[SFN+LVU+IEPM v4 6/9] [SFN] Introduce -gstatement-frontiers option, enable debug markers

[Jeff Law]

On 11/09/2017 07:34 PM, Alexandre Oliva wrote:
> 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.
> 
> 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.
OK once all prereqs are ack'd.

jeff