1 //===- AlphaISelPattern.cpp - A pattern matching inst selector for Alpha --===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group 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 Alpha.
12 //===----------------------------------------------------------------------===//
15 #include "AlphaRegisterInfo.h"
16 #include "AlphaISelLowering.h"
17 #include "llvm/Constants.h" // FIXME: REMOVE
18 #include "llvm/Function.h"
19 #include "llvm/Module.h"
20 #include "llvm/CodeGen/MachineInstrBuilder.h"
21 #include "llvm/CodeGen/MachineConstantPool.h" // FIXME: REMOVE
22 #include "llvm/CodeGen/MachineFunction.h"
23 #include "llvm/CodeGen/MachineFrameInfo.h"
24 #include "llvm/CodeGen/SelectionDAG.h"
25 #include "llvm/CodeGen/SelectionDAGISel.h"
26 #include "llvm/CodeGen/SSARegMap.h"
27 #include "llvm/Target/TargetData.h"
28 #include "llvm/Target/TargetLowering.h"
29 #include "llvm/Support/MathExtras.h"
30 #include "llvm/ADT/Statistic.h"
31 #include "llvm/Support/Debug.h"
32 #include "llvm/Support/CommandLine.h"
38 cl::opt<bool> EnableAlphaIDIV("enable-alpha-intfpdiv",
39 cl::desc("Use the FP div instruction for integer div when possible"),
41 cl::opt<bool> EnableAlphaFTOI("enable-alpha-FTOI",
42 cl::desc("Enable use of ftoi* and itof* instructions (ev6 and higher)"),
44 cl::opt<bool> EnableAlphaCT("enable-alpha-CT",
45 cl::desc("Enable use of the ctpop, ctlz, and cttz instructions"),
47 cl::opt<bool> EnableAlphaCount("enable-alpha-count",
48 cl::desc("Print estimates on live ins and outs"),
50 cl::opt<bool> EnableAlphaLSMark("enable-alpha-lsmark",
51 cl::desc("Emit symbols to correlate Mem ops to LLVM Values"),
57 //===--------------------------------------------------------------------===//
58 /// ISel - Alpha specific code to select Alpha machine instructions for
59 /// SelectionDAG operations.
60 //===--------------------------------------------------------------------===//
61 class AlphaISel : public SelectionDAGISel {
63 /// AlphaLowering - This object fully describes how to lower LLVM code to an
64 /// Alpha-specific SelectionDAG.
65 AlphaTargetLowering AlphaLowering;
67 SelectionDAG *ISelDAG; // Hack to support us having a dag->dag transform
68 // for sdiv and udiv until it is put into the future
71 /// ExprMap - As shared expressions are codegen'd, we keep track of which
72 /// vreg the value is produced in, so we only emit one copy of each compiled
74 static const unsigned notIn = (unsigned)(-1);
75 std::map<SDOperand, unsigned> ExprMap;
77 //CCInvMap sometimes (SetNE) we have the inverse CC code for free
78 std::map<SDOperand, unsigned> CCInvMap;
86 AlphaISel(TargetMachine &TM) : SelectionDAGISel(AlphaLowering),
90 /// InstructionSelectBasicBlock - This callback is invoked by
91 /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
92 virtual void InstructionSelectBasicBlock(SelectionDAG &DAG) {
99 // Codegen the basic block.
101 max_depth = DAG.getRoot().getNodeDepth();
102 Select(DAG.getRoot());
107 std::cerr << "COUNT: "
108 << BB->getParent()->getFunction ()->getName() << " "
109 << BB->getNumber() << " "
112 << count_outs << "\n";
114 // Clear state used for selection.
119 virtual void EmitFunctionEntryCode(Function &Fn, MachineFunction &MF);
121 unsigned SelectExpr(SDOperand N);
122 void Select(SDOperand N);
124 void SelectAddr(SDOperand N, unsigned& Reg, long& offset);
125 void SelectBranchCC(SDOperand N);
126 void MoveFP2Int(unsigned src, unsigned dst, bool isDouble);
127 void MoveInt2FP(unsigned src, unsigned dst, bool isDouble);
128 //returns whether the sense of the comparison was inverted
129 bool SelectFPSetCC(SDOperand N, unsigned dst);
131 // dag -> dag expanders for integer divide by constant
132 SDOperand BuildSDIVSequence(SDOperand N);
133 SDOperand BuildUDIVSequence(SDOperand N);
138 void AlphaISel::EmitFunctionEntryCode(Function &Fn, MachineFunction &MF) {
139 // If this function has live-in values, emit the copies from pregs to vregs at
140 // the top of the function, before anything else.
141 MachineBasicBlock *BB = MF.begin();
142 if (MF.livein_begin() != MF.livein_end()) {
143 SSARegMap *RegMap = MF.getSSARegMap();
144 for (MachineFunction::livein_iterator LI = MF.livein_begin(),
145 E = MF.livein_end(); LI != E; ++LI) {
146 const TargetRegisterClass *RC = RegMap->getRegClass(LI->second);
147 if (RC == Alpha::GPRCRegisterClass) {
148 BuildMI(BB, Alpha::BIS, 2, LI->second).addReg(LI->first)
150 } else if (RC == Alpha::FPRCRegisterClass) {
151 BuildMI(BB, Alpha::CPYS, 2, LI->second).addReg(LI->first)
154 assert(0 && "Unknown regclass!");
160 static bool isSIntImmediate(SDOperand N, int64_t& Imm) {
162 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
164 Imm = CN->getSignExtended();
172 // isSIntImmediateBounded - This method tests to see if a constant operand
173 // bounded s.t. low <= Imm <= high
174 // If so Imm will receive the 64 bit value.
175 static bool isSIntImmediateBounded(SDOperand N, int64_t& Imm,
176 int64_t low, int64_t high) {
177 if (isSIntImmediate(N, Imm) && Imm <= high && Imm >= low)
181 static bool isUIntImmediate(SDOperand N, uint64_t& Imm) {
183 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
185 Imm = (uint64_t)CN->getValue();
193 static bool isUIntImmediateBounded(SDOperand N, uint64_t& Imm,
194 uint64_t low, uint64_t high) {
195 if (isUIntImmediate(N, Imm) && Imm <= high && Imm >= low)
200 static void getValueInfo(const Value* v, int& type, int& fun, int& offset)
202 fun = type = offset = 0;
205 } else if (const GlobalValue* GV = dyn_cast<GlobalValue>(v)) {
207 const Module* M = GV->getParent();
208 for(Module::const_global_iterator ii = M->global_begin(); &*ii != GV; ++ii)
210 } else if (const Argument* Arg = dyn_cast<Argument>(v)) {
212 const Function* F = Arg->getParent();
213 const Module* M = F->getParent();
214 for(Module::const_iterator ii = M->begin(); &*ii != F; ++ii)
216 for(Function::const_arg_iterator ii = F->arg_begin(); &*ii != Arg; ++ii)
218 } else if (const Instruction* I = dyn_cast<Instruction>(v)) {
219 assert(dyn_cast<PointerType>(I->getType()));
221 const BasicBlock* bb = I->getParent();
222 const Function* F = bb->getParent();
223 const Module* M = F->getParent();
224 for(Module::const_iterator ii = M->begin(); &*ii != F; ++ii)
226 for(Function::const_iterator ii = F->begin(); &*ii != bb; ++ii)
227 offset += ii->size();
228 for(BasicBlock::const_iterator ii = bb->begin(); &*ii != I; ++ii)
230 } else if (const Constant* C = dyn_cast<Constant>(v)) {
231 //Don't know how to look these up yet
234 assert(0 && "Error in value marking");
236 //type = 4: register spilling
237 //type = 5: global address loading or constant loading
246 //Factorize a number using the list of constants
247 static bool factorize(int v[], int res[], int size, uint64_t c)
250 while (c != 1 && cont)
253 for(int i = 0; i < size; ++i)
267 //Shamelessly adapted from PPC32
268 // Structure used to return the necessary information to codegen an SDIV as
271 int64_t m; // magic number
272 int64_t s; // shift amount
276 uint64_t m; // magic number
277 int64_t a; // add indicator
278 int64_t s; // shift amount
281 /// magic - calculate the magic numbers required to codegen an integer sdiv as
282 /// a sequence of multiply and shifts. Requires that the divisor not be 0, 1,
284 static struct ms magic(int64_t d) {
286 uint64_t ad, anc, delta, q1, r1, q2, r2, t;
287 const uint64_t two63 = 9223372036854775808ULL; // 2^63
291 t = two63 + ((uint64_t)d >> 63);
292 anc = t - 1 - t%ad; // absolute value of nc
293 p = 63; // initialize p
294 q1 = two63/anc; // initialize q1 = 2p/abs(nc)
295 r1 = two63 - q1*anc; // initialize r1 = rem(2p,abs(nc))
296 q2 = two63/ad; // initialize q2 = 2p/abs(d)
297 r2 = two63 - q2*ad; // initialize r2 = rem(2p,abs(d))
300 q1 = 2*q1; // update q1 = 2p/abs(nc)
301 r1 = 2*r1; // update r1 = rem(2p/abs(nc))
302 if (r1 >= anc) { // must be unsigned comparison
306 q2 = 2*q2; // update q2 = 2p/abs(d)
307 r2 = 2*r2; // update r2 = rem(2p/abs(d))
308 if (r2 >= ad) { // must be unsigned comparison
313 } while (q1 < delta || (q1 == delta && r1 == 0));
316 if (d < 0) mag.m = -mag.m; // resulting magic number
317 mag.s = p - 64; // resulting shift
321 /// magicu - calculate the magic numbers required to codegen an integer udiv as
322 /// a sequence of multiply, add and shifts. Requires that the divisor not be 0.
