summaryrefslogtreecommitdiffstats
path: root/llvm/lib/Target/X86/X86InstrInfo.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'llvm/lib/Target/X86/X86InstrInfo.cpp')
-rw-r--r--llvm/lib/Target/X86/X86InstrInfo.cpp143
1 files changed, 33 insertions, 110 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index 86361ff8e36..5ed8604a399 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -1778,16 +1778,11 @@ X86InstrInfo::convertToThreeAddressWithLEA(unsigned MIOpc,
bool isDead = MI->getOperand(0).isDead();
bool isKill = MI->getOperand(1).isKill();
+ unsigned Opc = TM.getSubtarget<X86Subtarget>().is64Bit()
+ ? X86::LEA64_32r : X86::LEA32r;
MachineRegisterInfo &RegInfo = MFI->getParent()->getRegInfo();
+ unsigned leaInReg = RegInfo.createVirtualRegister(&X86::GR32_NOSPRegClass);
unsigned leaOutReg = RegInfo.createVirtualRegister(&X86::GR32RegClass);
- unsigned Opc, leaInReg;
- if (TM.getSubtarget<X86Subtarget>().is64Bit()) {
- Opc = X86::LEA64_32r;
- leaInReg = RegInfo.createVirtualRegister(&X86::GR64_NOSPRegClass);
- } else {
- Opc = X86::LEA32r;
- leaInReg = RegInfo.createVirtualRegister(&X86::GR32_NOSPRegClass);
- }
// Build and insert into an implicit UNDEF value. This is OK because
// well be shifting and then extracting the lower 16-bits.
@@ -1837,10 +1832,7 @@ X86InstrInfo::convertToThreeAddressWithLEA(unsigned MIOpc,
// just a single insert_subreg.
addRegReg(MIB, leaInReg, true, leaInReg, false);
} else {
- if (TM.getSubtarget<X86Subtarget>().is64Bit())
- leaInReg2 = RegInfo.createVirtualRegister(&X86::GR64_NOSPRegClass);
- else
- leaInReg2 = RegInfo.createVirtualRegister(&X86::GR32_NOSPRegClass);
+ leaInReg2 = RegInfo.createVirtualRegister(&X86::GR32_NOSPRegClass);
// Build and insert into an implicit UNDEF value. This is OK because
// well be shifting and then extracting the lower 16-bits.
BuildMI(*MFI, &*MIB, MI->getDebugLoc(), get(X86::IMPLICIT_DEF),leaInReg2);
@@ -1961,27 +1953,15 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
if (!isTruncatedShiftCountForLEA(ShAmt)) return 0;
// LEA can't handle ESP.
- bool isKill = Src.isKill();
- unsigned SrcReg = Src.getReg();
- if (is64Bit) {
- unsigned NewSrc = MF.getRegInfo().createVirtualRegister(&X86::GR64_NOSPRegClass);
- BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), get(TargetOpcode::COPY))
- .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)
- .addOperand(Src);
-
- SrcReg = NewSrc;
- isKill = true;
- } else if (TargetRegisterInfo::isVirtualRegister(SrcReg) &&
- !MF.getRegInfo().constrainRegClass(SrcReg,
- &X86::GR32_NOSPRegClass)) {
+ if (TargetRegisterInfo::isVirtualRegister(Src.getReg()) &&
+ !MF.getRegInfo().constrainRegClass(Src.getReg(),
+ &X86::GR32_NOSPRegClass))
return 0;
- }
unsigned Opc = is64Bit ? X86::LEA64_32r : X86::LEA32r;
NewMI = BuildMI(MF, MI->getDebugLoc(), get(Opc))
.addOperand(Dest)
- .addReg(0).addImm(1 << ShAmt)
- .addReg(SrcReg, getKillRegState(isKill)).addImm(0).addReg(0);
+ .addReg(0).addImm(1 << ShAmt).addOperand(Src).addImm(0).addReg(0);
break;
}
case X86::SHL16ri: {
@@ -2006,28 +1986,17 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!");
unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r
: (is64Bit ? X86::LEA64_32r : X86::LEA32r);
- const TargetRegisterClass *RC = is64Bit ?
+ const TargetRegisterClass *RC = MIOpc == X86::INC64r ?
(const TargetRegisterClass*)&X86::GR64_NOSPRegClass :
(const TargetRegisterClass*)&X86::GR32_NOSPRegClass;
// LEA can't handle RSP.
- bool isKill = Src.isKill();
- unsigned SrcReg = Src.getReg();
- if (Opc == X86::LEA64_32r) {
- unsigned NewSrc = MF.getRegInfo().createVirtualRegister(&X86::GR64_NOSPRegClass);
- BuildMI(*MI->getParent(), MI, MI->getDebugLoc(),
- get(TargetOpcode::COPY))
- .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)
- .addOperand(Src);
-
- SrcReg = NewSrc;
- isKill = true;
- } else if (TargetRegisterInfo::isVirtualRegister(SrcReg) &&
- !MF.getRegInfo().constrainRegClass(SrcReg, RC))
+ if (TargetRegisterInfo::isVirtualRegister(Src.getReg()) &&
+ !MF.getRegInfo().constrainRegClass(Src.getReg(), RC))
return 0;
NewMI = addOffset(BuildMI(MF, MI->getDebugLoc(), get(Opc))
- .addOperand(Dest).addReg(SrcReg, getKillRegState(isKill)), 1);
+ .addOperand(Dest).addOperand(Src), 1);
break;
}
case X86::INC16r:
@@ -2044,28 +2013,16 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!");
unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r
: (is64Bit ? X86::LEA64_32r : X86::LEA32r);
- const TargetRegisterClass *RC = is64Bit ?
