDValue &Lo, SDValue &Hi);
209 SDValue GetVectorElementPointer(SDValue VecPtr, MVT EltVT, SDValue Index);
211 void SetIgnoredNodeResult(SDNode* N);
213 //===--------------------------------------------------------------------===//
214 // Integer Promotion Support: LegalizeIntegerTypes.cpp
215 //===--------------------------------------------------------------------===//
217 /// GetPromotedInteger - Given a processed operand Op which was promoted to a
218 /// larger integer type, this returns the promoted value. The low bits of the
219 /// promoted value corresponding to the original type are exactly equal to Op.
220 /// The extra bits contain rubbish, so the promoted value may need to be zero-
221 /// or sign-extended from the original type before it is usable (the helpers
222 /// SExtPromotedInteger and ZExtPromotedInteger can do this for you).
223 /// For example, if Op is an i16 and was promoted to an i32, then this method
224 /// returns an i32, the lower 16 bits of which coincide with Op, and the upper
225 /// 16 bits of which contain rubbish.
226 SDValue GetPromotedInteger(SDValue Op) {
227 SDValue &PromotedOp = PromotedIntegers[Op];
228 RemapValue(PromotedOp);
229 assert(PromotedOp.getNode() && "Operand wasn't promoted?");
232 void SetPromotedInteger(SDValue Op, SDValue Result);
234 /// SExtPromotedInteger - Get a promoted operand and sign extend it to the
236 SDValue SExtPromotedInteger(SDValue Op) {
237 MVT OldVT = Op.getValueType();
238 Op = GetPromotedInteger(Op);
239 return DAG.getNode(ISD::SIGN_EXTEND_INREG, Op.getValueType(), Op,
240 DAG.getValueType(OldVT));
243 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
245 SDValue ZExtPromotedInteger(SDValue Op) {
246 MVT OldVT = Op.getValueType();
247 Op = GetPromotedInteger(Op);
248 return DAG.getZeroExtendInReg(Op, OldVT);
251 // Integer Result Promotion.
252 void PromoteIntegerResult(SDNode *N, unsigned ResNo);
253 SDValue PromoteIntRes_AssertSext(SDNode *N);
254 SDValue PromoteIntRes_AssertZext(SDNode *N);
255 SDValue PromoteIntRes_Atomic1(AtomicSDNode *N);
256 SDValue PromoteIntRes_Atomic2(AtomicSDNode *N);
257 SDValue PromoteIntRes_BIT_CONVERT(SDNode *N);
258 SDValue PromoteIntRes_BSWAP(SDNode *N);
259 SDValue PromoteIntRes_BUILD_PAIR(SDNode *N);
260 SDValue PromoteIntRes_Constant(SDNode *N);
261 SDValue PromoteIntRes_CONVERT_RNDSAT(SDNode *N);
262 SDValue PromoteIntRes_CTLZ(SDNode *N);
263 SDValue PromoteIntRes_CTPOP(SDNode *N);
264 SDValue PromoteIntRes_CTTZ(SDNode *N);
265 SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
266 SDValue PromoteIntRes_FP_TO_XINT(SDNode *N);
267 SDValue PromoteIntRes_INT_EXTEND(SDNode *N);
268 SDValue PromoteIntRes_LOAD(LoadSDNode *N);
269 SDValue PromoteIntRes_Overflow(SDNode *N);
270 SDValue PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo);
271 SDValue PromoteIntRes_SDIV(SDNode *N);
272 SDValue PromoteIntRes_SELECT(SDNode *N);
273 SDValue PromoteIntRes_SELECT_CC(SDNode *N);
274 SDValue PromoteIntRes_SETCC(SDNode *N);
275 SDValue PromoteIntRes_SHL(SDNode *N);
276 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
277 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
278 SDValue PromoteIntRes_SRA(SDNode *N);
279 SDValue PromoteIntRes_SRL(SDNode *N);
280 SDValue PromoteIntRes_TRUNCATE(SDNode *N);
281 SDValue PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo);
282 SDValue PromoteIntRes_UDIV(SDNode *N);
283 SDValue PromoteIntRes_UNDEF(SDNode *N);
284 SDValue PromoteIntRes_VAARG(SDNode *N);
285 SDValue PromoteIntRes_XMULO(SDNode *N, unsigned ResNo);
287 // Integer Operand Promotion.
