1 //===-- LegalizeTypes.h - DAG Type Legalizer class definition ---*- C++ -*-===//
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 LLVM_LIB_CODEGEN_SELECTIONDAG_LEGALIZETYPES_H
17 #define LLVM_LIB_CODEGEN_SELECTIONDAG_LEGALIZETYPES_H
19 #include "llvm/ADT/DenseMap.h"
20 #include "llvm/ADT/DenseSet.h"
21 #include "llvm/CodeGen/SelectionDAG.h"
22 #include "llvm/Support/Compiler.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Target/TargetLowering.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 LLVM_LIBRARY_VISIBILITY DAGTypeLegalizer {
35 const TargetLowering &TLI;
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 /// ValueTypeActions - This is a bitvector that contains two bits for each
61 /// simple value type, where the two bits correspond to the LegalizeAction
62 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
63 TargetLowering::ValueTypeActionImpl ValueTypeActions;
65 /// getTypeAction - Return how we should legalize values of this type.
66 TargetLowering::LegalizeTypeAction getTypeAction(EVT VT) const {
67 return TLI.getTypeAction(*DAG.getContext(), VT);
70 /// isTypeLegal - Return true if this type is legal on this target.
71 bool isTypeLegal(EVT VT) const {
72 return TLI.getTypeAction(*DAG.getContext(), VT) == TargetLowering::TypeLegal;
75 EVT getSetCCResultType(EVT VT) const {
76 return TLI.getSetCCResultType(*DAG.getContext(), VT);
79 /// IgnoreNodeResults - Pretend all of this node's results are legal.
80 bool IgnoreNodeResults(SDNode *N) const {
81 return N->getOpcode() == ISD::TargetConstant;
84 /// PromotedIntegers - For integer nodes that are below legal width, this map
85 /// indicates what promoted value to use.
86 SmallDenseMap<SDValue, SDValue, 8> PromotedIntegers;
88 /// ExpandedIntegers - For integer nodes that need to be expanded this map
89 /// indicates which operands are the expanded version of the input.
90 SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> ExpandedIntegers;
92 /// SoftenedFloats - For floating point nodes converted to integers of
93 /// the same size, this map indicates the converted value to use.
94 SmallDenseMap<SDValue, SDValue, 8> SoftenedFloats;
96 /// ExpandedFloats - For float nodes that need to be expanded this map
97 /// indicates which operands are the expanded version of the input.
98 SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> ExpandedFloats;
100 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
101 /// scalar value of type 'ty' to use.
102 SmallDenseMap<SDValue, SDValue, 8> ScalarizedVectors;
104 /// SplitVectors - For nodes that need to be split this map indicates
105 /// which operands are the expanded version of the input.
106 SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> SplitVectors;
108 /// WidenedVectors - For vector nodes that need to be widened, indicates
109 /// the widened value to use.
110 SmallDenseMap<SDValue, SDValue, 8> WidenedVectors;
112 /// ReplacedValues - For values that have been replaced with another,
113 /// indicates the replacement value to use.
114 SmallDenseMap<SDValue, SDValue, 8> ReplacedValues;
116 /// Worklist - This defines a worklist of nodes to process. In order to be
117 /// pushed onto this worklist, all operands of a node must have already been
119 SmallVector<SDNode*, 128> Worklist;
122 explicit DAGTypeLegalizer(SelectionDAG &dag)
123 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
124 ValueTypeActions(TLI.getValueTypeActions()) {
125 assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE &&
126 "Too many value types for ValueTypeActions to hold!");
129 /// run - This is the main entry point for the type legalizer. This does a
130 /// top-down traversal of the dag, legalizing types as it goes. Returns
131 /// "true" if it made any changes.
