1 //===-- HexagonISelDAGToDAG.cpp - A dag to dag inst selector for Hexagon --===//
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 an instruction selector for the Hexagon target.
12 //===----------------------------------------------------------------------===//
15 #include "HexagonISelLowering.h"
16 #include "HexagonTargetMachine.h"
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/CodeGen/SelectionDAGISel.h"
19 #include "llvm/IR/Intrinsics.h"
20 #include "llvm/Support/CommandLine.h"
21 #include "llvm/Support/Compiler.h"
22 #include "llvm/Support/Debug.h"
25 #define DEBUG_TYPE "hexagon-isel"
29 MaxNumOfUsesForConstExtenders("ga-max-num-uses-for-constant-extenders",
30 cl::Hidden, cl::init(2),
31 cl::desc("Maximum number of uses of a global address such that we still us a"
32 "constant extended instruction"));
34 //===----------------------------------------------------------------------===//
35 // Instruction Selector Implementation
36 //===----------------------------------------------------------------------===//
39 void initializeHexagonDAGToDAGISelPass(PassRegistry&);
42 //===--------------------------------------------------------------------===//
43 /// HexagonDAGToDAGISel - Hexagon specific code to select Hexagon machine
44 /// instructions for SelectionDAG operations.
47 class HexagonDAGToDAGISel : public SelectionDAGISel {
48 const HexagonTargetMachine& HTM;
49 const HexagonSubtarget &HST;
51 explicit HexagonDAGToDAGISel(HexagonTargetMachine &tm,
52 CodeGenOpt::Level OptLevel)
53 : SelectionDAGISel(tm, OptLevel), HTM(tm),
54 HST(tm.getSubtarget<HexagonSubtarget>()) {
55 initializeHexagonDAGToDAGISelPass(*PassRegistry::getPassRegistry());
58 SDNode *Select(SDNode *N) override;
60 // Complex Pattern Selectors.
61 inline bool SelectAddrGA(SDValue &N, SDValue &R);
62 inline bool SelectAddrGP(SDValue &N, SDValue &R);
63 bool SelectGlobalAddress(SDValue &N, SDValue &R, bool UseGP);
64 bool SelectAddrFI(SDValue &N, SDValue &R);
66 const char *getPassName() const override {
67 return "Hexagon DAG->DAG Pattern Instruction Selection";
70 SDNode *SelectFrameIndex(SDNode *N);
71 /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
72 /// inline asm expressions.
73 bool SelectInlineAsmMemoryOperand(const SDValue &Op,
74 unsigned ConstraintID,
75 std::vector<SDValue> &OutOps) override;
76 SDNode *SelectLoad(SDNode *N);
77 SDNode *SelectBaseOffsetLoad(LoadSDNode *LD, SDLoc dl);
78 SDNode *SelectIndexedLoad(LoadSDNode *LD, SDLoc dl);
79 SDNode *SelectIndexedLoadZeroExtend64(LoadSDNode *LD, unsigned Opcode,
81 SDNode *SelectIndexedLoadSignExtend64(LoadSDNode *LD, unsigned Opcode,
83 SDNode *SelectBaseOffsetStore(StoreSDNode *ST, SDLoc dl);
84 SDNode *SelectIndexedStore(StoreSDNode *ST, SDLoc dl);
85 SDNode *SelectStore(SDNode *N);
86 SDNode *SelectSHL(SDNode *N);
87 SDNode *SelectSelect(SDNode *N);
88 SDNode *SelectTruncate(SDNode *N);
89 SDNode *SelectMul(SDNode *N);
90 SDNode *SelectZeroExtend(SDNode *N);
91 SDNode *SelectIntrinsicWOChain(SDNode *N);
92 SDNode *SelectIntrinsicWChain(SDNode *N);
93 SDNode *SelectConstant(SDNode *N);
94 SDNode *SelectConstantFP(SDNode *N);
95 SDNode *SelectAdd(SDNode *N);
97 // XformMskToBitPosU5Imm - Returns the bit position which
98 // the single bit 32 bit mask represents.
99 // Used in Clr and Set bit immediate memops.
100 SDValue XformMskToBitPosU5Imm(uint32_t Imm) {
102 bitPos = Log2_32(Imm);
103 assert(bitPos >= 0 && bitPos < 32 &&
104 "Constant out of range for 32 BitPos Memops");
105 return CurDAG->getTargetConstant(bitPos, MVT::i32);
108 // XformMskToBitPosU4Imm - Returns the bit position which the single-bit
109 // 16 bit mask represents. Used in Clr and Set bit immediate memops.
110 SDValue XformMskToBitPosU4Imm(uint16_t Imm) {
111 return XformMskToBitPosU5Imm(Imm);
114 // XformMskToBitPosU3Imm - Returns the bit position which the single-bit
115 // 8 bit mask represents. Used in Clr and Set bit immediate memops.
116 SDValue XformMskToBitPosU3Imm(uint8_t Imm) {
117 return XformMskToBitPosU5Imm(Imm);
120 // Return true if there is exactly one bit set in V, i.e., if V is one of the
121 // following integers: 2^0, 2^1, ..., 2^31.
122 bool ImmIsSingleBit(uint32_t v) const {
123 return isPowerOf2_32(v);
126 // XformM5ToU5Imm - Return a target constant with the specified value, of
127 // type i32 where the negative literal is transformed into a positive literal
128 // for use in -= memops.
129 inline SDValue XformM5ToU5Imm(signed Imm) {
130 assert( (Imm >= -31 && Imm <= -1) && "Constant out of range for Memops");
131 return CurDAG->getTargetConstant( - Imm, MVT::i32);
134 // XformU7ToU7M1Imm - Return a target constant decremented by 1, in range
135 // [1..128], used in cmpb.gtu instructions.
136 inline SDValue XformU7ToU7M1Imm(signed Imm) {
137 assert((Imm >= 1 && Imm <= 128) && "Constant out of range for cmpb op");
138 return CurDAG->getTargetConstant(Imm - 1, MVT::i8);
141 // XformS8ToS8M1Imm - Return a target constant decremented by 1.
