[llvm-commits] [llvm] r46053 - /llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

[Chris Lattner]

Author: lattner
Date: Tue Jan 15 23:53:06 2008
New Revision: 46053

URL: http://llvm.org/viewvc/llvm-project?rev=46053&view=rev
Log:
make the 'fp return in ST(0)' optimization smart enough to 
look through token factor

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=46053&r1=46052&r2=46053&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Tue Jan 15 23:53:06 2008
@@ -767,7 +767,7 @@
       // If this is a load into a scalarsse value, don't store the loaded value
       // back to the stack, only to reload it: just replace the scalar-sse 
load.
       if (ISD::isNON_EXTLoad(Value.Val) &&
-          (Chain == Value.getValue(1) || Chain == Value.getOperand(0))) {
+          Chain.reachesChainWithoutSideEffects(Value.getOperand(0))) {
         Chain  = Value.getOperand(0);
         MemLoc = Value.getOperand(1);
       } else {


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