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calls.c (expand_call): Disable tail call generation once rtx_equal_function_value_matters is false.

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* 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.

From-SVN: r33431
This commit is contained in:
Richard Henderson 2000-04-25 17:43:09 -07:00
parent 1cfdcc15ef
commit e2ee991277
3 changed files with 18 additions and 3 deletions
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10
gcc/ChangeLog
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@ -1,4 +1,12 @@
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.

9
gcc/calls.c
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@ -2106,11 +2106,18 @@ expand_call (exp, target, ignore)
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))
{

2
gcc/reg-stack.c
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@ -2550,7 +2550,7 @@ convert_regs_1 (file, block)
/* 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