[llvm-commits] [llvm] r46345 - /llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

[Chris Lattner]

Author: lattner
Date: Fri Jan 25 00:14:17 2008
New Revision: 46345

URL: http://llvm.org/viewvc/llvm-project?rev=46345&view=rev
Log:
optimize fxor like for

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=46345&r1=46344&r2=46345&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Fri Jan 25 00:14:17 2008
@@ -5627,10 +5627,12 @@
   return SDOperand();
 }
 
-/// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR nodes.
+/// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
+/// X86ISD::FXOR nodes.
 static SDOperand PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
-  // FOR(0.0, x) -> x
-  // FOR(x, 0.0) -> x
+  assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
+  // F[X]OR(0.0, x) -> x
+  // F[X]OR(x, 0.0) -> x
   if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
     if (C->getValueAPF().isPosZero())
       return N->getOperand(1);
@@ -5661,6 +5663,7 @@
   default: break;
   case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, Subtarget);
   case ISD::SELECT:         return PerformSELECTCombine(N, DAG, Subtarget);
+  case X86ISD::FXOR:
   case X86ISD::FOR:         return PerformFORCombine(N, DAG);
   case X86ISD::FAND:        return PerformFANDCombine(N, DAG);
   }