+2007-03-19 Jeff Law <law@redhat.com>
+
+ * tree-cfg.c (find_taken_edge): Tighten conditions for
+ optimizing computed gotos.
+
2007-03-19 Michael Matz <matz@suse.de>
* builtins.c (expand_builtin_sync_operation,
+2007-03-19 Jeff Law <law@redhat.com>
+
+ * PR tree-optimization/30984
+ * gcc.c-torture/pr30984.c: New test.
+
2007-03-19 Andrew Pinski <andrew_pinski@playstation.sony.com>
Richard Guenther <rguenther@suse.de>
return find_taken_edge_switch_expr (bb, val);
if (computed_goto_p (stmt))
- return find_taken_edge_computed_goto (bb, TREE_OPERAND( val, 0));
+ {
+ /* Only optimize if the argument is a label, if the argument is
+ not a label then we can not construct a proper CFG.
+
+ It may be the case that we only need to allow the LABEL_REF to
+ appear inside an ADDR_EXPR, but we also allow the LABEL_REF to
+ appear inside a LABEL_EXPR just to be safe. */
+ if ((TREE_CODE (val) == ADDR_EXPR || TREE_CODE (val) == LABEL_EXPR)
+ && TREE_CODE (TREE_OPERAND (val, 0)) == LABEL_DECL)
+ return find_taken_edge_computed_goto (bb, TREE_OPERAND (val, 0));
+ return NULL;
+ }
gcc_unreachable ();
}