Do not try to emit debug info entry for dead global variable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86212 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 17 insertions, 0 deletions

diff --git a/test/DebugInfo/2009-11-05-DeadGlobalVariable.ll b/test/DebugInfo/2009-11-05-DeadGlobalVariable.ll
new file mode 100644
index 0000000000..c7838c5488
--- /dev/null
+++ b/test/DebugInfo/2009-11-05-DeadGlobalVariable.ll
@@ -0,0 +1,17 @@
+; RUN: llc %s -o /dev/null
+; Here variable bar is optimzied away. Do not trip over while trying to generate debug info.
+
+define i32 @foo() nounwind readnone optsize ssp {
+entry:
+  ret i32 42, !dbg !6
+}
+
+!llvm.dbg.gv = !{!0}
+
+!0 = metadata !{i32 458804, i32 0, metadata !1, metadata !"foo.bar", metadata !"foo.bar", metadata !"foo.bar", metadata !2, i32 3, metadata !5, i1 true, i1 true, null}; [DW_TAG_variable ]
+!1 = metadata !{i32 458798, i32 0, metadata !2, metadata !"foo", metadata !"foo", metadata !"foo", metadata !2, i32 2, metadata !3, i1 false, i1 true}; [DW_TAG_subprogram ]
+!2 = metadata !{i32 458769, i32 0, i32 12, metadata !"st.c", metadata !"/private/tmp", metadata !"clang 1.1", i1 true, i1 true, metadata !"", i32 0}; [DW_TAG_compile_unit ]
+!3 = metadata !{i32 458773, metadata !2, metadata !"", null, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !4, i32 0}; [DW_TAG_subroutine_type ]
+!4 = metadata !{metadata !5}
+!5 = metadata !{i32 458788, metadata !2, metadata !"int", metadata !2, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5}; [DW_TAG_base_type ]
+!6 = metadata !{i32 5, i32 1, metadata !1, null}