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re PR debug/60381 (ICE: in vt_expand_var_loc_chain, at var-tracking.c:8245)

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PR debug/60381
Revert:
2014-02-28  Alexandre Oliva <aoliva@redhat.com>
PR debug/59992
* cselib.c (remove_useless_values): Skip to avoid quadratic
behavior if the condition moved from...
(cselib_process_insn): ... here holds.

From-SVN: r208361
This commit is contained in:
Alexandre Oliva 2014-03-06 07:04:47 +00:00 • committed by Alexandre Oliva
parent 700bf0d312
commit 80662856d2
2 changed files with 17 additions and 9 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2014-03-06 Alexandre Oliva <aoliva@redhat.com>
PR debug/60381
Revert:
2014-02-28 Alexandre Oliva <aoliva@redhat.com>
PR debug/59992
* cselib.c (remove_useless_values): Skip to avoid quadratic
behavior if the condition moved from...
(cselib_process_insn): ... here holds.
2014-03-05 Jakub Jelinek <jakub@redhat.com>
PR plugins/59335

16
gcc/cselib.c
View file

@ -681,14 +681,6 @@ remove_useless_values (void)
{
cselib_val **p, *v;
if (n_useless_values <= MAX_USELESS_VALUES
/* remove_useless_values is linear in the hash table size. Avoid
quadratic behavior for very large hashtables with very few
useless elements. */
|| ((unsigned int)n_useless_values
<= (cselib_hash_table.elements () - n_debug_values) / 4))
return;
/* First pass: eliminate locations that reference the value. That in
turn can make more values useless. */
do
@ -2720,7 +2712,13 @@ cselib_process_insn (rtx insn)
cselib_current_insn = NULL_RTX;
remove_useless_values ();
if (n_useless_values > MAX_USELESS_VALUES
/* remove_useless_values is linear in the hash table size. Avoid
quadratic behavior for very large hashtables with very few
useless elements. */
&& ((unsigned int)n_useless_values
> (cselib_hash_table.elements () - n_debug_values) / 4))
remove_useless_values ();
}
/* Initialize cselib for one pass. The caller must also call