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re PR middle-end/38474 (compile time explosion in dataflow_set_preserve_mem_locs at -O3) 

PR middle-end/38474
	* function.c (free_temp_slots): Only walk the temp slot
	addresses and combine slots if we actually changes something.
	(pop_temp_slots): Ditto.

From-SVN: r155087
This commit is contained in:
Michael Matz 2009-12-08 13:56:06 +00:00 committed by Michael Matz
parent 41a394bbf8
commit 5d7cefe516
2 changed files with 24 additions and 5 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2009-12-08 Michael Matz <matz@suse.de>
PR middle-end/38474
* function.c (free_temp_slots): Only walk the temp slot
addresses and combine slots if we actually changes something.
(pop_temp_slots): Ditto.
2009-12-08 Olga Golovanevsky <olga@il.ibm.com>
PR middle-end/41843

22
gcc/function.c
View File

@ -1164,17 +1164,24 @@ void
free_temp_slots (void)
{
struct temp_slot *p, *next;
bool some_available = false;
for (p = *temp_slots_at_level (temp_slot_level); p; p = next)
{
next = p->next;
if (!p->keep)
make_slot_available (p);
{
make_slot_available (p);
some_available = true;
}
}
remove_unused_temp_slot_addresses ();
combine_temp_slots ();
if (some_available)
{
remove_unused_temp_slot_addresses ();
combine_temp_slots ();
}
}
/* Push deeper into the nesting level for stack temporaries. */
@ -1192,15 +1199,20 @@ void
pop_temp_slots (void)
{
struct temp_slot *p, *next;
bool some_available = false;
for (p = *temp_slots_at_level (temp_slot_level); p; p = next)
{
next = p->next;
make_slot_available (p);
some_available = true;
}
remove_unused_temp_slot_addresses ();
combine_temp_slots ();
if (some_available)
{
remove_unused_temp_slot_addresses ();
combine_temp_slots ();
}
temp_slot_level--;
}