134 void NoteDeletion(SDNode *Old, SDNode *New) {
137 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
138 ReplacedValues[SDValue(Old, i)] = SDValue(New, i);
141 SelectionDAG &getDAG() const { return DAG; }
144 SDNode *AnalyzeNewNode(SDNode *N);
145 void AnalyzeNewValue(SDValue &Val);
146 void ExpungeNode(SDNode *N);
147 void PerformExpensiveChecks();
148 void RemapValue(SDValue &N);
151 SDValue BitConvertToInteger(SDValue Op);
152 SDValue BitConvertVectorToIntegerVector(SDValue Op);
153 SDValue CreateStackStoreLoad(SDValue Op, EVT DestVT);
154 bool CustomLowerNode(SDNode *N, EVT VT, bool LegalizeResult);
155 bool CustomWidenLowerNode(SDNode *N, EVT VT);
157 /// DisintegrateMERGE_VALUES - Replace each result of the given MERGE_VALUES
158 /// node with the corresponding input operand, except for the result 'ResNo',
159 /// for which the corresponding input operand is returned.
160 SDValue DisintegrateMERGE_VALUES(SDNode *N, unsigned ResNo);
162 SDValue GetVectorElementPointer(SDValue VecPtr, EVT EltVT, SDValue Index);
163 SDValue JoinIntegers(SDValue Lo, SDValue Hi);
164 SDValue LibCallify(RTLIB::Libcall LC, SDNode *N, bool isSigned);
166 std::pair<SDValue, SDValue> ExpandChainLibCall(RTLIB::Libcall LC,
167 SDNode *Node, bool isSigned);
168 std::pair<SDValue, SDValue> ExpandAtomic(SDNode *Node);
170 SDValue PromoteTargetBoolean(SDValue Bool, EVT ValVT);
171 void ReplaceValueWith(SDValue From, SDValue To);
172 void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
173 void SplitInteger(SDValue Op, EVT LoVT, EVT HiVT,
174 SDValue &Lo, SDValue &Hi);
176 //===--------------------------------------------------------------------===//
177 // Integer Promotion Support: LegalizeIntegerTypes.cpp
178 //===--------------------------------------------------------------------===//
180 /// GetPromotedInteger - Given a processed operand Op which was promoted to a
181 /// larger integer type, this returns the promoted value. The low bits of the
182 /// promoted value corresponding to the original type are exactly equal to Op.
183 /// The extra bits contain rubbish, so the promoted value may need to be zero-
184 /// or sign-extended from the original type before it is usable (the helpers
185 /// SExtPromotedInteger and ZExtPromotedInteger can do this for you).
186 /// For example, if Op is an i16 and was promoted to an i32, then this method
187 /// returns an i32, the lower 16 bits of which coincide with Op, and the upper
188 /// 16 bits of which contain rubbish.
189 SDValue GetPromotedInteger(SDValue Op) {
190 SDValue &PromotedOp = PromotedIntegers[Op];
191 RemapValue(PromotedOp);
192 assert(PromotedOp.getNode() && "Operand wasn't promoted?");
195 void SetPromotedInteger(SDValue Op, SDValue Result);
197 /// SExtPromotedInteger - Get a promoted operand and sign extend it to the
199 SDValue SExtPromotedInteger(SDValue Op) {
200 EVT OldVT = Op.getValueType();
202 Op = GetPromotedInteger(Op);
203 return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Op.getValueType(), Op,
204 DAG.getValueType(OldVT));
207 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
209 SDValue ZExtPromotedInteger(SDValue Op) {
210 EVT OldVT = Op.getValueType();
212 Op = GetPromotedInteger(Op);
213 return DAG.getZeroExtendInReg(Op, dl, OldVT.getScalarType());
216 // Integer Result Promotion.
