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 SELECTIONDAG_LEGALIZETYPES_H
17 #define SELECTIONDAG_LEGALIZETYPES_H
19 #define DEBUG_TYPE "legalize-types"
20 #include "llvm/ADT/DenseMap.h"
21 #include "llvm/ADT/DenseSet.h"
22 #include "llvm/CodeGen/SelectionDAG.h"
23 #include "llvm/Support/Compiler.h"
24 #include "llvm/Support/Debug.h"
25 #include "llvm/Target/TargetLowering.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 LLVM_LIBRARY_VISIBILITY DAGTypeLegalizer {
36 const TargetLowering &TLI;
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 /// ValueTypeActions - This is a bitvector that contains two bits for each
62 /// simple value type, where the two bits correspond to the LegalizeAction
63 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
64 TargetLowering::ValueTypeActionImpl ValueTypeActions;
66 /// getTypeAction - Return how we should legalize values of this type.
67 TargetLowering::LegalizeTypeAction getTypeAction(EVT VT) const {
68 return TLI.getTypeAction(*DAG.getContext(), VT);
71 /// isTypeLegal - Return true if this type is legal on this target.
72 bool isTypeLegal(EVT VT) const {
73 return TLI.getTypeAction(*DAG.getContext(), VT) == TargetLowering::TypeLegal;
76 EVT getSetCCResultType(EVT VT) const {
77 return TLI.getSetCCResultType(*DAG.getContext(), VT);
80 /// IgnoreNodeResults - Pretend all of this node's results are legal.
81 bool IgnoreNodeResults(SDNode *N) const {
82 return N->getOpcode() == ISD::TargetConstant;
85 /// PromotedIntegers - For integer nodes that are below legal width, this map
86 /// indicates what promoted value to use.
87 SmallDenseMap<SDValue, SDValue, 8> PromotedIntegers;
89 /// ExpandedIntegers - For integer nodes that need to be expanded this map
90 /// indicates which operands are the expanded version of the input.
91 SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> ExpandedIntegers;
93 /// SoftenedFloats - For floating point nodes converted to integers of
94 /// the same size, this map indicates the converted value to use.
95 SmallDenseMap<SDValue, SDValue, 8> SoftenedFloats;
97 /// ExpandedFloats - For float nodes that need to be expanded this map
98 /// indicates which operands are the expanded version of the input.
99 SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> ExpandedFloats;
101 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
102 /// scalar value of type 'ty' to use.
103 SmallDenseMap<SDValue, SDValue, 8> ScalarizedVectors;
105 /// SplitVectors - For nodes that need to be split this map indicates
106 /// which operands are the expanded version of the input.
107 SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> SplitVectors;
109 /// WidenedVectors - For vector nodes that need to be widened, indicates
110 /// the widened value to use.
111 SmallDenseMap<SDValue, SDValue, 8> WidenedVectors;
113 /// ReplacedValues - For values that have been replaced with another,
114 /// indicates the replacement value to use.
115 SmallDenseMap<SDValue, SDValue, 8> ReplacedValues;
117 /// Worklist - This defines a worklist of nodes to process. In order to be
118 /// pushed onto this worklist, all operands of a node must have already been
120 SmallVector<SDNode*, 128> Worklist;
123 explicit DAGTypeLegalizer(SelectionDAG &dag)
124 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
125 ValueTypeActions(TLI.getValueTypeActions()) {
126 assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE &&
127 "Too many value types for ValueTypeActions to hold!");
130 /// run - This is the main entry point for the type legalizer. This does a
131 /// top-down traversal of the dag, legalizing types as it goes. Returns
132 /// "true" if it made any changes.