288 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
289 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
290 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
291 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
292 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
293 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
294 SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N);
295 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
296 SDValue PromoteIntOp_MEMBARRIER(SDNode *N);
297 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
298 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
299 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
300 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
301 SDValue PromoteIntOp_SINT_TO_FP(SDNode *N);
302 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
303 SDValue PromoteIntOp_TRUNCATE(SDNode *N);
304 SDValue PromoteIntOp_UINT_TO_FP(SDNode *N);
305 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
307 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
309 //===--------------------------------------------------------------------===//
310 // Integer Expansion Support: LegalizeIntegerTypes.cpp
311 //===--------------------------------------------------------------------===//
313 /// GetExpandedInteger - Given a processed operand Op which was expanded into
314 /// two integers of half the size, this returns the two halves. The low bits
315 /// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi.
316 /// For example, if Op is an i64 which was expanded into two i32's, then this
317 /// method returns the two i32's, with Lo being equal to the lower 32 bits of
318 /// Op, and Hi being equal to the upper 32 bits.
319 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
320 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
322 // Integer Result Expansion.
323 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
324 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
325 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
326 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
327 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
328 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
329 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
330 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
331 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
332 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
333 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
334 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
335 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
336 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
337 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
339 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
340 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
341 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
342 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
343 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
344 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
345 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
346 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
347 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
348 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
349 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
351 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
352 SDValue &Lo, SDValue &Hi);
353 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
355 // Integer Operand Expansion.
356 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
357 SDValue ExpandIntOp_BIT_CONVERT(SDNode *N);
358 SDValue ExpandIntOp_BR_CC(SDNode *N);
359 SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N);
360 SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
361 SDValue ExpandIntOp_SELECT_CC(SDNode *N);
362 SDValue ExpandIntOp_SETCC(SDNode *N);
363 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
364 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
365 SDValue ExpandIntOp_TRUNCATE(SDNode *N);
366 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
368 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
369 ISD::CondCode &CCCode);
371 //===--------------------------------------------------------------------===//
372 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
373 //===--------------------------------------------------------------------===//
375 /// GetSoftenedFloat - Given a processed operand Op which was converted to an
376 /// integer of the same size, this returns the integer. The integer contains
377 /// exactly the same bits as Op - only the type changed. For example, if Op
378 /// is an f32 which was softened to an i32, then this method returns an i32,
379 /// the bits of which coincide with those of Op.
380 SDValue GetSoftenedFloat(SDValue Op) {
381 SDValue &SoftenedOp = SoftenedFloats[Op];
382 RemapValue(SoftenedOp);
383 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
386 void SetSoftenedFloat(SDValue Op, SDValue Result);
388 // Result Float to Integer Conversion.
389 void SoftenFloatResult(SDNode *N, unsigned OpNo);
390 SDValue SoftenFloatRes_BIT_CONVERT(SDNode *N);
391 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
392 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
393 SDValue SoftenFloatRes_FABS(SDNode *N);
394 SDValue SoftenFloatRes_FADD(SDNode *N);
395 SDValue SoftenFloatRes_FCEIL(SDNode *N);
396 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
397 SDValue SoftenFloatRes_FCOS(SDNode *N);
398 SDValue SoftenFloatRes_FDIV(SDNode *N);
399 SDValue SoftenFloatRes_FEXP(SDNode *N);
400 SDValue SoftenFloatRes_FEXP2(SDNode *N);
401 SDValue SoftenFloatRes_FFLOOR(SDNode *N);
402 SDValue SoftenFloatRes_FLOG(SDNode *N);
403 SDValue SoftenFloatRes_FLOG2(SDNode *N);
404 SDValue SoftenFloatRes_FLOG10(SDNode *N);
405 SDValue SoftenFloatRes_FMUL(SDNode *N);
406 SDValue SoftenFloatRes_FNEARBYINT(SDNode *N);
407 SDValue SoftenFloatRes_FNEG(SDNode *N);
408 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
409 SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
410 SDValue SoftenFloatRes_FPOW(SDNode *N);
411 SDValue SoftenFloatRes_FPOWI(SDNode *N);
412 SDValue SoftenFloatRes_FRINT(SDNode *N);
413 SDValue SoftenFloatRes_FSIN(SDNode *N);
414 SDValue SoftenFloatRes_FSQRT(SDNode *N);
415 SDValue SoftenFloatRes_FSUB(SDNode *N);
416 SDValue SoftenFloatRes_FTRUNC(SDNode *N);
417 SDValue SoftenFloatRes_LOAD(SDNode *N);
418 SDValue SoftenFloatRes_SELECT(SDNode *N);
419 SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
420 SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
422 // Operand Float to Integer Conversion.