217 void PromoteIntegerResult(SDNode *N, unsigned ResNo);
218 SDValue PromoteIntRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
219 SDValue PromoteIntRes_AssertSext(SDNode *N);
220 SDValue PromoteIntRes_AssertZext(SDNode *N);
221 SDValue PromoteIntRes_Atomic0(AtomicSDNode *N);
222 SDValue PromoteIntRes_Atomic1(AtomicSDNode *N);
223 SDValue PromoteIntRes_AtomicCmpSwap(AtomicSDNode *N, unsigned ResNo);
224 SDValue PromoteIntRes_EXTRACT_SUBVECTOR(SDNode *N);
225 SDValue PromoteIntRes_VECTOR_SHUFFLE(SDNode *N);
226 SDValue PromoteIntRes_BUILD_VECTOR(SDNode *N);
227 SDValue PromoteIntRes_SCALAR_TO_VECTOR(SDNode *N);
228 SDValue PromoteIntRes_INSERT_VECTOR_ELT(SDNode *N);
229 SDValue PromoteIntRes_CONCAT_VECTORS(SDNode *N);
230 SDValue PromoteIntRes_BITCAST(SDNode *N);
231 SDValue PromoteIntRes_BSWAP(SDNode *N);
232 SDValue PromoteIntRes_BUILD_PAIR(SDNode *N);
233 SDValue PromoteIntRes_Constant(SDNode *N);
234 SDValue PromoteIntRes_CONVERT_RNDSAT(SDNode *N);
235 SDValue PromoteIntRes_CTLZ(SDNode *N);
236 SDValue PromoteIntRes_CTPOP(SDNode *N);
237 SDValue PromoteIntRes_CTTZ(SDNode *N);
238 SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
239 SDValue PromoteIntRes_FP_TO_XINT(SDNode *N);
240 SDValue PromoteIntRes_FP_TO_FP16(SDNode *N);
241 SDValue PromoteIntRes_INT_EXTEND(SDNode *N);
242 SDValue PromoteIntRes_LOAD(LoadSDNode *N);
243 SDValue PromoteIntRes_Overflow(SDNode *N);
244 SDValue PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo);
245 SDValue PromoteIntRes_SDIV(SDNode *N);
246 SDValue PromoteIntRes_SELECT(SDNode *N);
247 SDValue PromoteIntRes_VSELECT(SDNode *N);
248 SDValue PromoteIntRes_SELECT_CC(SDNode *N);
249 SDValue PromoteIntRes_SETCC(SDNode *N);
250 SDValue PromoteIntRes_SHL(SDNode *N);
251 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
252 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
253 SDValue PromoteIntRes_SRA(SDNode *N);
254 SDValue PromoteIntRes_SRL(SDNode *N);
255 SDValue PromoteIntRes_TRUNCATE(SDNode *N);
256 SDValue PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo);
257 SDValue PromoteIntRes_UDIV(SDNode *N);
258 SDValue PromoteIntRes_UNDEF(SDNode *N);
259 SDValue PromoteIntRes_VAARG(SDNode *N);
260 SDValue PromoteIntRes_XMULO(SDNode *N, unsigned ResNo);
262 // Integer Operand Promotion.
263 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
264 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
265 SDValue PromoteIntOp_ATOMIC_STORE(AtomicSDNode *N);
266 SDValue PromoteIntOp_BITCAST(SDNode *N);
267 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
268 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
269 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
270 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
271 SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N);
272 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
273 SDValue PromoteIntOp_EXTRACT_ELEMENT(SDNode *N);
274 SDValue PromoteIntOp_EXTRACT_VECTOR_ELT(SDNode *N);
275 SDValue PromoteIntOp_CONCAT_VECTORS(SDNode *N);
276 SDValue PromoteIntOp_SCALAR_TO_VECTOR(SDNode *N);
277 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
278 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
279 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
280 SDValue PromoteIntOp_VSETCC(SDNode *N, unsigned OpNo);
281 SDValue PromoteIntOp_Shift(SDNode *N);
282 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
283 SDValue PromoteIntOp_SINT_TO_FP(SDNode *N);
284 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
285 SDValue PromoteIntOp_TRUNCATE(SDNode *N);
286 SDValue PromoteIntOp_UINT_TO_FP(SDNode *N);
287 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
289 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
291 //===--------------------------------------------------------------------===//
292 // Integer Expansion Support: LegalizeIntegerTypes.cpp
293 //===--------------------------------------------------------------------===//
295 /// GetExpandedInteger - Given a processed operand Op which was expanded into
296 /// two integers of half the size, this returns the two halves. The low bits
297 /// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi.