135 void NoteDeletion(SDNode *Old, SDNode *New) {
138 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
139 ReplacedValues[SDValue(Old, i)] = SDValue(New, i);
142 SelectionDAG &getDAG() const { return DAG; }
145 SDNode *AnalyzeNewNode(SDNode *N);
146 void AnalyzeNewValue(SDValue &Val);
147 void ExpungeNode(SDNode *N);
148 void PerformExpensiveChecks();
149 void RemapValue(SDValue &N);
152 SDValue BitConvertToInteger(SDValue Op);
153 SDValue BitConvertVectorToIntegerVector(SDValue Op);
154 SDValue CreateStackStoreLoad(SDValue Op, EVT DestVT);
155 bool CustomLowerNode(SDNode *N, EVT VT, bool LegalizeResult);
156 bool CustomWidenLowerNode(SDNode *N, EVT VT);
158 /// DisintegrateMERGE_VALUES - Replace each result of the given MERGE_VALUES
159 /// node with the corresponding input operand, except for the result 'ResNo',
160 /// for which the corresponding input operand is returned.
161 SDValue DisintegrateMERGE_VALUES(SDNode *N, unsigned ResNo);
163 SDValue GetVectorElementPointer(SDValue VecPtr, EVT EltVT, SDValue Index);
164 SDValue JoinIntegers(SDValue Lo, SDValue Hi);
165 SDValue LibCallify(RTLIB::Libcall LC, SDNode *N, bool isSigned);
167 std::pair<SDValue, SDValue> ExpandChainLibCall(RTLIB::Libcall LC,
168 SDNode *Node, bool isSigned);
169 std::pair<SDValue, SDValue> ExpandAtomic(SDNode *Node);
171 SDValue PromoteTargetBoolean(SDValue Bool, EVT VT);
172 void ReplaceValueWith(SDValue From, SDValue To);
173 void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
174 void SplitInteger(SDValue Op, EVT LoVT, EVT HiVT,
175 SDValue &Lo, SDValue &Hi);
177 //===--------------------------------------------------------------------===//
178 // Integer Promotion Support: LegalizeIntegerTypes.cpp
179 //===--------------------------------------------------------------------===//
181 /// GetPromotedInteger - Given a processed operand Op which was promoted to a
182 /// larger integer type, this returns the promoted value. The low bits of the
183 /// promoted value corresponding to the original type are exactly equal to Op.
184 /// The extra bits contain rubbish, so the promoted value may need to be zero-
185 /// or sign-extended from the original type before it is usable (the helpers
186 /// SExtPromotedInteger and ZExtPromotedInteger can do this for you).
187 /// For example, if Op is an i16 and was promoted to an i32, then this method
188 /// returns an i32, the lower 16 bits of which coincide with Op, and the upper
189 /// 16 bits of which contain rubbish.
190 SDValue GetPromotedInteger(SDValue Op) {
191 SDValue &PromotedOp = PromotedIntegers[Op];
192 RemapValue(PromotedOp);
193 assert(PromotedOp.getNode() && "Operand wasn't promoted?");
196 void SetPromotedInteger(SDValue Op, SDValue Result);
198 /// SExtPromotedInteger - Get a promoted operand and sign extend it to the
200 SDValue SExtPromotedInteger(SDValue Op) {
201 EVT OldVT = Op.getValueType();
203 Op = GetPromotedInteger(Op);
204 return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Op.getValueType(), Op,
205 DAG.getValueType(OldVT));
208 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
210 SDValue ZExtPromotedInteger(SDValue Op) {
211 EVT OldVT = Op.getValueType();
213 Op = GetPromotedInteger(Op);
214 return DAG.getZeroExtendInReg(Op, dl, OldVT.getScalarType());
217 // Integer Result Promotion.
