opts.c (default_options_table): Move -ftree-loop-distribute-patterns entry from…

opts.c (default_options_table): Move -ftree-loop-distribute-patterns entry from -O3 or later section to -O2 or...

	* opts.c (default_options_table): Move -ftree-loop-distribute-patterns
	entry from -O3 or later section to -O2 or later section.
	* doc/invoke.texi (-ftree-loop-distribute-patterns): Mention the
	option is enabled by default at -O2+ rather than just at -O3.

From-SVN: r279267

gcc/ChangeLog

 2019-12-11  Jakub Jelinek  <jakub@redhat.com>
 
+	* opts.c (default_options_table): Move -ftree-loop-distribute-patterns
+	entry from -O3 or later section to -O2 or later section.
+	* doc/invoke.texi (-ftree-loop-distribute-patterns): Mention the
+	option is enabled by default at -O2+ rather than just at -O3.
+
 	PR target/92723
 	* tree-vect-patterns.c (vect_recog_rotate_pattern): If dt is not
 	vect_internal_def, use oprnd1 as is, without trying to cast it.

gcc/doc/invoke.texi

@@ -9782,8 +9782,8 @@ It is also enabled by @option{-fprofile-use} and @option{-fauto-profile}.
 @item -ftree-loop-distribute-patterns
 @opindex ftree-loop-distribute-patterns
 Perform loop distribution of patterns that can be code generated with
-calls to a library.  This flag is enabled by default at @option{-O3}, and
-by @option{-fprofile-use} and @option{-fauto-profile}.
+calls to a library.  This flag is enabled by default at @option{-O2} and
+higher, and by @option{-fprofile-use} and @option{-fauto-profile}.
 
 This pass distributes the initialization loops and generates a call to
 memset zero.  For example, the loop

gcc/opts.c

@@ -508,6 +508,7 @@ static const struct default_options default_options_table[] =
     { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
     { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
     { OPT_LEVELS_2_PLUS, OPT_finline_functions, NULL, 1 },
+    { OPT_LEVELS_2_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
 
     /* -O2 and above optimizations, but not -Os or -Og.  */
     { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 },
@@ -533,7 +534,6 @@ static const struct default_options default_options_table[] =
     { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
     { OPT_LEVELS_3_PLUS, OPT_fsplit_loops, NULL, 1 },
     { OPT_LEVELS_3_PLUS, OPT_fsplit_paths, NULL, 1 },
-    { OPT_LEVELS_2_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
     { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribution, NULL, 1 },
     { OPT_LEVELS_3_PLUS, OPT_ftree_loop_vectorize, NULL, 1 },
     { OPT_LEVELS_3_PLUS, OPT_ftree_partial_pre, NULL, 1 },