diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/InstSelectSimple.cpp | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/InstSelectSimple.cpp b/llvm/lib/Target/X86/InstSelectSimple.cpp index 6958979cd36..775833c3d02 100644 --- a/llvm/lib/Target/X86/InstSelectSimple.cpp +++ b/llvm/lib/Target/X86/InstSelectSimple.cpp @@ -1038,7 +1038,18 @@ void ISel::emitSelectOperation(MachineBasicBlock *MBB, FalseVal = ConstantExpr::getCast(F, Type::ShortTy); } - + unsigned TrueReg = getReg(TrueVal, MBB, IP); + unsigned FalseReg = getReg(FalseVal, MBB, IP); + if (TrueReg == FalseReg) { + static const unsigned Opcode[] = { + X86::MOV8rr, X86::MOV16rr, X86::MOV32rr, X86::FpMOV, X86::MOV32rr + }; + BuildMI(*MBB, IP, Opcode[SelectClass], 1, DestReg).addReg(TrueReg); + if (SelectClass == cLong) + BuildMI(*MBB, IP, X86::MOV32rr, 1, DestReg+1).addReg(TrueReg+1); + return; + } + unsigned Opcode; if (SetCondInst *SCI = canFoldSetCCIntoBranchOrSelect(Cond)) { // We successfully folded the setcc into the select instruction. @@ -1130,8 +1141,6 @@ void ISel::emitSelectOperation(MachineBasicBlock *MBB, } } - unsigned TrueReg = getReg(TrueVal, MBB, IP); - unsigned FalseReg = getReg(FalseVal, MBB, IP); unsigned RealDestReg = DestReg; |
