[PATCH 2/2] [PR symtab/17276]: Coalesce line number entries.

[Doug Evans]

Doug Evans writes:
 > Hi.
 > 
 > This is the second of two patches to fix pr 17276.
 > See the description here:
 > 
 > https://sourceware.org/ml/gdb-patches/2014-08/msg00283.html
 > 
 > This patch keeps track of whether the current line has seen a
 > non-zero discriminator, and if so coalesces consecutive entries
 > for the same line (by ignoring all entries after the first).
 > 
 > 2014-08-15  Doug Evans  <dje@google.com>
 > 
 > 	PR 17276
 > 	* dwarf2read.c (dwarf_record_line_p): New function.
 > 	(dwarf_decode_lines_1): Ignore subsequent line number entries
 > 	for the same line if any entry had a non-zero discriminator.
 > 
 > 	testsuite/
 > 	* gdb.dwarf2/dw2-single-line-discriminators.S: New file.
 > 	* gdb.dwarf2/dw2-single-line-discriminators.c: New file.
 > 	* gdb.dwarf2/dw2-single-line-discriminators.exp: New file.

I have committed this series.