142 inline SDValue XformSToSM1Imm(signed Imm) {
143 return CurDAG->getTargetConstant(Imm - 1, MVT::i32);
146 // XformU8ToU8M1Imm - Return a target constant decremented by 1.
147 inline SDValue XformUToUM1Imm(unsigned Imm) {
148 assert((Imm >= 1) && "Cannot decrement unsigned int less than 1");
149 return CurDAG->getTargetConstant(Imm - 1, MVT::i32);
152 // XformSToSM2Imm - Return a target constant decremented by 2.
153 inline SDValue XformSToSM2Imm(unsigned Imm) {
154 return CurDAG->getTargetConstant(Imm - 2, MVT::i32);
157 // XformSToSM3Imm - Return a target constant decremented by 3.
158 inline SDValue XformSToSM3Imm(unsigned Imm) {
159 return CurDAG->getTargetConstant(Imm - 3, MVT::i32);
162 // Include the pieces autogenerated from the target description.
163 #include "HexagonGenDAGISel.inc"
166 bool isValueExtension(const SDValue &Val, unsigned FromBits, SDValue &Src);
167 }; // end HexagonDAGToDAGISel
168 } // end anonymous namespace
171 /// createHexagonISelDag - This pass converts a legalized DAG into a
172 /// Hexagon-specific DAG, ready for instruction scheduling.
175 FunctionPass *createHexagonISelDag(HexagonTargetMachine &TM,
176 CodeGenOpt::Level OptLevel) {
177 return new HexagonDAGToDAGISel(TM, OptLevel);
181 static void initializePassOnce(PassRegistry &Registry) {
182 const char *Name = "Hexagon DAG->DAG Pattern Instruction Selection";
183 PassInfo *PI = new PassInfo(Name, "hexagon-isel",
184 &SelectionDAGISel::ID, nullptr, false, false);
185 Registry.registerPass(*PI, true);
188 void llvm::initializeHexagonDAGToDAGISelPass(PassRegistry &Registry) {
189 CALL_ONCE_INITIALIZATION(initializePassOnce)
193 // Intrinsics that return a a predicate.
194 static unsigned doesIntrinsicReturnPredicate(unsigned ID)
199 case Intrinsic::hexagon_C2_cmpeq:
200 case Intrinsic::hexagon_C2_cmpgt:
201 case Intrinsic::hexagon_C2_cmpgtu:
202 case Intrinsic::hexagon_C2_cmpgtup:
203 case Intrinsic::hexagon_C2_cmpgtp:
204 case Intrinsic::hexagon_C2_cmpeqp:
205 case Intrinsic::hexagon_C2_bitsset:
206 case Intrinsic::hexagon_C2_bitsclr:
207 case Intrinsic::hexagon_C2_cmpeqi:
208 case Intrinsic::hexagon_C2_cmpgti:
209 case Intrinsic::hexagon_C2_cmpgtui:
210 case Intrinsic::hexagon_C2_cmpgei:
211 case Intrinsic::hexagon_C2_cmpgeui:
212 case Intrinsic::hexagon_C2_cmplt:
213 case Intrinsic::hexagon_C2_cmpltu:
214 case Intrinsic::hexagon_C2_bitsclri:
215 case Intrinsic::hexagon_C2_and:
216 case Intrinsic::hexagon_C2_or:
217 case Intrinsic::hexagon_C2_xor:
218 case Intrinsic::hexagon_C2_andn:
219 case Intrinsic::hexagon_C2_not:
220 case Intrinsic::hexagon_C2_orn:
221 case Intrinsic::hexagon_C2_pxfer_map:
222 case Intrinsic::hexagon_C2_any8:
223 case Intrinsic::hexagon_C2_all8:
224 case Intrinsic::hexagon_A2_vcmpbeq:
225 case Intrinsic::hexagon_A2_vcmpbgtu:
226 case Intrinsic::hexagon_A2_vcmpheq:
227 case Intrinsic::hexagon_A2_vcmphgt:
228 case Intrinsic::hexagon_A2_vcmphgtu:
229 case Intrinsic::hexagon_A2_vcmpweq:
230 case Intrinsic::hexagon_A2_vcmpwgt:
231 case Intrinsic::hexagon_A2_vcmpwgtu:
232 case Intrinsic::hexagon_C2_tfrrp:
233 case Intrinsic::hexagon_S2_tstbit_i:
234 case Intrinsic::hexagon_S2_tstbit_r:
239 SDNode *HexagonDAGToDAGISel::SelectIndexedLoadSignExtend64(LoadSDNode *LD,
242 SDValue Chain = LD->getChain();
243 EVT LoadedVT = LD->getMemoryVT();
244 SDValue Base = LD->getBasePtr();
245 SDValue Offset = LD->getOffset();
246 SDNode *OffsetNode = Offset.getNode();
247 int32_t Val = cast<ConstantSDNode>(OffsetNode)->getSExtValue();
249 const HexagonInstrInfo &TII = *HST.getInstrInfo();
250 if (TII.isValidAutoIncImm(LoadedVT, Val)) {
251 SDValue TargetConst = CurDAG->getTargetConstant(Val, MVT::i32);
252 SDNode *Result_1 = CurDAG->getMachineNode(Opcode, dl, MVT::i32, MVT::i32,
253 MVT::Other, Base, TargetConst,
255 SDNode *Result_2 = CurDAG->getMachineNode(Hexagon::A2_sxtw, dl, MVT::i64,
256 SDValue(Result_1, 0));
257 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
258 MemOp[0] = LD->getMemOperand();
259 cast<MachineSDNode>(Result_1)->setMemRefs(MemOp, MemOp + 1);
260 const SDValue Froms[] = { SDValue(LD, 0),
263 const SDValue Tos[] = { SDValue(Result_2, 0),
264 SDValue(Result_1, 1),
265 SDValue(Result_1, 2) };
266 ReplaceUses(Froms, Tos, 3);
270 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
271 SDValue TargetConstVal = CurDAG->getTargetConstant(Val, MVT::i32);
