New testcase for behavior we depend on.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6483 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Linker/2003-05-31-LinkerRename.ll b/test/Linker/2003-05-31-LinkerRename.ll
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+++ b/test/Linker/2003-05-31-LinkerRename.ll
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+; The funcresolve pass will (intentionally) link an _internal_ function body with an
+; external declaration.  Because of this, if we LINK an internal function body into
+; a program that already has an external declaration for the function name, we must
+; rename the internal function to something that does not conflict.
+
+; RUN: echo "implementation internal int %foo() { ret int 7 }" | as > Output/%s.1.bc
+; RUN: as < %s > Output/%s.2.bc
+; RUN: if link Output/%s.[12].bc | dis | grep 'internal' | grep '%foo('
+; RUN: then exit 1
+; RUN: else exit 0
+; RUN: fi
+
+implementation
+declare int %foo() 
+
+int %test() { 
+  %X = call int %foo()
+  ret int %X
+}
+