From: Jan Hubicka <jh@suse.cz>
Date: Sun, 4 Nov 2012 15:51:18 +0000 (+0100)
Subject: invoke.texi (profile-use): update documentation.
X-Git-Tag: releases/gcc-4.8.0~2297
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f56f2d332c6f78342a8f52ab426c38806d772017;p=thirdparty%2Fgcc.git

invoke.texi (profile-use): update documentation.


	* invoke.texi (profile-use): update documentation.
	* opts.c (common_handle_option): Enable tree-vectorize
	and tree-loop-distribute-patterns.
	* tree-loop-distribution.c (tree_loop_distribution): Skip loops
	optimized for size.
	* config/i386/i386.c (ix86_option_override_internal): Enabe
	prefetch_lop_arrays for profile-use.

From-SVN: r193135
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b2b4394f20bd..6367ac578de0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2012-11-03  Jan Hubicka  <jh@suse.cz>
+
+	* invoke.texi (profile-use): update documentation.
+	* opts.c (common_handle_option): Enable tree-vectorize
+	and tree-loop-distribute-patterns.
+	* tree-loop-distribution.c (tree_loop_distribution): Skip loops
+	optimized for size.
+	* config/i386/i386.c (ix86_option_override_internal): Enabe
+	prefetch_lop_arrays for profile-use.
+
 2012-11-03  Robert Mason  <rbmj@verizon.net>
 
 	* gcov-io.c (gcov_open): Add file mode to open call (need for VxWorks)
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index fae300e4ce18..833ef5ca57da 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -3950,7 +3950,7 @@ ix86_option_override_internal (bool main_args_p)
   /* Enable sw prefetching at -O3 for CPUS that prefetching is helpful.  */
   if (flag_prefetch_loop_arrays < 0
       && HAVE_prefetch
-      && optimize >= 3
+      && (optimize >= 3 || flag_profile_use)
       && TARGET_SOFTWARE_PREFETCHING_BENEFICIAL)
     flag_prefetch_loop_arrays = 1;
 
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index ff0c87dc6c4f..1338e6e461cf 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -8409,7 +8409,8 @@ Enable profile feedback directed optimizations, and optimizations
 generally profitable only with profile feedback available.
 
 The following options are enabled: @code{-fbranch-probabilities}, @code{-fvpt},
-@code{-funroll-loops}, @code{-fpeel-loops}, @code{-ftracer}
+@code{-funroll-loops}, @code{-fpeel-loops}, @code{-ftracer}, @code{-ftree-vectorize},
+@code{ftree-loop-distribute-patterns}
 
 By default, GCC emits an error message if the feedback profiles do not
 match the source code.  This error can be turned into a warning by using
diff --git a/gcc/opts.c b/gcc/opts.c
index a1cf2d5bae60..3160b8cc521e 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -1587,6 +1587,12 @@ common_handle_option (struct gcc_options *opts,
 	opts->x_flag_unswitch_loops = value;
       if (!opts_set->x_flag_gcse_after_reload)
 	opts->x_flag_gcse_after_reload = value;
+      if (!opts_set->x_flag_tree_vectorize)
+	opts->x_flag_tree_vectorize = value;
+      if (!opts_set->x_flag_vect_cost_model)
+	opts->x_flag_vect_cost_model = value;
+      if (!opts_set->x_flag_tree_loop_distribute_patterns)
+	opts->x_flag_tree_loop_distribute_patterns = value;
       break;
 
     case OPT_fprofile_generate_:
diff --git a/gcc/tree-loop-distribution.c b/gcc/tree-loop-distribution.c
index 10bd29e3d5f7..0ade107bd594 100644
--- a/gcc/tree-loop-distribution.c
+++ b/gcc/tree-loop-distribution.c
@@ -1511,6 +1511,10 @@ tree_loop_distribution (void)
       if (!single_exit (loop))
 	continue;
 
+      /* Only optimize hot loops.  */
+      if (!optimize_loop_for_speed_p (loop))
+	continue;
+
       /* Only distribute loops with a header and latch for now.  */
       if (loop->num_nodes > 2)
 	continue;