272 SDNode *Result_1 = CurDAG->getMachineNode(Opcode, dl, MVT::i32, MVT::Other,
273 Base, TargetConst0, Chain);
274 SDNode *Result_2 = CurDAG->getMachineNode(Hexagon::A2_sxtw, dl, MVT::i64,
275 SDValue(Result_1, 0));
276 SDNode* Result_3 = CurDAG->getMachineNode(Hexagon::A2_addi, dl, MVT::i32,
277 Base, TargetConstVal,
278 SDValue(Result_1, 1));
279 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
280 MemOp[0] = LD->getMemOperand();
281 cast<MachineSDNode>(Result_1)->setMemRefs(MemOp, MemOp + 1);
282 const SDValue Froms[] = { SDValue(LD, 0),
285 const SDValue Tos[] = { SDValue(Result_2, 0),
286 SDValue(Result_3, 0),
287 SDValue(Result_1, 1) };
288 ReplaceUses(Froms, Tos, 3);
293 SDNode *HexagonDAGToDAGISel::SelectIndexedLoadZeroExtend64(LoadSDNode *LD,
296 SDValue Chain = LD->getChain();
297 EVT LoadedVT = LD->getMemoryVT();
298 SDValue Base = LD->getBasePtr();
299 SDValue Offset = LD->getOffset();
300 SDNode *OffsetNode = Offset.getNode();
301 int32_t Val = cast<ConstantSDNode>(OffsetNode)->getSExtValue();
303 const HexagonInstrInfo &TII = *HST.getInstrInfo();
304 if (TII.isValidAutoIncImm(LoadedVT, Val)) {
305 SDValue TargetConstVal = CurDAG->getTargetConstant(Val, MVT::i32);
306 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
307 SDNode *Result_1 = CurDAG->getMachineNode(Opcode, dl, MVT::i32,
308 MVT::i32, MVT::Other, Base,
309 TargetConstVal, Chain);
310 SDNode *Result_2 = CurDAG->getMachineNode(Hexagon::A4_combineir, dl,
311 MVT::i64, MVT::Other,
313 SDValue(Result_1,0));
314 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
315 MemOp[0] = LD->getMemOperand();
316 cast<MachineSDNode>(Result_1)->setMemRefs(MemOp, MemOp + 1);
317 const SDValue Froms[] = { SDValue(LD, 0),
320 const SDValue Tos[] = { SDValue(Result_2, 0),
321 SDValue(Result_1, 1),
322 SDValue(Result_1, 2) };
323 ReplaceUses(Froms, Tos, 3);
327 // Generate an indirect load.
328 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
329 SDValue TargetConstVal = CurDAG->getTargetConstant(Val, MVT::i32);
330 SDNode *Result_1 = CurDAG->getMachineNode(Opcode, dl, MVT::i32,
331 MVT::Other, Base, TargetConst0,
333 SDNode *Result_2 = CurDAG->getMachineNode(Hexagon::A4_combineir, dl,
334 MVT::i64, MVT::Other,
336 SDValue(Result_1,0));
337 // Add offset to base.
338 SDNode* Result_3 = CurDAG->getMachineNode(Hexagon::A2_addi, dl, MVT::i32,
339 Base, TargetConstVal,
340 SDValue(Result_1, 1));
341 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
342 MemOp[0] = LD->getMemOperand();
343 cast<MachineSDNode>(Result_1)->setMemRefs(MemOp, MemOp + 1);
344 const SDValue Froms[] = { SDValue(LD, 0),
347 const SDValue Tos[] = { SDValue(Result_2, 0), // Load value.
348 SDValue(Result_3, 0), // New address.
349 SDValue(Result_1, 1) };
350 ReplaceUses(Froms, Tos, 3);
355 SDNode *HexagonDAGToDAGISel::SelectIndexedLoad(LoadSDNode *LD, SDLoc dl) {
356 SDValue Chain = LD->getChain();
357 SDValue Base = LD->getBasePtr();
358 SDValue Offset = LD->getOffset();
359 SDNode *OffsetNode = Offset.getNode();
360 // Get the constant value.
361 int32_t Val = cast<ConstantSDNode>(OffsetNode)->getSExtValue();
362 EVT LoadedVT = LD->getMemoryVT();
365 // Check for zero extended loads. Treat any-extend loads as zero extended
367 ISD::LoadExtType ExtType = LD->getExtensionType();
368 bool IsZeroExt = (ExtType == ISD::ZEXTLOAD || ExtType == ISD::EXTLOAD);
370 // Figure out the opcode.
371 const HexagonInstrInfo &TII = *HST.getInstrInfo();
372 if (LoadedVT == MVT::i64) {
373 if (TII.isValidAutoIncImm(LoadedVT, Val))
374 Opcode = Hexagon::L2_loadrd_pi;
376 Opcode = Hexagon::L2_loadrd_io;
377 } else if (LoadedVT == MVT::i32) {
378 if (TII.isValidAutoIncImm(LoadedVT, Val))
379 Opcode = Hexagon::L2_loadri_pi;
381 Opcode = Hexagon::L2_loadri_io;
382 } else if (LoadedVT == MVT::i16) {
383 if (TII.isValidAutoIncImm(LoadedVT, Val))
384 Opcode = IsZeroExt ? Hexagon::L2_loadruh_pi : Hexagon::L2_loadrh_pi;
386 Opcode = IsZeroExt ? Hexagon::L2_loadruh_io : Hexagon::L2_loadrh_io;
387 } else if (LoadedVT == MVT::i8) {
388 if (TII.isValidAutoIncImm(LoadedVT, Val))
389 Opcode = IsZeroExt ? Hexagon::L2_loadrub_pi : Hexagon::L2_loadrb_pi;
391 Opcode = IsZeroExt ? Hexagon::L2_loadrub_io : Hexagon::L2_loadrb_io;
393 llvm_unreachable("unknown memory type");
395 // For zero extended i64 loads, we need to add combine instructions.
