1 files changed, 12 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/xor-and.ll b/test/Analysis/ScalarEvolution/xor-and.ll
new file mode 100644
index 000000000000..843052456a80
--- /dev/null
+++ b/test/Analysis/ScalarEvolution/xor-and.ll
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | opt -scalar-evolution -disable-output -analyze \
+; RUN:   | grep {\\-->  (zext i4 (-8 + (trunc i64 (8 \\* %x) to i4)) to i64)}
+
+; ScalarEvolution shouldn't try to analyze %z into something like
+;   -->  (zext i4 (-1 + (-1 * (trunc i64 (8 * %x) to i4))) to i64)
+
+define i64 @foo(i64 %x) {
+  %a = shl i64 %x, 3
+  %t = and i64 %a, 8
+  %z = xor i64 %t, 8
+  ret i64 %z
+}