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| author | Alexandre Oliva <aoliva@redhat.com> | 2017-12-12 02:16:31 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2017-12-12 02:16:31 +0000 |
| commit | 8697bf9f46f36168ddba5752db582e673e3cbe8c (patch) | |
| tree | 5ebc4974d8a1f07ace0cda3e302d94bfd57725a5 /gcc/doc | |
| parent | 96a95ac18c2fe573d9c5039be18cf7c6cb26f171 (diff) | |
| download | gcc-8697bf9f46f36168ddba5752db582e673e3cbe8c.zip gcc-8697bf9f46f36168ddba5752db582e673e3cbe8c.tar.gz gcc-8697bf9f46f36168ddba5752db582e673e3cbe8c.tar.bz2 | |
[SFN] Introduce -gstatement-frontiers option, enable debug markers
Introduce a command line option to enable statement frontiers, enabled
by default in optimized builds with DWARF2+ debug information.
This patch depends on an earlier patch that completed the
infrastructure for debug markers, and on another patch that turns -g
into a negatable option prefix.
for gcc/ChangeLog
* common.opt (gstatement-frontiers): New, setting
debug_nonbind_markers_p.
* rtl.h (MAY_HAVE_DEBUG_MARKER_INSNS): Activate.
* toplev.c (process_options): Autodetect value for debug statement
frontiers option.
* tree.h (MAY_HAVE_DEBUG_MARKER_STMTS): Activate.
* doc/invoke.texi (gstatement-frontiers, gno-statement-frontiers): New.
From-SVN: r255569
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 189b3e4..6402a5a 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -346,6 +346,7 @@ Objective-C and Objective-C++ Dialects}. -ggdb -grecord-gcc-switches -gno-record-gcc-switches @gol -gstabs -gstabs+ -gstrict-dwarf -gno-strict-dwarf @gol -gcolumn-info -gno-column-info @gol +-gstatement-frontiers -gno-statement-frontiers @gol -gvms -gxcoff -gxcoff+ -gz@r{[}=@var{type}@r{]} @gol -fdebug-prefix-map=@var{old}=@var{new} -fdebug-types-section @gol -fno-eliminate-unused-debug-types @gol @@ -7146,6 +7147,17 @@ Emit location column information into DWARF debugging information, rather than just file and line. This option is enabled by default. +@item -gstatement-frontiers +@item -gno-statement-frontiers +@opindex gstatement-frontiers +@opindex gno-statement-frontiers +This option causes GCC to create markers in the internal representation +at the beginning of statements, and to keep them roughly in place +throughout compilation, using them to guide the output of @code{is_stmt} +markers in the line number table. This is enabled by default when +compiling with optimization (@option{-Os}, @option{-O}, @option{-O2}, +@dots{}), and outputting DWARF 2 debug information at the normal level. + @item -gz@r{[}=@var{type}@r{]} @opindex gz Produce compressed debug sections in DWARF format, if that is supported. |