298 /// For example, if Op is an i64 which was expanded into two i32's, then this
299 /// method returns the two i32's, with Lo being equal to the lower 32 bits of
300 /// Op, and Hi being equal to the upper 32 bits.
301 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
302 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
304 // Integer Result Expansion.
305 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
306 void ExpandIntRes_MERGE_VALUES (SDNode *N, unsigned ResNo,
307 SDValue &Lo, SDValue &Hi);
308 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
309 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
310 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
311 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
312 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
313 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
314 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
315 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
316 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
317 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
318 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
319 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
320 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
321 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
323 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
324 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
325 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
326 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
327 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
328 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
329 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
330 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
331 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
332 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
333 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
335 void ExpandIntRes_SADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi);
336 void ExpandIntRes_UADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi);
337 void ExpandIntRes_XMULO (SDNode *N, SDValue &Lo, SDValue &Hi);
339 void ExpandIntRes_ATOMIC_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
341 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
342 SDValue &Lo, SDValue &Hi);
343 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
344 bool ExpandShiftWithUnknownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
346 // Integer Operand Expansion.
347 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
348 SDValue ExpandIntOp_BITCAST(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_Shift(SDNode *N);
355 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
356 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
357 SDValue ExpandIntOp_TRUNCATE(SDNode *N);
358 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
359 SDValue ExpandIntOp_RETURNADDR(SDNode *N);
360 SDValue ExpandIntOp_ATOMIC_STORE(SDNode *N);
362 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
363 ISD::CondCode &CCCode, SDLoc dl);
365 //===--------------------------------------------------------------------===//
366 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
367 //===--------------------------------------------------------------------===//
369 /// GetSoftenedFloat - Given a processed operand Op which was converted to an
370 /// integer of the same size, this returns the integer. The integer contains
371 /// exactly the same bits as Op - only the type changed. For example, if Op
372 /// is an f32 which was softened to an i32, then this method returns an i32,
373 /// the bits of which coincide with those of Op.
374 SDValue GetSoftenedFloat(SDValue Op) {
375 SDValue &SoftenedOp = SoftenedFloats[Op];
376 RemapValue(SoftenedOp);
377 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
380 void SetSoftenedFloat(SDValue Op, SDValue Result);
382 // Result Float to Integer Conversion.
383 void SoftenFloatResult(SDNode *N, unsigned OpNo);
384 SDValue SoftenFloatRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
385 SDValue SoftenFloatRes_BITCAST(SDNode *N);
386 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
387 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
388 SDValue SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N);
389 SDValue SoftenFloatRes_FABS(SDNode *N);
390 SDValue SoftenFloatRes_FMINNUM(SDNode *N);
391 SDValue SoftenFloatRes_FMAXNUM(SDNode *N);
392 SDValue SoftenFloatRes_FADD(SDNode *N);
393 SDValue SoftenFloatRes_FCEIL(SDNode *N);
394 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
395 SDValue SoftenFloatRes_FCOS(SDNode *N);
396 SDValue SoftenFloatRes_FDIV(SDNode *N);
397 SDValue SoftenFloatRes_FEXP(SDNode *N);
398 SDValue SoftenFloatRes_FEXP2(SDNode *N);
399 SDValue SoftenFloatRes_FFLOOR(SDNode *N);
400 SDValue SoftenFloatRes_FLOG(SDNode *N);
401 SDValue SoftenFloatRes_FLOG2(SDNode *N);
402 SDValue SoftenFloatRes_FLOG10(SDNode *N);
403 SDValue SoftenFloatRes_FMA(SDNode *N);
404 SDValue SoftenFloatRes_FMUL(SDNode *N);
405 SDValue SoftenFloatRes_FNEARBYINT(SDNode *N);
406 SDValue SoftenFloatRes_FNEG(SDNode *N);
407 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
408 SDValue SoftenFloatRes_FP16_TO_FP(SDNode *N);
409 SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
410 SDValue SoftenFloatRes_FPOW(SDNode *N);
411 SDValue SoftenFloatRes_FPOWI(SDNode *N);
412 SDValue SoftenFloatRes_FREM(SDNode *N);
413 SDValue SoftenFloatRes_FRINT(SDNode *N);
414 SDValue SoftenFloatRes_FROUND(SDNode *N);
415 SDValue SoftenFloatRes_FSIN(SDNode *N);
416 SDValue SoftenFloatRes_FSQRT(SDNode *N);
417 SDValue SoftenFloatRes_FSUB(SDNode *N);
418 SDValue SoftenFloatRes_FTRUNC(SDNode *N);
419 SDValue SoftenFloatRes_LOAD(SDNode *N);
420 SDValue SoftenFloatRes_SELECT(SDNode *N);
421 SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
422 SDValue SoftenFloatRes_UNDEF(SDNode *N);
423 SDValue SoftenFloatRes_VAARG(SDNode *N);
424 SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
426 // Operand Float to Integer Conversion.