396 if (LD->getValueType(0) == MVT::i64 && IsZeroExt)
397 return SelectIndexedLoadZeroExtend64(LD, Opcode, dl);
398 // Handle sign extended i64 loads.
399 if (LD->getValueType(0) == MVT::i64 && ExtType == ISD::SEXTLOAD)
400 return SelectIndexedLoadSignExtend64(LD, Opcode, dl);
402 if (TII.isValidAutoIncImm(LoadedVT, Val)) {
403 SDValue TargetConstVal = CurDAG->getTargetConstant(Val, MVT::i32);
404 SDNode* Result = CurDAG->getMachineNode(Opcode, dl,
406 MVT::i32, MVT::Other, Base,
407 TargetConstVal, Chain);
408 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
409 MemOp[0] = LD->getMemOperand();
410 cast<MachineSDNode>(Result)->setMemRefs(MemOp, MemOp + 1);
411 const SDValue Froms[] = { SDValue(LD, 0),
415 const SDValue Tos[] = { SDValue(Result, 0),
419 ReplaceUses(Froms, Tos, 3);
422 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
423 SDValue TargetConstVal = CurDAG->getTargetConstant(Val, MVT::i32);
424 SDNode* Result_1 = CurDAG->getMachineNode(Opcode, dl,
426 MVT::Other, Base, TargetConst0,
428 SDNode* Result_2 = CurDAG->getMachineNode(Hexagon::A2_addi, dl, MVT::i32,
429 Base, TargetConstVal,
430 SDValue(Result_1, 1));
431 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
432 MemOp[0] = LD->getMemOperand();
433 cast<MachineSDNode>(Result_1)->setMemRefs(MemOp, MemOp + 1);
434 const SDValue Froms[] = { SDValue(LD, 0),
438 const SDValue Tos[] = { SDValue(Result_1, 0),
439 SDValue(Result_2, 0),
442 ReplaceUses(Froms, Tos, 3);
448 SDNode *HexagonDAGToDAGISel::SelectLoad(SDNode *N) {
451 LoadSDNode *LD = cast<LoadSDNode>(N);
452 ISD::MemIndexedMode AM = LD->getAddressingMode();
454 // Handle indexed loads.
455 if (AM != ISD::UNINDEXED) {
456 result = SelectIndexedLoad(LD, dl);
458 result = SelectCode(LD);
465 SDNode *HexagonDAGToDAGISel::SelectIndexedStore(StoreSDNode *ST, SDLoc dl) {
466 SDValue Chain = ST->getChain();
467 SDValue Base = ST->getBasePtr();
468 SDValue Offset = ST->getOffset();
469 SDValue Value = ST->getValue();
470 SDNode *OffsetNode = Offset.getNode();
471 // Get the constant value.
472 int32_t Val = cast<ConstantSDNode>(OffsetNode)->getSExtValue();
473 EVT StoredVT = ST->getMemoryVT();
474 EVT ValueVT = Value.getValueType();
476 // Offset value must be within representable range
477 // and must have correct alignment properties.
478 const HexagonInstrInfo &TII = *HST.getInstrInfo();
479 if (TII.isValidAutoIncImm(StoredVT, Val)) {
482 // Figure out the post inc version of opcode.
483 if (StoredVT == MVT::i64) Opcode = Hexagon::S2_storerd_pi;
484 else if (StoredVT == MVT::i32) Opcode = Hexagon::S2_storeri_pi;
485 else if (StoredVT == MVT::i16) Opcode = Hexagon::S2_storerh_pi;
486 else if (StoredVT == MVT::i8) Opcode = Hexagon::S2_storerb_pi;
487 else llvm_unreachable("unknown memory type");
489 if (ST->isTruncatingStore() && ValueVT.getSizeInBits() == 64) {
490 assert(StoredVT.getSizeInBits() < 64 && "Not a truncating store");
491 Value = CurDAG->getTargetExtractSubreg(Hexagon::subreg_loreg,
492 dl, MVT::i32, Value);
494 SDValue Ops[] = {Base, CurDAG->getTargetConstant(Val, MVT::i32), Value,
496 // Build post increment store.
497 SDNode* Result = CurDAG->getMachineNode(Opcode, dl, MVT::i32,
499 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
500 MemOp[0] = ST->getMemOperand();
501 cast<MachineSDNode>(Result)->setMemRefs(MemOp, MemOp + 1);
503 ReplaceUses(ST, Result);
504 ReplaceUses(SDValue(ST,1), SDValue(Result,1));
508 // Note: Order of operands matches the def of instruction:
510 // : STInst<(outs), (ins IntRegs:$base, imm:$offset, DoubleRegs:$src1), ...
511 // and it differs for POST_ST* for instance.
512 SDValue Ops[] = { Base, CurDAG->getTargetConstant(0, MVT::i32), Value,
516 // Figure out the opcode.
517 if (StoredVT == MVT::i64) Opcode = Hexagon::S2_storerd_io;
518 else if (StoredVT == MVT::i32) Opcode = Hexagon::S2_storeri_io;
519 else if (StoredVT == MVT::i16) Opcode = Hexagon::S2_storerh_io;
520 else if (StoredVT == MVT::i8) Opcode = Hexagon::S2_storerb_io;
521 else llvm_unreachable("unknown memory type");
523 // Build regular store.
524 SDValue TargetConstVal = CurDAG->getTargetConstant(Val, MVT::i32);
525 SDNode* Result_1 = CurDAG->getMachineNode(Opcode, dl, MVT::Other, Ops);
526 // Build splitted incriment instruction.
527 SDNode* Result_2 = CurDAG->getMachineNode(Hexagon::A2_addi, dl, MVT::i32,
530 SDValue(Result_1, 0));
531 MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
532 MemOp[0] = ST->getMemOperand();
533 cast<MachineSDNode>(Result_1)->setMemRefs(MemOp, MemOp + 1);
535 ReplaceUses(SDValue(ST,0), SDValue(Result_2,0));
536 ReplaceUses(SDValue(ST,1), SDValue(Result_1,0));
540 SDNode *HexagonDAGToDAGISel::SelectStore(SDNode *N) {
542 StoreSDNode *ST = cast<StoreSDNode>(N);
543 ISD::MemIndexedMode AM = ST->getAddressingMode();
545 // Handle indexed stores.