218 void PromoteIntegerResult(SDNode *N, unsigned ResNo);
219 SDValue PromoteIntRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
220 SDValue PromoteIntRes_AssertSext(SDNode *N);
221 SDValue PromoteIntRes_AssertZext(SDNode *N);
222 SDValue PromoteIntRes_Atomic0(AtomicSDNode *N);
223 SDValue PromoteIntRes_Atomic1(AtomicSDNode *N);
224 SDValue PromoteIntRes_Atomic2(AtomicSDNode *N);
225 SDValue PromoteIntRes_EXTRACT_SUBVECTOR(SDNode *N);
226 SDValue PromoteIntRes_VECTOR_SHUFFLE(SDNode *N);
227 SDValue PromoteIntRes_BUILD_VECTOR(SDNode *N);
228 SDValue PromoteIntRes_SCALAR_TO_VECTOR(SDNode *N);
229 SDValue PromoteIntRes_INSERT_VECTOR_ELT(SDNode *N);
230 SDValue PromoteIntRes_CONCAT_VECTORS(SDNode *N);
231 SDValue PromoteIntRes_BITCAST(SDNode *N);
232 SDValue PromoteIntRes_BSWAP(SDNode *N);
233 SDValue PromoteIntRes_BUILD_PAIR(SDNode *N);
234 SDValue PromoteIntRes_Constant(SDNode *N);
235 SDValue PromoteIntRes_CONVERT_RNDSAT(SDNode *N);
236 SDValue PromoteIntRes_CTLZ(SDNode *N);
237 SDValue PromoteIntRes_CTPOP(SDNode *N);
238 SDValue PromoteIntRes_CTTZ(SDNode *N);
239 SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
240 SDValue PromoteIntRes_FP_TO_XINT(SDNode *N);
241 SDValue PromoteIntRes_FP32_TO_FP16(SDNode *N);
242 SDValue PromoteIntRes_INT_EXTEND(SDNode *N);
243 SDValue PromoteIntRes_LOAD(LoadSDNode *N);
244 SDValue PromoteIntRes_Overflow(SDNode *N);
245 SDValue PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo);
246 SDValue PromoteIntRes_SDIV(SDNode *N);
247 SDValue PromoteIntRes_SELECT(SDNode *N);
248 SDValue PromoteIntRes_VSELECT(SDNode *N);
249 SDValue PromoteIntRes_SELECT_CC(SDNode *N);
250 SDValue PromoteIntRes_SETCC(SDNode *N);
251 SDValue PromoteIntRes_SHL(SDNode *N);
252 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
253 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
254 SDValue PromoteIntRes_SRA(SDNode *N);
255 SDValue PromoteIntRes_SRL(SDNode *N);
256 SDValue PromoteIntRes_TRUNCATE(SDNode *N);
257 SDValue PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo);
258 SDValue PromoteIntRes_UDIV(SDNode *N);
259 SDValue PromoteIntRes_UNDEF(SDNode *N);
260 SDValue PromoteIntRes_VAARG(SDNode *N);
261 SDValue PromoteIntRes_XMULO(SDNode *N, unsigned ResNo);
263 // Integer Operand Promotion.
264 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
265 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
266 SDValue PromoteIntOp_ATOMIC_STORE(AtomicSDNode *N);
267 SDValue PromoteIntOp_BITCAST(SDNode *N);
268 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
269 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
270 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
271 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
272 SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N);
273 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
274 SDValue PromoteIntOp_EXTRACT_ELEMENT(SDNode *N);
275 SDValue PromoteIntOp_EXTRACT_VECTOR_ELT(SDNode *N);
276 SDValue PromoteIntOp_CONCAT_VECTORS(SDNode *N);
277 SDValue PromoteIntOp_SCALAR_TO_VECTOR(SDNode *N);
278 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
279 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
280 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
281 SDValue PromoteIntOp_VSETCC(SDNode *N, unsigned OpNo);
282 SDValue PromoteIntOp_Shift(SDNode *N);
283 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
284 SDValue PromoteIntOp_SINT_TO_FP(SDNode *N);
285 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
286 SDValue PromoteIntOp_TRUNCATE(SDNode *N);
287 SDValue PromoteIntOp_UINT_TO_FP(SDNode *N);
288 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
290 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
292 //===--------------------------------------------------------------------===//
293 // Integer Expansion Support: LegalizeIntegerTypes.cpp
294 //===--------------------------------------------------------------------===//
296 /// GetExpandedInteger - Given a processed operand Op which was expanded into
297 /// two integers of half the size, this returns the two halves. The low bits
298 /// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi.
