diff options
| author | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-02-04 22:17:40 +0000 |
|---|---|---|
| committer | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-02-04 22:17:40 +0000 |
| commit | 14be64018fb38d1fa535b9cd12d11371f4eba3b5 (patch) | |
| tree | 2c3d0a9d629d6c3998e976920255848c298d4d42 /lib/Target/X86/X86CodeEmitter.cpp | |
| parent | a33ceaa2d46f6bf50c979e28581d9e4941b45d44 (diff) | |
Modify the two address instruction pass to remove the duplicate
operand of the instruction and thus simplify the register allocation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11124 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86CodeEmitter.cpp')
| -rw-r--r-- | lib/Target/X86/X86CodeEmitter.cpp | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp index 13e9d762f5..516f1d2725 100644 --- a/lib/Target/X86/X86CodeEmitter.cpp +++ b/lib/Target/X86/X86CodeEmitter.cpp @@ -548,10 +548,10 @@ void Emitter::emitInstruction(MachineInstr &MI) { case X86II::MRMDestReg: { MCE.emitByte(BaseOpcode); - MachineOperand &SrcOp = MI.getOperand(1+II->isTwoAddrInstr(Opcode)); - emitRegModRMByte(MI.getOperand(0).getReg(), getX86RegNum(SrcOp.getReg())); - if (MI.getNumOperands() == 4) - emitConstant(MI.getOperand(3).getImmedValue(), sizeOfPtr(Desc)); + emitRegModRMByte(MI.getOperand(0).getReg(), + getX86RegNum(MI.getOperand(1).getReg())); + if (MI.getNumOperands() == 3) + emitConstant(MI.getOperand(2).getImmedValue(), sizeOfPtr(Desc)); break; } case X86II::MRMDestMem: @@ -562,18 +562,10 @@ void Emitter::emitInstruction(MachineInstr &MI) { case X86II::MRMSrcReg: MCE.emitByte(BaseOpcode); - if (MI.getNumOperands() == 2) { - emitRegModRMByte(MI.getOperand(MI.getNumOperands()-1).getReg(), - getX86RegNum(MI.getOperand(0).getReg())); - } else if (MI.getOperand(2).isImmediate()) { - emitRegModRMByte(MI.getOperand(1).getReg(), - getX86RegNum(MI.getOperand(0).getReg())); - + emitRegModRMByte(MI.getOperand(1).getReg(), + getX86RegNum(MI.getOperand(0).getReg())); + if (MI.getNumOperands() == 3) emitConstant(MI.getOperand(2).getImmedValue(), sizeOfPtr(Desc)); - } else { - emitRegModRMByte(MI.getOperand(2).getReg(), - getX86RegNum(MI.getOperand(0).getReg())); - } break; case X86II::MRMSrcMem: |