New testcase

llvm-svn: 11766
2004-02-23 20:19:51 +00:00 · 2004-02-23 20:19:51 +00:00 · 1cc1217121
parent cc7644407c
commit 1cc1217121
1 changed files with 8 additions and 0 deletions
--- a/llvm/test/Regression/Transforms/InstCombine/2004-02-23-ShiftShiftOverflow.ll
+++ b/llvm/test/Regression/Transforms/InstCombine/2004-02-23-ShiftShiftOverflow.ll
@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 34
+
+int %test(int %X) {
+	; Do not fold into shr X, 34, as this uses undefined behavior!
+	%Y = shr int %X, ubyte 17
+	%Z = shr int %Y, ubyte 17
+	ret int %Z
+}