323 static struct mu magicu(uint64_t d)
326 uint64_t nc, delta, q1, r1, q2, r2;
328 magu.a = 0; // initialize "add" indicator
330 p = 63; // initialize p
331 q1 = 0x8000000000000000ull/nc; // initialize q1 = 2p/nc
332 r1 = 0x8000000000000000ull - q1*nc; // initialize r1 = rem(2p,nc)
333 q2 = 0x7FFFFFFFFFFFFFFFull/d; // initialize q2 = (2p-1)/d
334 r2 = 0x7FFFFFFFFFFFFFFFull - q2*d; // initialize r2 = rem((2p-1),d)
337 if (r1 >= nc - r1 ) {
338 q1 = 2*q1 + 1; // update q1
339 r1 = 2*r1 - nc; // update r1
342 q1 = 2*q1; // update q1
343 r1 = 2*r1; // update r1
345 if (r2 + 1 >= d - r2) {
346 if (q2 >= 0x7FFFFFFFFFFFFFFFull) magu.a = 1;
347 q2 = 2*q2 + 1; // update q2
348 r2 = 2*r2 + 1 - d; // update r2
351 if (q2 >= 0x8000000000000000ull) magu.a = 1;
352 q2 = 2*q2; // update q2
353 r2 = 2*r2 + 1; // update r2
356 } while (p < 64 && (q1 < delta || (q1 == delta && r1 == 0)));
357 magu.m = q2 + 1; // resulting magic number
358 magu.s = p - 64; // resulting shift
362 /// BuildSDIVSequence - Given an ISD::SDIV node expressing a divide by constant,
363 /// return a DAG expression to select that will generate the same value by
364 /// multiplying by a magic number. See:
365 /// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html>
366 SDOperand AlphaISel::BuildSDIVSequence(SDOperand N) {
367 int64_t d = (int64_t)cast<ConstantSDNode>(N.getOperand(1))->getSignExtended();
368 ms magics = magic(d);
369 // Multiply the numerator (operand 0) by the magic value
370 SDOperand Q = ISelDAG->getNode(ISD::MULHS, MVT::i64, N.getOperand(0),
371 ISelDAG->getConstant(magics.m, MVT::i64));
372 // If d > 0 and m < 0, add the numerator
373 if (d > 0 && magics.m < 0)
374 Q = ISelDAG->getNode(ISD::ADD, MVT::i64, Q, N.getOperand(0));
375 // If d < 0 and m > 0, subtract the numerator.
376 if (d < 0 && magics.m > 0)
377 Q = ISelDAG->getNode(ISD::SUB, MVT::i64, Q, N.getOperand(0));
378 // Shift right algebraic if shift value is nonzero
380 Q = ISelDAG->getNode(ISD::SRA, MVT::i64, Q,
381 ISelDAG->getConstant(magics.s, MVT::i64));
382 // Extract the sign bit and add it to the quotient
384 ISelDAG->getNode(ISD::SRL, MVT::i64, Q, ISelDAG->getConstant(63, MVT::i64));
385 return ISelDAG->getNode(ISD::ADD, MVT::i64, Q, T);
388 /// BuildUDIVSequence - Given an ISD::UDIV node expressing a divide by constant,
389 /// return a DAG expression to select that will generate the same value by
390 /// multiplying by a magic number. See:
391 /// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html>
392 SDOperand AlphaISel::BuildUDIVSequence(SDOperand N) {
394 (unsigned)cast<ConstantSDNode>(N.getOperand(1))->getSignExtended();
395 mu magics = magicu(d);
396 // Multiply the numerator (operand 0) by the magic value
397 SDOperand Q = ISelDAG->getNode(ISD::MULHU, MVT::i64, N.getOperand(0),
398 ISelDAG->getConstant(magics.m, MVT::i64));
400 Q = ISelDAG->getNode(ISD::SRL, MVT::i64, Q,
401 ISelDAG->getConstant(magics.s, MVT::i64));
403 SDOperand NPQ = ISelDAG->getNode(ISD::SUB, MVT::i64, N.getOperand(0), Q);
404 NPQ = ISelDAG->getNode(ISD::SRL, MVT::i64, NPQ,
405 ISelDAG->getConstant(1, MVT::i64));
406 NPQ = ISelDAG->getNode(ISD::ADD, MVT::i64, NPQ, Q);
407 Q = ISelDAG->getNode(ISD::SRL, MVT::i64, NPQ,
408 ISelDAG->getConstant(magics.s-1, MVT::i64));
413 //These describe LDAx
414 static const int IMM_LOW = -32768;
415 static const int IMM_HIGH = 32767;
416 static const int IMM_MULT = 65536;
418 static long getUpper16(long l)
420 long y = l / IMM_MULT;
421 if (l % IMM_MULT > IMM_HIGH)
426 static long getLower16(long l)
428 long h = getUpper16(l);
429 return l - h * IMM_MULT;
432 static unsigned GetRelVersion(unsigned opcode)
435 default: assert(0 && "unknown load or store"); return 0;
436 case Alpha::LDQ: return Alpha::LDQr;
437 case Alpha::LDS: return Alpha::LDSr;
438 case Alpha::LDT: return Alpha::LDTr;
439 case Alpha::LDL: return Alpha::LDLr;
440 case Alpha::LDBU: return Alpha::LDBUr;
441 case Alpha::LDWU: return Alpha::LDWUr;
442 case Alpha::STB: return Alpha::STBr;
443 case Alpha::STW: return Alpha::STWr;
444 case Alpha::STL: return Alpha::STLr;
445 case Alpha::STQ: return Alpha::STQr;
446 case Alpha::STS: return Alpha::STSr;
447 case Alpha::STT: return Alpha::STTr;
452 void AlphaISel::MoveFP2Int(unsigned src, unsigned dst, bool isDouble)
455 if (EnableAlphaFTOI) {
456 Opc = isDouble ? Alpha::FTOIT : Alpha::FTOIS;
457 BuildMI(BB, Opc, 1, dst).addReg(src).addReg(Alpha::F31);
460 // Spill the integer to memory and reload it from there.
461 unsigned Size = MVT::getSizeInBits(MVT::f64)/8;
462 MachineFunction *F = BB->getParent();
463 int FrameIdx = F->getFrameInfo()->CreateStackObject(Size, 8);
465 if (EnableAlphaLSMark)
466 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(4).addImm(0).addImm(0)
468 Opc = isDouble ? Alpha::STT : Alpha::STS;
469 BuildMI(BB, Opc, 3).addReg(src).addFrameIndex(FrameIdx).addReg(Alpha::F31);
471 if (EnableAlphaLSMark)
472 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(4).addImm(0).addImm(0)
474 Opc = isDouble ? Alpha::LDQ : Alpha::LDL;
475 BuildMI(BB, Alpha::LDQ, 2, dst).addFrameIndex(FrameIdx).addReg(Alpha::F31);
479 void AlphaISel::MoveInt2FP(unsigned src, unsigned dst, bool isDouble)
482 if (EnableAlphaFTOI) {
483 Opc = isDouble?Alpha::ITOFT:Alpha::ITOFS;
484 BuildMI(BB, Opc, 1, dst).addReg(src).addReg(Alpha::R31);
487 // Spill the integer to memory and reload it from there.