427 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
428 SDValue SoftenFloatOp_BITCAST(SDNode *N);
429 SDValue SoftenFloatOp_BR_CC(SDNode *N);
430 SDValue SoftenFloatOp_FP_EXTEND(SDNode *N);
431 SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
432 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
433 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
434 SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
435 SDValue SoftenFloatOp_SETCC(SDNode *N);
436 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
438 //===--------------------------------------------------------------------===//
439 // Float Expansion Support: LegalizeFloatTypes.cpp
440 //===--------------------------------------------------------------------===//
442 /// GetExpandedFloat - Given a processed operand Op which was expanded into
443 /// two floating point values of half the size, this returns the two halves.
444 /// The low bits of Op are exactly equal to the bits of Lo; the high bits
445 /// exactly equal Hi. For example, if Op is a ppcf128 which was expanded
446 /// into two f64's, then this method returns the two f64's, with Lo being
447 /// equal to the lower 64 bits of Op, and Hi to the upper 64 bits.
448 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
449 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
451 // Float Result Expansion.
452 void ExpandFloatResult(SDNode *N, unsigned ResNo);
453 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
454 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
455 void ExpandFloatRes_FMINNUM (SDNode *N, SDValue &Lo, SDValue &Hi);
456 void ExpandFloatRes_FMAXNUM (SDNode *N, SDValue &Lo, SDValue &Hi);
457 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
458 void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi);
459 void ExpandFloatRes_FCOPYSIGN (SDNode *N, SDValue &Lo, SDValue &Hi);
460 void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi);
461 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
462 void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi);
463 void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi);
464 void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi);
465 void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi);
466 void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi);
467 void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi);
468 void ExpandFloatRes_FMA (SDNode *N, SDValue &Lo, SDValue &Hi);
469 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
470 void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi);
471 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
472 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
473 void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi);
474 void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi);
475 void ExpandFloatRes_FREM (SDNode *N, SDValue &Lo, SDValue &Hi);
476 void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi);
477 void ExpandFloatRes_FROUND (SDNode *N, SDValue &Lo, SDValue &Hi);
478 void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi);
479 void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi);
480 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
481 void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi);
482 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
483 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
485 // Float Operand Expansion.
486 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
487 SDValue ExpandFloatOp_BR_CC(SDNode *N);
488 SDValue ExpandFloatOp_FCOPYSIGN(SDNode *N);
489 SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
490 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
491 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
492 SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
493 SDValue ExpandFloatOp_SETCC(SDNode *N);
494 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
496 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
497 ISD::CondCode &CCCode, SDLoc dl);
499 //===--------------------------------------------------------------------===//
500 // Scalarization Support: LegalizeVectorTypes.cpp
501 //===--------------------------------------------------------------------===//
503 /// GetScalarizedVector - Given a processed one-element vector Op which was
504 /// scalarized to its element type, this returns the element. For example,
505 /// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32.
