X86 shifts mask the amount.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19678 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
index f6065b13374f394c13f68e9f54c4d9c04b18045e..1228d70bc04af5b8063823997f713f70f3472e05 100644 (file)
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ b/lib/Target/X86/X86ISelPattern.cpp
@@ -43,6 +43,7 @@ namespace {
       // X86 is wierd, it always uses i8 for shift amounts and setcc results.
       setShiftAmountType(MVT::i8);
       setSetCCResultType(MVT::i8);
+      setShiftAmountFlavor(Mask);   // shl X, 32 == shl X, 0
 
       // Set up the register classes.
       addRegisterClass(MVT::i8, X86::R8RegisterClass);