diff gcc/tree-ssa-loop-unswitch.c @ 63:b7f97abdc517 gcc-4.6-20100522

update gcc from gcc-4.5.0 to gcc-4.6
author ryoma <e075725@ie.u-ryukyu.ac.jp>
date Mon, 24 May 2010 12:47:05 +0900
parents 77e2b8dfacca
children f6334be47118
line wrap: on
line diff
--- a/gcc/tree-ssa-loop-unswitch.c	Fri Feb 12 23:41:23 2010 +0900
+++ b/gcc/tree-ssa-loop-unswitch.c	Mon May 24 12:47:05 2010 +0900
@@ -22,9 +22,7 @@
 #include "coretypes.h"
 #include "tm.h"
 #include "tree.h"
-#include "rtl.h"
 #include "tm_p.h"
-#include "hard-reg-set.h"
 #include "basic-block.h"
 #include "output.h"
 #include "diagnostic.h"
@@ -88,6 +86,26 @@
   /* Go through inner loops (only original ones).  */
   FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
     {
+      if (dump_file && (dump_flags & TDF_DETAILS))
+        fprintf (dump_file, ";; Considering loop %d\n", loop->num);
+
+      /* Do not unswitch in cold regions. */
+      if (optimize_loop_for_size_p (loop))
+        {
+          if (dump_file && (dump_flags & TDF_DETAILS))
+            fprintf (dump_file, ";; Not unswitching cold loops\n");
+          continue;
+        }
+
+      /* The loop should not be too large, to limit code growth. */
+      if (tree_num_loop_insns (loop, &eni_size_weights)
+          > (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))
+        {
+          if (dump_file && (dump_flags & TDF_DETAILS))
+            fprintf (dump_file, ";; Not unswitching, loop too big\n");
+          continue;
+        }
+
       changed |= tree_unswitch_single_loop (loop, 0);
     }
 
@@ -189,31 +207,6 @@
       return false;
     }
 
-  /* Only unswitch innermost loops.  */
-  if (loop->inner)
-    {
-      if (dump_file && (dump_flags & TDF_DETAILS))
-	fprintf (dump_file, ";; Not unswitching, not innermost loop\n");
-      return false;
-    }
-
-  /* Do not unswitch in cold regions.  */
-  if (optimize_loop_for_size_p (loop))
-    {
-      if (dump_file && (dump_flags & TDF_DETAILS))
-	fprintf (dump_file, ";; Not unswitching cold loops\n");
-      return false;
-    }
-
-  /* The loop should not be too large, to limit code growth.  */
-  if (tree_num_loop_insns (loop, &eni_size_weights)
-      > (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))
-    {
-      if (dump_file && (dump_flags & TDF_DETAILS))
-	fprintf (dump_file, ";; Not unswitching, loop too big\n");
-      return false;
-    }
-
   i = 0;
   bbs = get_loop_body (loop);