423 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
424 SDValue SoftenFloatOp_BIT_CONVERT(SDNode *N);
425 SDValue SoftenFloatOp_BR_CC(SDNode *N);
426 SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
427 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
428 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
429 SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
430 SDValue SoftenFloatOp_SETCC(SDNode *N);
431 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
433 void SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
434 ISD::CondCode &CCCode);
436 //===--------------------------------------------------------------------===//
437 // Float Expansion Support: LegalizeFloatTypes.cpp
438 //===--------------------------------------------------------------------===//
440 /// GetExpandedFloat - Given a processed operand Op which was expanded into
441 /// two floating point values of half the size, this returns the two halves.
442 /// The low bits of Op are exactly equal to the bits of Lo; the high bits
443 /// exactly equal Hi. For example, if Op is a ppcf128 which was expanded
444 /// into two f64's, then this method returns the two f64's, with Lo being
445 /// equal to the lower 64 bits of Op, and Hi to the upper 64 bits.
446 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
447 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
449 // Float Result Expansion.
450 void ExpandFloatResult(SDNode *N, unsigned ResNo);
451 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
452 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
453 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
454 void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi);
455 void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi);
456 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
457 void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi);
458 void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi);
459 void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi);
460 void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi);
461 void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi);
462 void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi);
463 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
464 void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi);
465 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
466 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
467 void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi);
468 void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi);
469 void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi);
470 void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi);
471 void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi);
472 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
473 void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi);
474 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
475 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
477 // Float Operand Expansion.
478 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
479 SDValue ExpandFloatOp_BR_CC(SDNode *N);
480 SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
481 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
482 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
483 SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
484 SDValue ExpandFloatOp_SETCC(SDNode *N);
485 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
487 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
488 ISD::CondCode &CCCode);
490 //===--------------------------------------------------------------------===//
491 // Scalarization Support: LegalizeVectorTypes.cpp
492 //===--------------------------------------------------------------------===//
494 /// GetScalarizedVector - Given a processed one-element vector Op which was
495 /// scalarized to its element type, this returns the element. For example,
496 /// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32.
497 SDValue GetScalarizedVector(SDValue Op) {
498 SDValue &ScalarizedOp = ScalarizedVectors[Op];
499 RemapValue(ScalarizedOp);
500 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
503 void SetScalarizedVector(SDValue Op, SDValue Result);
505 // Vector Result Scalarization: <1 x ty> -> ty.
506 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
507 SDValue ScalarizeVecRes_BinOp(SDNode *N);
508 SDValue ScalarizeVecRes_ShiftOp(SDNode *N);
509 SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
511 SDValue ScalarizeVecRes_BIT_CONVERT(SDNode *N);
512 SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N);
513 SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N);
514 SDValue ScalarizeVecRes_FPOWI(SDNode *N);
515 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
516 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
517 SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N);
518 SDValue ScalarizeVecRes_SELECT(SDNode *N);
519 SDValue ScalarizeVecRes_SELECT_CC(SDNode *N);
520 SDValue ScalarizeVecRes_UNDEF(SDNode *N);
521 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
522 SDValue ScalarizeVecRes_VSETCC(SDNode *N);
524 // Vector Operand Scalarization: <1 x ty> -> ty.
