X86 zero extends setcc results

llvm-svn: 21146
diff --git a/llvm/lib/Target/X86/X86ISelPattern.cpp b/llvm/lib/Target/X86/X86ISelPattern.cpp
index 830dcc0..322d129 100644
--- a/llvm/lib/Target/X86/X86ISelPattern.cpp
+++ b/llvm/lib/Target/X86/X86ISelPattern.cpp
@@ -43,6 +43,7 @@
       // X86 is wierd, it always uses i8 for shift amounts and setcc results.
       setShiftAmountType(MVT::i8);
       setSetCCResultType(MVT::i8);
+      setSetCCResultContents(ZeroOrOneSetCCResult);
       setShiftAmountFlavor(Mask);   // shl X, 32 == shl X, 0
 
       // Set up the register classes.