1 //===-- PPC32ISelDAGToDAG.cpp - PPC32 pattern matching inst selector ------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Chris Lattner and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a pattern matching instruction selector for 32 bit PowerPC,
11 // converting from a legalized dag to a PPC dag.
13 //===----------------------------------------------------------------------===//
16 #include "PPC32TargetMachine.h"
17 #include "PPC32ISelLowering.h"
18 #include "llvm/CodeGen/MachineInstrBuilder.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/MachineFrameInfo.h"
21 #include "llvm/CodeGen/SSARegMap.h"
22 #include "llvm/CodeGen/SelectionDAG.h"
23 #include "llvm/CodeGen/SelectionDAGISel.h"
24 #include "llvm/Target/TargetOptions.h"
25 #include "llvm/ADT/Statistic.h"
26 #include "llvm/Constants.h"
27 #include "llvm/GlobalValue.h"
28 #include "llvm/Support/Debug.h"
29 #include "llvm/Support/MathExtras.h"
33 Statistic<> FusedFP ("ppc-codegen", "Number of fused fp operations");
34 Statistic<> FrameOff("ppc-codegen", "Number of frame idx offsets collapsed");
36 //===--------------------------------------------------------------------===//
37 /// PPC32DAGToDAGISel - PPC32 specific code to select PPC32 machine
38 /// instructions for SelectionDAG operations.
40 class PPC32DAGToDAGISel : public SelectionDAGISel {
41 PPC32TargetLowering PPC32Lowering;
42 unsigned GlobalBaseReg;
44 PPC32DAGToDAGISel(TargetMachine &TM)
45 : SelectionDAGISel(PPC32Lowering), PPC32Lowering(TM) {}
47 virtual bool runOnFunction(Function &Fn) {
48 // Make sure we re-emit a set of the global base reg if necessary
50 return SelectionDAGISel::runOnFunction(Fn);
53 /// getI32Imm - Return a target constant with the specified value, of type
55 inline SDOperand getI32Imm(unsigned Imm) {
56 return CurDAG->getTargetConstant(Imm, MVT::i32);
59 /// getGlobalBaseReg - insert code into the entry mbb to materialize the PIC
60 /// base register. Return the virtual register that holds this value.
61 SDOperand getGlobalBaseReg();
63 // Select - Convert the specified operand from a target-independent to a
64 // target-specific node if it hasn't already been changed.
65 SDOperand Select(SDOperand Op);
67 SDNode *SelectIntImmediateExpr(SDOperand LHS, SDOperand RHS,
68 unsigned OCHi, unsigned OCLo,
69 bool IsArithmetic = false,
71 SDNode *SelectBitfieldInsert(SDNode *N);
73 /// SelectCC - Select a comparison of the specified values with the
74 /// specified condition code, returning the CR# of the expression.
75 SDOperand SelectCC(SDOperand LHS, SDOperand RHS, ISD::CondCode CC);
77 /// SelectAddr - Given the specified address, return the two operands for a
78 /// load/store instruction, and return true if it should be an indexed [r+r]
80 bool SelectAddr(SDOperand Addr, SDOperand &Op1, SDOperand &Op2);
82 SDOperand BuildSDIVSequence(SDNode *N);
83 SDOperand BuildUDIVSequence(SDNode *N);
85 /// InstructionSelectBasicBlock - This callback is invoked by
86 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
87 virtual void InstructionSelectBasicBlock(SelectionDAG &DAG) {
89 // Select target instructions for the DAG.
90 Select(DAG.getRoot());
91 DAG.RemoveDeadNodes();
93 // Emit machine code to BB.
94 ScheduleAndEmitDAG(DAG);
97 virtual const char *getPassName() const {
98 return "PowerPC DAG->DAG Pattern Instruction Selection";
103 /// getGlobalBaseReg - Output the instructions required to put the
104 /// base address to use for accessing globals into a register.
106 SDOperand PPC32DAGToDAGISel::getGlobalBaseReg() {
107 if (!GlobalBaseReg) {
108 // Insert the set of GlobalBaseReg into the first MBB of the function
109 MachineBasicBlock &FirstMBB = BB->getParent()->front();
110 MachineBasicBlock::iterator MBBI = FirstMBB.begin();
111 SSARegMap *RegMap = BB->getParent()->getSSARegMap();
112 GlobalBaseReg = RegMap->createVirtualRegister(PPC32::GPRCRegisterClass);
113 BuildMI(FirstMBB, MBBI, PPC::MovePCtoLR, 0, PPC::LR);
114 BuildMI(FirstMBB, MBBI, PPC::MFLR, 1, GlobalBaseReg);
116 return CurDAG->getRegister(GlobalBaseReg, MVT::i32);
120 // isIntImmediate - This method tests to see if a constant operand.
121 // If so Imm will receive the 32 bit value.
122 static bool isIntImmediate(SDNode *N, unsigned& Imm) {
123 if (N->getOpcode() == ISD::Constant) {
124 Imm = cast<ConstantSDNode>(N)->getValue();
130 // isOprShiftImm - Returns true if the specified operand is a shift opcode with
131 // a immediate shift count less than 32.
132 static bool isOprShiftImm(SDNode *N, unsigned& Opc, unsigned& SH) {
133 Opc = N->getOpcode();
134 return (Opc == ISD::SHL || Opc == ISD::SRL || Opc == ISD::SRA) &&
135 isIntImmediate(N->getOperand(1).Val, SH) && SH < 32;
138 // isRunOfOnes - Returns true iff Val consists of one contiguous run of 1s with
139 // any number of 0s on either side. The 1s are allowed to wrap from LSB to
140 // MSB, so 0x000FFF0, 0x0000FFFF, and 0xFF0000FF are all runs. 0x0F0F0000 is
141 // not, since all 1s are not contiguous.
142 static bool isRunOfOnes(unsigned Val, unsigned &MB, unsigned &ME) {
143 if (isShiftedMask_32(Val)) {
144 // look for the first non-zero bit
145 MB = CountLeadingZeros_32(Val);
146 // look for the first zero bit after the run of ones
147 ME = CountLeadingZeros_32((Val - 1) ^ Val);
150 Val = ~Val; // invert mask
151 if (isShiftedMask_32(Val)) {
152 // effectively look for the first zero bit
153 ME = CountLeadingZeros_32(Val) - 1;
154 // effectively look for the first one bit after the run of zeros
155 MB = CountLeadingZeros_32((Val - 1) ^ Val) + 1;
163 // isRotateAndMask - Returns true if Mask and Shift can be folded in to a rotate
164 // and mask opcode and mask operation.
165 static bool isRotateAndMask(SDNode *N, unsigned Mask, bool IsShiftMask,
166 unsigned &SH, unsigned &MB, unsigned &ME) {
168 unsigned Indeterminant = ~0; // bit mask marking indeterminant results
169 unsigned Opcode = N->getOpcode();
170 if (!isIntImmediate(N->getOperand(1).Val, Shift) || (Shift > 31))
173 if (Opcode == ISD::SHL) {
174 // apply shift left to mask if it comes first
175 if (IsShiftMask) Mask = Mask << Shift;
176 // determine which bits are made indeterminant by shift
177 Indeterminant = ~(0xFFFFFFFFu << Shift);
178 } else if (Opcode == ISD::SRA || Opcode == ISD::SRL) {
179 // apply shift right to mask if it comes first
180 if (IsShiftMask) Mask = Mask >> Shift;
181 // determine which bits are made indeterminant by shift
182 Indeterminant = ~(0xFFFFFFFFu >> Shift);
183 // adjust for the left rotate
189 // if the mask doesn't intersect any Indeterminant bits
190 if (Mask && !(Mask & Indeterminant)) {
192 // make sure the mask is still a mask (wrap arounds may not be)
193 return isRunOfOnes(Mask, MB, ME);
198 // isOpcWithIntImmediate - This method tests to see if the node is a specific
199 // opcode and that it has a immediate integer right operand.
200 // If so Imm will receive the 32 bit value.
201 static bool isOpcWithIntImmediate(SDNode *N, unsigned Opc, unsigned& Imm) {
202 return N->getOpcode() == Opc && isIntImmediate(N->getOperand(1).Val, Imm);
205 // isOprNot - Returns true if the specified operand is an xor with immediate -1.
206 static bool isOprNot(SDNode *N) {
208 return isOpcWithIntImmediate(N, ISD::XOR, Imm) && (signed)Imm == -1;
211 // Immediate constant composers.
