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 {
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
