[Bug gas/26740] Extra filename generated by --gdwarf-4

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26740

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |2.36

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Mark Wielaard from comment #1)
> The issue is that some instructions are emitted (dwarf2_emit_insn is called)
> before the first .file <NUMBER> directive has been seen. This allocates x.s
> (the input file) as first file entry. Later when the actual .file 1
> lbasename.c and .file 2 safe-ctype are seen the x.s entry is moved to entry
> 3. We don't record that we never actually use that entry and so we still
> emit it.

Is this a GCC bug? Even if it is, assembler shouldn't generate bad debug
info.

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