+; RUN: llvm-as <%s | opt -ipsccp | llvm-dis | FileCheck %s
+; Don't constant-propagate byval pointers, since they are not pointers!
+; PR5038
+%struct.MYstr = type { i8, i32 }
+@mystr = internal global %struct.MYstr zeroinitializer ; <%struct.MYstr*> [#uses=3]
+define internal void @vfu1(%struct.MYstr* byval align 4 %u) nounwind {
+entry:
+ %0 = getelementptr %struct.MYstr* %u, i32 0, i32 1 ; <i32*> [#uses=1]
+ store i32 99, i32* %0, align 4
+; CHECK: %struct.MYstr* %u
+ %1 = getelementptr %struct.MYstr* %u, i32 0, i32 0 ; <i8*> [#uses=1]
+ store i8 97, i8* %1, align 4
+; CHECK: %struct.MYstr* %u
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+define void @unions() nounwind {
+entry:
+ call void @vfu1(%struct.MYstr* byval align 4 @mystr) nounwind
+ ret void
+}
+