(collect_iterators): Handle simple expressions quickly.

Don't try to interpret operands that are RTL as if they were trees.

From-SVN: r3616

diff --git a/gcc/c-iterate.c b/gcc/c-iterate.c
index 04d4b7073ff79c7220f6a59e72d2963c42927295..91d9c3598f7afdcf6c8890816d298db009de3888 100644 (file)
--- a/gcc/c-iterate.c
+++ b/gcc/c-iterate.c
@@ -212,14 +212,37 @@ collect_iterators (exp, list)
       switch (TREE_CODE_CLASS (TREE_CODE (exp)))
        {
        case '1':
+         return collect_iterators (TREE_OPERAND (exp, 0), list);
+
        case '2':
        case '<':
+         return collect_iterators (TREE_OPERAND (exp, 0),
+                                   collect_iterators (TREE_OPERAND (exp, 1),
+                                                      list));
+
        case 'e':
        case 'r':
          {
            int num_args = tree_code_length[TREE_CODE (exp)];
            int i;
 
+           /* Some tree codes have RTL, not trees, as operands.  */
+           switch (TREE_CODE (exp))
+             {
+             case SAVE_EXPR:
+             case CALL_EXPR:
+               num_args = 2;
+               break;
+             case METHOD_CALL_EXPR:
+               num_args = 3;
+               break;
+             case WITH_CLEANUP_EXPR:
+               num_args = 1;
+               break;
+             case RTL_EXPR:
+               return list;
+             }
+               
            for (i = 0; i < num_args; i++)
              list = collect_iterators (TREE_OPERAND (exp, i), list);
            return list;