const-1.c: Update.

	* gcc.dg/const-1.c: Update.
	* gcc.dg/pure-1.c: Update.
	* tree-ssa-loop-niter.c (finite_loop_p): Revamp to be just wrapper of
	max_loop_iterations.

From-SVN: r193175

gcc/ChangeLog

+2012-11-05  Jan Hubicka  <jh@suse.cz>
+
+	* tree-ssa-loop-niter.c (finite_loop_p): Revamp to be just wrapper of
+	max_loop_iterations.
+
 2012-11-05  Joern Rennecke  <joern.rennecke@embecosm.com>
 
 	* reorg.c (fill_simple_delay_slots): Avoid calling optimize_skip

gcc/testsuite/ChangeLog

+2012-11-05  Jan Hubicka  <jh@suse.cz>
+
+	* gcc.dg/const-1.c: Update.
+	* gcc.dg/pure-1.c: Update.
+
 2012-11-05  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/55151

gcc/testsuite/gcc.dg/const-1.c

@@ -35,10 +35,10 @@ foo2b(int n)
 
 /* Unbounded loops are not safe.  */
 static int __attribute__ ((noinline))
-foo3(int n)  /* { dg-warning "const\[^\n\]* normally" "detect const candidate" } */
+foo3(unsigned int n)  /* { dg-warning "const\[^\n\]* normally" "detect const candidate" } */
 {
   int ret = 0;
-  int i;
+  unsigned int i;
   for (i=0; extern_const (i+n); n++)
     ret+=extern_const (i);
   return ret;

gcc/testsuite/gcc.dg/pure-2.c

@@ -35,10 +35,10 @@ foo2b(int n)
 
 /* Unbounded loops are not safe.  */
 static int __attribute__ ((noinline))
-foo3(int n) /* { dg-warning "pure\[^\n\]* normally" "detect pure candidate" } */
+foo3(unsigned int n) /* { dg-warning "pure\[^\n\]* normally" "detect pure candidate" } */
 {
   int ret = 0;
-  int i;
+  unsigned int i;
   for (i=0; extern_const (i+n); n++)
     ret+=extern_const (i);
   return ret;

gcc/tree-ssa-loop-niter.c

@@ -1994,11 +1994,7 @@ find_loop_niter (struct loop *loop, edge *exit)
 bool
 finite_loop_p (struct loop *loop)
 {
-  unsigned i;
-  VEC (edge, heap) *exits;
-  edge ex;
-  struct tree_niter_desc desc;
-  bool finite = false;
+  double_int nit;
   int flags;
 
   if (flag_unsafe_loop_optimizations)
@@ -2012,26 +2008,15 @@ finite_loop_p (struct loop *loop)
       return true;
     }
 
-  exits = get_loop_exit_edges (loop);
-  FOR_EACH_VEC_ELT (edge, exits, i, ex)
+  if (loop->any_upper_bound
+      || max_loop_iterations (loop, &nit))
     {
-      if (!just_once_each_iteration_p (loop, ex->src))
-	continue;
-
-      if (number_of_iterations_exit (loop, ex, &desc, false))
-        {
-	  if (dump_file && (dump_flags & TDF_DETAILS))
-	    {
-	      fprintf (dump_file, "Found loop %i to be finite: iterating ", loop->num);
-	      print_generic_expr (dump_file, desc.niter, TDF_SLIM);
-	      fprintf (dump_file, " times\n");
-	    }
-	  finite = true;
-	  break;
-	}
+      if (dump_file && (dump_flags & TDF_DETAILS))
+	fprintf (dump_file, "Found loop %i to be finite: upper bound found.\n",
+		 loop->num);
+      return true;
     }
-  VEC_free (edge, heap, exits);
-  return finite;
+  return false;
 }
 
 /*