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Use a more efficient method of creating integer and float virtual registers

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(avoids an extra level of indirection in MakeReg).

  defined MakeIntReg using RegMap->createVirtualRegister(PPC32::GPRCRegisterClass)
  defined MakeFPReg using RegMap->createVirtualRegister(PPC32::FPRCRegisterClass)

  s/MakeReg(MVT::i32)/MakeIntReg/
  s/MakeReg(MVT::f64)/MakeFPReg/

Patch by Jim Laskey!

llvm-svn: 22759
This commit is contained in:
Chris Lattner 2005-08-11 17:15:31 +00:00
parent 09c56e0432
commit 5cba0bb5bb
1 changed files with 52 additions and 44 deletions
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96
lib/Target/PowerPC/PPC32ISelPattern.cpp
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@ -563,6 +563,14 @@ public:
ISelDAG = 0;
}
// convenience functions for virtual register creation
inline unsigned MakeIntReg() {
return RegMap->createVirtualRegister(PPC32::GPRCRegisterClass);
}
inline unsigned MakeFPReg() {
return RegMap->createVirtualRegister(PPC32::FPRCRegisterClass);
}
// dag -> dag expanders for integer divide by constant
SDOperand BuildSDIVSequence(SDOperand N);
SDOperand BuildUDIVSequence(SDOperand N);
@ -917,7 +925,7 @@ unsigned ISel::getGlobalBaseReg() {
// Insert the set of GlobalBaseReg into the first MBB of the function
MachineBasicBlock &FirstMBB = BB->getParent()->front();
MachineBasicBlock::iterator MBBI = FirstMBB.begin();
GlobalBaseReg = MakeReg(MVT::i32);
GlobalBaseReg = MakeIntReg();
BuildMI(FirstMBB, MBBI, PPC::MovePCtoLR, 0, PPC::LR);
BuildMI(FirstMBB, MBBI, PPC::MFLR, 1, GlobalBaseReg).addReg(PPC::LR);
GlobalBaseInitialized = true;
@ -928,8 +936,8 @@ unsigned ISel::getGlobalBaseReg() {
/// getConstDouble - Loads a floating point value into a register, via the
/// Constant Pool. Optionally takes a register in which to load the value.
unsigned ISel::getConstDouble(double doubleVal, unsigned Result=0) {
unsigned Tmp1 = MakeReg(MVT::i32);
if (0 == Result) Result = MakeReg(MVT::f64);
unsigned Tmp1 = MakeIntReg();
if (0 == Result) Result = MakeFPReg();
MachineConstantPool *CP = BB->getParent()->getConstantPool();
ConstantFP *CFP = ConstantFP::get(Type::DoubleTy, doubleVal);
unsigned CPI = CP->getConstantPoolIndex(CFP);
@ -946,14 +954,14 @@ unsigned ISel::getConstDouble(double doubleVal, unsigned Result=0) {
/// Inv is true, then invert the result.
