A bunch of PCH tests fail for a PTX target, due to a difference in debug data.
It turned out that object pointed to by cur_line_info_table was poisoned by PCH
reading, and this led to an is_stmt being emitted erroneously.
My suspicion is that ports that support section switching update
cur_line_info_table and/or reach that object by another path during PCH writing
and reading, so don't see this failure.
PTX doesn't override TARGET_HAVE_NAMED_SECTIONS, which might be an oversight.
However, setting it to false doesn't fix this problem. Hence I deduce this is
simply an oversite.
tested on x86_64-linux as well as ptx-none. Applied as obvious.
nathan
2016-05-31 Nathan Sidwell <nat...@acm.org>
* dwarf2out.c (cur_line_info_table): Add GTY marker.
Index: dwarf2out.c
===================================================================
--- dwarf2out.c (revision 236774)
+++ dwarf2out.c (working copy)
@@ -3038,7 +3038,7 @@ static unsigned int line_info_label_num;
/* The current table to which we should emit line number information
for the current function. This will be set up at the beginning of
assembly for the function. */
-static dw_line_info_table *cur_line_info_table;
+static GTY(()) dw_line_info_table *cur_line_info_table;
/* The two default tables of line number info. */
static GTY(()) dw_line_info_table *text_section_line_info;
