From: Sebastian Pop <sebastian.pop@amd.com>
Date: Mon, 31 Jan 2011 19:30:55 +0000 (+0000)
Subject: Use Alias in common.opt to make -ftree-loop-linear an alias of -floop-interchange.
X-Git-Tag: releases/gcc-4.6.0~843
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7633415cb2c6c35afd15d70a99db3046a3d70349;p=thirdparty%2Fgcc.git

Use Alias in common.opt to make -ftree-loop-linear an alias of -floop-interchange.

2011-01-31  Sebastian Pop  <sebastian.pop@amd.com>

	* common.opt (ftree-loop-linear): Use Alias to make it an alias of
	-floop-interchange.
	* invoke.texi (-ftree-loop-linear): Make it clear that this flag
	is an alias of -floop-interchange and that it requires the
	Graphite infrastructure.
	* tree-ssa-loop.c (gate_graphite_transforms): Do not set
	flag_loop_interchange based on the value of flag_tree_loop_linear.

From-SVN: r169445
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f575543585ce..a17a9a36cd11 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2011-01-31  Sebastian Pop  <sebastian.pop@amd.com>
+
+	* common.opt (ftree-loop-linear): Use Alias to make it an alias of
+	-floop-interchange.
+	* invoke.texi (-ftree-loop-linear): Make it clear that this flag
+	is an alias of -floop-interchange and that it requires the
+	Graphite infrastructure.
+	* tree-ssa-loop.c (gate_graphite_transforms): Do not set
+	flag_loop_interchange based on the value of flag_tree_loop_linear.
+
 2011-01-31  Jakub Jelinek  <jakub@redhat.com>
 	    Richard Guenther  <rguenther@suse.de>
 
diff --git a/gcc/common.opt b/gcc/common.opt
index 12f41b13e88e..aed8dd1a5124 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -1903,8 +1903,8 @@ Common Report Var(flag_tree_loop_im) Init(1) Optimization
 Enable loop invariant motion on trees
 
 ftree-loop-linear
-Common Report Var(flag_tree_loop_linear) Optimization
-Enable linear loop transforms on trees
+Common Alias(floop-interchange)
+Enable loop interchange transforms.  Same as -floop-interchange
 
 ftree-loop-ivcanon
 Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 93e01f87d633..b25d8cf48269 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -6870,8 +6870,10 @@ at @option{-O} and higher.
 
 @item -ftree-loop-linear
 @opindex ftree-loop-linear
-Perform linear loop transformations on tree.  This flag can improve cache
-performance and allow further loop optimizations to take place.
+Perform loop interchange transformations on tree.  Same as
+@option{-floop-interchange}.  To use this code transformation, GCC has
+to be configured with @option{--with-ppl} and @option{--with-cloog} to
+enable the Graphite loop transformation infrastructure.
 
 @item -floop-interchange
 @opindex floop-interchange
diff --git a/gcc/tree-ssa-loop.c b/gcc/tree-ssa-loop.c
index 5534b6a515ae..656d2b6a8e00 100644
--- a/gcc/tree-ssa-loop.c
+++ b/gcc/tree-ssa-loop.c
@@ -266,17 +266,12 @@ gate_graphite_transforms (void)
      is turned on.  */
   if (flag_loop_block
       || flag_loop_interchange
-      || flag_tree_loop_linear
       || flag_loop_strip_mine
       || flag_graphite_identity
       || flag_loop_parallelize_all
       || flag_loop_flatten)
     flag_graphite = 1;
 
-  /* Make flag_tree_loop_linear an alias of flag_loop_interchange.  */
-  if (flag_tree_loop_linear)
-    flag_loop_interchange = flag_tree_loop_linear;
-
   return flag_graphite != 0;
 }