void ISel::MoveCRtoGPR(unsigned CCReg, ISD::CondCode CC, unsigned Result){
bool Inv;
unsigned IntCR = MakeReg(MVT::i32);
unsigned IntCR = MakeIntReg();
unsigned Idx = getCRIdxForSetCC(CC, Inv);
BuildMI(BB, PPC::MCRF, 1, PPC::CR7).addReg(CCReg);
bool GPOpt =
TLI.getTargetMachine().getSubtarget<PPCSubtarget>().isGigaProcessor();
BuildMI(BB, GPOpt ? PPC::MFOCRF : PPC::MFCR, 1, IntCR).addReg(PPC::CR7);
if (Inv) {
unsigned Tmp1 = MakeReg(MVT::i32);
unsigned Tmp1 = MakeIntReg();
BuildMI(BB, PPC::RLWINM, 4, Tmp1).addReg(IntCR).addImm(32-(3-Idx))
.addImm(31).addImm(31);
BuildMI(BB, PPC::XORI, 2, Result).addReg(Tmp1).addImm(1);
@ -1165,7 +1173,7 @@ unsigned ISel::SelectAddr(SDOperand N, unsigned& Reg, int& offset)
if(GlobalAddressSDNode *GN = dyn_cast<GlobalAddressSDNode>(N)) {
GlobalValue *GV = GN->getGlobal();
if (!GV->hasWeakLinkage() && !GV->isExternal()) {
unsigned GlobalHi = MakeReg(MVT::i32);
unsigned GlobalHi = MakeIntReg();
if (PICEnabled)
BuildMI(BB, PPC::ADDIS, 2, GlobalHi).addReg(getGlobalBaseReg())
.addGlobalAddress(GV);
@ -1260,7 +1268,7 @@ bool ISel::SelectIntImmediateExpr(SDOperand N, unsigned Result,
// register
if (CN->use_size() > 2) return false;
// need intermediate result for two instructions
Tmp = MakeReg(MVT::i32);
Tmp = MakeIntReg();
}
// get first operand
unsigned Opr0 = SelectExpr(N.getOperand(0));
@ -1363,7 +1371,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
case ISD::ConstantPool:
Tmp1 = cast<ConstantPoolSDNode>(N)->getIndex();
Tmp2 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
if (PICEnabled)
BuildMI(BB, PPC::ADDIS, 2, Tmp2).addReg(getGlobalBaseReg())
.addConstantPoolIndex(Tmp1);
@ -1379,7 +1387,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
case ISD::GlobalAddress: {
GlobalValue *GV = cast<GlobalAddressSDNode>(N)->getGlobal();
Tmp1 = MakeReg(MVT::i32);
Tmp1 = MakeIntReg();
if (PICEnabled)
BuildMI(BB, PPC::ADDIS, 2, Tmp1).addReg(getGlobalBaseReg())
.addGlobalAddress(GV);
@ -1422,7 +1430,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
}
if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Address)) {
Tmp1 = MakeReg(MVT::i32);
Tmp1 = MakeIntReg();
int CPI = CP->getIndex();
if (PICEnabled)
BuildMI(BB, PPC::ADDIS, 2, Tmp1).addReg(getGlobalBaseReg())
@ -1821,7 +1829,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
if (isIntImmediate(N.getOperand(1), Tmp3)) {
if ((signed)Tmp3 > 0 && isPowerOf2_32(Tmp3)) {
Tmp3 = Log2_32(Tmp3);
Tmp1 = MakeReg(MVT::i32);
Tmp1 = MakeIntReg();
Tmp2 = SelectExpr(N.getOperand(0));
BuildMI(BB, PPC::SRAWI, 2, Tmp1).addReg(Tmp2).addImm(Tmp3);
BuildMI(BB, PPC::ADDZE, 1, Result).addReg(Tmp1);
@ -1829,8 +1837,8 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
} else if ((signed)Tmp3 < 0 && isPowerOf2_32(-Tmp3)) {
Tmp3 = Log2_32(-Tmp3);
Tmp2 = SelectExpr(N.getOperand(0));
Tmp1 = MakeReg(MVT::i32);
unsigned Tmp4 = MakeReg(MVT::i32);
Tmp1 = MakeIntReg();
unsigned Tmp4 = MakeIntReg();
BuildMI(BB, PPC::SRAWI, 2, Tmp1).addReg(Tmp2).addImm(Tmp3);
BuildMI(BB, PPC::ADDZE, 1, Tmp4).addReg(Tmp1);