506 SDValue GetScalarizedVector(SDValue Op) {
507 SDValue &ScalarizedOp = ScalarizedVectors[Op];
508 RemapValue(ScalarizedOp);
509 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
512 void SetScalarizedVector(SDValue Op, SDValue Result);
514 // Vector Result Scalarization: <1 x ty> -> ty.
515 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
516 SDValue ScalarizeVecRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
517 SDValue ScalarizeVecRes_BinOp(SDNode *N);
518 SDValue ScalarizeVecRes_TernaryOp(SDNode *N);
519 SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
520 SDValue ScalarizeVecRes_InregOp(SDNode *N);
522 SDValue ScalarizeVecRes_BITCAST(SDNode *N);
523 SDValue ScalarizeVecRes_BUILD_VECTOR(SDNode *N);
524 SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N);
525 SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N);
526 SDValue ScalarizeVecRes_FP_ROUND(SDNode *N);
527 SDValue ScalarizeVecRes_FPOWI(SDNode *N);
528 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
529 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
530 SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N);
531 SDValue ScalarizeVecRes_SIGN_EXTEND_INREG(SDNode *N);
532 SDValue ScalarizeVecRes_VSELECT(SDNode *N);
533 SDValue ScalarizeVecRes_SELECT(SDNode *N);
534 SDValue ScalarizeVecRes_SELECT_CC(SDNode *N);
535 SDValue ScalarizeVecRes_SETCC(SDNode *N);
536 SDValue ScalarizeVecRes_UNDEF(SDNode *N);
537 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
538 SDValue ScalarizeVecRes_VSETCC(SDNode *N);
540 // Vector Operand Scalarization: <1 x ty> -> ty.
541 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
542 SDValue ScalarizeVecOp_BITCAST(SDNode *N);
543 SDValue ScalarizeVecOp_UnaryOp(SDNode *N);
544 SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
545 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
546 SDValue ScalarizeVecOp_VSELECT(SDNode *N);
547 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
548 SDValue ScalarizeVecOp_FP_ROUND(SDNode *N, unsigned OpNo);
550 //===--------------------------------------------------------------------===//
551 // Vector Splitting Support: LegalizeVectorTypes.cpp
552 //===--------------------------------------------------------------------===//
554 /// GetSplitVector - Given a processed vector Op which was split into vectors
555 /// of half the size, this method returns the halves. The first elements of
556 /// Op coincide with the elements of Lo; the remaining elements of Op coincide
557 /// with the elements of Hi: Op is what you would get by concatenating Lo and
558 /// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then
559 /// this method returns the two v4i32's, with Lo corresponding to the first 4
560 /// elements of Op, and Hi to the last 4 elements.
561 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
562 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
564 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
565 void SplitVectorResult(SDNode *N, unsigned OpNo);
566 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
567 void SplitVecRes_TernaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
568 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
569 void SplitVecRes_ExtendOp(SDNode *N, SDValue &Lo, SDValue &Hi);
570 void SplitVecRes_InregOp(SDNode *N, SDValue &Lo, SDValue &Hi);
572 void SplitVecRes_BITCAST(SDNode *N, SDValue &Lo, SDValue &Hi);
573 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
574 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
575 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
576 void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
577 void SplitVecRes_INSERT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
578 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
579 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
580 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
581 void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
582 void SplitVecRes_SIGN_EXTEND_INREG(SDNode *N, SDValue &Lo, SDValue &Hi);
583 void SplitVecRes_SETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
584 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
585 void SplitVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N, SDValue &Lo,
588 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
589 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
590 SDValue SplitVecOp_VSELECT(SDNode *N, unsigned OpNo);
591 SDValue SplitVecOp_UnaryOp(SDNode *N);
593 SDValue SplitVecOp_BITCAST(SDNode *N);
594 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
595 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
596 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
597 SDValue SplitVecOp_CONCAT_VECTORS(SDNode *N);
598 SDValue SplitVecOp_TRUNCATE(SDNode *N);
599 SDValue SplitVecOp_VSETCC(SDNode *N);
600 SDValue SplitVecOp_FP_ROUND(SDNode *N);
602 //===--------------------------------------------------------------------===//
603 // Vector Widening Support: LegalizeVectorTypes.cpp
604 //===--------------------------------------------------------------------===//
606 /// GetWidenedVector - Given a processed vector Op which was widened into a
607 /// larger vector, this method returns the larger vector. The elements of
608 /// the returned vector consist of the elements of Op followed by elements
609 /// containing rubbish. For example, if Op is a v2i32 that was widened to a
610 /// v4i32, then this method returns a v4i32 for which the first two elements
611 /// are the same as those of Op, while the last two elements contain rubbish.
