new testcase that causes instcombine to infinitely loop

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33342 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/2007-01-18-VectorInfLoop.ll b/test/Transforms/InstCombine/2007-01-18-VectorInfLoop.ll
new file mode 100644 (file)
index 0000000..0aa2022
--- /dev/null
+++ b/test/Transforms/InstCombine/2007-01-18-VectorInfLoop.ll
@@ -0,0 +1,7 @@
+; RUN: llvm-as < %s | opt -instcombine -disable-output
+
+define <4 x i32> %test(<4 x i32> %A) {
+    %B = xor <4 x i32> %A, < i32 -1, i32 -1, i32 -1, i32 -1 > 
+    %C = and <4 x i32> %B, < i32 -1, i32 -1, i32 -1, i32 -1 >
+    ret <4 x i32> %C
+}