546 if (AM != ISD::UNINDEXED) {
547 return SelectIndexedStore(ST, dl);
550 return SelectCode(ST);
553 SDNode *HexagonDAGToDAGISel::SelectMul(SDNode *N) {
557 // %conv.i = sext i32 %tmp1 to i64
558 // %conv2.i = sext i32 %add to i64
559 // %mul.i = mul nsw i64 %conv2.i, %conv.i
561 // --- match with the following ---
563 // %mul.i = mpy (%tmp1, %add)
566 if (N->getValueType(0) == MVT::i64) {
567 // Shifting a i64 signed multiply.
568 SDValue MulOp0 = N->getOperand(0);
569 SDValue MulOp1 = N->getOperand(1);
574 // Handle sign_extend and sextload.
575 if (MulOp0.getOpcode() == ISD::SIGN_EXTEND) {
576 SDValue Sext0 = MulOp0.getOperand(0);
577 if (Sext0.getNode()->getValueType(0) != MVT::i32) {
578 return SelectCode(N);
582 } else if (MulOp0.getOpcode() == ISD::LOAD) {
583 LoadSDNode *LD = cast<LoadSDNode>(MulOp0.getNode());
584 if (LD->getMemoryVT() != MVT::i32 ||
585 LD->getExtensionType() != ISD::SEXTLOAD ||
586 LD->getAddressingMode() != ISD::UNINDEXED) {
587 return SelectCode(N);
590 SDValue Chain = LD->getChain();
591 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
592 OP0 = SDValue(CurDAG->getMachineNode(Hexagon::L2_loadri_io, dl, MVT::i32,
594 LD->getBasePtr(), TargetConst0,
597 return SelectCode(N);
600 // Same goes for the second operand.
601 if (MulOp1.getOpcode() == ISD::SIGN_EXTEND) {
602 SDValue Sext1 = MulOp1.getOperand(0);
603 if (Sext1.getNode()->getValueType(0) != MVT::i32) {
604 return SelectCode(N);
608 } else if (MulOp1.getOpcode() == ISD::LOAD) {
609 LoadSDNode *LD = cast<LoadSDNode>(MulOp1.getNode());
610 if (LD->getMemoryVT() != MVT::i32 ||
611 LD->getExtensionType() != ISD::SEXTLOAD ||
612 LD->getAddressingMode() != ISD::UNINDEXED) {
613 return SelectCode(N);
616 SDValue Chain = LD->getChain();
617 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
618 OP1 = SDValue(CurDAG->getMachineNode(Hexagon::L2_loadri_io, dl, MVT::i32,
620 LD->getBasePtr(), TargetConst0,
623 return SelectCode(N);
626 // Generate a mpy instruction.
627 SDNode *Result = CurDAG->getMachineNode(Hexagon::M2_dpmpyss_s0, dl, MVT::i64,
629 ReplaceUses(N, Result);
633 return SelectCode(N);
637 SDNode *HexagonDAGToDAGISel::SelectSelect(SDNode *N) {
639 SDValue N0 = N->getOperand(0);
640 if (N0.getOpcode() == ISD::SETCC) {
641 SDValue N00 = N0.getOperand(0);
642 if (N00.getOpcode() == ISD::SIGN_EXTEND_INREG) {
643 SDValue N000 = N00.getOperand(0);
644 SDValue N001 = N00.getOperand(1);
645 if (cast<VTSDNode>(N001)->getVT() == MVT::i16) {
646 SDValue N01 = N0.getOperand(1);
647 SDValue N02 = N0.getOperand(2);
649 // Pattern: (select:i32 (setcc:i1 (sext_inreg:i32 IntRegs:i32:$src2,
650 // i16:Other),IntRegs:i32:$src1, SETLT:Other),IntRegs:i32:$src1,
651 // IntRegs:i32:$src2)
652 // Emits: (MAXh_rr:i32 IntRegs:i32:$src1, IntRegs:i32:$src2)
653 // Pattern complexity = 9 cost = 1 size = 0.
654 if (cast<CondCodeSDNode>(N02)->get() == ISD::SETLT) {
655 SDValue N1 = N->getOperand(1);
657 SDValue N2 = N->getOperand(2);
659 N0.getNode()->getValueType(N0.getResNo()) == MVT::i1 &&
660 N00.getNode()->getValueType(N00.getResNo()) == MVT::i32) {
661 SDNode *SextNode = CurDAG->getMachineNode(Hexagon::A2_sxth, dl,
663 SDNode *Result = CurDAG->getMachineNode(Hexagon::A2_max, dl,
665 SDValue(SextNode, 0),
667 ReplaceUses(N, Result);
673 // Pattern: (select:i32 (setcc:i1 (sext_inreg:i32 IntRegs:i32:$src2,
674 // i16:Other), IntRegs:i32:$src1, SETGT:Other), IntRegs:i32:$src1,
675 // IntRegs:i32:$src2)
676 // Emits: (MINh_rr:i32 IntRegs:i32:$src1, IntRegs:i32:$src2)
677 // Pattern complexity = 9 cost = 1 size = 0.