488 unsigned Size = MVT::getSizeInBits(MVT::f64)/8;
489 MachineFunction *F = BB->getParent();
490 int FrameIdx = F->getFrameInfo()->CreateStackObject(Size, 8);
492 if (EnableAlphaLSMark)
493 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(4).addImm(0).addImm(0)
495 Opc = isDouble ? Alpha::STQ : Alpha::STL;
496 BuildMI(BB, Opc, 3).addReg(src).addFrameIndex(FrameIdx).addReg(Alpha::F31);
498 if (EnableAlphaLSMark)
499 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(4).addImm(0).addImm(0)
501 Opc = isDouble ? Alpha::LDT : Alpha::LDS;
502 BuildMI(BB, Opc, 2, dst).addFrameIndex(FrameIdx).addReg(Alpha::F31);
506 bool AlphaISel::SelectFPSetCC(SDOperand N, unsigned dst)
508 SDNode *SetCC = N.Val;
509 unsigned Opc, Tmp1, Tmp2, Tmp3;
510 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC->getOperand(2))->get();
515 default: SetCC->dump(); assert(0 && "Unknown FP comparison!");
516 case ISD::SETEQ: Opc = Alpha::CMPTEQ; break;
517 case ISD::SETLT: Opc = Alpha::CMPTLT; break;
518 case ISD::SETLE: Opc = Alpha::CMPTLE; break;
519 case ISD::SETGT: Opc = Alpha::CMPTLT; rev = true; break;
520 case ISD::SETGE: Opc = Alpha::CMPTLE; rev = true; break;
521 case ISD::SETNE: Opc = Alpha::CMPTEQ; inv = true; break;
524 ConstantFPSDNode *CN;
525 if ((CN = dyn_cast<ConstantFPSDNode>(SetCC->getOperand(0)))
526 && (CN->isExactlyValue(+0.0) || CN->isExactlyValue(-0.0)))
529 Tmp1 = SelectExpr(N.getOperand(0));
531 if ((CN = dyn_cast<ConstantFPSDNode>(SetCC->getOperand(1)))
532 && (CN->isExactlyValue(+0.0) || CN->isExactlyValue(-0.0)))
535 Tmp2 = SelectExpr(N.getOperand(1));
537 //Can only compare doubles, and dag won't promote for me
538 if (SetCC->getOperand(0).getValueType() == MVT::f32)
540 //assert(0 && "Setcc On float?\n");
541 std::cerr << "Setcc on float!\n";
542 Tmp3 = MakeReg(MVT::f64);
543 BuildMI(BB, Alpha::CVTST, 1, Tmp3).addReg(Alpha::F31).addReg(Tmp1);
546 if (SetCC->getOperand(1).getValueType() == MVT::f32)
548 //assert (0 && "Setcc On float?\n");
549 std::cerr << "Setcc on float!\n";
550 Tmp3 = MakeReg(MVT::f64);
551 BuildMI(BB, Alpha::CVTST, 1, Tmp3).addReg(Alpha::F31).addReg(Tmp2);
555 if (rev) std::swap(Tmp1, Tmp2);
557 BuildMI(BB, Opc, 2, dst).addReg(Tmp1).addReg(Tmp2);
561 //Check to see if the load is a constant offset from a base register
562 void AlphaISel::SelectAddr(SDOperand N, unsigned& Reg, long& offset)
564 unsigned opcode = N.getOpcode();
565 if (opcode == ISD::ADD && N.getOperand(1).getOpcode() == ISD::Constant &&
566 cast<ConstantSDNode>(N.getOperand(1))->getValue() <= 32767)
568 Reg = SelectExpr(N.getOperand(0));
569 offset = cast<ConstantSDNode>(N.getOperand(1))->getValue();
577 void AlphaISel::SelectBranchCC(SDOperand N)
579 assert(N.getOpcode() == ISD::BRCOND && "Not a BranchCC???");
580 MachineBasicBlock *Dest =
581 cast<BasicBlockSDNode>(N.getOperand(2))->getBasicBlock();
582 unsigned Opc = Alpha::WTF;
584 Select(N.getOperand(0)); //chain
585 SDOperand CC = N.getOperand(1);
587 if (CC.getOpcode() == ISD::SETCC)
589 ISD::CondCode cCode= cast<CondCodeSDNode>(CC.getOperand(2))->get();
590 if (MVT::isInteger(CC.getOperand(0).getValueType())) {
591 //Dropping the CC is only useful if we are comparing to 0
592 bool RightZero = CC.getOperand(1).getOpcode() == ISD::Constant &&
593 cast<ConstantSDNode>(CC.getOperand(1))->getValue() == 0;
597 if(cCode == ISD::SETNE)
602 default: CC.Val->dump(); assert(0 && "Unknown integer comparison!");
603 case ISD::SETEQ: Opc = Alpha::BEQ; break;
604 case ISD::SETLT: Opc = Alpha::BLT; break;
605 case ISD::SETLE: Opc = Alpha::BLE; break;
606 case ISD::SETGT: Opc = Alpha::BGT; break;
607 case ISD::SETGE: Opc = Alpha::BGE; break;
608 case ISD::SETULT: assert(0 && "x (unsigned) < 0 is never true"); break;
609 case ISD::SETUGT: Opc = Alpha::BNE; break;
610 //Technically you could have this CC
611 case ISD::SETULE: Opc = Alpha::BEQ; break;
612 case ISD::SETUGE: assert(0 && "x (unsgined >= 0 is always true"); break;
613 case ISD::SETNE: Opc = Alpha::BNE; break;
615 unsigned Tmp1 = SelectExpr(CC.getOperand(0)); //Cond
616 BuildMI(BB, Opc, 2).addReg(Tmp1).addMBB(Dest);
619 unsigned Tmp1 = SelectExpr(CC);
621 BuildMI(BB, Alpha::BEQ, 2).addReg(CCInvMap[CC]).addMBB(Dest);
623 BuildMI(BB, Alpha::BNE, 2).addReg(Tmp1).addMBB(Dest);
627 //Any comparison between 2 values should be codegened as an folded
628 //branch, as moving CC to the integer register is very expensive
629 //for a cmp b: c = a - b;
634 bool invTest = false;
637 ConstantFPSDNode *CN;
638 if ((CN = dyn_cast<ConstantFPSDNode>(CC.getOperand(1)))
639 && (CN->isExactlyValue(+0.0) || CN->isExactlyValue(-0.0)))
640 Tmp3 = SelectExpr(CC.getOperand(0));
641 else if ((CN = dyn_cast<ConstantFPSDNode>(CC.getOperand(0)))
642 && (CN->isExactlyValue(+0.0) || CN->isExactlyValue(-0.0)))
644 Tmp3 = SelectExpr(CC.getOperand(1));
649 unsigned Tmp1 = SelectExpr(CC.getOperand(0));
650 unsigned Tmp2 = SelectExpr(CC.getOperand(1));
651 bool isD = CC.getOperand(0).getValueType() == MVT::f64;
652 Tmp3 = MakeReg(isD ? MVT::f64 : MVT::f32);
653 BuildMI(BB, isD ? Alpha::SUBT : Alpha::SUBS, 2, Tmp3)
654 .addReg(Tmp1).addReg(Tmp2);
658 default: CC.Val->dump(); assert(0 && "Unknown FP comparison!");
659 case ISD::SETEQ: Opc = invTest ? Alpha::FBNE : Alpha::FBEQ; break;
660 case ISD::SETLT: Opc = invTest ? Alpha::FBGT : Alpha::FBLT; break;
661 case ISD::SETLE: Opc = invTest ? Alpha::FBGE : Alpha::FBLE; break;
662 case ISD::SETGT: Opc = invTest ? Alpha::FBLT : Alpha::FBGT; break;
663 case ISD::SETGE: Opc = invTest ? Alpha::FBLE : Alpha::FBGE; break;
664 case ISD::SETNE: Opc = invTest ? Alpha::FBEQ : Alpha::FBNE; break;
666 BuildMI(BB, Opc, 2).addReg(Tmp3).addMBB(Dest);
669 abort(); //Should never be reached
671 //Giveup and do the stupid thing
672 unsigned Tmp1 = SelectExpr(CC);
673 BuildMI(BB, Alpha::BNE, 2).addReg(Tmp1).addMBB(Dest);
676 abort(); //Should never be reached
679 unsigned AlphaISel::SelectExpr(SDOperand N) {
681 unsigned Tmp1, Tmp2 = 0, Tmp3;
683 unsigned opcode = N.getOpcode();
687 SDNode *Node = N.Val;
688 MVT::ValueType DestType = N.getValueType();
689 bool isFP = DestType == MVT::f64 || DestType == MVT::f32;
691 unsigned &Reg = ExprMap[N];
694 if (N.getOpcode() != ISD::CALL && N.getOpcode() != ISD::TAILCALL)
695 Reg = Result = (N.getValueType() != MVT::Other) ?
696 MakeReg(N.getValueType()) : notIn;
698 // If this is a call instruction, make sure to prepare ALL of the result
699 // values as well as the chain.
700 if (Node->getNumValues() == 1)
701 Reg = Result = notIn; // Void call, just a chain.
703 Result = MakeReg(Node->getValueType(0));
704 ExprMap[N.getValue(0)] = Result;
705 for (unsigned i = 1, e = N.Val->getNumValues()-1; i != e; ++i)
706 ExprMap[N.getValue(i)] = MakeReg(Node->getValueType(i));
707 ExprMap[SDOperand(Node, Node->getNumValues()-1)] = notIn;
714 assert(0 && "Node not handled!\n");
719 Opc = opcode == ISD::CTPOP ? Alpha::CTPOP :
720 (opcode == ISD::CTTZ ? Alpha::CTTZ : Alpha::CTLZ);
721 Tmp1 = SelectExpr(N.getOperand(0));
722 BuildMI(BB, Opc, 1, Result).addReg(Alpha::R31).addReg(Tmp1);
726 Tmp1 = SelectExpr(N.getOperand(0));
727 Tmp2 = SelectExpr(N.getOperand(1));
728 BuildMI(BB, Alpha::UMULH, 2, Result).addReg(Tmp1).addReg(Tmp2);
732 //MULHU - Ra<63>*Rb - Rb<63>*Ra
733 Tmp1 = SelectExpr(N.getOperand(0));
734 Tmp2 = SelectExpr(N.getOperand(1));
735 Tmp3 = MakeReg(MVT::i64);
736 BuildMI(BB, Alpha::UMULH, 2, Tmp3).addReg(Tmp1).addReg(Tmp2);
737 unsigned V1 = MakeReg(MVT::i64);
738 unsigned V2 = MakeReg(MVT::i64);
739 BuildMI(BB, Alpha::CMOVGE, 3, V1).addReg(Tmp2).addReg(Alpha::R31)
741 BuildMI(BB, Alpha::CMOVGE, 3, V2).addReg(Tmp1).addReg(Alpha::R31)
743 unsigned IRes = MakeReg(MVT::i64);
744 BuildMI(BB, Alpha::SUBQ, 2, IRes).addReg(Tmp3).addReg(V1);
745 BuildMI(BB, Alpha::SUBQ, 2, Result).addReg(IRes).addReg(V2);
749 BuildMI(BB, Alpha::IDEF, 0, Result);
753 case ISD::DYNAMIC_STACKALLOC:
754 // Generate both result values.
756 ExprMap[N.getValue(1)] = notIn; // Generate the token
758 Result = ExprMap[N.getValue(0)] = MakeReg(N.getValue(0).getValueType());
760 // FIXME: We are currently ignoring the requested alignment for handling
761 // greater than the stack alignment. This will need to be revisited at some
762 // point. Align = N.getOperand(2);
764 if (!isa<ConstantSDNode>(N.getOperand(2)) ||
765 cast<ConstantSDNode>(N.getOperand(2))->getValue() != 0) {
766 std::cerr << "Cannot allocate stack object with greater alignment than"
767 << " the stack alignment yet!";
771 Select(N.getOperand(0));
772 if (isSIntImmediateBounded(N.getOperand(1), SImm, 0, 32767))
773 BuildMI(BB, Alpha::LDA, 2, Alpha::R30).addImm(-SImm).addReg(Alpha::R30);
775 Tmp1 = SelectExpr(N.getOperand(1));
776 // Subtract size from stack pointer, thereby allocating some space.
