common.opt (funsafe-loop-optimizations): Mark ignore.

	* common.opt (funsafe-loop-optimizations): Mark ignore.
	* doc/invoke.texi (funsafe-loop-optimizations): Remove.
	* loop-iv.c (get_simple_loop_desc): Remove unsafe-loop-optimizations
	related code.
	* tree-ssa-loop-niter.c (finite_loop_p): Ditto.
	* config/bfin/bfin.c (bfin_can_use_doloop_p): Ditto.

From-SVN: r238642

1 files changed, 0 insertions, 36 deletions

diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c
index 68cfd0ef9c8..78bec9e8521 100644
--- a/gcc/loop-iv.c
+++ b/gcc/loop-iv.c
@@ -3027,42 +3027,6 @@ get_simple_loop_desc (struct loop *loop)
   iv_analysis_loop_init (loop);
   find_simple_exit (loop, desc);
   loop->simple_loop_desc = desc;
-
-  if (desc->simple_p && (desc->assumptions || desc->infinite))
-    {
-      const char *wording;
-
-      /* Assume that no overflow happens and that the loop is finite.
-	 We already warned at the tree level if we ran optimizations there.  */
-      if (!flag_tree_loop_optimize && warn_unsafe_loop_optimizations)
-	{
-	  if (desc->infinite)
-	    {
-	      wording =
-		flag_unsafe_loop_optimizations
-		? N_("assuming that the loop is not infinite")
-		: N_("cannot optimize possibly infinite loops");
-	      warning (OPT_Wunsafe_loop_optimizations, "%s",
-		       gettext (wording));
-	    }
-	  if (desc->assumptions)
-	    {
-	      wording =
-		flag_unsafe_loop_optimizations
-		? N_("assuming that the loop counter does not overflow")
-		: N_("cannot optimize loop, the loop counter may overflow");
-	      warning (OPT_Wunsafe_loop_optimizations, "%s",
-		       gettext (wording));
-	    }
-	}
-
-      if (flag_unsafe_loop_optimizations && single_exit (loop))
-	{
-	  desc->assumptions = NULL_RTX;
-	  desc->infinite = NULL_RTX;
-	}
-    }
-
   return desc;
 }