212 // Lo16 - grabs the lo 16 bits from a 32 bit constant.
213 // Hi16 - grabs the hi 16 bits from a 32 bit constant.
214 // HA16 - computes the hi bits required if the lo bits are add/subtracted in
216 static unsigned Lo16(unsigned x) { return x & 0x0000FFFF; }
217 static unsigned Hi16(unsigned x) { return Lo16(x >> 16); }
218 static unsigned HA16(unsigned x) { return Hi16((signed)x - (signed short)x); }
220 // isIntImmediate - This method tests to see if a constant operand.
221 // If so Imm will receive the 32 bit value.
222 static bool isIntImmediate(SDOperand N, unsigned& Imm) {
223 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
224 Imm = (unsigned)CN->getSignExtended();
230 /// SelectBitfieldInsert - turn an or of two masked values into
231 /// the rotate left word immediate then mask insert (rlwimi) instruction.
232 /// Returns true on success, false if the caller still needs to select OR.
234 /// Patterns matched:
235 /// 1. or shl, and 5. or and, and
236 /// 2. or and, shl 6. or shl, shr
237 /// 3. or shr, and 7. or shr, shl
239 SDNode *PPC32DAGToDAGISel::SelectBitfieldInsert(SDNode *N) {
240 bool IsRotate = false;
241 unsigned TgtMask = 0xFFFFFFFF, InsMask = 0xFFFFFFFF, SH = 0;
244 SDOperand Op0 = N->getOperand(0);
245 SDOperand Op1 = N->getOperand(1);
247 unsigned Op0Opc = Op0.getOpcode();
248 unsigned Op1Opc = Op1.getOpcode();
250 // Verify that we have the correct opcodes
251 if (ISD::SHL != Op0Opc && ISD::SRL != Op0Opc && ISD::AND != Op0Opc)
253 if (ISD::SHL != Op1Opc && ISD::SRL != Op1Opc && ISD::AND != Op1Opc)
256 // Generate Mask value for Target
257 if (isIntImmediate(Op0.getOperand(1), Value)) {
259 case ISD::SHL: TgtMask <<= Value; break;
260 case ISD::SRL: TgtMask >>= Value; break;
261 case ISD::AND: TgtMask &= Value; break;
267 // Generate Mask value for Insert
268 if (isIntImmediate(Op1.getOperand(1), Value)) {
273 if (Op0Opc == ISD::SRL) IsRotate = true;
279 if (Op0Opc == ISD::SHL) IsRotate = true;
289 // If both of the inputs are ANDs and one of them has a logical shift by
290 // constant as its input, make that AND the inserted value so that we can
291 // combine the shift into the rotate part of the rlwimi instruction
292 bool IsAndWithShiftOp = false;
293 if (Op0Opc == ISD::AND && Op1Opc == ISD::AND) {
294 if (Op1.getOperand(0).getOpcode() == ISD::SHL ||
295 Op1.getOperand(0).getOpcode() == ISD::SRL) {
296 if (isIntImmediate(Op1.getOperand(0).getOperand(1), Value)) {
297 SH = Op1.getOperand(0).getOpcode() == ISD::SHL ? Value : 32 - Value;
298 IsAndWithShiftOp = true;
300 } else if (Op0.getOperand(0).getOpcode() == ISD::SHL ||
301 Op0.getOperand(0).getOpcode() == ISD::SRL) {
302 if (isIntImmediate(Op0.getOperand(0).getOperand(1), Value)) {
304 std::swap(TgtMask, InsMask);
305 SH = Op1.getOperand(0).getOpcode() == ISD::SHL ? Value : 32 - Value;
306 IsAndWithShiftOp = true;
311 // Verify that the Target mask and Insert mask together form a full word mask
312 // and that the Insert mask is a run of set bits (which implies both are runs
313 // of set bits). Given that, Select the arguments and generate the rlwimi
316 if (((TgtMask & InsMask) == 0) && isRunOfOnes(InsMask, MB, ME)) {
317 bool fullMask = (TgtMask ^ InsMask) == 0xFFFFFFFF;
318 bool Op0IsAND = Op0Opc == ISD::AND;
319 // Check for rotlwi / rotrwi here, a special case of bitfield insert
320 // where both bitfield halves are sourced from the same value.
321 if (IsRotate && fullMask &&
322 N->getOperand(0).getOperand(0) == N->getOperand(1).getOperand(0)) {
323 Op0 = CurDAG->getTargetNode(PPC::RLWINM, MVT::i32,
324 Select(N->getOperand(0).getOperand(0)),
325 getI32Imm(SH), getI32Imm(0), getI32Imm(31));
328 SDOperand Tmp1 = (Op0IsAND && fullMask) ? Select(Op0.getOperand(0))
330 SDOperand Tmp2 = IsAndWithShiftOp ? Select(Op1.getOperand(0).getOperand(0))
331 : Select(Op1.getOperand(0));
332 Op0 = CurDAG->getTargetNode(PPC::RLWIMI, MVT::i32, Tmp1, Tmp2,
333 getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
339 // SelectIntImmediateExpr - Choose code for integer operations with an immediate
341 SDNode *PPC32DAGToDAGISel::SelectIntImmediateExpr(SDOperand LHS, SDOperand RHS,
342 unsigned OCHi, unsigned OCLo,
345 // Check to make sure this is a constant.
346 ConstantSDNode *CN = dyn_cast<ConstantSDNode>(RHS);
347 // Exit if not a constant.
349 // Extract immediate.
350 unsigned C = (unsigned)CN->getValue();
351 // Negate if required (ISD::SUB).
353 // Get the hi and lo portions of constant.
354 unsigned Hi = IsArithmetic ? HA16(C) : Hi16(C);
355 unsigned Lo = Lo16(C);
357 // If two instructions are needed and usage indicates it would be better to
358 // load immediate into a register, bail out.
359 if (Hi && Lo && CN->use_size() > 2) return false;
361 // Select the first operand.
362 SDOperand Opr0 = Select(LHS);
364 if (Lo) // Add in the lo-part.
365 Opr0 = CurDAG->getTargetNode(OCLo, MVT::i32, Opr0, getI32Imm(Lo));
366 if (Hi) // Add in the hi-part.
367 Opr0 = CurDAG->getTargetNode(OCHi, MVT::i32, Opr0, getI32Imm(Hi));
371 /// SelectAddr - Given the specified address, return the two operands for a
372 /// load/store instruction, and return true if it should be an indexed [r+r]
374 bool PPC32DAGToDAGISel::SelectAddr(SDOperand Addr, SDOperand &Op1,
377 if (Addr.getOpcode() == ISD::ADD) {
378 if (isIntImmediate(Addr.getOperand(1), imm) && isInt16(imm)) {
379 Op1 = getI32Imm(Lo16(imm));
380 if (FrameIndexSDNode *FI =
381 dyn_cast<FrameIndexSDNode>(Addr.getOperand(0))) {
383 Op2 = CurDAG->getTargetFrameIndex(FI->getIndex(), MVT::i32);
385 Op2 = Select(Addr.getOperand(0));
389 Op1 = Select(Addr.getOperand(0));
390 Op2 = Select(Addr.getOperand(1));
391 return true; // [r+r]
395 // Now check if we're dealing with a global, and whether or not we should emit
396 // an optimized load or store for statics.
397 if (GlobalAddressSDNode *GN = dyn_cast<GlobalAddressSDNode>(Addr)) {
398 GlobalValue *GV = GN->getGlobal();
399 if (!GV->hasWeakLinkage() && !GV->isExternal()) {
400 Op1 = CurDAG->getTargetGlobalAddress(GV, MVT::i32);
402 Op2 = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),
405 Op2 = CurDAG->getTargetNode(PPC::LIS, MVT::i32, Op1);
408 } else if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Addr)) {
410 Op2 = CurDAG->getTargetFrameIndex(FI->getIndex(), MVT::i32);
412 } else if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Addr)) {
415 Op2 = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),Op1);
417 Op2 = CurDAG->getTargetNode(PPC::LIS, MVT::i32, Op1);
425 /// SelectCC - Select a comparison of the specified values with the specified
426 /// condition code, returning the CR# of the expression.
427 SDOperand PPC32DAGToDAGISel::SelectCC(SDOperand LHS, SDOperand RHS,
429 // Always select the LHS.
432 // Use U to determine whether the SETCC immediate range is signed or not.