777 BuildMI(BB, Alpha::SUBQ, 2, Alpha::R30).addReg(Alpha::R30).addReg(Tmp1);
780 // Put a pointer to the space into the result register, by copying the stack
782 BuildMI(BB, Alpha::BIS, 2, Result).addReg(Alpha::R30).addReg(Alpha::R30);
785 case ISD::ConstantPool:
786 Tmp1 = BB->getParent()->getConstantPool()->
787 getConstantPoolIndex(cast<ConstantPoolSDNode>(N)->get());
788 AlphaLowering.restoreGP(BB);
789 Tmp2 = MakeReg(MVT::i64);
790 BuildMI(BB, Alpha::LDAHr, 2, Tmp2).addConstantPoolIndex(Tmp1)
792 BuildMI(BB, Alpha::LDAr, 2, Result).addConstantPoolIndex(Tmp1)
796 case ISD::FrameIndex:
797 BuildMI(BB, Alpha::LDA, 2, Result)
798 .addFrameIndex(cast<FrameIndexSDNode>(N)->getIndex())
807 // Make sure we generate both values.
809 ExprMap[N.getValue(1)] = notIn; // Generate the token
811 Result = ExprMap[N.getValue(0)] = MakeReg(N.getValue(0).getValueType());
813 SDOperand Chain = N.getOperand(0);
814 SDOperand Address = N.getOperand(1);
819 if (opcode == ISD::LOAD)
820 switch (Node->getValueType(0)) {
821 default: Node->dump(); assert(0 && "Bad load!");
822 case MVT::i64: Opc = Alpha::LDQ; break;
823 case MVT::f64: Opc = Alpha::LDT; break;
824 case MVT::f32: Opc = Alpha::LDS; break;
827 switch (cast<VTSDNode>(Node->getOperand(3))->getVT()) {
828 default: Node->dump(); assert(0 && "Bad sign extend!");
829 case MVT::i32: Opc = Alpha::LDL;
830 assert(opcode != ISD::ZEXTLOAD && "Not sext"); break;
831 case MVT::i16: Opc = Alpha::LDWU;
832 assert(opcode != ISD::SEXTLOAD && "Not zext"); break;
833 case MVT::i1: //FIXME: Treat i1 as i8 since there are problems otherwise
834 case MVT::i8: Opc = Alpha::LDBU;
835 assert(opcode != ISD::SEXTLOAD && "Not zext"); break;
839 if (EnableAlphaLSMark)
840 getValueInfo(dyn_cast<SrcValueSDNode>(N.getOperand(2))->getValue(),
843 GlobalAddressSDNode *GASD = dyn_cast<GlobalAddressSDNode>(Address);
844 if (GASD && !GASD->getGlobal()->isExternal()) {
845 Tmp1 = MakeReg(MVT::i64);
846 AlphaLowering.restoreGP(BB);
847 BuildMI(BB, Alpha::LDAHr, 2, Tmp1)
848 .addGlobalAddress(GASD->getGlobal()).addReg(Alpha::R29);
849 if (EnableAlphaLSMark)
850 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
852 BuildMI(BB, GetRelVersion(Opc), 2, Result)
853 .addGlobalAddress(GASD->getGlobal()).addReg(Tmp1);
854 } else if (ConstantPoolSDNode *CP =
855 dyn_cast<ConstantPoolSDNode>(Address)) {
856 unsigned CPIdx = BB->getParent()->getConstantPool()->
857 getConstantPoolIndex(CP->get());
858 AlphaLowering.restoreGP(BB);
860 Tmp1 = MakeReg(MVT::i64);
861 BuildMI(BB, Alpha::LDAHr, 2, Tmp1).addConstantPoolIndex(CPIdx)
863 if (EnableAlphaLSMark)
864 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
866 BuildMI(BB, GetRelVersion(Opc), 2, Result)
867 .addConstantPoolIndex(CPIdx).addReg(Tmp1);
868 } else if(Address.getOpcode() == ISD::FrameIndex) {
869 if (EnableAlphaLSMark)
870 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
872 BuildMI(BB, Opc, 2, Result)
873 .addFrameIndex(cast<FrameIndexSDNode>(Address)->getIndex())
877 SelectAddr(Address, Tmp1, offset);
878 if (EnableAlphaLSMark)
879 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
881 BuildMI(BB, Opc, 2, Result).addImm(offset).addReg(Tmp1);
886 case ISD::GlobalAddress:
887 AlphaLowering.restoreGP(BB);
890 Reg = Result = MakeReg(MVT::i64);
892 if (EnableAlphaLSMark)
893 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(5).addImm(0).addImm(0)
896 BuildMI(BB, Alpha::LDQl, 2, Result)
897 .addGlobalAddress(cast<GlobalAddressSDNode>(N)->getGlobal())
901 case ISD::ExternalSymbol:
902 AlphaLowering.restoreGP(BB);
905 Reg = Result = MakeReg(MVT::i64);
907 if (EnableAlphaLSMark)
908 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(5).addImm(0).addImm(0)
911 BuildMI(BB, Alpha::LDQl, 2, Result)
912 .addExternalSymbol(cast<ExternalSymbolSDNode>(N)->getSymbol())
919 Select(N.getOperand(0));
921 // The chain for this call is now lowered.
922 ExprMap[N.getValue(Node->getNumValues()-1)] = notIn;
925 std::vector<unsigned> argvregs;
926 //assert(Node->getNumOperands() < 8 && "Only 6 args supported");
927 for(int i = 2, e = Node->getNumOperands(); i < e; ++i)
928 argvregs.push_back(SelectExpr(N.getOperand(i)));
931 for(int i = 0, e = std::min(6, (int)argvregs.size()); i < e; ++i)
933 unsigned args_int[] = {Alpha::R16, Alpha::R17, Alpha::R18,
934 Alpha::R19, Alpha::R20, Alpha::R21};
935 unsigned args_float[] = {Alpha::F16, Alpha::F17, Alpha::F18,
936 Alpha::F19, Alpha::F20, Alpha::F21};
937 switch(N.getOperand(i+2).getValueType()) {
940 N.getOperand(i).Val->dump();
941 std::cerr << "Type for " << i << " is: " <<
942 N.getOperand(i+2).getValueType() << "\n";
943 assert(0 && "Unknown value type for call");
949 BuildMI(BB, Alpha::BIS, 2, args_int[i]).addReg(argvregs[i])
950 .addReg(argvregs[i]);
954 BuildMI(BB, Alpha::CPYS, 2, args_float[i]).addReg(argvregs[i])
955 .addReg(argvregs[i]);
960 for (int i = 6, e = argvregs.size(); i < e; ++i)
962 switch(N.getOperand(i+2).getValueType()) {
965 N.getOperand(i).Val->dump();
966 std::cerr << "Type for " << i << " is: " <<
967 N.getOperand(i+2).getValueType() << "\n";
968 assert(0 && "Unknown value type for call");
974 BuildMI(BB, Alpha::STQ, 3).addReg(argvregs[i]).addImm((i - 6) * 8)
978 BuildMI(BB, Alpha::STS, 3).addReg(argvregs[i]).addImm((i - 6) * 8)
982 BuildMI(BB, Alpha::STT, 3).addReg(argvregs[i]).addImm((i - 6) * 8)
987 //build the right kind of call
988 GlobalAddressSDNode *GASD = dyn_cast<GlobalAddressSDNode>(N.getOperand(1));
989 if (GASD && !GASD->getGlobal()->isExternal()) {
990 //use PC relative branch call
991 AlphaLowering.restoreGP(BB);
992 BuildMI(BB, Alpha::BSR, 1, Alpha::R26)
993 .addGlobalAddress(GASD->getGlobal(),true);
995 //no need to restore GP as we are doing an indirect call
996 Tmp1 = SelectExpr(N.getOperand(1));
997 BuildMI(BB, Alpha::BIS, 2, Alpha::R27).addReg(Tmp1).addReg(Tmp1);
998 BuildMI(BB, Alpha::JSR, 2, Alpha::R26).addReg(Alpha::R27).addImm(0);
1001 //push the result into a virtual register
1003 switch (Node->getValueType(0)) {
1004 default: Node->dump(); assert(0 && "Unknown value type for call result!");
1005 case MVT::Other: return notIn;
1011 BuildMI(BB, Alpha::BIS, 2, Result).addReg(Alpha::R0).addReg(Alpha::R0);
1015 BuildMI(BB, Alpha::CPYS, 2, Result).addReg(Alpha::F0).addReg(Alpha::F0);
1018 return Result+N.ResNo;
1021 case ISD::SIGN_EXTEND_INREG:
1023 //do SDIV opt for all levels of ints if not dividing by a constant
1024 if (EnableAlphaIDIV && N.getOperand(0).getOpcode() == ISD::SDIV
1025 && N.getOperand(0).getOperand(1).getOpcode() != ISD::Constant)
1027 unsigned Tmp4 = MakeReg(MVT::f64);
1028 unsigned Tmp5 = MakeReg(MVT::f64);
1029 unsigned Tmp6 = MakeReg(MVT::f64);
1030 unsigned Tmp7 = MakeReg(MVT::f64);
1031 unsigned Tmp8 = MakeReg(MVT::f64);
1032 unsigned Tmp9 = MakeReg(MVT::f64);
1034 Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
1035 Tmp2 = SelectExpr(N.getOperand(0).getOperand(1));
1036 MoveInt2FP(Tmp1, Tmp4, true);
1037 MoveInt2FP(Tmp2, Tmp5, true);
1038 BuildMI(BB, Alpha::CVTQT, 1, Tmp6).addReg(Alpha::F31).addReg(Tmp4);
1039 BuildMI(BB, Alpha::CVTQT, 1, Tmp7).addReg(Alpha::F31).addReg(Tmp5);
1040 BuildMI(BB, Alpha::DIVT, 2, Tmp8).addReg(Tmp6).addReg(Tmp7);
1041 BuildMI(BB, Alpha::CVTTQ, 1, Tmp9).addReg(Alpha::F31).addReg(Tmp8);
1042 MoveFP2Int(Tmp9, Result, true);
1046 //Alpha has instructions for a bunch of signed 32 bit stuff
1047 if(cast<VTSDNode>(Node->getOperand(1))->getVT() == MVT::i32) {
1048 switch (N.getOperand(0).getOpcode()) {
1053 bool isAdd = N.getOperand(0).getOpcode() == ISD::ADD;
1054 bool isMul = N.getOperand(0).getOpcode() == ISD::MUL;
1055 //FIXME: first check for Scaled Adds and Subs!