299 /// For example, if Op is an i64 which was expanded into two i32's, then this
300 /// method returns the two i32's, with Lo being equal to the lower 32 bits of
301 /// Op, and Hi being equal to the upper 32 bits.
302 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
303 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
305 // Integer Result Expansion.
306 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
307 void ExpandIntRes_MERGE_VALUES (SDNode *N, unsigned ResNo,
308 SDValue &Lo, SDValue &Hi);
309 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
310 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
311 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
312 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
313 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
314 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
315 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
316 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
317 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
318 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
319 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
320 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
321 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
322 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
324 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
325 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
326 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
327 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
328 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
329 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
330 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
331 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
332 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
333 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
334 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
336 void ExpandIntRes_SADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi);
337 void ExpandIntRes_UADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi);
338 void ExpandIntRes_XMULO (SDNode *N, SDValue &Lo, SDValue &Hi);
340 void ExpandIntRes_ATOMIC_LOAD (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);
345 bool ExpandShiftWithUnknownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
347 // Integer Operand Expansion.
348 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
349 SDValue ExpandIntOp_BITCAST(SDNode *N);
350 SDValue ExpandIntOp_BR_CC(SDNode *N);
351 SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N);
352 SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
353 SDValue ExpandIntOp_SELECT_CC(SDNode *N);
354 SDValue ExpandIntOp_SETCC(SDNode *N);
355 SDValue ExpandIntOp_Shift(SDNode *N);
356 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
357 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
358 SDValue ExpandIntOp_TRUNCATE(SDNode *N);
359 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
360 SDValue ExpandIntOp_RETURNADDR(SDNode *N);
361 SDValue ExpandIntOp_ATOMIC_STORE(SDNode *N);
363 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
364 ISD::CondCode &CCCode, SDLoc dl);
366 //===--------------------------------------------------------------------===//
367 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
368 //===--------------------------------------------------------------------===//
370 /// GetSoftenedFloat - Given a processed operand Op which was converted to an
371 /// integer of the same size, this returns the integer. The integer contains
372 /// exactly the same bits as Op - only the type changed. For example, if Op
373 /// is an f32 which was softened to an i32, then this method returns an i32,
374 /// the bits of which coincide with those of Op.
375 SDValue GetSoftenedFloat(SDValue Op) {
376 SDValue &SoftenedOp = SoftenedFloats[Op];
377 RemapValue(SoftenedOp);
378 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
381 void SetSoftenedFloat(SDValue Op, SDValue Result);
383 // Result Float to Integer Conversion.
