diff --git a/llvm/test/Transforms/DeadStoreElimination/MSSA/pr16520.ll b/llvm/test/Transforms/DeadStoreElimination/MSSA/pr16520.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/DeadStoreElimination/MSSA/pr16520.ll
@@ -0,0 +1,25 @@
+; ModuleID = 'pr16520.cc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @_Z1fbRb(i1 zeroext %b, i8* nocapture %r) {
+entry:
+  store i8 1, i8* %r, align 1
+  br i1 %b, label %if.then, label %if.else
+
+if.then:                                          ; preds = %entry
+  store i8 1, i8* %r, align 1
+  tail call void @_Z1gv()
+  br label %if.end
+
+if.else:                                          ; preds = %entry
+  tail call void @_Z1hv()
+  br label %if.end
+
+if.end:                                           ; preds = %if.else, %if.then
+  ret void
+}
+
+declare void @_Z1gv()
+
+declare void @_Z1hv()