1056 if(!isMul && N.getOperand(0).getOperand(0).getOpcode() == ISD::SHL &&
1057 isSIntImmediateBounded(N.getOperand(0).getOperand(0).getOperand(1), SImm, 2, 3))
1059 bool use4 = SImm == 2;
1060 Tmp1 = SelectExpr(N.getOperand(0).getOperand(0).getOperand(0));
1061 Tmp2 = SelectExpr(N.getOperand(0).getOperand(1));
1062 BuildMI(BB, isAdd?(use4?Alpha::S4ADDL:Alpha::S8ADDL):(use4?Alpha::S4SUBL:Alpha::S8SUBL),
1063 2,Result).addReg(Tmp1).addReg(Tmp2);
1065 else if(isAdd && N.getOperand(0).getOperand(1).getOpcode() == ISD::SHL &&
1066 isSIntImmediateBounded(N.getOperand(0).getOperand(1).getOperand(1), SImm, 2, 3))
1068 bool use4 = SImm == 2;
1069 Tmp1 = SelectExpr(N.getOperand(0).getOperand(1).getOperand(0));
1070 Tmp2 = SelectExpr(N.getOperand(0).getOperand(0));
1071 BuildMI(BB, use4?Alpha::S4ADDL:Alpha::S8ADDL, 2,Result).addReg(Tmp1).addReg(Tmp2);
1073 else if(isSIntImmediateBounded(N.getOperand(0).getOperand(1), SImm, 0, 255))
1074 { //Normal imm add/sub
1075 Opc = isAdd ? Alpha::ADDLi : (isMul ? Alpha::MULLi : Alpha::SUBLi);
1076 Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
1077 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addImm(SImm);
1079 else if(!isMul && isSIntImmediate(N.getOperand(0).getOperand(1), SImm) &&
1080 (((SImm << 32) >> 32) >= -255) && (((SImm << 32) >> 32) <= 0))
1081 { //handle canonicalization
1082 Opc = isAdd ? Alpha::SUBLi : Alpha::ADDLi;
1083 Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
1084 SImm = 0 - ((SImm << 32) >> 32);
1085 assert(SImm >= 0 && SImm <= 255);
1086 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addImm(SImm);
1090 Opc = isAdd ? Alpha::ADDL : (isMul ? Alpha::MULL : Alpha::SUBL);
1091 Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
1092 Tmp2 = SelectExpr(N.getOperand(0).getOperand(1));
1093 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1097 default: break; //Fall Though;
1099 } //Every thing else fall though too, including unhandled opcodes above
1100 Tmp1 = SelectExpr(N.getOperand(0));
1101 //std::cerr << "SrcT: " << MVN->getExtraValueType() << "\n";
1102 switch(cast<VTSDNode>(Node->getOperand(1))->getVT()) {
1105 assert(0 && "Sign Extend InReg not there yet");
1109 BuildMI(BB, Alpha::ADDLi, 2, Result).addReg(Tmp1).addImm(0);
1113 BuildMI(BB, Alpha::SEXTW, 1, Result).addReg(Alpha::R31).addReg(Tmp1);
1116 BuildMI(BB, Alpha::SEXTB, 1, Result).addReg(Alpha::R31).addReg(Tmp1);
1119 Tmp2 = MakeReg(MVT::i64);
1120 BuildMI(BB, Alpha::ANDi, 2, Tmp2).addReg(Tmp1).addImm(1);
1121 BuildMI(BB, Alpha::SUBQ, 2, Result).addReg(Alpha::R31).addReg(Tmp2);
1129 ISD::CondCode CC = cast<CondCodeSDNode>(N.getOperand(2))->get();
1130 if (MVT::isInteger(N.getOperand(0).getValueType())) {
1131 bool isConst = false;
1134 //Tmp1 = SelectExpr(N.getOperand(0));
1135 if(isSIntImmediate(N.getOperand(1), SImm) && SImm <= 255 && SImm >= 0)
1139 default: Node->dump(); assert(0 && "Unknown integer comparison!");
1141 Opc = isConst ? Alpha::CMPEQi : Alpha::CMPEQ; dir=1; break;
1143 Opc = isConst ? Alpha::CMPLTi : Alpha::CMPLT; dir = 1; break;
1145 Opc = isConst ? Alpha::CMPLEi : Alpha::CMPLE; dir = 1; break;
1146 case ISD::SETGT: Opc = Alpha::CMPLT; dir = 2; break;
1147 case ISD::SETGE: Opc = Alpha::CMPLE; dir = 2; break;
1149 Opc = isConst ? Alpha::CMPULTi : Alpha::CMPULT; dir = 1; break;
1150 case ISD::SETUGT: Opc = Alpha::CMPULT; dir = 2; break;
1152 Opc = isConst ? Alpha::CMPULEi : Alpha::CMPULE; dir = 1; break;
1153 case ISD::SETUGE: Opc = Alpha::CMPULE; dir = 2; break;
1154 case ISD::SETNE: {//Handle this one special
1155 //std::cerr << "Alpha does not have a setne.\n";
1157 Tmp1 = SelectExpr(N.getOperand(0));
1158 Tmp2 = SelectExpr(N.getOperand(1));
1159 Tmp3 = MakeReg(MVT::i64);
1160 BuildMI(BB, Alpha::CMPEQ, 2, Tmp3).addReg(Tmp1).addReg(Tmp2);
1161 //Remeber we have the Inv for this CC
1164 BuildMI(BB, Alpha::CMPEQ, 2, Result).addReg(Alpha::R31).addReg(Tmp3);
1169 Tmp1 = SelectExpr(N.getOperand(0));
1171 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addImm(SImm);
1173 Tmp2 = SelectExpr(N.getOperand(1));
1174 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1176 } else { //if (dir == 2) {
1177 Tmp1 = SelectExpr(N.getOperand(1));
1178 Tmp2 = SelectExpr(N.getOperand(0));
1179 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1183 Tmp1 = MakeReg(MVT::f64);
1184 bool inv = SelectFPSetCC(N, Tmp1);
1186 //now arrange for Result (int) to have a 1 or 0
1187 Tmp2 = MakeReg(MVT::i64);
1188 BuildMI(BB, Alpha::ADDQi, 2, Tmp2).addReg(Alpha::R31).addImm(1);
1189 Opc = inv?Alpha::CMOVNEi_FP:Alpha::CMOVEQi_FP;
1190 BuildMI(BB, Opc, 3, Result).addReg(Tmp2).addImm(0).addReg(Tmp1);
1195 case ISD::CopyFromReg:
1199 // Make sure we generate both values.