525 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
526 SDValue ScalarizeVecOp_BIT_CONVERT(SDNode *N);
527 SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
528 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
529 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
531 //===--------------------------------------------------------------------===//
532 // Vector Splitting Support: LegalizeVectorTypes.cpp
533 //===--------------------------------------------------------------------===//
535 /// GetSplitVector - Given a processed vector Op which was split into smaller
536 /// vectors, this method returns the smaller vectors. The first elements of
537 /// Op coincide with the elements of Lo; the remaining elements of Op coincide
538 /// with the elements of Hi: Op is what you would get by concatenating Lo and
539 /// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then
540 /// this method returns the two v4i32's, with Lo corresponding to the first 4
541 /// elements of Op, and Hi to the last 4 elements.
542 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
543 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
545 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
546 void SplitVectorResult(SDNode *N, unsigned OpNo);
547 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
548 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
550 void SplitVecRes_BIT_CONVERT(SDNode *N, SDValue &Lo, SDValue &Hi);
551 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
552 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
553 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
554 void SplitVecRes_CONVERT_RNDSAT(SDNode *N, SDValue &Lo, SDValue &Hi);
555 void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
556 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
557 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
558 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
559 void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
560 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
561 void SplitVecRes_VECTOR_SHUFFLE(SDNode *N, SDValue &Lo, SDValue &Hi);
562 void SplitVecRes_VSETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
564 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
565 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
566 SDValue SplitVecOp_UnaryOp(SDNode *N);
568 SDValue SplitVecOp_BIT_CONVERT(SDNode *N);
569 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
570 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
571 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
572 SDValue SplitVecOp_VECTOR_SHUFFLE(SDNode *N, unsigned OpNo);
574 //===--------------------------------------------------------------------===//
575 // Vector Widening Support: LegalizeVectorTypes.cpp
576 //===--------------------------------------------------------------------===//
577 SDValue GetWidenedVector(SDValue Op) {
578 SDValue &WidenedOp = WidenedVectors[Op];
579 RemapValue(WidenedOp);
580 assert(WidenedOp.getNode() && "Operand wasn't widened?");
583 void SetWidenedVector(SDValue Op, SDValue Result);
585 // Widen Vector Result Promotion.
586 void WidenVectorResult(SDNode *N, unsigned ResNo);
587 SDValue WidenVecRes_BIT_CONVERT(SDNode* N);
588 SDValue WidenVecRes_BUILD_VECTOR(SDNode* N);
589 SDValue WidenVecRes_CONCAT_VECTORS(SDNode* N);
590 SDValue WidenVecRes_CONVERT_RNDSAT(SDNode* N);
591 SDValue WidenVecRes_EXTRACT_SUBVECTOR(SDNode* N);
592 SDValue WidenVecRes_INSERT_VECTOR_ELT(SDNode* N);
593 SDValue WidenVecRes_LOAD(SDNode* N);
594 SDValue WidenVecRes_SCALAR_TO_VECTOR(SDNode* N);
595 SDValue WidenVecRes_SELECT(SDNode* N);
596 SDValue WidenVecRes_SELECT_CC(SDNode* N);
597 SDValue WidenVecRes_UNDEF(SDNode *N);
598 SDValue WidenVecRes_VECTOR_SHUFFLE(SDNode *N);
599 SDValue WidenVecRes_VSETCC(SDNode* N);
601 SDValue WidenVecRes_Binary(SDNode *N);
602 SDValue WidenVecRes_Convert(SDNode *N);
603 SDValue WidenVecRes_Shift(SDNode *N);
604 SDValue WidenVecRes_Unary(SDNode *N);
606 // Widen Vector Operand.