433 if (MVT::isInteger(LHS.getValueType())) {
434 bool U = ISD::isUnsignedIntSetCC(CC);
436 if (isIntImmediate(RHS, Imm) &&
437 ((U && isUInt16(Imm)) || (!U && isInt16(Imm))))
438 return CurDAG->getTargetNode(U ? PPC::CMPLWI : PPC::CMPWI, MVT::i32,
439 LHS, getI32Imm(Lo16(Imm)));
440 return CurDAG->getTargetNode(U ? PPC::CMPLW : PPC::CMPW, MVT::i32,
443 return CurDAG->getTargetNode(PPC::FCMPU, MVT::i32, LHS, Select(RHS));
447 /// getBCCForSetCC - Returns the PowerPC condition branch mnemonic corresponding
449 static unsigned getBCCForSetCC(ISD::CondCode CC) {
451 default: assert(0 && "Unknown condition!"); abort();
452 case ISD::SETEQ: return PPC::BEQ;
453 case ISD::SETNE: return PPC::BNE;
455 case ISD::SETLT: return PPC::BLT;
457 case ISD::SETLE: return PPC::BLE;
459 case ISD::SETGT: return PPC::BGT;
461 case ISD::SETGE: return PPC::BGE;
466 /// getCRIdxForSetCC - Return the index of the condition register field
467 /// associated with the SetCC condition, and whether or not the field is
468 /// treated as inverted. That is, lt = 0; ge = 0 inverted.
469 static unsigned getCRIdxForSetCC(ISD::CondCode CC, bool& Inv) {
471 default: assert(0 && "Unknown condition!"); abort();
473 case ISD::SETLT: Inv = false; return 0;
475 case ISD::SETGE: Inv = true; return 0;
477 case ISD::SETGT: Inv = false; return 1;
479 case ISD::SETLE: Inv = true; return 1;
480 case ISD::SETEQ: Inv = false; return 2;
481 case ISD::SETNE: Inv = true; return 2;
486 // Structure used to return the necessary information to codegen an SDIV as
489 int m; // magic number
490 int s; // shift amount
494 unsigned int m; // magic number
495 int a; // add indicator
496 int s; // shift amount
499 /// magic - calculate the magic numbers required to codegen an integer sdiv as
500 /// a sequence of multiply and shifts. Requires that the divisor not be 0, 1,
502 static struct ms magic(int d) {
504 unsigned int ad, anc, delta, q1, r1, q2, r2, t;
505 const unsigned int two31 = 0x80000000U;
509 t = two31 + ((unsigned int)d >> 31);
510 anc = t - 1 - t%ad; // absolute value of nc
511 p = 31; // initialize p
512 q1 = two31/anc; // initialize q1 = 2p/abs(nc)
513 r1 = two31 - q1*anc; // initialize r1 = rem(2p,abs(nc))
514 q2 = two31/ad; // initialize q2 = 2p/abs(d)
515 r2 = two31 - q2*ad; // initialize r2 = rem(2p,abs(d))
518 q1 = 2*q1; // update q1 = 2p/abs(nc)
519 r1 = 2*r1; // update r1 = rem(2p/abs(nc))
520 if (r1 >= anc) { // must be unsigned comparison
524 q2 = 2*q2; // update q2 = 2p/abs(d)
525 r2 = 2*r2; // update r2 = rem(2p/abs(d))
526 if (r2 >= ad) { // must be unsigned comparison
531 } while (q1 < delta || (q1 == delta && r1 == 0));
534 if (d < 0) mag.m = -mag.m; // resulting magic number
535 mag.s = p - 32; // resulting shift
539 /// magicu - calculate the magic numbers required to codegen an integer udiv as
540 /// a sequence of multiply, add and shifts. Requires that the divisor not be 0.
541 static struct mu magicu(unsigned d)
544 unsigned int nc, delta, q1, r1, q2, r2;
546 magu.a = 0; // initialize "add" indicator
548 p = 31; // initialize p
549 q1 = 0x80000000/nc; // initialize q1 = 2p/nc
550 r1 = 0x80000000 - q1*nc; // initialize r1 = rem(2p,nc)
551 q2 = 0x7FFFFFFF/d; // initialize q2 = (2p-1)/d
552 r2 = 0x7FFFFFFF - q2*d; // initialize r2 = rem((2p-1),d)
555 if (r1 >= nc - r1 ) {
556 q1 = 2*q1 + 1; // update q1
557 r1 = 2*r1 - nc; // update r1
560 q1 = 2*q1; // update q1
561 r1 = 2*r1; // update r1
563 if (r2 + 1 >= d - r2) {
564 if (q2 >= 0x7FFFFFFF) magu.a = 1;
565 q2 = 2*q2 + 1; // update q2
566 r2 = 2*r2 + 1 - d; // update r2
569 if (q2 >= 0x80000000) magu.a = 1;
570 q2 = 2*q2; // update q2
571 r2 = 2*r2 + 1; // update r2
574 } while (p < 64 && (q1 < delta || (q1 == delta && r1 == 0)));
575 magu.m = q2 + 1; // resulting magic number
576 magu.s = p - 32; // resulting shift
580 /// BuildSDIVSequence - Given an ISD::SDIV node expressing a divide by constant,
581 /// return a DAG expression to select that will generate the same value by
582 /// multiplying by a magic number. See:
583 /// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html>
584 SDOperand PPC32DAGToDAGISel::BuildSDIVSequence(SDNode *N) {
585 int d = (int)cast<ConstantSDNode>(N->getOperand(1))->getValue();
586 ms magics = magic(d);
587 // Multiply the numerator (operand 0) by the magic value
588 SDOperand Q = CurDAG->getNode(ISD::MULHS, MVT::i32, N->getOperand(0),
589 CurDAG->getConstant(magics.m, MVT::i32));
590 // If d > 0 and m < 0, add the numerator
591 if (d > 0 && magics.m < 0)
592 Q = CurDAG->getNode(ISD::ADD, MVT::i32, Q, N->getOperand(0));
593 // If d < 0 and m > 0, subtract the numerator.
594 if (d < 0 && magics.m > 0)
595 Q = CurDAG->getNode(ISD::SUB, MVT::i32, Q, N->getOperand(0));
596 // Shift right algebraic if shift value is nonzero
598 Q = CurDAG->getNode(ISD::SRA, MVT::i32, Q,
599 CurDAG->getConstant(magics.s, MVT::i32));
600 // Extract the sign bit and add it to the quotient
602 CurDAG->getNode(ISD::SRL, MVT::i32, Q, CurDAG->getConstant(31, MVT::i32));
603 return CurDAG->getNode(ISD::ADD, MVT::i32, Q, T);
606 /// BuildUDIVSequence - Given an ISD::UDIV node expressing a divide by constant,
607 /// return a DAG expression to select that will generate the same value by
608 /// multiplying by a magic number. See:
609 /// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html>
610 SDOperand PPC32DAGToDAGISel::BuildUDIVSequence(SDNode *N) {
611 unsigned d = (unsigned)cast<ConstantSDNode>(N->getOperand(1))->getValue();
612 mu magics = magicu(d);
613 // Multiply the numerator (operand 0) by the magic value
614 SDOperand Q = CurDAG->getNode(ISD::MULHU, MVT::i32, N->getOperand(0),
615 CurDAG->getConstant(magics.m, MVT::i32));
617 return CurDAG->getNode(ISD::SRL, MVT::i32, Q,
618 CurDAG->getConstant(magics.s, MVT::i32));
620 SDOperand NPQ = CurDAG->getNode(ISD::SUB, MVT::i32, N->getOperand(0), Q);
621 NPQ = CurDAG->getNode(ISD::SRL, MVT::i32, NPQ,
622 CurDAG->getConstant(1, MVT::i32));
623 NPQ = CurDAG->getNode(ISD::ADD, MVT::i32, NPQ, Q);
624 return CurDAG->getNode(ISD::SRL, MVT::i32, NPQ,
625 CurDAG->getConstant(magics.s-1, MVT::i32));
629 // Select - Convert the specified operand from a target-independent to a
630 // target-specific node if it hasn't already been changed.
631 SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
633 if (N->getOpcode() >= ISD::BUILTIN_OP_END &&
634 N->getOpcode() < PPCISD::FIRST_NUMBER)
635 return Op; // Already selected.
637 switch (N->getOpcode()) {
639 std::cerr << "Cannot yet select: ";
643 case ISD::EntryToken: // These leaves remain the same.