1200 if (Result != notIn)
1201 ExprMap[N.getValue(1)] = notIn; // Generate the token
1203 Result = ExprMap[N.getValue(0)] = MakeReg(N.getValue(0).getValueType());
1205 SDOperand Chain = N.getOperand(0);
1208 unsigned r = cast<RegisterSDNode>(Node->getOperand(1))->getReg();
1209 //std::cerr << "CopyFromReg " << Result << " = " << r << "\n";
1210 if (MVT::isFloatingPoint(N.getValue(0).getValueType()))
1211 BuildMI(BB, Alpha::CPYS, 2, Result).addReg(r).addReg(r);
1213 BuildMI(BB, Alpha::BIS, 2, Result).addReg(r).addReg(r);
1217 //Most of the plain arithmetic and logic share the same form, and the same
1218 //constant immediate test
1221 if (isSIntImmediate(N.getOperand(1), SImm) && SImm == -1) {
1222 Tmp1 = SelectExpr(N.getOperand(0));
1223 BuildMI(BB, Alpha::ORNOT, 2, Result).addReg(Alpha::R31).addReg(Tmp1);
1229 if (opcode == ISD::AND && isUIntImmediate(N.getOperand(1), UImm))
1231 unsigned int build = 0;
1232 for(int i = 0; i < 8; ++i)
1234 if ((UImm & 0x00FF) == 0x00FF)
1236 else if ((UImm & 0x00FF) != 0)
1237 { build = 0; break; }
1242 Tmp1 = SelectExpr(N.getOperand(0));
1243 BuildMI(BB, Alpha::ZAPNOTi, 2, Result).addReg(Tmp1).addImm(build);
1248 //Check operand(0) == Not
1249 if (N.getOperand(0).getOpcode() == ISD::XOR &&
1250 isSIntImmediate(N.getOperand(0).getOperand(1), SImm) && SImm == -1) {
1252 case ISD::AND: Opc = Alpha::BIC; break;
1253 case ISD::OR: Opc = Alpha::ORNOT; break;
1254 case ISD::XOR: Opc = Alpha::EQV; break;
1256 Tmp1 = SelectExpr(N.getOperand(1));
1257 Tmp2 = SelectExpr(N.getOperand(0).getOperand(0));
1258 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1261 //Check operand(1) == Not
1262 if (N.getOperand(1).getOpcode() == ISD::XOR &&
1263 isSIntImmediate(N.getOperand(1).getOperand(1), SImm) && SImm == -1) {
1265 case ISD::AND: Opc = Alpha::BIC; break;
1266 case ISD::OR: Opc = Alpha::ORNOT; break;
1267 case ISD::XOR: Opc = Alpha::EQV; break;
1269 Tmp1 = SelectExpr(N.getOperand(0));
1270 Tmp2 = SelectExpr(N.getOperand(1).getOperand(0));
1271 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1279 if(isSIntImmediateBounded(N.getOperand(1), SImm, 0, 255)) {
1281 case ISD::AND: Opc = Alpha::ANDi; break;
1282 case ISD::OR: Opc = Alpha::BISi; break;
1283 case ISD::XOR: Opc = Alpha::XORi; break;
1284 case ISD::SHL: Opc = Alpha::SLi; break;
1285 case ISD::SRL: Opc = Alpha::SRLi; break;
1286 case ISD::SRA: Opc = Alpha::SRAi; break;
1287 case ISD::MUL: Opc = Alpha::MULQi; break;
1289 Tmp1 = SelectExpr(N.getOperand(0));
1290 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addImm(SImm);
1293 case ISD::AND: Opc = Alpha::AND; break;
1294 case ISD::OR: Opc = Alpha::BIS; break;
1295 case ISD::XOR: Opc = Alpha::XOR; break;
1296 case ISD::SHL: Opc = Alpha::SL; break;
1297 case ISD::SRL: Opc = Alpha::SRL; break;
1298 case ISD::SRA: Opc = Alpha::SRA; break;
1300 Opc = isFP ? (DestType == MVT::f64 ? Alpha::MULT : Alpha::MULS)
1304 Tmp1 = SelectExpr(N.getOperand(0));
1305 Tmp2 = SelectExpr(N.getOperand(1));
1306 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1313 ConstantFPSDNode *CN;
1314 if (opcode == ISD::ADD)
1315 Opc = DestType == MVT::f64 ? Alpha::ADDT : Alpha::ADDS;
1317 Opc = DestType == MVT::f64 ? Alpha::SUBT : Alpha::SUBS;
1318 if (opcode == ISD::SUB
1319 && (CN = dyn_cast<ConstantFPSDNode>(N.getOperand(0)))
1320 && (CN->isExactlyValue(+0.0) || CN->isExactlyValue(-0.0)))
1322 Tmp2 = SelectExpr(N.getOperand(1));
1323 BuildMI(BB, Alpha::CPYSN, 2, Result).addReg(Tmp2).addReg(Tmp2);
1325 Tmp1 = SelectExpr(N.getOperand(0));
1326 Tmp2 = SelectExpr(N.getOperand(1));
1327 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1331 bool isAdd = opcode == ISD::ADD;
1333 //first check for Scaled Adds and Subs!
1334 //Valid for add and sub
1335 if(N.getOperand(0).getOpcode() == ISD::SHL &&
1336 isSIntImmediate(N.getOperand(0).getOperand(1), SImm) &&
1337 (SImm == 2 || SImm == 3)) {
1338 bool use4 = SImm == 2;
1339 Tmp2 = SelectExpr(N.getOperand(0).getOperand(0));
1340 if (isSIntImmediateBounded(N.getOperand(1), SImm, 0, 255))
1341 BuildMI(BB, isAdd?(use4?Alpha::S4ADDQi:Alpha::S8ADDQi):(use4?Alpha::S4SUBQi:Alpha::S8SUBQi),
1342 2, Result).addReg(Tmp2).addImm(SImm);
1344 Tmp1 = SelectExpr(N.getOperand(1));
1345 BuildMI(BB, isAdd?(use4?Alpha::S4ADDQi:Alpha::S8ADDQi):(use4?Alpha::S4SUBQi:Alpha::S8SUBQi),
1346 2, Result).addReg(Tmp2).addReg(Tmp1);
1349 //Position prevents subs
1350 else if(N.getOperand(1).getOpcode() == ISD::SHL && isAdd &&
1351 isSIntImmediate(N.getOperand(1).getOperand(1), SImm) &&
1352 (SImm == 2 || SImm == 3)) {
1353 bool use4 = SImm == 2;
1354 Tmp2 = SelectExpr(N.getOperand(1).getOperand(0));
1355 if (isSIntImmediateBounded(N.getOperand(0), SImm, 0, 255))
1356 BuildMI(BB, use4?Alpha::S4ADDQi:Alpha::S8ADDQi, 2, Result).addReg(Tmp2).addImm(SImm);
1358 Tmp1 = SelectExpr(N.getOperand(0));
1359 BuildMI(BB, use4?Alpha::S4ADDQ:Alpha::S8ADDQ, 2, Result).addReg(Tmp2).addReg(Tmp1);
1363 else if(isSIntImmediateBounded(N.getOperand(1), SImm, 0, 255))
1364 { //Normal imm add/sub
1365 Opc = isAdd ? Alpha::ADDQi : Alpha::SUBQi;
1366 Tmp1 = SelectExpr(N.getOperand(0));
1367 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addImm(SImm);
1369 else if(isSIntImmediateBounded(N.getOperand(1), SImm, -255, 0))
1370 { //inverted imm add/sub
1371 Opc = isAdd ? Alpha::SUBQi : Alpha::ADDQi;
1372 Tmp1 = SelectExpr(N.getOperand(0));
1373 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addImm(-SImm);
1376 else if(isSIntImmediateBounded(N.getOperand(1), SImm, -32767, 32767))
1378 Tmp1 = SelectExpr(N.getOperand(0));
1381 BuildMI(BB, Alpha::LDA, 2, Result).addImm(SImm).addReg(Tmp1);
1383 //give up and do the operation
1386 Opc = isAdd ? Alpha::ADDQ : Alpha::SUBQ;
1387 Tmp1 = SelectExpr(N.getOperand(0));
1388 Tmp2 = SelectExpr(N.getOperand(1));
1389 BuildMI(BB, Opc, 2, Result).addReg(Tmp1).addReg(Tmp2);
1396 Tmp1 = SelectExpr(N.getOperand(0));
1397 Tmp2 = SelectExpr(N.getOperand(1));
1398 BuildMI(BB, DestType == MVT::f64 ? Alpha::DIVT : Alpha::DIVS, 2, Result)
1399 .addReg(Tmp1).addReg(Tmp2);
1402 //check if we can convert into a shift!
1403 if (isSIntImmediate(N.getOperand(1), SImm) &&
1404 SImm != 0 && isPowerOf2_64(llabs(SImm))) {
1405 unsigned k = Log2_64(llabs(SImm));
1406 Tmp1 = SelectExpr(N.getOperand(0));
1411 Tmp2 = MakeReg(MVT::i64);
1412 BuildMI(BB, Alpha::SRAi, 2, Tmp2).addReg(Tmp1).addImm(k - 1);
1414 Tmp3 = MakeReg(MVT::i64);
1415 BuildMI(BB, Alpha::SRLi, 2, Tmp3).addReg(Tmp2).addImm(64-k);
1416 unsigned Tmp4 = MakeReg(MVT::i64);
1417 BuildMI(BB, Alpha::ADDQ, 2, Tmp4).addReg(Tmp3).addReg(Tmp1);
1419 BuildMI(BB, Alpha::SRAi, 2, Result).addReg(Tmp4).addImm(k);
1422 unsigned Tmp5 = MakeReg(MVT::i64);
1423 BuildMI(BB, Alpha::SRAi, 2, Tmp5).addReg(Tmp4).addImm(k);
1424 BuildMI(BB, Alpha::SUBQ, 2, Result).addReg(Alpha::R31).addReg(Tmp5);
1433 if (isSIntImmediate(N.getOperand(1), SImm) && (SImm >= 2 || SImm <= -2))
1435 // If this is a divide by constant, we can emit code using some magic
1436 // constants to implement it as a multiply instead.
1438 if (opcode == ISD::SDIV)
1439 return SelectExpr(BuildSDIVSequence(N));
1441 return SelectExpr(BuildUDIVSequence(N));
1447 const char* opstr = 0;
1449 case ISD::UREM: opstr = "__remqu"; break;
1450 case ISD::SREM: opstr = "__remq"; break;
1451 case ISD::UDIV: opstr = "__divqu"; break;
1452 case ISD::SDIV: opstr = "__divq"; break;
1454 Tmp1 = SelectExpr(N.getOperand(0));
1455 Tmp2 = SelectExpr(N.getOperand(1));
1457 ISelDAG->getExternalSymbol(opstr, AlphaLowering.getPointerTy());
1458 Tmp3 = SelectExpr(Addr);
1459 //set up regs explicitly (helps Reg alloc)
1460 BuildMI(BB, Alpha::BIS, 2, Alpha::R24).addReg(Tmp1).addReg(Tmp1);
1461 BuildMI(BB, Alpha::BIS, 2, Alpha::R25).addReg(Tmp2).addReg(Tmp2);
1462 BuildMI(BB, Alpha::BIS, 2, Alpha::R27).addReg(Tmp3).addReg(Tmp3);
1463 BuildMI(BB, Alpha::JSRs, 2, Alpha::R23).addReg(Alpha::R27).addImm(0);
1464 BuildMI(BB, Alpha::BIS, 2, Result).addReg(Alpha::R27).addReg(Alpha::R27);
1468 case ISD::FP_TO_UINT:
1469 case ISD::FP_TO_SINT:
1471 assert (DestType == MVT::i64 && "only quads can be loaded to");
1472 MVT::ValueType SrcType = N.getOperand(0).getValueType();
1473 assert (SrcType == MVT::f32 || SrcType == MVT::f64);
1474 Tmp1 = SelectExpr(N.getOperand(0)); // Get the operand register
1475 if (SrcType == MVT::f32)
1477 Tmp2 = MakeReg(MVT::f64);
1478 BuildMI(BB, Alpha::CVTST, 1, Tmp2).addReg(Alpha::F31).addReg(Tmp1);
1481 Tmp2 = MakeReg(MVT::f64);
1482 BuildMI(BB, Alpha::CVTTQ, 1, Tmp2).addReg(Alpha::F31).addReg(Tmp1);
1483 MoveFP2Int(Tmp2, Result, true);
1490 //Tmp1 = SelectExpr(N.getOperand(0)); //Cond
1491 unsigned TV = SelectExpr(N.getOperand(1)); //Use if TRUE
1492 unsigned FV = SelectExpr(N.getOperand(2)); //Use if FALSE
1494 SDOperand CC = N.getOperand(0);
1496 if (CC.getOpcode() == ISD::SETCC &&
1497 !MVT::isInteger(CC.getOperand(0).getValueType())) {
1498 //FP Setcc -> Select yay!