607 bool WidenVectorOperand(SDNode *N, unsigned ResNo);
608 SDValue WidenVecOp_CONCAT_VECTORS(SDNode *N);
609 SDValue WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
610 SDValue WidenVecOp_STORE(SDNode* N);
612 SDValue WidenVecOp_Convert(SDNode *N);
614 //===--------------------------------------------------------------------===//
615 // Vector Widening Utilities Support: LegalizeVectorTypes.cpp
616 //===--------------------------------------------------------------------===//
618 /// Helper genWidenVectorLoads - Helper function to generate a set of
619 /// loads to load a vector with a resulting wider type. It takes
620 /// ExtType: Extension type
621 /// LdChain: list of chains for the load we have generated.
622 /// Chain: incoming chain for the ld vector.
623 /// BasePtr: base pointer to load from.
624 /// SV: memory disambiguation source value.
625 /// SVOffset: memory disambiugation offset.
626 /// Alignment: alignment of the memory.
627 /// isVolatile: volatile load.
628 /// LdWidth: width of memory that we want to load.
629 /// ResType: the wider result result type for the resulting vector.
630 SDValue GenWidenVectorLoads(SmallVector<SDValue, 16>& LdChain, SDValue Chain,
631 SDValue BasePtr, const Value *SV,
632 int SVOffset, unsigned Alignment,
633 bool isVolatile, unsigned LdWidth,
636 /// Helper genWidenVectorStores - Helper function to generate a set of
637 /// stores to store a widen vector into non widen memory
639 /// StChain: list of chains for the stores we have generated
640 /// Chain: incoming chain for the ld vector
641 /// BasePtr: base pointer to load from
642 /// SV: memory disambiguation source value
643 /// SVOffset: memory disambiugation offset
644 /// Alignment: alignment of the memory
645 /// isVolatile: volatile lod
646 /// ValOp: value to store
647 /// StWidth: width of memory that we want to store
648 void GenWidenVectorStores(SmallVector<SDValue, 16>& StChain, SDValue Chain,
649 SDValue BasePtr, const Value *SV,
650 int SVOffset, unsigned Alignment,
651 bool isVolatile, SDValue ValOp,
654 /// Modifies a vector input (widen or narrows) to a vector of NVT. The
655 /// input vector must have the same element type as NVT.
656 SDValue ModifyToType(SDValue InOp, MVT WidenVT);
659 //===--------------------------------------------------------------------===//
660 // Generic Splitting: LegalizeTypesGeneric.cpp
661 //===--------------------------------------------------------------------===//
663 // Legalization methods which only use that the illegal type is split into two
664 // not necessarily identical types. As such they can be used for splitting
665 // vectors and expanding integers and floats.
667 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
668 if (Op.getValueType().isVector())
669 GetSplitVector(Op, Lo, Hi);
670 else if (Op.getValueType().isInteger())
671 GetExpandedInteger(Op, Lo, Hi);
673 GetExpandedFloat(Op, Lo, Hi);
676 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
677 /// which is split (or expanded) into two not necessarily identical pieces.
678 void GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT);
680 // Generic Result Splitting.
681 void SplitRes_MERGE_VALUES(SDNode *N, SDValue &Lo, SDValue &Hi);
682 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
683 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
684 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
686 //===--------------------------------------------------------------------===//
687 // Generic Expansion: LegalizeTypesGeneric.cpp
688 //===--------------------------------------------------------------------===//
690 // Legalization methods which only use that the illegal type is split into two
691 // identical types of half the size, and that the Lo/Hi part is stored first
692 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
693 // such they can be used for expanding integers and floats.
695 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
696 if (Op.getValueType().isInteger())
697 GetExpandedInteger(Op, Lo, Hi);
699 GetExpandedFloat(Op, Lo, Hi);
702 // Generic Result Expansion.
703 void ExpandRes_BIT_CONVERT (SDNode *N, SDValue &Lo, SDValue &Hi);
704 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
705 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
706 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
707 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
708 void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
710 // Generic Operand Expansion.
711 SDValue ExpandOp_BIT_CONVERT (SDNode *N);
712 SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
713 SDValue ExpandOp_EXTRACT_ELEMENT (SDNode *N);
714 SDValue ExpandOp_INSERT_VECTOR_ELT(SDNode *N);
715 SDValue ExpandOp_SCALAR_TO_VECTOR (SDNode *N);
716 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
719 } // end namespace llvm.