BuildMI(BB, PPC::NEG, 1, Result).addReg(Tmp4);
@ -1891,12 +1899,12 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
unsigned ShiftOpLo = SelectExpr(N.getOperand(0));
unsigned ShiftOpHi = SelectExpr(N.getOperand(1));
unsigned SHReg = FoldIfWideZeroExtend(N.getOperand(2));
Tmp1 = MakeReg(MVT::i32);
Tmp2 = MakeReg(MVT::i32);
Tmp3 = MakeReg(MVT::i32);
unsigned Tmp4 = MakeReg(MVT::i32);
unsigned Tmp5 = MakeReg(MVT::i32);
unsigned Tmp6 = MakeReg(MVT::i32);
Tmp1 = MakeIntReg();
Tmp2 = MakeIntReg();
Tmp3 = MakeIntReg();
unsigned Tmp4 = MakeIntReg();
unsigned Tmp5 = MakeIntReg();
unsigned Tmp6 = MakeIntReg();
BuildMI(BB, PPC::SUBFIC, 2, Tmp1).addReg(SHReg).addSImm(32);
if (ISD::SHL_PARTS == opcode) {
BuildMI(BB, PPC::SLW, 2, Tmp2).addReg(ShiftOpHi).addReg(SHReg);
@ -1933,7 +1941,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
BuildMI(BB, PPC::BLE, 2).addReg(PPC::CR0).addMBB(PhiMBB);
// Select correct least significant half if the shift amount > 32
BB = TmpMBB;
unsigned Tmp7 = MakeReg(MVT::i32);
unsigned Tmp7 = MakeIntReg();
BuildMI(BB, PPC::OR, 2, Tmp7).addReg(Tmp6).addReg(Tmp6);
TmpMBB->addSuccessor(PhiMBB);
BB = PhiMBB;
@ -1948,7 +1956,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
bool U = (ISD::FP_TO_UINT == opcode);
Tmp1 = SelectExpr(N.getOperand(0));
if (!U) {
Tmp2 = MakeReg(MVT::f64);
Tmp2 = MakeFPReg();
BuildMI(BB, PPC::FCTIWZ, 1, Tmp2).addReg(Tmp1);
int FrameIdx = BB->getParent()->getFrameInfo()->CreateStackObject(8, 8);
addFrameReference(BuildMI(BB, PPC::STFD, 3).addReg(Tmp2), FrameIdx);
@ -1958,14 +1966,14 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
unsigned Zero = getConstDouble(0.0);
unsigned MaxInt = getConstDouble((1LL << 32) - 1);
unsigned Border = getConstDouble(1LL << 31);
unsigned UseZero = MakeReg(MVT::f64);
unsigned UseMaxInt = MakeReg(MVT::f64);
unsigned UseChoice = MakeReg(MVT::f64);
unsigned TmpReg = MakeReg(MVT::f64);
unsigned TmpReg2 = MakeReg(MVT::f64);
unsigned ConvReg = MakeReg(MVT::f64);
unsigned IntTmp = MakeReg(MVT::i32);
unsigned XorReg = MakeReg(MVT::i32);
unsigned UseZero = MakeFPReg();
unsigned UseMaxInt = MakeFPReg();
unsigned UseChoice = MakeFPReg();
unsigned TmpReg = MakeFPReg();
unsigned TmpReg2 = MakeFPReg();
unsigned ConvReg = MakeFPReg();
unsigned IntTmp = MakeIntReg();
unsigned XorReg = MakeIntReg();
MachineFunction *F = BB->getParent();
int FrameIdx = F->getFrameInfo()->CreateStackObject(8, 8);
// Update machine-CFG edges
@ -2025,13 +2033,13 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
switch (CC) {
default: Node->dump(); assert(0 && "Unhandled SetCC condition"); abort();
case ISD::SETEQ:
Tmp2 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
BuildMI(BB, PPC::CNTLZW, 1, Tmp2).addReg(Tmp1);
BuildMI(BB, PPC::RLWINM, 4, Result).addReg(Tmp2).addImm(27)
.addImm(5).addImm(31);
break;
case ISD::SETNE:
Tmp2 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
BuildMI(BB, PPC::ADDIC, 2, Tmp2).addReg(Tmp1).addSImm(-1);
BuildMI(BB, PPC::SUBFE, 2, Result).addReg(Tmp2).addReg(Tmp1);
break;
