1 files changed, 16 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/tailcall-modref.ll b/test/Analysis/BasicAA/tailcall-modref.ll
new file mode 100644
index 0000000..f7d6c57
--- /dev/null
+++ b/test/Analysis/BasicAA/tailcall-modref.ll
@@ -0,0 +1,16 @@
+; RUN: opt < %s -basicaa -gvn -instcombine |\
+; RUN:   llvm-dis | grep {ret i32 0}
+
+declare void @foo(i32*)
+
+declare void @bar()
+
+define i32 @test() {
+        %A = alloca i32         ; <i32*> [#uses=3]
+        call void @foo( i32* %A )
+        %X = load i32* %A               ; <i32> [#uses=1]
+        tail call void @bar( )
+        %Y = load i32* %A               ; <i32> [#uses=1]
+        %Z = sub i32 %X, %Y             ; <i32> [#uses=1]
+        ret i32 %Z
+}