612 SDValue GetWidenedVector(SDValue Op) {
613 SDValue &WidenedOp = WidenedVectors[Op];
614 RemapValue(WidenedOp);
615 assert(WidenedOp.getNode() && "Operand wasn't widened?");
618 void SetWidenedVector(SDValue Op, SDValue Result);
620 // Widen Vector Result Promotion.
621 void WidenVectorResult(SDNode *N, unsigned ResNo);
622 SDValue WidenVecRes_MERGE_VALUES(SDNode* N, unsigned ResNo);
623 SDValue WidenVecRes_BITCAST(SDNode* N);
624 SDValue WidenVecRes_BUILD_VECTOR(SDNode* N);
625 SDValue WidenVecRes_CONCAT_VECTORS(SDNode* N);
626 SDValue WidenVecRes_CONVERT_RNDSAT(SDNode* N);
627 SDValue WidenVecRes_EXTRACT_SUBVECTOR(SDNode* N);
628 SDValue WidenVecRes_INSERT_VECTOR_ELT(SDNode* N);
629 SDValue WidenVecRes_LOAD(SDNode* N);
630 SDValue WidenVecRes_SCALAR_TO_VECTOR(SDNode* N);
631 SDValue WidenVecRes_SIGN_EXTEND_INREG(SDNode* N);
632 SDValue WidenVecRes_SELECT(SDNode* N);
633 SDValue WidenVecRes_SELECT_CC(SDNode* N);
634 SDValue WidenVecRes_SETCC(SDNode* N);
635 SDValue WidenVecRes_UNDEF(SDNode *N);
636 SDValue WidenVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N);
637 SDValue WidenVecRes_VSETCC(SDNode* N);
639 SDValue WidenVecRes_Ternary(SDNode *N);
640 SDValue WidenVecRes_Binary(SDNode *N);
641 SDValue WidenVecRes_BinaryCanTrap(SDNode *N);
642 SDValue WidenVecRes_Convert(SDNode *N);
643 SDValue WidenVecRes_POWI(SDNode *N);
644 SDValue WidenVecRes_Shift(SDNode *N);
645 SDValue WidenVecRes_Unary(SDNode *N);
646 SDValue WidenVecRes_InregOp(SDNode *N);
648 // Widen Vector Operand.
649 bool WidenVectorOperand(SDNode *N, unsigned OpNo);
650 SDValue WidenVecOp_BITCAST(SDNode *N);
651 SDValue WidenVecOp_CONCAT_VECTORS(SDNode *N);
652 SDValue WidenVecOp_EXTEND(SDNode *N);
653 SDValue WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
654 SDValue WidenVecOp_EXTRACT_SUBVECTOR(SDNode *N);
655 SDValue WidenVecOp_STORE(SDNode* N);
656 SDValue WidenVecOp_SETCC(SDNode* N);
658 SDValue WidenVecOp_Convert(SDNode *N);
660 //===--------------------------------------------------------------------===//
661 // Vector Widening Utilities Support: LegalizeVectorTypes.cpp
662 //===--------------------------------------------------------------------===//
664 /// Helper GenWidenVectorLoads - Helper function to generate a set of
665 /// loads to load a vector with a resulting wider type. It takes
666 /// LdChain: list of chains for the load to be generated.