645 case ISD::TokenFactor: {
647 if (N->getNumOperands() == 2) {
648 SDOperand Op0 = Select(N->getOperand(0));
649 SDOperand Op1 = Select(N->getOperand(1));
650 New = CurDAG->getNode(ISD::TokenFactor, MVT::Other, Op0, Op1);
652 std::vector<SDOperand> Ops;
653 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
654 Ops.push_back(Select(N->getOperand(i)));
655 New = CurDAG->getNode(ISD::TokenFactor, MVT::Other, Ops);
659 CurDAG->ReplaceAllUsesWith(Op, New);
664 case ISD::CopyFromReg: {
665 SDOperand Chain = Select(N->getOperand(0));
666 if (Chain == N->getOperand(0)) return Op; // No change
667 SDOperand New = CurDAG->getCopyFromReg(Chain,
668 cast<RegisterSDNode>(N->getOperand(1))->getReg(), N->getValueType(0));
669 return New.getValue(Op.ResNo);
671 case ISD::CopyToReg: {
672 SDOperand Chain = Select(N->getOperand(0));
673 SDOperand Reg = N->getOperand(1);
674 SDOperand Val = Select(N->getOperand(2));
675 if (Chain != N->getOperand(0) || Val != N->getOperand(2)) {
676 SDOperand New = CurDAG->getNode(ISD::CopyToReg, MVT::Other,
678 CurDAG->ReplaceAllUsesWith(Op, New);
683 case ISD::Constant: {
684 assert(N->getValueType(0) == MVT::i32);
685 unsigned v = (unsigned)cast<ConstantSDNode>(N)->getValue();
686 unsigned Hi = HA16(v);
687 unsigned Lo = Lo16(v);
689 SDOperand Top = CurDAG->getTargetNode(PPC::LIS, MVT::i32,
691 CurDAG->SelectNodeTo(N, PPC::ORI, MVT::i32, Top, getI32Imm(v & 0xFFFF));
693 CurDAG->SelectNodeTo(N, PPC::LI, MVT::i32, getI32Imm(v));
695 CurDAG->SelectNodeTo(N, PPC::LIS, MVT::i32, getI32Imm(v >> 16));
700 if (N->getValueType(0) == MVT::i32)
701 CurDAG->SelectNodeTo(N, PPC::IMPLICIT_DEF_GPR, MVT::i32);
703 CurDAG->SelectNodeTo(N, PPC::IMPLICIT_DEF_FP, N->getValueType(0));
705 case ISD::FrameIndex: {
706 int FI = cast<FrameIndexSDNode>(N)->getIndex();
707 CurDAG->SelectNodeTo(N, PPC::ADDI, MVT::i32,
708 CurDAG->getTargetFrameIndex(FI, MVT::i32),
712 case ISD::ConstantPool: {
713 Constant *C = cast<ConstantPoolSDNode>(N)->get();
714 SDOperand Tmp, CPI = CurDAG->getTargetConstantPool(C, MVT::i32);
716 Tmp = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),CPI);
718 Tmp = CurDAG->getTargetNode(PPC::LIS, MVT::i32, CPI);
719 CurDAG->SelectNodeTo(N, PPC::LA, MVT::i32, Tmp, CPI);
722 case ISD::GlobalAddress: {
723 GlobalValue *GV = cast<GlobalAddressSDNode>(N)->getGlobal();
725 SDOperand GA = CurDAG->getTargetGlobalAddress(GV, MVT::i32);
727 Tmp = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(), GA);
729 Tmp = CurDAG->getTargetNode(PPC::LIS, MVT::i32, GA);
731 if (GV->hasWeakLinkage() || GV->isExternal())
732 CurDAG->SelectNodeTo(N, PPC::LWZ, MVT::i32, GA, Tmp);
734 CurDAG->SelectNodeTo(N, PPC::LA, MVT::i32, Tmp, GA);
737 case ISD::SIGN_EXTEND_INREG:
738 switch(cast<VTSDNode>(N->getOperand(1))->getVT()) {
739 default: assert(0 && "Illegal type in SIGN_EXTEND_INREG"); break;
741 CurDAG->SelectNodeTo(N, PPC::EXTSH, MVT::i32, Select(N->getOperand(0)));
744 CurDAG->SelectNodeTo(N, PPC::EXTSB, MVT::i32, Select(N->getOperand(0)));
749 assert(N->getValueType(0) == MVT::i32);
750 CurDAG->SelectNodeTo(N, PPC::CNTLZW, MVT::i32, Select(N->getOperand(0)));
753 CurDAG->SelectNodeTo(N, PPC::FSEL, N->getValueType(0),
754 Select(N->getOperand(0)),
755 Select(N->getOperand(1)),
756 Select(N->getOperand(2)));
759 MVT::ValueType Ty = N->getValueType(0);
760 if (Ty == MVT::i32) {
761 if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0), N->getOperand(1),
762 PPC::ADDIS, PPC::ADDI, true)) {
763 CurDAG->ReplaceAllUsesWith(Op, SDOperand(I, 0));
766 CurDAG->SelectNodeTo(N, PPC::ADD, MVT::i32, Select(N->getOperand(0)),
767 Select(N->getOperand(1)));
772 if (!NoExcessFPPrecision) { // Match FMA ops
773 if (N->getOperand(0).getOpcode() == ISD::MUL &&
774 N->getOperand(0).Val->hasOneUse()) {
775 ++FusedFP; // Statistic
776 CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FMADD : PPC::FMADDS, Ty,
777 Select(N->getOperand(0).getOperand(0)),
778 Select(N->getOperand(0).getOperand(1)),
779 Select(N->getOperand(1)));
781 } else if (N->getOperand(1).getOpcode() == ISD::MUL &&
782 N->getOperand(1).hasOneUse()) {
783 ++FusedFP; // Statistic
784 CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FMADD : PPC::FMADDS, Ty,
785 Select(N->getOperand(1).getOperand(0)),
786 Select(N->getOperand(1).getOperand(1)),
787 Select(N->getOperand(0)));
792 CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FADD : PPC::FADDS, Ty,
793 Select(N->getOperand(0)), Select(N->getOperand(1)));
797 MVT::ValueType Ty = N->getValueType(0);
798 if (Ty == MVT::i32) {
800 if (isIntImmediate(N->getOperand(0), Imm) && isInt16(Imm)) {
802 CurDAG->SelectNodeTo(N, PPC::NEG, Ty, Select(N->getOperand(1)));
804 CurDAG->SelectNodeTo(N, PPC::SUBFIC, Ty, Select(N->getOperand(1)),
805 getI32Imm(Lo16(Imm)));
808 if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0), N->getOperand(1),
809 PPC::ADDIS, PPC::ADDI, true, true)) {
810 CurDAG->ReplaceAllUsesWith(Op, SDOperand(I, 0));
813 CurDAG->SelectNodeTo(N, PPC::SUBF, Ty, Select(N->getOperand(1)),
814 Select(N->getOperand(0)));
819 if (!NoExcessFPPrecision) { // Match FMA ops
820 if (N->getOperand(0).getOpcode() == ISD::MUL &&
821 N->getOperand(0).Val->hasOneUse()) {
822 ++FusedFP; // Statistic
823 CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FMSUB : PPC::FMSUBS, Ty,
824 Select(N->getOperand(0).getOperand(0)),
825 Select(N->getOperand(0).getOperand(1)),
826 Select(N->getOperand(1)));
828 } else if (N->getOperand(1).getOpcode() == ISD::MUL &&
829 N->getOperand(1).Val->hasOneUse()) {
830 ++FusedFP; // Statistic
831 CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FNMSUB : PPC::FNMSUBS, Ty,
832 Select(N->getOperand(1).getOperand(0)),
833 Select(N->getOperand(1).getOperand(1)),
834 Select(N->getOperand(0)));
838 CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FSUB : PPC::FSUBS, Ty,
839 Select(N->getOperand(0)),
840 Select(N->getOperand(1)));
845 if (isIntImmediate(N->getOperand(1), Imm) && isInt16(Imm)) {
846 CurDAG->SelectNodeTo(N, PPC::MULLI, MVT::i32,
847 Select(N->getOperand(0)), getI32Imm(Lo16(Imm)));
850 switch (N->getValueType(0)) {
851 default: assert(0 && "Unhandled multiply type!");
852 case MVT::i32: Opc = PPC::MULLW; break;
853 case MVT::f32: Opc = PPC::FMULS; break;
854 case MVT::f64: Opc = PPC::FMUL; break;
856 CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), Select(N->getOperand(0)),
857 Select(N->getOperand(1)));
862 if (isIntImmediate(N->getOperand(1), Imm)) {
863 if ((signed)Imm > 0 && isPowerOf2_32(Imm)) {
865 CurDAG->getTargetNode(PPC::SRAWI, MVT::i32, MVT::Flag,
866 Select(N->getOperand(0)),
867 getI32Imm(Log2_32(Imm)));
868 CurDAG->SelectNodeTo(N, PPC::ADDZE, MVT::i32,
869 Op.getValue(0), Op.getValue(1));
871 } else if ((signed)Imm < 0 && isPowerOf2_32(-Imm)) {
873 CurDAG->getTargetNode(PPC::SRAWI, MVT::Flag, MVT::i32,
874 Select(N->getOperand(0)),
875 getI32Imm(Log2_32(-Imm)));
877 CurDAG->getTargetNode(PPC::ADDZE, MVT::i32, Op.getValue(1),
879 CurDAG->SelectNodeTo(N, PPC::NEG, MVT::i32, PT);
882 SDOperand Result = Select(BuildSDIVSequence(N));
883 assert(Result.ResNo == 0);
884 CurDAG->ReplaceAllUsesWith(Op, Result);
891 switch (N->getValueType(0)) {
892 default: assert(0 && "Unknown type to ISD::SDIV");
893 case MVT::i32: Opc = PPC::DIVW; break;
894 case MVT::f32: Opc = PPC::FDIVS; break;
895 case MVT::f64: Opc = PPC::FDIV; break;
897 CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), Select(N->getOperand(0)),
898 Select(N->getOperand(1)));
902 // If this is a divide by constant, we can emit code using some magic
903 // constants to implement it as a multiply instead.