384 void SoftenFloatResult(SDNode *N, unsigned OpNo);
385 SDValue SoftenFloatRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
386 SDValue SoftenFloatRes_BITCAST(SDNode *N);
387 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
388 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
389 SDValue SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N);
390 SDValue SoftenFloatRes_FABS(SDNode *N);
391 SDValue SoftenFloatRes_FADD(SDNode *N);
392 SDValue SoftenFloatRes_FCEIL(SDNode *N);
393 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
394 SDValue SoftenFloatRes_FCOS(SDNode *N);
395 SDValue SoftenFloatRes_FDIV(SDNode *N);
396 SDValue SoftenFloatRes_FEXP(SDNode *N);
397 SDValue SoftenFloatRes_FEXP2(SDNode *N);
398 SDValue SoftenFloatRes_FFLOOR(SDNode *N);
399 SDValue SoftenFloatRes_FLOG(SDNode *N);
400 SDValue SoftenFloatRes_FLOG2(SDNode *N);
401 SDValue SoftenFloatRes_FLOG10(SDNode *N);
402 SDValue SoftenFloatRes_FMA(SDNode *N);
403 SDValue SoftenFloatRes_FMUL(SDNode *N);
404 SDValue SoftenFloatRes_FNEARBYINT(SDNode *N);
405 SDValue SoftenFloatRes_FNEG(SDNode *N);
406 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
407 SDValue SoftenFloatRes_FP16_TO_FP32(SDNode *N);
408 SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
409 SDValue SoftenFloatRes_FPOW(SDNode *N);
410 SDValue SoftenFloatRes_FPOWI(SDNode *N);
411 SDValue SoftenFloatRes_FREM(SDNode *N);
412 SDValue SoftenFloatRes_FRINT(SDNode *N);
413 SDValue SoftenFloatRes_FROUND(SDNode *N);
414 SDValue SoftenFloatRes_FSIN(SDNode *N);
415 SDValue SoftenFloatRes_FSQRT(SDNode *N);
416 SDValue SoftenFloatRes_FSUB(SDNode *N);
417 SDValue SoftenFloatRes_FTRUNC(SDNode *N);
418 SDValue SoftenFloatRes_LOAD(SDNode *N);
419 SDValue SoftenFloatRes_SELECT(SDNode *N);
420 SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
421 SDValue SoftenFloatRes_UNDEF(SDNode *N);
422 SDValue SoftenFloatRes_VAARG(SDNode *N);
423 SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
425 // Operand Float to Integer Conversion.
426 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
427 SDValue SoftenFloatOp_BITCAST(SDNode *N);
428 SDValue SoftenFloatOp_BR_CC(SDNode *N);
429 SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
430 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
431 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
432 SDValue SoftenFloatOp_FP32_TO_FP16(SDNode *N);
433 SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
434 SDValue SoftenFloatOp_SETCC(SDNode *N);
435 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
437 //===--------------------------------------------------------------------===//
438 // Float Expansion Support: LegalizeFloatTypes.cpp
439 //===--------------------------------------------------------------------===//
441 /// GetExpandedFloat - Given a processed operand Op which was expanded into
442 /// two floating point values of half the size, this returns the two halves.
443 /// The low bits of Op are exactly equal to the bits of Lo; the high bits
444 /// exactly equal Hi. For example, if Op is a ppcf128 which was expanded
445 /// into two f64's, then this method returns the two f64's, with Lo being
446 /// equal to the lower 64 bits of Op, and Hi to the upper 64 bits.
447 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
448 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
450 // Float Result Expansion.
451 void ExpandFloatResult(SDNode *N, unsigned ResNo);
452 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
453 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
454 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
455 void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi);
456 void ExpandFloatRes_FCOPYSIGN (SDNode *N, SDValue &Lo, SDValue &Hi);
457 void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi);
458 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
459 void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi);
460 void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi);
461 void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi);
462 void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi);
463 void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi);
464 void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi);
465 void ExpandFloatRes_FMA (SDNode *N, SDValue &Lo, SDValue &Hi);
466 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
467 void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi);
468 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
469 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
470 void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi);
471 void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi);
472 void ExpandFloatRes_FREM (SDNode *N, SDValue &Lo, SDValue &Hi);
473 void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi);
474 void ExpandFloatRes_FROUND (SDNode *N, SDValue &Lo, SDValue &Hi);
475 void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi);
476 void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi);
477 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
478 void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi);
479 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
480 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
482 // Float Operand Expansion.
483 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
484 SDValue ExpandFloatOp_BR_CC(SDNode *N);
485 SDValue ExpandFloatOp_FCOPYSIGN(SDNode *N);
486 SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
487 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
488 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
489 SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
490 SDValue ExpandFloatOp_SETCC(SDNode *N);
491 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
493 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
494 ISD::CondCode &CCCode, SDLoc dl);
496 //===--------------------------------------------------------------------===//
497 // Scalarization Support: LegalizeVectorTypes.cpp
498 //===--------------------------------------------------------------------===//
500 /// GetScalarizedVector - Given a processed one-element vector Op which was
501 /// scalarized to its element type, this returns the element. For example,
502 /// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32.
