-2000-04-26 Jason Merrill <jason@casey.cygnus.com>
+2000-04-25 Richard Henderson <rth@cygnus.com>
+
+ * calls.c (expand_call): Disable tail call generation once
+ rtx_equal_function_value_matters is false.
+
+ * reg-stack.c (convert_regs_1): Treat EDGE_ABNORMAL_CALL edges
+ like EDGE_EH edges.
+
+2000-04-25 Jason Merrill <jason@casey.cygnus.com>
* dwarf2out.c (add_bound_info): Don't crash on an unexpanded SAVE_EXPR.
pushed these optimizations into -O2. Don't try if we're already
expanding a call, as that means we're an argument. Similarly, if
there's pending loops or cleanups we know there's code to follow
- the call. */
+ the call.
+
+ If rtx_equal_function_value_matters is false, that means we've
+ finished with regular parsing. Which means that some of the
+ machinery we use to generate tail-calls is no longer in place.
+ This is most often true of sjlj-exceptions, which we couldn't
+ tail-call to anyway. */
try_tail_call = 0;
if (flag_optimize_sibling_calls
&& currently_expanding_call == 1
+ && rtx_equal_function_value_matters
&& stmt_loop_nest_empty ()
&& ! any_pending_cleanups (1))
{
/* Care for EH edges specially. The normal return path may return
a value in st(0), but the EH path will not, and there's no need
to add popping code to the edge. */
- if (e->flags & EDGE_EH)
+ if (e->flags & (EDGE_EH | EDGE_ABNORMAL_CALL))
{
/* Assert that the lifetimes are as we expect -- one value
live at st(0) on the end of the source block, and no