1 files changed, 13 insertions, 0 deletions
diff --git a/test/Transforms/DeadStoreElimination/PartialStore.ll b/test/Transforms/DeadStoreElimination/PartialStore.ll
new file mode 100644
index 000000000000..ce1965724f10
--- /dev/null
+++ b/test/Transforms/DeadStoreElimination/PartialStore.ll
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s | opt -dse | llvm-dis | \
+; RUN:    not grep {store i8}
+; Ensure that the dead store is deleted in this case.  It is wholely
+; overwritten by the second store.
+define i32 @test() {
+        %V = alloca i32         ; <i32*> [#uses=3]
+        %V2 = bitcast i32* %V to i8*            ; <i8*> [#uses=1]
+        store i8 0, i8* %V2
+        store i32 1234567, i32* %V
+        %X = load i32* %V               ; <i32> [#uses=1]
+        ret i32 %X
+}
+