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Under 64-bit mode use LEA64_32r instead of LEA64r to save a byte.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42783 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-10-09 07:14:53 +00:00
parent 05831c073a
commit b76143cf8f
1 changed files with 13 additions and 6 deletions
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19
lib/Target/X86/X86InstrInfo.cpp
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@ -271,12 +271,14 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
if (hasLiveCondCodeDef(MI))
return 0;
bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
switch (MIOpc) {
default: return 0;
case X86::INC64r:
case X86::INC32r: {
assert(MI->getNumOperands() >= 2 && "Unknown inc instruction!");
unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r : X86::LEA32r;
unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r
: (is64Bit ? X86::LEA64_32r : X86::LEA32r);
NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, 1);
break;
}
@ -289,7 +291,8 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
case X86::DEC64r:
case X86::DEC32r: {
assert(MI->getNumOperands() >= 2 && "Unknown dec instruction!");
unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r : X86::LEA32r;
unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r
: (is64Bit ? X86::LEA64_32r : X86::LEA32r);
NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src, -1);
break;
}
@ -302,7 +305,8 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
case X86::ADD64rr:
case X86::ADD32rr: {
assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
unsigned Opc = MIOpc == X86::ADD64rr ? X86::LEA64r : X86::LEA32r;
unsigned Opc = MIOpc == X86::ADD64rr ? X86::LEA64r
: (is64Bit ? X86::LEA64_32r : X86::LEA32r);
NewMI = addRegReg(BuildMI(get(Opc), Dest), Src,
MI->getOperand(2).getReg());
break;
@ -323,9 +327,11 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
case X86::ADD32ri:
case X86::ADD32ri8:
assert(MI->getNumOperands() >= 3 && "Unknown add instruction!");
if (MI->getOperand(2).isImmediate())
NewMI = addRegOffset(BuildMI(get(X86::LEA32r), Dest), Src,
if (MI->getOperand(2).isImmediate()) {
unsigned Opc = is64Bit ? X86::LEA64_32r : X86::LEA32r;
NewMI = addRegOffset(BuildMI(get(Opc), Dest), Src,
MI->getOperand(2).getImmedValue());
}
break;
case X86::ADD16ri:
case X86::ADD16ri8:
@ -347,7 +353,8 @@ X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
AM.Scale = 1 << ShAmt;
AM.IndexReg = Src;
unsigned Opc = MIOpc == X86::SHL64ri ? X86::LEA64r
: (MIOpc == X86::SHL32ri ? X86::LEA32r : X86::LEA16r);
: (MIOpc == X86::SHL32ri
? (is64Bit ? X86::LEA64_32r : X86::LEA32r) : X86::LEA16r);
NewMI = addFullAddress(BuildMI(get(Opc), Dest), AM);
}
break;