667 /// Ld: load to widen
668 SDValue GenWidenVectorLoads(SmallVectorImpl<SDValue> &LdChain,
671 /// GenWidenVectorExtLoads - Helper function to generate a set of extension
672 /// loads to load a ector with a resulting wider type. It takes
673 /// LdChain: list of chains for the load to be generated.
674 /// Ld: load to widen
675 /// ExtType: extension element type
676 SDValue GenWidenVectorExtLoads(SmallVectorImpl<SDValue> &LdChain,
677 LoadSDNode *LD, ISD::LoadExtType ExtType);
679 /// Helper genWidenVectorStores - Helper function to generate a set of
680 /// stores to store a widen vector into non-widen memory
681 /// StChain: list of chains for the stores we have generated
682 /// ST: store of a widen value
683 void GenWidenVectorStores(SmallVectorImpl<SDValue> &StChain, StoreSDNode *ST);
685 /// Helper genWidenVectorTruncStores - Helper function to generate a set of
686 /// stores to store a truncate widen vector into non-widen memory
687 /// StChain: list of chains for the stores we have generated
688 /// ST: store of a widen value
689 void GenWidenVectorTruncStores(SmallVectorImpl<SDValue> &StChain,
692 /// Modifies a vector input (widen or narrows) to a vector of NVT. The
693 /// input vector must have the same element type as NVT.
694 SDValue ModifyToType(SDValue InOp, EVT WidenVT);
697 //===--------------------------------------------------------------------===//
698 // Generic Splitting: LegalizeTypesGeneric.cpp
699 //===--------------------------------------------------------------------===//
701 // Legalization methods which only use that the illegal type is split into two
702 // not necessarily identical types. As such they can be used for splitting
703 // vectors and expanding integers and floats.
705 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
706 if (Op.getValueType().isVector())
707 GetSplitVector(Op, Lo, Hi);
708 else if (Op.getValueType().isInteger())
709 GetExpandedInteger(Op, Lo, Hi);
711 GetExpandedFloat(Op, Lo, Hi);
714 /// GetPairElements - Use ISD::EXTRACT_ELEMENT nodes to extract the low and
715 /// high parts of the given value.
716 void GetPairElements(SDValue Pair, SDValue &Lo, SDValue &Hi);
718 // Generic Result Splitting.
719 void SplitRes_MERGE_VALUES(SDNode *N, unsigned ResNo,
720 SDValue &Lo, SDValue &Hi);
721 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
722 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
723 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
725 //===--------------------------------------------------------------------===//
726 // Generic Expansion: LegalizeTypesGeneric.cpp
727 //===--------------------------------------------------------------------===//
729 // Legalization methods which only use that the illegal type is split into two
730 // identical types of half the size, and that the Lo/Hi part is stored first
731 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
732 // such they can be used for expanding integers and floats.
734 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
735 if (Op.getValueType().isInteger())
736 GetExpandedInteger(Op, Lo, Hi);
738 GetExpandedFloat(Op, Lo, Hi);
742 /// This function will split the integer \p Op into \p NumElements
743 /// operations of type \p EltVT and store them in \p Ops.
744 void IntegerToVector(SDValue Op, unsigned NumElements,
745 SmallVectorImpl<SDValue> &Ops, EVT EltVT);
747 // Generic Result Expansion.
748 void ExpandRes_MERGE_VALUES (SDNode *N, unsigned ResNo,
749 SDValue &Lo, SDValue &Hi);
750 void ExpandRes_BITCAST (SDNode *N, SDValue &Lo, SDValue &Hi);
751 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
752 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
753 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
754 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
755 void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
757 // Generic Operand Expansion.
758 SDValue ExpandOp_BITCAST (SDNode *N);
759 SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
760 SDValue ExpandOp_EXTRACT_ELEMENT (SDNode *N);
761 SDValue ExpandOp_INSERT_VECTOR_ELT(SDNode *N);
762 SDValue ExpandOp_SCALAR_TO_VECTOR (SDNode *N);
763 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
766 } // end namespace llvm.