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except.c (find_exception_handler_labels_1): New function.

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* except.c (find_exception_handler_labels_1): New function.
	(find_exception_handler_labels): Split into two functions, dive
	into CALL_PLACEHOLDERs when looking for exception handler labels.

From-SVN: r33849
This commit is contained in:
Jakub Jelinek 2000-05-11 16:20:31 +02:00 • committed by Jakub Jelinek
parent 36348eab5d
commit f19c9228fc
2 changed files with 37 additions and 15 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2000-05-11 Jakub Jelinek <jakub@redhat.com>
* except.c (find_exception_handler_labels_1): New function.
(find_exception_handler_labels): Split into two functions, dive
into CALL_PLACEHOLDERs when looking for exception handler labels.
2000-05-11 Stan Cox <scox@cygnus.com>
* regrename.c (replace_reg_in_block): Improve REG_DEAD handling.

46
gcc/except.c
View file

@ -2388,27 +2388,18 @@ emit_eh_context ()
}
}
/* Scan the current insns and build a list of handler labels. The
resulting list is placed in the global variable exception_handler_labels.
/* Scan the insn chain F and build a list of handler labels. The
resulting list is placed in the global variable exception_handler_labels. */
It is called after the last exception handling region is added to
the current function (when the rtl is almost all built for the
current function) and before the jump optimization pass. */
void
find_exception_handler_labels ()
static void
find_exception_handler_labels_1 (f)
rtx f;
{
rtx insn;
exception_handler_labels = NULL_RTX;
/* If we aren't doing exception handling, there isn't much to check. */
if (! doing_eh (0))
return;
/* For each start of a region, add its label to the list. */
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
for (insn = f; insn; insn = NEXT_INSN (insn))
{
struct handler_info* ptr;
if (GET_CODE (insn) == NOTE
@ -2427,9 +2418,34 @@ find_exception_handler_labels ()
ptr->handler_label, exception_handler_labels);
}
}
else if (GET_CODE (insn) == CALL_INSN
&& GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
{
find_exception_handler_labels_1 (XEXP (PATTERN (insn), 0));
find_exception_handler_labels_1 (XEXP (PATTERN (insn), 1));
find_exception_handler_labels_1 (XEXP (PATTERN (insn), 2));
}
}
}
/* Scan the current insns and build a list of handler labels. The
resulting list is placed in the global variable exception_handler_labels.
It is called after the last exception handling region is added to
the current function (when the rtl is almost all built for the
current function) and before the jump optimization pass. */
void
find_exception_handler_labels ()
{
exception_handler_labels = NULL_RTX;
/* If we aren't doing exception handling, there isn't much to check. */
if (! doing_eh (0))
return;
find_exception_handler_labels_1 (get_insns ());
}
/* Return a value of 1 if the parameter label number is an exception handler
label. Return 0 otherwise. */