503 SDValue GetScalarizedVector(SDValue Op) {
504 SDValue &ScalarizedOp = ScalarizedVectors[Op];
505 RemapValue(ScalarizedOp);
506 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
509 void SetScalarizedVector(SDValue Op, SDValue Result);
511 // Vector Result Scalarization: <1 x ty> -> ty.
512 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
513 SDValue ScalarizeVecRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
514 SDValue ScalarizeVecRes_BinOp(SDNode *N);
515 SDValue ScalarizeVecRes_TernaryOp(SDNode *N);
516 SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
517 SDValue ScalarizeVecRes_InregOp(SDNode *N);
519 SDValue ScalarizeVecRes_BITCAST(SDNode *N);
520 SDValue ScalarizeVecRes_BUILD_VECTOR(SDNode *N);
521 SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N);
522 SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N);
523 SDValue ScalarizeVecRes_FP_ROUND(SDNode *N);
524 SDValue ScalarizeVecRes_FPOWI(SDNode *N);
525 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
526 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
527 SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N);
528 SDValue ScalarizeVecRes_SIGN_EXTEND_INREG(SDNode *N);
529 SDValue ScalarizeVecRes_VSELECT(SDNode *N);
530 SDValue ScalarizeVecRes_SELECT(SDNode *N);
531 SDValue ScalarizeVecRes_SELECT_CC(SDNode *N);
532 SDValue ScalarizeVecRes_SETCC(SDNode *N);
533 SDValue ScalarizeVecRes_UNDEF(SDNode *N);
534 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
535 SDValue ScalarizeVecRes_VSETCC(SDNode *N);
537 // Vector Operand Scalarization: <1 x ty> -> ty.
538 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
539 SDValue ScalarizeVecOp_BITCAST(SDNode *N);
540 SDValue ScalarizeVecOp_UnaryOp(SDNode *N);
541 SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
542 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
543 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
545 //===--------------------------------------------------------------------===//
546 // Vector Splitting Support: LegalizeVectorTypes.cpp
547 //===--------------------------------------------------------------------===//
549 /// GetSplitVector - Given a processed vector Op which was split into vectors
550 /// of half the size, this method returns the halves. The first elements of
551 /// Op coincide with the elements of Lo; the remaining elements of Op coincide
552 /// with the elements of Hi: Op is what you would get by concatenating Lo and
553 /// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then
554 /// this method returns the two v4i32's, with Lo corresponding to the first 4
555 /// elements of Op, and Hi to the last 4 elements.
556 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
557 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
559 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
560 void SplitVectorResult(SDNode *N, unsigned OpNo);
561 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
562 void SplitVecRes_TernaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
563 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
564 void SplitVecRes_InregOp(SDNode *N, SDValue &Lo, SDValue &Hi);
566 void SplitVecRes_BITCAST(SDNode *N, SDValue &Lo, SDValue &Hi);
567 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
568 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
569 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
570 void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
571 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
572 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
573 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
574 void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
575 void SplitVecRes_SIGN_EXTEND_INREG(SDNode *N, SDValue &Lo, SDValue &Hi);
576 void SplitVecRes_SETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
577 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
578 void SplitVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N, SDValue &Lo,
581 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
582 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
583 SDValue SplitVecOp_VSELECT(SDNode *N, unsigned OpNo);
584 SDValue SplitVecOp_UnaryOp(SDNode *N);
586 SDValue SplitVecOp_BITCAST(SDNode *N);
587 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
588 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
589 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
590 SDValue SplitVecOp_CONCAT_VECTORS(SDNode *N);
591 SDValue SplitVecOp_TRUNCATE(SDNode *N);
592 SDValue SplitVecOp_VSETCC(SDNode *N);
593 SDValue SplitVecOp_FP_ROUND(SDNode *N);
595 //===--------------------------------------------------------------------===//
596 // Vector Widening Support: LegalizeVectorTypes.cpp
597 //===--------------------------------------------------------------------===//
599 /// GetWidenedVector - Given a processed vector Op which was widened into a
600 /// larger vector, this method returns the larger vector. The elements of
601 /// the returned vector consist of the elements of Op followed by elements
602 /// containing rubbish. For example, if Op is a v2i32 that was widened to a
603 /// v4i32, then this method returns a v4i32 for which the first two elements
604 /// are the same as those of Op, while the last two elements contain rubbish.