1501 //for a cmp b: c = a - b;
1506 bool invTest = false;
1509 ConstantFPSDNode *CN;
1510 if ((CN = dyn_cast<ConstantFPSDNode>(CC.getOperand(1)))
1511 && (CN->isExactlyValue(+0.0) || CN->isExactlyValue(-0.0)))
1512 Tmp3 = SelectExpr(CC.getOperand(0));
1513 else if ((CN = dyn_cast<ConstantFPSDNode>(CC.getOperand(0)))
1514 && (CN->isExactlyValue(+0.0) || CN->isExactlyValue(-0.0)))
1516 Tmp3 = SelectExpr(CC.getOperand(1));
1521 unsigned Tmp1 = SelectExpr(CC.getOperand(0));
1522 unsigned Tmp2 = SelectExpr(CC.getOperand(1));
1523 bool isD = CC.getOperand(0).getValueType() == MVT::f64;
1524 Tmp3 = MakeReg(isD ? MVT::f64 : MVT::f32);
1525 BuildMI(BB, isD ? Alpha::SUBT : Alpha::SUBS, 2, Tmp3)
1526 .addReg(Tmp1).addReg(Tmp2);
1529 switch (cast<CondCodeSDNode>(CC.getOperand(2))->get()) {
1530 default: CC.Val->dump(); assert(0 && "Unknown FP comparison!");
1531 case ISD::SETEQ: Opc = invTest ? Alpha::FCMOVNE : Alpha::FCMOVEQ; break;
1532 case ISD::SETLT: Opc = invTest ? Alpha::FCMOVGT : Alpha::FCMOVLT; break;
1533 case ISD::SETLE: Opc = invTest ? Alpha::FCMOVGE : Alpha::FCMOVLE; break;
1534 case ISD::SETGT: Opc = invTest ? Alpha::FCMOVLT : Alpha::FCMOVGT; break;
1535 case ISD::SETGE: Opc = invTest ? Alpha::FCMOVLE : Alpha::FCMOVGE; break;
1536 case ISD::SETNE: Opc = invTest ? Alpha::FCMOVEQ : Alpha::FCMOVNE; break;
1538 BuildMI(BB, Opc, 3, Result).addReg(FV).addReg(TV).addReg(Tmp3);
1543 Tmp1 = SelectExpr(N.getOperand(0)); //Cond
1544 BuildMI(BB, Alpha::FCMOVEQ_INT, 3, Result).addReg(TV).addReg(FV)
1546 // // Spill the cond to memory and reload it from there.
1547 // unsigned Tmp4 = MakeReg(MVT::f64);
1548 // MoveIntFP(Tmp1, Tmp4, true);
1549 // //now ideally, we don't have to do anything to the flag...
1550 // // Get the condition into the zero flag.
1551 // BuildMI(BB, Alpha::FCMOVEQ, 3, Result).addReg(TV).addReg(FV).addReg(Tmp4);
1555 //FIXME: look at parent to decide if intCC can be folded, or if setCC(FP)
1556 //and can save stack use
1557 //Tmp1 = SelectExpr(N.getOperand(0)); //Cond
1558 //Tmp2 = SelectExpr(N.getOperand(1)); //Use if TRUE
1559 //Tmp3 = SelectExpr(N.getOperand(2)); //Use if FALSE
1560 // Get the condition into the zero flag.
1561 //BuildMI(BB, Alpha::CMOVEQ, 2, Result).addReg(Tmp2).addReg(Tmp3).addReg(Tmp1);
1563 SDOperand CC = N.getOperand(0);
1565 if (CC.getOpcode() == ISD::SETCC &&
1566 !MVT::isInteger(CC.getOperand(0).getValueType()))
1567 { //FP Setcc -> Int Select
1568 Tmp1 = MakeReg(MVT::f64);
1569 Tmp2 = SelectExpr(N.getOperand(1)); //Use if TRUE
1570 Tmp3 = SelectExpr(N.getOperand(2)); //Use if FALSE
1571 bool inv = SelectFPSetCC(CC, Tmp1);
1572 BuildMI(BB, inv?Alpha::CMOVNE_FP:Alpha::CMOVEQ_FP, 2, Result)
1573 .addReg(Tmp2).addReg(Tmp3).addReg(Tmp1);
1576 if (CC.getOpcode() == ISD::SETCC) {
1577 //Int SetCC -> Select
1578 //Dropping the CC is only useful if we are comparing to 0
1579 if(isSIntImmediateBounded(CC.getOperand(1), SImm, 0, 0)) {
1580 //figure out a few things
1581 bool useImm = isSIntImmediateBounded(N.getOperand(2), SImm, 0, 255);
1584 ISD::CondCode cCode= cast<CondCodeSDNode>(CC.getOperand(2))->get();
1585 if (useImm) //Invert sense to get Imm field right
1586 cCode = ISD::getSetCCInverse(cCode, true);
1590 default: CC.Val->dump(); assert(0 && "Unknown integer comparison!");
1591 case ISD::SETEQ: Opc = useImm?Alpha::CMOVEQi:Alpha::CMOVEQ; break;
1592 case ISD::SETLT: Opc = useImm?Alpha::CMOVLTi:Alpha::CMOVLT; break;
1593 case ISD::SETLE: Opc = useImm?Alpha::CMOVLEi:Alpha::CMOVLE; break;
1594 case ISD::SETGT: Opc = useImm?Alpha::CMOVGTi:Alpha::CMOVGT; break;
1595 case ISD::SETGE: Opc = useImm?Alpha::CMOVGEi:Alpha::CMOVGE; break;
1596 case ISD::SETULT: assert(0 && "unsigned < 0 is never true"); break;
1597 case ISD::SETUGT: Opc = useImm?Alpha::CMOVNEi:Alpha::CMOVNE; break;
1598 //Technically you could have this CC
1599 case ISD::SETULE: Opc = useImm?Alpha::CMOVEQi:Alpha::CMOVEQ; break;
1600 case ISD::SETUGE: assert(0 && "unsgined >= 0 is always true"); break;
1601 case ISD::SETNE: Opc = useImm?Alpha::CMOVNEi:Alpha::CMOVNE; break;
1603 Tmp1 = SelectExpr(CC.getOperand(0)); //Cond
1606 Tmp3 = SelectExpr(N.getOperand(1)); //Use if FALSE
1607 BuildMI(BB, Opc, 2, Result).addReg(Tmp3).addImm(SImm).addReg(Tmp1);
1609 Tmp2 = SelectExpr(N.getOperand(1)); //Use if TRUE
1610 Tmp3 = SelectExpr(N.getOperand(2)); //Use if FALSE
1611 BuildMI(BB, Opc, 2, Result).addReg(Tmp3).addReg(Tmp2).addReg(Tmp1);
1615 //Otherwise, fall though
1617 Tmp1 = SelectExpr(N.getOperand(0)); //Cond
1618 Tmp2 = SelectExpr(N.getOperand(1)); //Use if TRUE
1619 Tmp3 = SelectExpr(N.getOperand(2)); //Use if FALSE
1620 BuildMI(BB, Alpha::CMOVEQ, 2, Result).addReg(Tmp2).addReg(Tmp3)
1628 int64_t val = (int64_t)cast<ConstantSDNode>(N)->getValue();
1629 int zero_extend_top = 0;
1630 if (val > 0 && (val & 0xFFFFFFFF00000000ULL) == 0 &&
1631 ((int32_t)val < 0)) {
1632 //try a small load and zero extend
1634 zero_extend_top = 15;
1637 if (val <= IMM_HIGH && val >= IMM_LOW) {
1638 if(!zero_extend_top)
1639 BuildMI(BB, Alpha::LDA, 2, Result).addImm(val).addReg(Alpha::R31);
1641 Tmp1 = MakeReg(MVT::i64);
1642 BuildMI(BB, Alpha::LDA, 2, Tmp1).addImm(val).addReg(Alpha::R31);
1643 BuildMI(BB, Alpha::ZAPNOT, 2, Result).addReg(Tmp1).addImm(zero_extend_top);
1646 else if (val <= (int64_t)IMM_HIGH +(int64_t)IMM_HIGH* (int64_t)IMM_MULT &&
1647 val >= (int64_t)IMM_LOW + (int64_t)IMM_LOW * (int64_t)IMM_MULT) {
1648 Tmp1 = MakeReg(MVT::i64);
1649 BuildMI(BB, Alpha::LDAH, 2, Tmp1).addImm(getUpper16(val))
1650 .addReg(Alpha::R31);
1651 if (!zero_extend_top)
1652 BuildMI(BB, Alpha::LDA, 2, Result).addImm(getLower16(val)).addReg(Tmp1);
1654 Tmp3 = MakeReg(MVT::i64);
1655 BuildMI(BB, Alpha::LDA, 2, Tmp3).addImm(getLower16(val)).addReg(Tmp1);
1656 BuildMI(BB, Alpha::ZAPNOT, 2, Result).addReg(Tmp3).addImm(zero_extend_top);
1660 //re-get the val since we are going to mem anyway
1661 val = (int64_t)cast<ConstantSDNode>(N)->getValue();
1662 MachineConstantPool *CP = BB->getParent()->getConstantPool();
1664 ConstantUInt::get(Type::getPrimitiveType(Type::ULongTyID) , val);
1665 unsigned CPI = CP->getConstantPoolIndex(C);
1666 AlphaLowering.restoreGP(BB);
1668 Tmp1 = MakeReg(MVT::i64);
1669 BuildMI(BB, Alpha::LDAHr, 2, Tmp1).addConstantPoolIndex(CPI)
1670 .addReg(Alpha::R29);
1671 if (EnableAlphaLSMark)
1672 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(5).addImm(0).addImm(0)
1674 BuildMI(BB, Alpha::LDQr, 2, Result).addConstantPoolIndex(CPI)
