Improve memory statistics report readability.

Improve memory statistics report readability.

2019-02-26  Martin Liska  <mliska@suse.cz>

	* alloc-pool.h (struct pool_usage): Remove extra
	print_dash_line.
	* bitmap.h (struct bitmap_usage): Likewise.
	* ggc-common.c (struct ggc_usage): Likewise.
	* mem-stats.h (struct mem_usage): Likewise.
	(mem_alloc_description::dump): Print dash lines
	here and repeat header at the end of a table report.
	It's then more readable.
	* tree-phinodes.c (phinodes_print_statistics): Make
	horizontal alignment.
	* tree-ssanames.c (ssanames_print_statistics): Likewise.
	* vec.c (struct vec_usage): Remove extra print_dash_line.
	* vec.h (vec_safe_grow_cleared): Pass PASS_MEM_STAT.
2019-02-26  Martin Liska  <mliska@suse.cz>

	* symtab.c (ht_dump_statistics): Make
	horizontal alignment for statistics.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269221 138bc75d-0d04-0410-961f-82ee72b054a4