678 if (cast<CondCodeSDNode>(N02)->get() == ISD::SETGT) {
679 SDValue N1 = N->getOperand(1);
681 SDValue N2 = N->getOperand(2);
683 N0.getNode()->getValueType(N0.getResNo()) == MVT::i1 &&
684 N00.getNode()->getValueType(N00.getResNo()) == MVT::i32) {
685 SDNode *SextNode = CurDAG->getMachineNode(Hexagon::A2_sxth, dl,
687 SDNode *Result = CurDAG->getMachineNode(Hexagon::A2_min, dl,
689 SDValue(SextNode, 0),
691 ReplaceUses(N, Result);
700 return SelectCode(N);
704 SDNode *HexagonDAGToDAGISel::SelectTruncate(SDNode *N) {
706 SDValue Shift = N->getOperand(0);
709 // %conv.i = sext i32 %tmp1 to i64
710 // %conv2.i = sext i32 %add to i64
711 // %mul.i = mul nsw i64 %conv2.i, %conv.i
712 // %shr5.i = lshr i64 %mul.i, 32
713 // %conv3.i = trunc i64 %shr5.i to i32
715 // --- match with the following ---
717 // %conv3.i = mpy (%tmp1, %add)
720 if (N->getValueType(0) == MVT::i32) {
722 if (Shift.getNode()->getValueType(0) == MVT::i64) {
723 // Trunc child is logical shift right.
724 if (Shift.getOpcode() != ISD::SRL) {
725 return SelectCode(N);
728 SDValue ShiftOp0 = Shift.getOperand(0);
729 SDValue ShiftOp1 = Shift.getOperand(1);
732 if (ShiftOp1.getOpcode() != ISD::Constant) {
733 return SelectCode(N);
737 cast<ConstantSDNode>(ShiftOp1.getNode())->getSExtValue();
738 if (ShiftConst != 32) {
739 return SelectCode(N);
742 // Shifting a i64 signed multiply
743 SDValue Mul = ShiftOp0;
744 if (Mul.getOpcode() != ISD::MUL) {
745 return SelectCode(N);
748 SDValue MulOp0 = Mul.getOperand(0);
749 SDValue MulOp1 = Mul.getOperand(1);
754 // Handle sign_extend and sextload
755 if (MulOp0.getOpcode() == ISD::SIGN_EXTEND) {
756 SDValue Sext0 = MulOp0.getOperand(0);
757 if (Sext0.getNode()->getValueType(0) != MVT::i32) {
758 return SelectCode(N);
762 } else if (MulOp0.getOpcode() == ISD::LOAD) {
763 LoadSDNode *LD = cast<LoadSDNode>(MulOp0.getNode());
764 if (LD->getMemoryVT() != MVT::i32 ||
765 LD->getExtensionType() != ISD::SEXTLOAD ||
766 LD->getAddressingMode() != ISD::UNINDEXED) {
767 return SelectCode(N);
770 SDValue Chain = LD->getChain();
771 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
772 OP0 = SDValue(CurDAG->getMachineNode(Hexagon::L2_loadri_io, dl, MVT::i32,
775 TargetConst0, Chain), 0);
777 return SelectCode(N);
780 // Same goes for the second operand.
781 if (MulOp1.getOpcode() == ISD::SIGN_EXTEND) {
782 SDValue Sext1 = MulOp1.getOperand(0);
783 if (Sext1.getNode()->getValueType(0) != MVT::i32)
784 return SelectCode(N);
787 } else if (MulOp1.getOpcode() == ISD::LOAD) {
788 LoadSDNode *LD = cast<LoadSDNode>(MulOp1.getNode());
789 if (LD->getMemoryVT() != MVT::i32 ||
790 LD->getExtensionType() != ISD::SEXTLOAD ||
791 LD->getAddressingMode() != ISD::UNINDEXED) {
792 return SelectCode(N);
795 SDValue Chain = LD->getChain();
796 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
797 OP1 = SDValue(CurDAG->getMachineNode(Hexagon::L2_loadri_io, dl, MVT::i32,
800 TargetConst0, Chain), 0);
802 return SelectCode(N);
805 // Generate a mpy instruction.
806 SDNode *Result = CurDAG->getMachineNode(Hexagon::M2_mpy_up, dl, MVT::i32,
808 ReplaceUses(N, Result);
813 return SelectCode(N);
817 SDNode *HexagonDAGToDAGISel::SelectSHL(SDNode *N) {
819 if (N->getValueType(0) == MVT::i32) {
820 SDValue Shl_0 = N->getOperand(0);
821 SDValue Shl_1 = N->getOperand(1);
823 if (Shl_1.getOpcode() == ISD::Constant) {
824 if (Shl_0.getOpcode() == ISD::MUL) {
825 SDValue Mul_0 = Shl_0.getOperand(0); // Val
826 SDValue Mul_1 = Shl_0.getOperand(1); // Const
827 // RHS of mul is const.
828 if (Mul_1.getOpcode() == ISD::Constant) {
830 cast<ConstantSDNode>(Shl_1.getNode())->getSExtValue();
832 cast<ConstantSDNode>(Mul_1.getNode())->getSExtValue();
833 int32_t ValConst = MulConst << ShlConst;
834 SDValue Val = CurDAG->getTargetConstant(ValConst,
836 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Val.getNode()))
837 if (isInt<9>(CN->getSExtValue())) {
839 CurDAG->getMachineNode(Hexagon::M2_mpysmi, dl,
840 MVT::i32, Mul_0, Val);
841 ReplaceUses(N, Result);
846 } else if (Shl_0.getOpcode() == ISD::SUB) {
847 SDValue Sub_0 = Shl_0.getOperand(0); // Const 0
848 SDValue Sub_1 = Shl_0.getOperand(1); // Val
849 if (Sub_0.getOpcode() == ISD::Constant) {
851 cast<ConstantSDNode>(Sub_0.getNode())->getSExtValue();
853 if (Sub_1.getOpcode() == ISD::SHL) {
854 SDValue Shl2_0 = Sub_1.getOperand(0); // Val
855 SDValue Shl2_1 = Sub_1.getOperand(1); // Const
856 if (Shl2_1.getOpcode() == ISD::Constant) {
858 cast<ConstantSDNode>(Shl_1.getNode())->getSExtValue();
860 cast<ConstantSDNode>(Shl2_1.getNode())->getSExtValue();
861 int32_t ValConst = 1 << (ShlConst+Shl2Const);
862 SDValue Val = CurDAG->getTargetConstant(-ValConst, MVT::i32);
863 if (ConstantSDNode *CN =
864 dyn_cast<ConstantSDNode>(Val.getNode()))
865 if (isInt<9>(CN->getSExtValue())) {
867 CurDAG->getMachineNode(Hexagon::M2_mpysmi, dl, MVT::i32,
869 ReplaceUses(N, Result);
879 return SelectCode(N);
884 // If there is an zero_extend followed an intrinsic in DAG (this means - the
885 // result of the intrinsic is predicate); convert the zero_extend to
886 // transfer instruction.
