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diff --git a/test/CodeGen/CBackend/2004-02-15-PreexistingExternals.llx b/test/CodeGen/CBackend/2004-02-15-PreexistingExternals.llx
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+; The intrinsic lowering pass was lowering intrinsics like llvm.memcpy to 
+; explicitly specified prototypes, inserting a new function if the old one
+; didn't exist.  This caused there to be two external memcpy functions in 
+; this testcase for example, which caused the CBE to mangle one, screwing
+; everything up.  :(  Test that this does not happen anymore.
+;
+; RUN: llvm-upgrade < %s | llvm-as | llc -march=c | not grep _memcpy
+
+declare void %llvm.memcpy.i32(sbyte*, sbyte*, uint,uint)
+declare float* %memcpy(int*, uint,int)
+
+int %test(sbyte *%A, sbyte* %B, int* %C) {
+	call float* %memcpy(int* %C, uint 4, int 17)
+	call void %llvm.memcpy.i32(sbyte* %A, sbyte* %B, uint 123, uint 14)
+	ret int 7
+}