605 SDValue GetWidenedVector(SDValue Op) {
606 SDValue &WidenedOp = WidenedVectors[Op];
607 RemapValue(WidenedOp);
608 assert(WidenedOp.getNode() && "Operand wasn't widened?");
611 void SetWidenedVector(SDValue Op, SDValue Result);
613 // Widen Vector Result Promotion.
614 void WidenVectorResult(SDNode *N, unsigned ResNo);
615 SDValue WidenVecRes_MERGE_VALUES(SDNode* N, unsigned ResNo);
616 SDValue WidenVecRes_BITCAST(SDNode* N);
617 SDValue WidenVecRes_BUILD_VECTOR(SDNode* N);
618 SDValue WidenVecRes_CONCAT_VECTORS(SDNode* N);
619 SDValue WidenVecRes_CONVERT_RNDSAT(SDNode* N);
620 SDValue WidenVecRes_EXTRACT_SUBVECTOR(SDNode* N);
621 SDValue WidenVecRes_INSERT_VECTOR_ELT(SDNode* N);
622 SDValue WidenVecRes_LOAD(SDNode* N);
623 SDValue WidenVecRes_SCALAR_TO_VECTOR(SDNode* N);
624 SDValue WidenVecRes_SIGN_EXTEND_INREG(SDNode* N);
625 SDValue WidenVecRes_SELECT(SDNode* N);
626 SDValue WidenVecRes_SELECT_CC(SDNode* N);
627 SDValue WidenVecRes_SETCC(SDNode* N);
628 SDValue WidenVecRes_UNDEF(SDNode *N);
629 SDValue WidenVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N);
630 SDValue WidenVecRes_VSETCC(SDNode* N);
632 SDValue WidenVecRes_Ternary(SDNode *N);
633 SDValue WidenVecRes_Binary(SDNode *N);
634 SDValue WidenVecRes_BinaryCanTrap(SDNode *N);
635 SDValue WidenVecRes_Convert(SDNode *N);
636 SDValue WidenVecRes_POWI(SDNode *N);
637 SDValue WidenVecRes_Shift(SDNode *N);
638 SDValue WidenVecRes_Unary(SDNode *N);
639 SDValue WidenVecRes_InregOp(SDNode *N);
641 // Widen Vector Operand.
642 bool WidenVectorOperand(SDNode *N, unsigned OpNo);
643 SDValue WidenVecOp_BITCAST(SDNode *N);
644 SDValue WidenVecOp_CONCAT_VECTORS(SDNode *N);
645 SDValue WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
646 SDValue WidenVecOp_EXTRACT_SUBVECTOR(SDNode *N);
647 SDValue WidenVecOp_STORE(SDNode* N);
648 SDValue WidenVecOp_SETCC(SDNode* N);
650 SDValue WidenVecOp_Convert(SDNode *N);
652 //===--------------------------------------------------------------------===//
653 // Vector Widening Utilities Support: LegalizeVectorTypes.cpp
654 //===--------------------------------------------------------------------===//
656 /// Helper GenWidenVectorLoads - Helper function to generate a set of
657 /// loads to load a vector with a resulting wider type. It takes
658 /// LdChain: list of chains for the load to be generated.
