[llvm-commits] CVS: llvm/lib/Target/X86/X86ISelDAGToDAG.cpp

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

X86ISelDAGToDAG.cpp updated: 1.71 -> 1.72
---
Log message:

Use xor to clear a register.

---
Diffs of the changes:  (+4 -6)

 X86ISelDAGToDAG.cpp |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)


Index: llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
diff -u llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:1.71 
llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:1.72
--- llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:1.71        Tue May 30 15:24:48 2006
+++ llvm/lib/Target/X86/X86ISelDAGToDAG.cpp     Fri Jun  2 16:20:34 2006
@@ -744,17 +744,17 @@
       default: assert(0 && "Unsupported VT!");
       case MVT::i8:
         LoReg = X86::AL;  HiReg = X86::AH;
-        ClrOpcode  = X86::MOV8ri;
+        ClrOpcode  = X86::MOV8r0;
         SExtOpcode = X86::CBW;
         break;
       case MVT::i16:
         LoReg = X86::AX;  HiReg = X86::DX;
-        ClrOpcode  = X86::MOV16ri;
+        ClrOpcode  = X86::MOV16r0;
         SExtOpcode = X86::CWD;
         break;
       case MVT::i32:
         LoReg = X86::EAX; HiReg = X86::EDX;
-        ClrOpcode  = X86::MOV32ri;
+        ClrOpcode  = X86::MOV32r0;
         SExtOpcode = X86::CDQ;
         break;
       }
@@ -783,9 +783,7 @@
           SDOperand(CurDAG->getTargetNode(SExtOpcode, MVT::Flag, InFlag), 0);
       } else {
         // Zero out the high part, effectively zero extending the input.
-        SDOperand ClrNode =
-          SDOperand(CurDAG->getTargetNode(ClrOpcode, NVT,
-                                         CurDAG->getTargetConstant(0, NVT)), 
0);
+        SDOperand ClrNode = SDOperand(CurDAG->getTargetNode(ClrOpcode, NVT), 
0);
         Chain  = CurDAG->getCopyToReg(Chain, CurDAG->getRegister(HiReg, NVT),
                                       ClrNode, InFlag);
         InFlag = Chain.getValue(1);



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