1680 if(ISD::FABS == N.getOperand(0).getOpcode())
1682 Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
1683 BuildMI(BB, Alpha::CPYSN, 2, Result).addReg(Alpha::F31).addReg(Tmp1);
1685 Tmp1 = SelectExpr(N.getOperand(0));
1686 BuildMI(BB, Alpha::CPYSN, 2, Result).addReg(Tmp1).addReg(Tmp1);
1691 Tmp1 = SelectExpr(N.getOperand(0));
1692 BuildMI(BB, Alpha::CPYS, 2, Result).addReg(Alpha::F31).addReg(Tmp1);
1696 assert (DestType == MVT::f32 &&
1697 N.getOperand(0).getValueType() == MVT::f64 &&
1698 "only f64 to f32 conversion supported here");
1699 Tmp1 = SelectExpr(N.getOperand(0));
1700 BuildMI(BB, Alpha::CVTTS, 1, Result).addReg(Alpha::F31).addReg(Tmp1);
1703 case ISD::FP_EXTEND:
1704 assert (DestType == MVT::f64 &&
1705 N.getOperand(0).getValueType() == MVT::f32 &&
1706 "only f32 to f64 conversion supported here");
1707 Tmp1 = SelectExpr(N.getOperand(0));
1708 BuildMI(BB, Alpha::CVTST, 1, Result).addReg(Alpha::F31).addReg(Tmp1);
1711 case ISD::ConstantFP:
1712 if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N)) {
1713 if (CN->isExactlyValue(+0.0)) {
1714 BuildMI(BB, Alpha::CPYS, 2, Result).addReg(Alpha::F31)
1715 .addReg(Alpha::F31);
1716 } else if ( CN->isExactlyValue(-0.0)) {
1717 BuildMI(BB, Alpha::CPYSN, 2, Result).addReg(Alpha::F31)
1718 .addReg(Alpha::F31);
1725 case ISD::SINT_TO_FP:
1727 assert (N.getOperand(0).getValueType() == MVT::i64
1728 && "only quads can be loaded from");
1729 Tmp1 = SelectExpr(N.getOperand(0)); // Get the operand register
1730 Tmp2 = MakeReg(MVT::f64);
1731 MoveInt2FP(Tmp1, Tmp2, true);
1732 Opc = DestType == MVT::f64 ? Alpha::CVTQT : Alpha::CVTQS;
1733 BuildMI(BB, Opc, 1, Result).addReg(Alpha::F31).addReg(Tmp2);
1741 void AlphaISel::Select(SDOperand N) {
1742 unsigned Tmp1, Tmp2, Opc;
1743 unsigned opcode = N.getOpcode();
1745 if (!ExprMap.insert(std::make_pair(N, notIn)).second)
1746 return; // Already selected.
1748 SDNode *Node = N.Val;
1753 Node->dump(); std::cerr << "\n";
1754 assert(0 && "Node not handled yet!");
1762 MachineBasicBlock *Dest =
1763 cast<BasicBlockSDNode>(N.getOperand(1))->getBasicBlock();
1765 Select(N.getOperand(0));
1766 BuildMI(BB, Alpha::BR, 1, Alpha::R31).addMBB(Dest);
1770 case ISD::ImplicitDef:
1772 Select(N.getOperand(0));
1773 BuildMI(BB, Alpha::IDEF, 0,
1774 cast<RegisterSDNode>(N.getOperand(1))->getReg());
1777 case ISD::EntryToken: return; // Noop
1779 case ISD::TokenFactor:
1780 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
1781 Select(Node->getOperand(i));
1783 //N.Val->dump(); std::cerr << "\n";
1784 //assert(0 && "Node not handled yet!");
1788 case ISD::CopyToReg:
1790 Select(N.getOperand(0));
1791 Tmp1 = SelectExpr(N.getOperand(2));
1792 Tmp2 = cast<RegisterSDNode>(N.getOperand(1))->getReg();
1795 if (N.getOperand(2).getValueType() == MVT::f64 ||
1796 N.getOperand(2).getValueType() == MVT::f32)
1797 BuildMI(BB, Alpha::CPYS, 2, Tmp2).addReg(Tmp1).addReg(Tmp1);
1799 BuildMI(BB, Alpha::BIS, 2, Tmp2).addReg(Tmp1).addReg(Tmp1);
1805 switch (N.getNumOperands()) {
1807 std::cerr << N.getNumOperands() << "\n";
1808 for (unsigned i = 0; i < N.getNumOperands(); ++i)
1809 std::cerr << N.getOperand(i).getValueType() << "\n";
1811 assert(0 && "Unknown return instruction!");
1813 Select(N.getOperand(0));
1814 Tmp1 = SelectExpr(N.getOperand(1));
1815 switch (N.getOperand(1).getValueType()) {
1816 default: Node->dump();
1817 assert(0 && "All other types should have been promoted!!");
1820 BuildMI(BB, Alpha::CPYS, 2, Alpha::F0).addReg(Tmp1).addReg(Tmp1);
1824 BuildMI(BB, Alpha::BIS, 2, Alpha::R0).addReg(Tmp1).addReg(Tmp1);
1829 Select(N.getOperand(0));
1832 // Just emit a 'ret' instruction
1833 AlphaLowering.restoreRA(BB);
1834 BuildMI(BB, Alpha::RET, 2, Alpha::R31).addReg(Alpha::R26).addImm(1);
1837 case ISD::TRUNCSTORE:
1840 SDOperand Chain = N.getOperand(0);
1841 SDOperand Value = N.getOperand(1);
1842 SDOperand Address = N.getOperand(2);
1845 Tmp1 = SelectExpr(Value); //value
1847 if (opcode == ISD::STORE) {
1848 switch(Value.getValueType()) {
1849 default: assert(0 && "unknown Type in store");
1850 case MVT::i64: Opc = Alpha::STQ; break;
1851 case MVT::f64: Opc = Alpha::STT; break;
1852 case MVT::f32: Opc = Alpha::STS; break;
1854 } else { //ISD::TRUNCSTORE
1855 switch(cast<VTSDNode>(Node->getOperand(4))->getVT()) {
1856 default: assert(0 && "unknown Type in store");
1857 case MVT::i1: //FIXME: DAG does not promote this load
1858 case MVT::i8: Opc = Alpha::STB; break;
1859 case MVT::i16: Opc = Alpha::STW; break;
1860 case MVT::i32: Opc = Alpha::STL; break;
1865 if (EnableAlphaLSMark)
1866 getValueInfo(cast<SrcValueSDNode>(N.getOperand(3))->getValue(),
1869 GlobalAddressSDNode *GASD = dyn_cast<GlobalAddressSDNode>(Address);
1870 if (GASD && !GASD->getGlobal()->isExternal()) {
1871 Tmp2 = MakeReg(MVT::i64);
1872 AlphaLowering.restoreGP(BB);
1873 BuildMI(BB, Alpha::LDAHr, 2, Tmp2)
1874 .addGlobalAddress(GASD->getGlobal()).addReg(Alpha::R29);
1875 if (EnableAlphaLSMark)
1876 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
1878 BuildMI(BB, GetRelVersion(Opc), 3).addReg(Tmp1)
1879 .addGlobalAddress(GASD->getGlobal()).addReg(Tmp2);
1880 } else if(Address.getOpcode() == ISD::FrameIndex) {
1881 if (EnableAlphaLSMark)
1882 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
1884 BuildMI(BB, Opc, 3).addReg(Tmp1)
1885 .addFrameIndex(cast<FrameIndexSDNode>(Address)->getIndex())
1886 .addReg(Alpha::F31);
1889 SelectAddr(Address, Tmp2, offset);
1890 if (EnableAlphaLSMark)
1891 BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
1893 BuildMI(BB, Opc, 3).addReg(Tmp1).addImm(offset).addReg(Tmp2);
1902 case ISD::CopyFromReg:
1905 case ISD::DYNAMIC_STACKALLOC:
1910 case ISD::CALLSEQ_START:
1911 case ISD::CALLSEQ_END:
1912 Select(N.getOperand(0));
1913 Tmp1 = cast<ConstantSDNode>(N.getOperand(1))->getValue();
1915 Opc = N.getOpcode() == ISD::CALLSEQ_START ? Alpha::ADJUSTSTACKDOWN :
1916 Alpha::ADJUSTSTACKUP;
1917 BuildMI(BB, Opc, 1).addImm(Tmp1);
1921 Select(N.getOperand(0)); //Chain
1922 BuildMI(BB, Alpha::PCLABEL, 2)
1923 .addImm( cast<ConstantSDNode>(N.getOperand(1))->getValue());
1926 assert(0 && "Should not be reached!");
1930 /// createAlphaPatternInstructionSelector - This pass converts an LLVM function
1931 /// into a machine code representation using pattern matching and a machine
1932 /// description file.
1934 FunctionPass *llvm::createAlphaPatternInstructionSelector(TargetMachine &TM) {
1935 return new AlphaISel(TM);