905 if (isIntImmediate(N->getOperand(1), Imm) && Imm) {
906 SDOperand Result = Select(BuildUDIVSequence(N));
907 assert(Result.ResNo == 0);
908 CurDAG->ReplaceAllUsesWith(Op, Result);
913 CurDAG->SelectNodeTo(N, PPC::DIVWU, MVT::i32, Select(N->getOperand(0)),
914 Select(N->getOperand(1)));
918 assert(N->getValueType(0) == MVT::i32);
919 CurDAG->SelectNodeTo(N, PPC::MULHW, MVT::i32, Select(N->getOperand(0)),
920 Select(N->getOperand(1)));
923 assert(N->getValueType(0) == MVT::i32);
924 CurDAG->SelectNodeTo(N, PPC::MULHWU, MVT::i32, Select(N->getOperand(0)),
925 Select(N->getOperand(1)));
929 // If this is an and of a value rotated between 0 and 31 bits and then and'd
930 // with a mask, emit rlwinm
931 if (isIntImmediate(N->getOperand(1), Imm) && (isShiftedMask_32(Imm) ||
932 isShiftedMask_32(~Imm))) {
935 if (isRotateAndMask(N->getOperand(0).Val, Imm, false, SH, MB, ME)) {
936 Val = Select(N->getOperand(0).getOperand(0));
938 Val = Select(N->getOperand(0));
939 isRunOfOnes(Imm, MB, ME);
942 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Val, getI32Imm(SH),
943 getI32Imm(MB), getI32Imm(ME));
946 // If this is an and with an immediate that isn't a mask, then codegen it as
947 // high and low 16 bit immediate ands.
948 if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0),
950 PPC::ANDISo, PPC::ANDIo)) {
951 CurDAG->ReplaceAllUsesWith(Op, SDOperand(I, 0));
955 // Finally, check for the case where we are being asked to select
956 // and (not(a), b) or and (a, not(b)) which can be selected as andc.
957 if (isOprNot(N->getOperand(0).Val))
958 CurDAG->SelectNodeTo(N, PPC::ANDC, MVT::i32, Select(N->getOperand(1)),
959 Select(N->getOperand(0).getOperand(0)));
960 else if (isOprNot(N->getOperand(1).Val))
961 CurDAG->SelectNodeTo(N, PPC::ANDC, MVT::i32, Select(N->getOperand(0)),
962 Select(N->getOperand(1).getOperand(0)));
964 CurDAG->SelectNodeTo(N, PPC::AND, MVT::i32, Select(N->getOperand(0)),
965 Select(N->getOperand(1)));
969 if (SDNode *I = SelectBitfieldInsert(N)) {
970 CurDAG->ReplaceAllUsesWith(Op, SDOperand(I, 0));
974 if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0),
976 PPC::ORIS, PPC::ORI)) {
977 CurDAG->ReplaceAllUsesWith(Op, SDOperand(I, 0));
981 // Finally, check for the case where we are being asked to select
982 // 'or (not(a), b)' or 'or (a, not(b))' which can be selected as orc.
983 if (isOprNot(N->getOperand(0).Val))
984 CurDAG->SelectNodeTo(N, PPC::ORC, MVT::i32, Select(N->getOperand(1)),
985 Select(N->getOperand(0).getOperand(0)));
986 else if (isOprNot(N->getOperand(1).Val))
987 CurDAG->SelectNodeTo(N, PPC::ORC, MVT::i32, Select(N->getOperand(0)),
988 Select(N->getOperand(1).getOperand(0)));
990 CurDAG->SelectNodeTo(N, PPC::OR, MVT::i32, Select(N->getOperand(0)),
991 Select(N->getOperand(1)));
994 // Check whether or not this node is a logical 'not'. This is represented
995 // by llvm as a xor with the constant value -1 (all bits set). If this is a
996 // 'not', then fold 'or' into 'nor', and so forth for the supported ops.
999 SDOperand Val = Select(N->getOperand(0));
1000 switch (Val.isTargetOpcode() ? Val.getTargetOpcode() : 0) {
1001 default: Opc = 0; break;
1002 case PPC::OR: Opc = PPC::NOR; break;
1003 case PPC::AND: Opc = PPC::NAND; break;
1004 case PPC::XOR: Opc = PPC::EQV; break;
1007 CurDAG->SelectNodeTo(N, Opc, MVT::i32, Val.getOperand(0),
1010 CurDAG->SelectNodeTo(N, PPC::NOR, MVT::i32, Val, Val);
1013 // If this is a xor with an immediate other than -1, then codegen it as high
1014 // and low 16 bit immediate xors.
1015 if (SDNode *I = SelectIntImmediateExpr(N->getOperand(0),
1017 PPC::XORIS, PPC::XORI)) {
1018 CurDAG->ReplaceAllUsesWith(Op, SDOperand(I, 0));
1022 // Finally, check for the case where we are being asked to select
1023 // xor (not(a), b) which is equivalent to not(xor a, b), which is eqv
1024 if (isOprNot(N->getOperand(0).Val))
1025 CurDAG->SelectNodeTo(N, PPC::EQV, MVT::i32,
1026 Select(N->getOperand(0).getOperand(0)),
1027 Select(N->getOperand(1)));
1029 CurDAG->SelectNodeTo(N, PPC::XOR, MVT::i32, Select(N->getOperand(0)),
1030 Select(N->getOperand(1)));
1033 unsigned Imm, SH, MB, ME;
1034 if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
1035 isRotateAndMask(N, Imm, true, SH, MB, ME))
1036 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32,
1037 Select(N->getOperand(0).getOperand(0)),
1038 getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
1039 else if (isIntImmediate(N->getOperand(1), Imm))
1040 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Select(N->getOperand(0)),
1041 getI32Imm(Imm), getI32Imm(0), getI32Imm(31-Imm));
1043 CurDAG->SelectNodeTo(N, PPC::SLW, MVT::i32, Select(N->getOperand(0)),
1044 Select(N->getOperand(1)));
1048 unsigned Imm, SH, MB, ME;
1049 if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
1050 isRotateAndMask(N, Imm, true, SH, MB, ME))
1051 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32,
1052 Select(N->getOperand(0).getOperand(0)),
1053 getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
1054 else if (isIntImmediate(N->getOperand(1), Imm))
1055 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Select(N->getOperand(0)),
1056 getI32Imm(32-Imm), getI32Imm(Imm), getI32Imm(31));
1058 CurDAG->SelectNodeTo(N, PPC::SRW, MVT::i32, Select(N->getOperand(0)),
1059 Select(N->getOperand(1)));
1063 unsigned Imm, SH, MB, ME;
1064 if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
1065 isRotateAndMask(N, Imm, true, SH, MB, ME))
1066 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32,
1067 Select(N->getOperand(0).getOperand(0)),
1068 getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
1069 else if (isIntImmediate(N->getOperand(1), Imm))
1070 CurDAG->SelectNodeTo(N, PPC::SRAWI, MVT::i32, Select(N->getOperand(0)),
1073 CurDAG->SelectNodeTo(N, PPC::SRAW, MVT::i32, Select(N->getOperand(0)),
1074 Select(N->getOperand(1)));
1078 CurDAG->SelectNodeTo(N, PPC::FABS, N->getValueType(0),
1079 Select(N->getOperand(0)));
1081 case ISD::FP_EXTEND: {
1082 assert(MVT::f64 == N->getValueType(0) &&
1083 MVT::f32 == N->getOperand(0).getValueType() && "Illegal FP_EXTEND");
1084 std::vector<SDOperand> Tmp;
