new testcase. globaldce should not delete the global

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8999 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/GlobalDCE/2003-10-09-PreserveWeakGlobals.ll b/test/Transforms/GlobalDCE/2003-10-09-PreserveWeakGlobals.ll
new file mode 100644 (file)
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+++ b/test/Transforms/GlobalDCE/2003-10-09-PreserveWeakGlobals.ll
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+; Weak variables should be preserved by global DCE!
+
+; RUN: llvm-as < %s | opt -globaldce | llvm-dis | grep %A
+
+
+%A = weak global int 54