[PATCH] DebugInfo: Permit DW_TAG_structure_type, DW_TAG_member, DW_TAG_typedef tags with empty file names.

[Paul Robinson]

LGTM with the DW_TAG|NULL chang, and thanks for tolerating the pickiness about debug-info tests!


================
Comment at: test/DebugInfo/X86/missing-file-line.ll:22
@@ +21,3 @@
+  ; CHECK1-NOT: DW_AT_decl_line
+  ; CHECK1: {{^0x}}
+
----------------
I see why this works, but we usually check DW_TAG|NULL to constrain the range to a single DIE.  Ditto for the other two places.

http://reviews.llvm.org/D8588

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