re PR middle-end/46360 (ICE in release_defs, at tree-ssanames.c:313)

	PR middle-end/46360
	* tree-ssa-propagate.c (update_call_from_tree): Fix for use
	not in SSA mode.

	* gcc.c-torture/compile/pr46360.c: New test.

From-SVN: r166482

gcc/ChangeLog

+2010-11-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/46360
+	* tree-ssa-propagate.c (update_call_from_tree): Fix for use
+	not in SSA mode.
+
 2010-11-09  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/46221

gcc/testsuite/ChangeLog

 2010-11-09  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/46360
+	* gcc.c-torture/compile/pr46360.c: New test.
+
 	PR c++/45894
 	* g++.dg/warn/Wsequence-point-2.C: New test.
 

gcc/testsuite/gcc.c-torture/compile/pr46360.c

+/* PR middle-end/46360 */
+
+__attribute__((gnu_inline, always_inline)) extern inline char *
+strncpy (char *dest, const char *src, __SIZE_TYPE__ len)
+{
+  return __builtin_strncpy (dest, src, len);
+}
+
+void
+foo (char *s)
+{
+  strncpy (s, "", 0);
+}

gcc/tree-ssa-propagate.c

@@ -760,8 +760,11 @@ update_call_from_tree (gimple_stmt_iterator *si_p, tree expr)
           /* No value is expected, and EXPR has no effect.
              Replace it with an empty statement.  */
           new_stmt = gimple_build_nop ();
-	  unlink_stmt_vdef (stmt);
-	  release_defs (stmt);
+	  if (gimple_in_ssa_p (cfun))
+	    {
+	      unlink_stmt_vdef (stmt);
+	      release_defs (stmt);
+	    }
         }
       else
         {
@@ -773,7 +776,8 @@ update_call_from_tree (gimple_stmt_iterator *si_p, tree expr)
           lhs = create_tmp_var (TREE_TYPE (expr), NULL);
           new_stmt = gimple_build_assign (lhs, expr);
           add_referenced_var (lhs);
-          lhs = make_ssa_name (lhs, new_stmt);
+	  if (gimple_in_ssa_p (cfun))
+	    lhs = make_ssa_name (lhs, new_stmt);
           gimple_assign_set_lhs (new_stmt, lhs);
 	  gimple_set_vuse (new_stmt, gimple_vuse (stmt));
 	  gimple_set_vdef (new_stmt, gimple_vdef (stmt));