888 // Zero extend -> transfer is lowered here. Otherwise, zero_extend will be
889 // converted into a MUX as predicate registers defined as 1 bit in the
890 // compiler. Architecture defines them as 8-bit registers.
891 // We want to preserve all the lower 8-bits and, not just 1 LSB bit.
893 SDNode *HexagonDAGToDAGISel::SelectZeroExtend(SDNode *N) {
895 SDNode *IsIntrinsic = N->getOperand(0).getNode();
896 if ((IsIntrinsic->getOpcode() == ISD::INTRINSIC_WO_CHAIN)) {
898 cast<ConstantSDNode>(IsIntrinsic->getOperand(0))->getZExtValue();
899 if (doesIntrinsicReturnPredicate(ID)) {
900 // Now we need to differentiate target data types.
901 if (N->getValueType(0) == MVT::i64) {
902 // Convert the zero_extend to Rs = Pd followed by COMBINE_rr(0,Rs).
903 SDValue TargetConst0 = CurDAG->getTargetConstant(0, MVT::i32);
904 SDNode *Result_1 = CurDAG->getMachineNode(Hexagon::C2_tfrpr, dl,
906 SDValue(IsIntrinsic, 0));
907 SDNode *Result_2 = CurDAG->getMachineNode(Hexagon::A2_tfrsi, dl,
910 SDNode *Result_3 = CurDAG->getMachineNode(Hexagon::A2_combinew, dl,
911 MVT::i64, MVT::Other,
912 SDValue(Result_2, 0),
913 SDValue(Result_1, 0));
914 ReplaceUses(N, Result_3);
917 if (N->getValueType(0) == MVT::i32) {
918 // Convert the zero_extend to Rs = Pd
919 SDNode* RsPd = CurDAG->getMachineNode(Hexagon::C2_tfrpr, dl,
921 SDValue(IsIntrinsic, 0));
922 ReplaceUses(N, RsPd);
925 llvm_unreachable("Unexpected value type");
928 return SelectCode(N);
932 // Checking for intrinsics which have predicate registers as operand(s)
933 // and lowering to the actual intrinsic.
935 SDNode *HexagonDAGToDAGISel::SelectIntrinsicWOChain(SDNode *N) {
936 unsigned IID = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
939 case Intrinsic::hexagon_S2_vsplatrb:
942 case Intrinsic::hexagon_S2_vsplatrh:
946 return SelectCode(N);
949 SDValue const &V = N->getOperand(1);
951 if (isValueExtension(V, Bits, U)) {
952 SDValue R = CurDAG->getNode(N->getOpcode(), SDLoc(N), N->getValueType(0),
953 N->getOperand(0), U);
954 return SelectCode(R.getNode());
956 return SelectCode(N);
960 // Map floating point constant values.
962 SDNode *HexagonDAGToDAGISel::SelectConstantFP(SDNode *N) {
964 ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N);
965 APFloat APF = CN->getValueAPF();
966 if (N->getValueType(0) == MVT::f32) {
967 return CurDAG->getMachineNode(Hexagon::TFRI_f, dl, MVT::f32,
968 CurDAG->getTargetConstantFP(APF.convertToFloat(), MVT::f32));
970 else if (N->getValueType(0) == MVT::f64) {
971 return CurDAG->getMachineNode(Hexagon::CONST64_Float_Real, dl, MVT::f64,
972 CurDAG->getTargetConstantFP(APF.convertToDouble(), MVT::f64));
975 return SelectCode(N);
979 // Map predicate true (encoded as -1 in LLVM) to a XOR.
981 SDNode *HexagonDAGToDAGISel::SelectConstant(SDNode *N) {
983 if (N->getValueType(0) == MVT::i1) {
985 int32_t Val = cast<ConstantSDNode>(N)->getSExtValue();
987 // Create the IntReg = 1 node.
989 CurDAG->getMachineNode(Hexagon::A2_tfrsi, dl, MVT::i32,
990 CurDAG->getTargetConstant(0, MVT::i32));
993 SDNode* Pd = CurDAG->getMachineNode(Hexagon::C2_tfrrp, dl, MVT::i1,
994 SDValue(IntRegTFR, 0));
997 SDNode* NotPd = CurDAG->getMachineNode(Hexagon::C2_not, dl, MVT::i1,
1001 Result = CurDAG->getMachineNode(Hexagon::C2_xor, dl, MVT::i1,
1002 SDValue(Pd, 0), SDValue(NotPd, 0));
1004 // We have just built:
1006 // Pd = xor(not(Pd), Pd)
1008 ReplaceUses(N, Result);
1013 return SelectCode(N);
1018 // Map add followed by a asr -> asr +=.
1020 SDNode *HexagonDAGToDAGISel::SelectAdd(SDNode *N) {
1022 if (N->getValueType(0) != MVT::i32) {
1023 return SelectCode(N);
1025 // Identify nodes of the form: add(asr(...)).