1085 Tmp.push_back(Select(N->getOperand(0)));
1086 CurDAG->ReplaceAllUsesWith(N, Tmp); // Just use the operand as the result.
1090 assert(MVT::f32 == N->getValueType(0) &&
1091 MVT::f64 == N->getOperand(0).getValueType() && "Illegal FP_ROUND");
1092 CurDAG->SelectNodeTo(N, PPC::FRSP, MVT::f32, Select(N->getOperand(0)));
1094 case ISD::FP_TO_SINT: {
1095 SDOperand In = Select(N->getOperand(0));
1096 In = CurDAG->getTargetNode(PPC::FCTIWZ, MVT::f64, In);
1098 int FrameIdx = BB->getParent()->getFrameInfo()->CreateStackObject(8, 8);
1099 SDOperand FI = CurDAG->getTargetFrameIndex(FrameIdx, MVT::f64);
1100 SDOperand ST = CurDAG->getTargetNode(PPC::STFD, MVT::Other, In, getI32Imm(0), FI);
1101 CurDAG->SelectNodeTo(N, PPC::LWZ, MVT::i32, MVT::Other, getI32Imm(4), FI, ST);
1105 SDOperand Val = Select(N->getOperand(0));
1106 MVT::ValueType Ty = N->getValueType(0);
1107 if (Val.Val->hasOneUse()) {
1109 switch (Val.isTargetOpcode() ? Val.getTargetOpcode() : 0) {
1110 default: Opc = 0; break;
1111 case PPC::FABS: Opc = PPC::FNABS; break;
1112 case PPC::FMADD: Opc = PPC::FNMADD; break;
1113 case PPC::FMADDS: Opc = PPC::FNMADDS; break;
1114 case PPC::FMSUB: Opc = PPC::FNMSUB; break;
1115 case PPC::FMSUBS: Opc = PPC::FNMSUBS; break;
1117 // If we inverted the opcode, then emit the new instruction with the
1118 // inverted opcode and the original instruction's operands. Otherwise,
1119 // fall through and generate a fneg instruction.
1121 if (PPC::FNABS == Opc)
1122 CurDAG->SelectNodeTo(N, Opc, Ty, Val.getOperand(0));
1124 CurDAG->SelectNodeTo(N, Opc, Ty, Val.getOperand(0),
1125 Val.getOperand(1), Val.getOperand(2));
1129 CurDAG->SelectNodeTo(N, PPC::FNEG, Ty, Val);
1133 MVT::ValueType Ty = N->getValueType(0);
1134 CurDAG->SelectNodeTo(N, Ty == MVT::f64 ? PPC::FSQRT : PPC::FSQRTS, Ty,
1135 Select(N->getOperand(0)));
1139 case ISD::ADD_PARTS: {
1140 SDOperand LHSL = Select(N->getOperand(0));
1141 SDOperand LHSH = Select(N->getOperand(1));
1144 bool ME = false, ZE = false;
1145 if (isIntImmediate(N->getOperand(3), Imm)) {
1146 ME = (signed)Imm == -1;
1150 std::vector<SDOperand> Result;
1151 SDOperand CarryFromLo;
1152 if (isIntImmediate(N->getOperand(2), Imm) &&
1153 ((signed)Imm >= -32768 || (signed)Imm < 32768)) {
1154 // Codegen the low 32 bits of the add. Interestingly, there is no
1155 // shifted form of add immediate carrying.
1156 CarryFromLo = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
1157 LHSL, getI32Imm(Imm));
1159 CarryFromLo = CurDAG->getTargetNode(PPC::ADDC, MVT::i32, MVT::Flag,
1160 LHSL, Select(N->getOperand(2)));
1162 CarryFromLo = CarryFromLo.getValue(1);
1164 // Codegen the high 32 bits, adding zero, minus one, or the full value
1165 // along with the carry flag produced by addc/addic.
1168 ResultHi = CurDAG->getTargetNode(PPC::ADDZE, MVT::i32, LHSH, CarryFromLo);
1170 ResultHi = CurDAG->getTargetNode(PPC::ADDME, MVT::i32, LHSH, CarryFromLo);
1172 ResultHi = CurDAG->getTargetNode(PPC::ADDE, MVT::i32, LHSH,
1173 Select(N->getOperand(3)), CarryFromLo);
1174 Result.push_back(ResultHi);
1175 Result.push_back(CarryFromLo.getValue(0));
1176 CurDAG->ReplaceAllUsesWith(N, Result);
1177 return Result[Op.ResNo];
1179 case ISD::SUB_PARTS: {
1180 SDOperand LHSL = Select(N->getOperand(0));
1181 SDOperand LHSH = Select(N->getOperand(1));
1182 SDOperand RHSL = Select(N->getOperand(2));
1183 SDOperand RHSH = Select(N->getOperand(3));
1185 std::vector<SDOperand> Result;
1186 Result.push_back(CurDAG->getTargetNode(PPC::SUBFC, MVT::i32, MVT::Flag,
1188 Result.push_back(CurDAG->getTargetNode(PPC::SUBFE, MVT::i32, RHSH, LHSH,
1189 Result[0].getValue(1)));
1190 CurDAG->ReplaceAllUsesWith(N, Result);
1191 return Result[Op.ResNo];
1193 case ISD::SHL_PARTS: {
1194 SDOperand HI = Select(N->getOperand(0));
1195 SDOperand LO = Select(N->getOperand(1));
1196 SDOperand SH = Select(N->getOperand(2));
1197 SDOperand SH_LO_R = CurDAG->getTargetNode(PPC::SUBFIC, MVT::i32, MVT::Flag,
1199 SDOperand SH_LO_L = CurDAG->getTargetNode(PPC::ADDI, MVT::i32, SH,
1200 getI32Imm((unsigned)-32));
1201 SDOperand HI_SHL = CurDAG->getTargetNode(PPC::SLW, MVT::i32, HI, SH);
1202 SDOperand HI_LOR = CurDAG->getTargetNode(PPC::SRW, MVT::i32, LO, SH_LO_R);
1203 SDOperand HI_LOL = CurDAG->getTargetNode(PPC::SLW, MVT::i32, LO, SH_LO_L);
1204 SDOperand HI_OR = CurDAG->getTargetNode(PPC::OR, MVT::i32, HI_SHL, HI_LOR);
1206 std::vector<SDOperand> Result;
1207 Result.push_back(CurDAG->getTargetNode(PPC::SLW, MVT::i32, LO, SH));
1208 Result.push_back(CurDAG->getTargetNode(PPC::OR, MVT::i32, HI_OR, HI_LOL));
1209 CurDAG->ReplaceAllUsesWith(N, Result);
1210 return Result[Op.ResNo];
1212 case ISD::SRL_PARTS: {
1213 SDOperand HI = Select(N->getOperand(0));
1214 SDOperand LO = Select(N->getOperand(1));
1215 SDOperand SH = Select(N->getOperand(2));
1216 SDOperand SH_HI_L = CurDAG->getTargetNode(PPC::SUBFIC, MVT::i32, MVT::Flag,
1218 SDOperand SH_HI_R = CurDAG->getTargetNode(PPC::ADDI, MVT::i32, SH,
1219 getI32Imm((unsigned)-32));
1220 SDOperand LO_SHR = CurDAG->getTargetNode(PPC::SRW, MVT::i32, LO, SH);
1221 SDOperand LO_HIL = CurDAG->getTargetNode(PPC::SLW, MVT::i32, HI, SH_HI_L);
1222 SDOperand LO_HIR = CurDAG->getTargetNode(PPC::SRW, MVT::i32, HI, SH_HI_R);
1223 SDOperand LO_OR = CurDAG->getTargetNode(PPC::OR, MVT::i32, LO_SHR, LO_HIL);
1225 std::vector<SDOperand> Result;
1226 Result.push_back(CurDAG->getTargetNode(PPC::OR, MVT::i32, LO_OR, LO_HIR));
1227 Result.push_back(CurDAG->getTargetNode(PPC::SRW, MVT::i32, HI, SH));
1228 CurDAG->ReplaceAllUsesWith(N, Result);
1229 return Result[Op.ResNo];
1235 case ISD::SEXTLOAD: {
1237 bool isIdx = SelectAddr(N->getOperand(1), Op1, Op2);