659 /// Ld: load to widen
660 SDValue GenWidenVectorLoads(SmallVectorImpl<SDValue> &LdChain,
663 /// GenWidenVectorExtLoads - Helper function to generate a set of extension
664 /// loads to load a ector with a resulting wider type. It takes
665 /// LdChain: list of chains for the load to be generated.
666 /// Ld: load to widen
667 /// ExtType: extension element type
668 SDValue GenWidenVectorExtLoads(SmallVectorImpl<SDValue> &LdChain,
669 LoadSDNode *LD, ISD::LoadExtType ExtType);
671 /// Helper genWidenVectorStores - Helper function to generate a set of
672 /// stores to store a widen vector into non widen memory
673 /// StChain: list of chains for the stores we have generated
674 /// ST: store of a widen value
675 void GenWidenVectorStores(SmallVectorImpl<SDValue> &StChain, StoreSDNode *ST);
677 /// Helper genWidenVectorTruncStores - Helper function to generate a set of
678 /// stores to store a truncate widen vector into non widen memory
679 /// StChain: list of chains for the stores we have generated
680 /// ST: store of a widen value
681 void GenWidenVectorTruncStores(SmallVectorImpl<SDValue> &StChain,
684 /// Modifies a vector input (widen or narrows) to a vector of NVT. The
685 /// input vector must have the same element type as NVT.
686 SDValue ModifyToType(SDValue InOp, EVT WidenVT);
689 //===--------------------------------------------------------------------===//
690 // Generic Splitting: LegalizeTypesGeneric.cpp
691 //===--------------------------------------------------------------------===//
693 // Legalization methods which only use that the illegal type is split into two
694 // not necessarily identical types. As such they can be used for splitting
695 // vectors and expanding integers and floats.
697 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
698 if (Op.getValueType().isVector())
699 GetSplitVector(Op, Lo, Hi);
700 else if (Op.getValueType().isInteger())
701 GetExpandedInteger(Op, Lo, Hi);
703 GetExpandedFloat(Op, Lo, Hi);
706 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
707 /// which is split (or expanded) into two not necessarily identical pieces.
708 void GetSplitDestVTs(EVT InVT, EVT &LoVT, EVT &HiVT);
710 /// GetPairElements - Use ISD::EXTRACT_ELEMENT nodes to extract the low and
711 /// high parts of the given value.
712 void GetPairElements(SDValue Pair, SDValue &Lo, SDValue &Hi);
714 // Generic Result Splitting.
715 void SplitRes_MERGE_VALUES(SDNode *N, unsigned ResNo,
716 SDValue &Lo, SDValue &Hi);
717 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
718 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
719 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
721 //===--------------------------------------------------------------------===//
722 // Generic Expansion: LegalizeTypesGeneric.cpp
723 //===--------------------------------------------------------------------===//
725 // Legalization methods which only use that the illegal type is split into two
726 // identical types of half the size, and that the Lo/Hi part is stored first
727 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
728 // such they can be used for expanding integers and floats.
730 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
731 if (Op.getValueType().isInteger())
732 GetExpandedInteger(Op, Lo, Hi);
734 GetExpandedFloat(Op, Lo, Hi);
737 // Generic Result Expansion.
738 void ExpandRes_MERGE_VALUES (SDNode *N, unsigned ResNo,
739 SDValue &Lo, SDValue &Hi);
740 void ExpandRes_BITCAST (SDNode *N, SDValue &Lo, SDValue &Hi);
741 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
742 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
743 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
744 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
745 void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
747 // Generic Operand Expansion.
748 SDValue ExpandOp_BITCAST (SDNode *N);
749 SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
750 SDValue ExpandOp_EXTRACT_ELEMENT (SDNode *N);
751 SDValue ExpandOp_INSERT_VECTOR_ELT(SDNode *N);
752 SDValue ExpandOp_SCALAR_TO_VECTOR (SDNode *N);
753 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
756 } // end namespace llvm.