1026 SDNode* Src1 = N->getOperand(0).getNode();
1027 if (Src1->getOpcode() != ISD::SRA || !Src1->hasOneUse()
1028 || Src1->getValueType(0) != MVT::i32) {
1029 return SelectCode(N);
1032 // Build Rd = Rd' + asr(Rs, Rt). The machine constraints will ensure that
1033 // Rd and Rd' are assigned to the same register
1034 SDNode* Result = CurDAG->getMachineNode(Hexagon::S2_asr_r_r_acc, dl, MVT::i32,
1036 Src1->getOperand(0),
1037 Src1->getOperand(1));
1038 ReplaceUses(N, Result);
1043 SDNode *HexagonDAGToDAGISel::SelectFrameIndex(SDNode *N) {
1044 int FX = cast<FrameIndexSDNode>(N)->getIndex();
1045 SDValue FI = CurDAG->getTargetFrameIndex(FX, MVT::i32);
1046 SDValue Zero = CurDAG->getTargetConstant(0, MVT::i32);
1049 SDNode *R = CurDAG->getMachineNode(Hexagon::TFR_FI, DL, MVT::i32, FI, Zero);
1051 if (N->getHasDebugValue())
1052 CurDAG->TransferDbgValues(SDValue(N, 0), SDValue(R, 0));
1057 SDNode *HexagonDAGToDAGISel::Select(SDNode *N) {
1058 if (N->isMachineOpcode()) {
1060 return nullptr; // Already selected.
1063 switch (N->getOpcode()) {
1065 return SelectConstant(N);
1067 case ISD::ConstantFP:
1068 return SelectConstantFP(N);
1070 case ISD::FrameIndex:
1071 return SelectFrameIndex(N);
1074 return SelectAdd(N);
1077 return SelectSHL(N);
1080 return SelectLoad(N);
1083 return SelectStore(N);
1086 return SelectSelect(N);
1089 return SelectTruncate(N);
1092 return SelectMul(N);
1094 case ISD::ZERO_EXTEND:
1095 return SelectZeroExtend(N);
1097 case ISD::INTRINSIC_WO_CHAIN:
1098 return SelectIntrinsicWOChain(N);
1101 return SelectCode(N);
1105 bool HexagonDAGToDAGISel::
1106 SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID,
1107 std::vector<SDValue> &OutOps) {
1108 SDValue Inp = Op, Res;
1110 switch (ConstraintID) {
1113 case InlineAsm::Constraint_i:
1114 case InlineAsm::Constraint_o: // Offsetable.
1115 case InlineAsm::Constraint_v: // Not offsetable.
1116 case InlineAsm::Constraint_m: // Memory.
1117 if (SelectAddrFI(Inp, Res))
1118 OutOps.push_back(Res);
1120 OutOps.push_back(Inp);
1124 OutOps.push_back(CurDAG->getTargetConstant(0, MVT::i32));
1128 bool HexagonDAGToDAGISel::SelectAddrFI(SDValue& N, SDValue &R) {
1129 if (N.getOpcode() != ISD::FrameIndex)
1131 FrameIndexSDNode *FX = cast<FrameIndexSDNode>(N);
1132 R = CurDAG->getTargetFrameIndex(FX->getIndex(), MVT::i32);
1136 inline bool HexagonDAGToDAGISel::SelectAddrGA(SDValue &N, SDValue &R) {
1137 return SelectGlobalAddress(N, R, false);
1140 inline bool HexagonDAGToDAGISel::SelectAddrGP(SDValue &N, SDValue &R) {
1141 return SelectGlobalAddress(N, R, true);
1144 bool HexagonDAGToDAGISel::SelectGlobalAddress(SDValue &N, SDValue &R,
1146 switch (N.getOpcode()) {
1148 SDValue N0 = N.getOperand(0);
1149 SDValue N1 = N.getOperand(1);
1150 unsigned GAOpc = N0.getOpcode();
1151 if (UseGP && GAOpc != HexagonISD::CONST32_GP)
1153 if (!UseGP && GAOpc != HexagonISD::CONST32)
1155 if (ConstantSDNode *Const = dyn_cast<ConstantSDNode>(N1)) {
1156 SDValue Addr = N0.getOperand(0);
1157 if (GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Addr)) {
1158 if (GA->getOpcode() == ISD::TargetGlobalAddress) {
1159 uint64_t NewOff = GA->getOffset() + (uint64_t)Const->getSExtValue();
1160 R = CurDAG->getTargetGlobalAddress(GA->getGlobal(), SDLoc(Const),
1161 N.getValueType(), NewOff);
1168 case HexagonISD::CONST32:
1169 // The operand(0) of CONST32 is TargetGlobalAddress, which is what we
1170 // want in the instruction.
1172 R = N.getOperand(0);
1174 case HexagonISD::CONST32_GP:
1176 R = N.getOperand(0);
1185 bool HexagonDAGToDAGISel::isValueExtension(const SDValue &Val,
1186 unsigned FromBits, SDValue &Src) {
1187 unsigned Opc = Val.getOpcode();
1189 case ISD::SIGN_EXTEND:
1190 case ISD::ZERO_EXTEND:
1191 case ISD::ANY_EXTEND: {
1192 SDValue const &Op0 = Val.getOperand(0);
1193 EVT T = Op0.getValueType();
1194 if (T.isInteger() && T.getSizeInBits() == FromBits) {
1200 case ISD::SIGN_EXTEND_INREG:
1201 case ISD::AssertSext:
1202 case ISD::AssertZext:
1203 if (Val.getOperand(0).getValueType().isInteger()) {
1204 VTSDNode *T = cast<VTSDNode>(Val.getOperand(1));
1205 if (T->getVT().getSizeInBits() == FromBits) {
1206 Src = Val.getOperand(0);
1212 // Check if this is an AND with "FromBits" of lower bits set to 1.
1213 uint64_t FromMask = (1 << FromBits) - 1;
1214 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Val.getOperand(0))) {
1215 if (C->getZExtValue() == FromMask) {
1216 Src = Val.getOperand(1);
1220 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Val.getOperand(1))) {
1221 if (C->getZExtValue() == FromMask) {
1222 Src = Val.getOperand(0);
1230 // OR/XOR with the lower "FromBits" bits set to 0.
1231 uint64_t FromMask = (1 << FromBits) - 1;
1232 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Val.getOperand(0))) {
1233 if ((C->getZExtValue() & FromMask) == 0) {
1234 Src = Val.getOperand(1);
1238 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Val.getOperand(1))) {
1239 if ((C->getZExtValue() & FromMask) == 0) {
1240 Src = Val.getOperand(0);