+ const TargetRegisterClass *RC = MIOpc == X86::DEC64r ?
(const TargetRegisterClass*)&X86::GR64_NOSPRegClass :
(const TargetRegisterClass*)&X86::GR32_NOSPRegClass;
// LEA can't handle RSP.
- bool isKill = Src.isKill();
- unsigned SrcReg = Src.getReg();
- if (Opc == X86::LEA64_32r) {
- unsigned NewSrc =
- MF.getRegInfo().createVirtualRegister(&X86::GR64_NOSPRegClass);
- BuildMI(*MI->getParent(), MI, MI->getDebugLoc(),
- get(TargetOpcode::COPY))
- .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)
- .addOperand(Src);
-
- SrcReg = NewSrc;
- isKill = true;
- } else if (TargetRegisterInfo::isVirtualRegister(SrcReg) &&
- !MF.getRegInfo().constrainRegClass(SrcReg, RC))
+ if (TargetRegisterInfo::isVirtualRegister(Src.getReg()) &&
+ !MF.getRegInfo().constrainRegClass(Src.getReg(), RC))
return 0;
NewMI = addOffset(BuildMI(MF, MI->getDebugLoc(), get(Opc))
- .addOperand(Dest).addReg(SrcReg, getKillRegState(isKill)), -1);
+ .addOperand(Dest).addOperand(Src), -1);
break;
}
case X86::DEC16r:
@@ -2088,50 +2045,30 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
RC = &X86::GR64_NOSPRegClass;
} else {
Opc = is64Bit ? X86::LEA64_32r : X86::LEA32r;
- RC = is64Bit ? &X86::GR64_NOSPRegClass : &X86::GR32_NOSPRegClass;
+ RC = &X86::GR32_NOSPRegClass;
}
- unsigned SrcReg = Src.getReg();
- unsigned isKill = Src.isKill();
- const MachineOperand &Src2 = MI->getOperand(2);
- unsigned Src2Reg = Src2.getReg();
- bool isKill2 = Src2.isKill();
+
+ unsigned Src2 = MI->getOperand(2).getReg();
+ bool isKill2 = MI->getOperand(2).isKill();
// LEA can't handle RSP.
- if (Opc == X86::LEA64_32r) {
- MachineBasicBlock &MBB = *MI->getParent();
-
- unsigned NewSrc = MF.getRegInfo().createVirtualRegister(RC);
- BuildMI(MBB, MI, MI->getDebugLoc(), get(TargetOpcode::COPY))
- .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)
- .addOperand(Src);
- SrcReg = NewSrc;
- isKill = true;
-
- NewSrc = MF.getRegInfo().createVirtualRegister(RC);
- BuildMI(MBB, MI, MI->getDebugLoc(), get(TargetOpcode::COPY))
- .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)
- .addOperand(Src2);
- Src2Reg = NewSrc;
- isKill2 = true;
- } else if (TargetRegisterInfo::isVirtualRegister(Src2Reg) &&
- !MF.getRegInfo().constrainRegClass(Src2Reg, RC))
+ if (TargetRegisterInfo::isVirtualRegister(Src2) &&
+ !MF.getRegInfo().constrainRegClass(Src2, RC))
return 0;
NewMI = addRegReg(BuildMI(MF, MI->getDebugLoc(), get(Opc))
.addOperand(Dest),
- SrcReg, isKill, Src2Reg, isKill2);
+ Src.getReg(), Src.isKill(), Src2, isKill2);
// Preserve undefness of the operands.
- if (!is64Bit) {
- bool isUndef = MI->getOperand(1).isUndef();
- bool isUndef2 = MI->getOperand(2).isUndef();
- NewMI->getOperand(1).setIsUndef(isUndef);
- NewMI->getOperand(3).setIsUndef(isUndef2);
- }
+ bool isUndef = MI->getOperand(1).isUndef();
+ bool isUndef2 = MI->getOperand(2).isUndef();
+ NewMI->getOperand(1).setIsUndef(isUndef);
+ NewMI->getOperand(3).setIsUndef(isUndef2);
- if (LV && Src2.isKill())
- LV->replaceKillInstruction(Src2Reg, MI, NewMI);
+ if (LV && isKill2)
+ LV->replaceKillInstruction(Src2, MI, NewMI);
break;
}
case X86::ADD16rr:
@@ -2169,24 +2106,10 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
case X86::ADD32ri_DB:
case X86::ADD32ri8_DB: {
assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
- if (is64Bit) {
- unsigned NewSrc =
- MF.getRegInfo().createVirtualRegister(&X86::GR64_NOSPRegClass);
- BuildMI(*MI->getParent(), MI, MI->getDebugLoc(),
- get(TargetOpcode::COPY))
- .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)
- .addOperand(Src);
-
- NewMI = addOffset(BuildMI(MF, MI->getDebugLoc(), get(X86::LEA64_32r))
- .addOperand(Dest)
- .addReg(NewSrc, getKillRegState(true)),
- MI->getOperand(2).getImm());
- } else {
- NewMI = addOffset(BuildMI(MF, MI->getDebugLoc(), get(X86::LEA32r))
- .addOperand(Dest).addOperand(Src),
- MI->getOperand(2).getImm());
- }
-
+ unsigned Opc = is64Bit ? X86::LEA64_32r : X86::LEA32r;
+ NewMI = addOffset(BuildMI(MF, MI->getDebugLoc(), get(Opc))
+ .addOperand(Dest).addOperand(Src),
+ MI->getOperand(2).getImm());
break;
}
case X86::ADD16ri:
OpenPOWER on IntegriCloud