re PR tree-optimization/64494 (ICE at -Os and above on x86_64-linux-gnu in…

re PR tree-optimization/64494 (ICE at -Os and above on x86_64-linux-gnu in duplicate_ssa_name_range_info, at tree-ssanames.c:499)

	PR tree-optimization/64494
	* tree-ssa-loop-im.c (move_computations_dom_walker::before_dom): Also
	clear SSA_NAME_ANTI_RANGE_P flag.

	* gcc.c-torture/compile/pr64494.c: New test.

From-SVN: r219194

gcc/ChangeLog

+2015-01-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/64494
+	* tree-ssa-loop-im.c (move_computations_dom_walker::before_dom): Also
+	clear SSA_NAME_ANTI_RANGE_P flag.
+
 2015-01-05  Marek Polacek  <polacek@redhat.com>
 
 	* doc/extend.texi (Arrays of Length Zero): Add missing comma.

gcc/testsuite/ChangeLog

+2015-01-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/64494
+	* gcc.c-torture/compile/pr64494.c: New test.
+
 2015-01-05  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/47674

gcc/testsuite/gcc.c-torture/compile/pr64494.c

+/* PR tree-optimization/64494 */
+
+int a, b;
+unsigned char c;
+
+int
+main ()
+{
+  int d;
+  a = 0;
+  for (d = 0; d < 2; d++)
+    {
+      a &= (b >= 1);
+      c = (204 > (((unsigned char) ~0) >> a)) ? 0 : 204 << a;
+      b = 0;
+    }
+  return 0;
+}

gcc/tree-ssa-loop-im.c

@@ -1236,7 +1236,11 @@ move_computations_dom_walker::before_dom_children (basic_block bb)
 	  && (!ALWAYS_EXECUTED_IN (bb)
 	      || (ALWAYS_EXECUTED_IN (bb) != level
 		  && !flow_loop_nested_p (ALWAYS_EXECUTED_IN (bb), level))))
-	SSA_NAME_RANGE_INFO (gimple_assign_lhs (new_stmt)) = NULL;
+	{
+	  tree lhs = gimple_assign_lhs (new_stmt);
+	  SSA_NAME_RANGE_INFO (lhs) = NULL;
+	  SSA_NAME_ANTI_RANGE_P (lhs) = 0;
+	}
       gsi_insert_on_edge (loop_preheader_edge (level), new_stmt);
       remove_phi_node (&bsi, false);
     }
@@ -1302,7 +1306,11 @@ move_computations_dom_walker::before_dom_children (basic_block bb)
 	  && (!ALWAYS_EXECUTED_IN (bb)
 	      || !(ALWAYS_EXECUTED_IN (bb) == level
 		   || flow_loop_nested_p (ALWAYS_EXECUTED_IN (bb), level))))
-	SSA_NAME_RANGE_INFO (gimple_get_lhs (stmt)) = NULL;
+	{
+	  tree lhs = gimple_get_lhs (stmt);
+	  SSA_NAME_RANGE_INFO (lhs) = NULL;
+	  SSA_NAME_ANTI_RANGE_P (lhs) = 0;
+	}
       /* In case this is a stmt that is not unconditionally executed
          when the target loop header is executed and the stmt may
 	 invoke undefined integer or pointer overflow rewrite it to