1 files changed, 9 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2009-03-20-AShrOverShift.ll b/test/Transforms/InstCombine/2009-03-20-AShrOverShift.ll
new file mode 100644
index 0000000..0a07bf3
--- /dev/null
+++ b/test/Transforms/InstCombine/2009-03-20-AShrOverShift.ll
@@ -0,0 +1,9 @@
+; RUN: opt < %s -instcombine -S | grep {ashr i32 %val, 31}
+; PR3851
+
+define i32 @foo2(i32 %val) nounwind {
+entry:
+	%shr = ashr i32 %val, 15		; <i32> [#uses=3]
+	%shr4 = ashr i32 %shr, 17		; <i32> [#uses=1]
+        ret i32 %shr4
+ }