1239 MVT::ValueType TypeBeingLoaded = (N->getOpcode() == ISD::LOAD) ?
1240 N->getValueType(0) : cast<VTSDNode>(N->getOperand(3))->getVT();
1242 switch (TypeBeingLoaded) {
1243 default: N->dump(); assert(0 && "Cannot load this type!");
1245 case MVT::i8: Opc = isIdx ? PPC::LBZX : PPC::LBZ; break;
1247 if (N->getOpcode() == ISD::SEXTLOAD) { // SEXT load?
1248 Opc = isIdx ? PPC::LHAX : PPC::LHA;
1250 Opc = isIdx ? PPC::LHZX : PPC::LHZ;
1253 case MVT::i32: Opc = isIdx ? PPC::LWZX : PPC::LWZ; break;
1254 case MVT::f32: Opc = isIdx ? PPC::LFSX : PPC::LFS; break;
1255 case MVT::f64: Opc = isIdx ? PPC::LFDX : PPC::LFD; break;
1258 CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), MVT::Other,
1259 Op1, Op2, Select(N->getOperand(0)));
1263 case ISD::TRUNCSTORE:
1265 SDOperand AddrOp1, AddrOp2;
1266 bool isIdx = SelectAddr(N->getOperand(2), AddrOp1, AddrOp2);
1269 if (N->getOpcode() == ISD::STORE) {
1270 switch (N->getOperand(1).getValueType()) {
1271 default: assert(0 && "unknown Type in store");
1272 case MVT::i32: Opc = isIdx ? PPC::STWX : PPC::STW; break;
1273 case MVT::f64: Opc = isIdx ? PPC::STFDX : PPC::STFD; break;
1274 case MVT::f32: Opc = isIdx ? PPC::STFSX : PPC::STFS; break;
1276 } else { //ISD::TRUNCSTORE
1277 switch(cast<VTSDNode>(N->getOperand(4))->getVT()) {
1278 default: assert(0 && "unknown Type in store");
1280 case MVT::i8: Opc = isIdx ? PPC::STBX : PPC::STB; break;
1281 case MVT::i16: Opc = isIdx ? PPC::STHX : PPC::STH; break;
1285 CurDAG->SelectNodeTo(N, Opc, MVT::Other, Select(N->getOperand(1)),
1286 AddrOp1, AddrOp2, Select(N->getOperand(0)));
1292 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
1293 if (isIntImmediate(N->getOperand(1), Imm)) {
1294 // We can codegen setcc op, imm very efficiently compared to a brcond.
1295 // Check for those cases here.
1298 SDOperand Op = Select(N->getOperand(0));
1300 default: assert(0 && "Unhandled SetCC condition"); abort();
1302 Op = CurDAG->getTargetNode(PPC::CNTLZW, MVT::i32, Op);
1303 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Op, getI32Imm(27),
1304 getI32Imm(5), getI32Imm(31));
1307 SDOperand AD = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
1308 Op, getI32Imm(~0U));
1309 CurDAG->SelectNodeTo(N, PPC::SUBFE, MVT::i32, AD, Op, AD.getValue(1));
1313 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Op, getI32Imm(1),
1314 getI32Imm(31), getI32Imm(31));
1317 SDOperand T = CurDAG->getTargetNode(PPC::NEG, MVT::i32, Op);
1318 T = CurDAG->getTargetNode(PPC::ANDC, MVT::i32, T, Op);;
1319 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, T, getI32Imm(1),
1320 getI32Imm(31), getI32Imm(31));
1325 } else if (Imm == ~0U) { // setcc op, -1
1326 SDOperand Op = Select(N->getOperand(0));
1328 default: assert(0 && "Unhandled SetCC condition"); abort();
1330 Op = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
1332 CurDAG->SelectNodeTo(N, PPC::ADDZE, MVT::i32,
1333 CurDAG->getTargetNode(PPC::LI, MVT::i32,
1338 Op = CurDAG->getTargetNode(PPC::NOR, MVT::i32, Op, Op);
1339 SDOperand AD = CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, Op,
1341 CurDAG->SelectNodeTo(N, PPC::SUBFE, MVT::i32, AD, Op, AD.getValue(1));
1345 SDOperand AD = CurDAG->getTargetNode(PPC::ADDI, MVT::i32, Op,
1347 SDOperand AN = CurDAG->getTargetNode(PPC::AND, MVT::i32, AD, Op);
1348 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, AN, getI32Imm(1),
1349 getI32Imm(31), getI32Imm(31));
1353 Op = CurDAG->getTargetNode(PPC::RLWINM, MVT::i32, Op, getI32Imm(1),
1354 getI32Imm(31), getI32Imm(31));
1355 CurDAG->SelectNodeTo(N, PPC::XORI, MVT::i32, Op, getI32Imm(1));
1363 unsigned Idx = getCRIdxForSetCC(CC, Inv);
1365 SelectCC(Select(N->getOperand(0)), Select(N->getOperand(1)), CC);
1368 // Force the ccreg into CR7.
1369 SDOperand CR7Reg = CurDAG->getRegister(PPC::CR7, MVT::i32);
1371 std::vector<MVT::ValueType> VTs;
1372 VTs.push_back(MVT::Other);
1373 VTs.push_back(MVT::Flag); // NONSTANDARD CopyToReg node: defines a flag
1374 std::vector<SDOperand> Ops;
1375 Ops.push_back(CurDAG->getEntryNode());
1376 Ops.push_back(CR7Reg);
1377 Ops.push_back(CCReg);
1378 CCReg = CurDAG->getNode(ISD::CopyToReg, VTs, Ops).getValue(1);
1380 if (TLI.getTargetMachine().getSubtarget<PPCSubtarget>().isGigaProcessor())
1381 IntCR = CurDAG->getTargetNode(PPC::MFOCRF, MVT::i32, CR7Reg, CCReg);
1383 IntCR = CurDAG->getTargetNode(PPC::MFCR, MVT::i32, CCReg);
1386 CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, IntCR,
1387 getI32Imm(32-(3-Idx)), getI32Imm(31), getI32Imm(31));
1390 CurDAG->getTargetNode(PPC::RLWINM, MVT::i32, IntCR,
1391 getI32Imm(32-(3-Idx)), getI32Imm(31),getI32Imm(31));
1392 CurDAG->SelectNodeTo(N, PPC::XORI, MVT::i32, Tmp, getI32Imm(1));
1398 case ISD::SELECT_CC: {
1399 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
1401 // handle the setcc cases here. select_cc lhs, 0, 1, 0, cc
1402 if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N->getOperand(1)))
1403 if (ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N->getOperand(2)))
1404 if (ConstantSDNode *N3C = dyn_cast<ConstantSDNode>(N->getOperand(3)))
1405 if (N1C->isNullValue() && N3C->isNullValue() &&
1406 N2C->getValue() == 1ULL && CC == ISD::SETNE) {
1407 SDOperand LHS = Select(N->getOperand(0));
1409 CurDAG->getTargetNode(PPC::ADDIC, MVT::i32, MVT::Flag,
1410 LHS, getI32Imm(~0U));
1411 CurDAG->SelectNodeTo(N, PPC::SUBFE, MVT::i32, Tmp, LHS,
1416 SDOperand CCReg = SelectCC(Select(N->getOperand(0)),
1417 Select(N->getOperand(1)), CC);
1418 unsigned BROpc = getBCCForSetCC(CC);
1420 bool isFP = MVT::isFloatingPoint(N->getValueType(0));
1421 unsigned SelectCCOp = isFP ? PPC::SELECT_CC_FP : PPC::SELECT_CC_Int;
1422 CurDAG->SelectNodeTo(N, SelectCCOp, N->getValueType(0), CCReg,
1423 Select(N->getOperand(2)), Select(N->getOperand(3)),
1428 case ISD::CALLSEQ_START:
1429 case ISD::CALLSEQ_END: {
1430 unsigned Amt = cast<ConstantSDNode>(N->getOperand(1))->getValue();
1431 unsigned Opc = N->getOpcode() == ISD::CALLSEQ_START ?