@ -2040,8 +2048,8 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
.addImm(31).addImm(31);
break;
case ISD::SETGT:
Tmp2 = MakeReg(MVT::i32);
Tmp3 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
Tmp3 = MakeIntReg();
BuildMI(BB, PPC::NEG, 2, Tmp2).addReg(Tmp1);
BuildMI(BB, PPC::ANDC, 2, Tmp3).addReg(Tmp2).addReg(Tmp1);
BuildMI(BB, PPC::RLWINM, 4, Result).addReg(Tmp3).addImm(1)
@ -2054,29 +2062,29 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
switch (CC) {
default: assert(0 && "Unhandled SetCC condition"); abort();
case ISD::SETEQ:
Tmp2 = MakeReg(MVT::i32);
Tmp3 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
Tmp3 = MakeIntReg();
BuildMI(BB, PPC::ADDIC, 2, Tmp2).addReg(Tmp1).addSImm(1);
BuildMI(BB, PPC::LI, 1, Tmp3).addSImm(0);
BuildMI(BB, PPC::ADDZE, 1, Result).addReg(Tmp3);
break;
case ISD::SETNE:
Tmp2 = MakeReg(MVT::i32);
Tmp3 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
Tmp3 = MakeIntReg();
BuildMI(BB, PPC::NOR, 2, Tmp2).addReg(Tmp1).addReg(Tmp1);
BuildMI(BB, PPC::ADDIC, 2, Tmp3).addReg(Tmp2).addSImm(-1);
BuildMI(BB, PPC::SUBFE, 2, Result).addReg(Tmp3).addReg(Tmp2);
break;
case ISD::SETLT:
Tmp2 = MakeReg(MVT::i32);
Tmp3 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
Tmp3 = MakeIntReg();
BuildMI(BB, PPC::ADDI, 2, Tmp2).addReg(Tmp1).addSImm(1);
BuildMI(BB, PPC::AND, 2, Tmp3).addReg(Tmp2).addReg(Tmp1);
BuildMI(BB, PPC::RLWINM, 4, Result).addReg(Tmp3).addImm(1)
.addImm(31).addImm(31);
break;
case ISD::SETGT:
Tmp2 = MakeReg(MVT::i32);
Tmp2 = MakeIntReg();
BuildMI(BB, PPC::RLWINM, 4, Tmp2).addReg(Tmp1).addImm(1)
.addImm(31).addImm(31);
BuildMI(BB, PPC::XORI, 2, Result).addReg(Tmp2).addImm(1);
@ -2217,7 +2225,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
if (v < 32768 && v >= -32768) {
BuildMI(BB, PPC::LI, 1, Result).addSImm(v);
} else {
Tmp1 = MakeReg(MVT::i32);
Tmp1 = MakeIntReg();
BuildMI(BB, PPC::LIS, 1, Tmp1).addSImm(v >> 16);
BuildMI(BB, PPC::ORI, 2, Result).addReg(Tmp1).addImm(v & 0xFFFF);
}
@ -2296,8 +2304,8 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
&& "int to float must operate on i32");
bool IsUnsigned = (ISD::UINT_TO_FP == opcode);
Tmp1 = SelectExpr(N.getOperand(0)); // Get the operand register
Tmp2 = MakeReg(MVT::f64); // temp reg to load the integer value into
Tmp3 = MakeReg(MVT::i32); // temp reg to hold the conversion constant
Tmp2 = MakeFPReg(); // temp reg to load the integer value into
Tmp3 = MakeIntReg(); // temp reg to hold the conversion constant
int FrameIdx = BB->getParent()->getFrameInfo()->CreateStackObject(8, 8);
MachineConstantPool *CP = BB->getParent()->getConstantPool();
@ -2313,7 +2321,7 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
BuildMI(BB, PPC::FSUB, 2, Result).addReg(Tmp2).addReg(ConstF);
} else {
unsigned ConstF = getConstDouble(0x1.000008p52);
unsigned TmpL = MakeReg(MVT::i32);
unsigned TmpL = MakeIntReg();
// Store the hi & low halves of the fp value, currently in int regs
BuildMI(BB, PPC::LIS, 1, Tmp3).addSImm(0x4330);
addFrameReference(BuildMI(BB, PPC::STW, 3).addReg(Tmp3), FrameIdx);