1432 PPC::ADJCALLSTACKDOWN : PPC::ADJCALLSTACKUP;
1433 CurDAG->SelectNodeTo(N, Opc, MVT::Other,
1434 getI32Imm(Amt), Select(N->getOperand(0)));
1438 case ISD::TAILCALL: {
1439 SDOperand Chain = Select(N->getOperand(0));
1441 unsigned CallOpcode;
1442 std::vector<SDOperand> CallOperands;
1444 if (GlobalAddressSDNode *GASD =
1445 dyn_cast<GlobalAddressSDNode>(N->getOperand(1))) {
1446 CallOpcode = PPC::CALLpcrel;
1447 CallOperands.push_back(CurDAG->getTargetGlobalAddress(GASD->getGlobal(),
1449 } else if (ExternalSymbolSDNode *ESSDN =
1450 dyn_cast<ExternalSymbolSDNode>(N->getOperand(1))) {
1451 CallOpcode = PPC::CALLpcrel;
1452 CallOperands.push_back(N->getOperand(1));
1454 // Copy the callee address into the CTR register.
1455 SDOperand Callee = Select(N->getOperand(1));
1456 Chain = CurDAG->getTargetNode(PPC::MTCTR, MVT::Other, Callee, Chain);
1458 // Copy the callee address into R12 on darwin.
1459 SDOperand R12 = CurDAG->getRegister(PPC::R12, MVT::i32);
1460 Chain = CurDAG->getNode(ISD::CopyToReg, MVT::Other, Chain, R12, Callee);
1462 CallOperands.push_back(getI32Imm(20)); // Information to encode indcall
1463 CallOperands.push_back(getI32Imm(0)); // Information to encode indcall
1464 CallOperands.push_back(R12);
1465 CallOpcode = PPC::CALLindirect;
1468 unsigned GPR_idx = 0, FPR_idx = 0;
1469 static const unsigned GPR[] = {
1470 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
1471 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
1473 static const unsigned FPR[] = {
1474 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
1475 PPC::F8, PPC::F9, PPC::F10, PPC::F11, PPC::F12, PPC::F13
1478 for (unsigned i = 2, e = N->getNumOperands(); i != e; ++i)
1479 if (N->getOperand(i).getOpcode() != ISD::UNDEF) {
1480 unsigned DestReg = 0;
1481 MVT::ValueType RegTy;
1482 if (N->getOperand(i).getValueType() == MVT::i32) {
1483 assert(GPR_idx < 8 && "Too many int args");
1484 DestReg = GPR[GPR_idx++];
1487 assert(MVT::isFloatingPoint(N->getOperand(i).getValueType()) &&
1488 "Unpromoted integer arg?");
1489 assert(FPR_idx < 13 && "Too many fp args");
1490 DestReg = FPR[FPR_idx++];
1491 RegTy = MVT::f64; // Even if this is really f32!
1494 SDOperand Reg = CurDAG->getRegister(DestReg, RegTy);
1495 Chain = CurDAG->getNode(ISD::CopyToReg, MVT::Other, Chain, Reg,
1496 Select(N->getOperand(i)));
1497 CallOperands.push_back(Reg);
1500 // Finally, once everything is in registers to pass to the call, emit the
1502 CallOperands.push_back(Chain);
1503 Chain = CurDAG->getTargetNode(CallOpcode, MVT::Other, CallOperands);
1505 std::vector<SDOperand> CallResults;
1507 // If the call has results, copy the values out of the ret val registers.
1508 switch (N->getValueType(0)) {
1509 default: assert(0 && "Unexpected ret value!");
1510 case MVT::Other: break;
1512 if (N->getValueType(1) == MVT::i32) {
1513 Chain = CurDAG->getCopyFromReg(Chain, PPC::R4, MVT::i32).getValue(1);
1514 CallResults.push_back(Chain.getValue(0));
1515 Chain = CurDAG->getCopyFromReg(Chain, PPC::R3, MVT::i32).getValue(1);
1516 CallResults.push_back(Chain.getValue(0));
1518 Chain = CurDAG->getCopyFromReg(Chain, PPC::R3, MVT::i32).getValue(1);
1519 CallResults.push_back(Chain.getValue(0));
1524 Chain = CurDAG->getCopyFromReg(Chain, PPC::F1, MVT::f64).getValue(1);
1525 CallResults.push_back(Chain.getValue(0));
1529 CallResults.push_back(Chain);
1530 CurDAG->ReplaceAllUsesWith(N, CallResults);
1531 return CallResults[Op.ResNo];
1534 SDOperand Chain = Select(N->getOperand(0)); // Token chain.
1536 if (N->getNumOperands() > 1) {
1537 SDOperand Val = Select(N->getOperand(1));
1538 switch (N->getOperand(1).getValueType()) {
1539 default: assert(0 && "Unknown return type!");
1542 Chain = CurDAG->getCopyToReg(Chain, PPC::F1, Val);
1545 Chain = CurDAG->getCopyToReg(Chain, PPC::R3, Val);
1549 if (N->getNumOperands() > 2) {
1550 assert(N->getOperand(1).getValueType() == MVT::i32 &&
1551 N->getOperand(2).getValueType() == MVT::i32 &&
1552 N->getNumOperands() == 3 && "Unknown two-register ret value!");
1553 Val = Select(N->getOperand(2));
1554 Chain = CurDAG->getCopyToReg(Chain, PPC::R4, Val);
1558 // Finally, select this to a blr (return) instruction.
1559 CurDAG->SelectNodeTo(N, PPC::BLR, MVT::Other, Chain);
1563 CurDAG->SelectNodeTo(N, PPC::B, MVT::Other, N->getOperand(1),
1564 Select(N->getOperand(0)));
1567 case ISD::BRTWOWAY_CC: {
1568 SDOperand Chain = Select(N->getOperand(0));
1569 MachineBasicBlock *Dest =
1570 cast<BasicBlockSDNode>(N->getOperand(4))->getBasicBlock();
1571 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(1))->get();
1572 SDOperand CondCode = SelectCC(N->getOperand(2), N->getOperand(3), CC);
1573 unsigned Opc = getBCCForSetCC(CC);
1575 // If this is a two way branch, then grab the fallthrough basic block
1576 // argument and build a PowerPC branch pseudo-op, suitable for long branch
1577 // conversion if necessary by the branch selection pass. Otherwise, emit a
1578 // standard conditional branch.
1579 if (N->getOpcode() == ISD::BRTWOWAY_CC) {
1580 MachineBasicBlock *Fallthrough =
1581 cast<BasicBlockSDNode>(N->getOperand(5))->getBasicBlock();
1582 SDOperand CB = CurDAG->getTargetNode(PPC::COND_BRANCH, MVT::Other,
1583 CondCode, getI32Imm(Opc),
1584 N->getOperand(4), N->getOperand(5),
1586 CurDAG->SelectNodeTo(N, PPC::B, MVT::Other, N->getOperand(5), CB);
1588 // Iterate to the next basic block
1589 ilist<MachineBasicBlock>::iterator It = BB;
1592 // If the fallthrough path is off the end of the function, which would be
1593 // undefined behavior, set it to be the same as the current block because
1594 // we have nothing better to set it to, and leaving it alone will cause
1595 // the PowerPC Branch Selection pass to crash.
1596 if (It == BB->getParent()->end()) It = Dest;
1597 CurDAG->SelectNodeTo(N, PPC::COND_BRANCH, MVT::Other, CondCode,
1598 getI32Imm(Opc), N->getOperand(4),
1599 CurDAG->getBasicBlock(It), Chain);
1604 return SDOperand(N, Op.ResNo);
1608 /// createPPC32ISelDag - This pass converts a legalized DAG into a
1609 /// PowerPC-specific DAG, ready for instruction scheduling.
1611 FunctionPass *llvm::createPPC32ISelDag(TargetMachine &TM) {
1612 return new PPC32DAGToDAGISel(TM);