https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61672
Bug ID: 61672
Summary: Less redundant instructions deleted by pre_delete
after r208113.
Product: gcc
Version: 4.10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ysrumyan at gmail dot com
In real application which is compiled with restrictions on frame size after
r208113 number of deleted redundant instruction decreased significantly:
3744 vs 247 and we assume that this is the reason of frame size increasing.
I reproduced this regression using gcc/testsuite/g++.dg/torture/pr58464 for
which we have 8(before fix) vs 4.
r208113 | rguenth | 2014-02-25 12:59:10 +0400 (Tue, 25 Feb 2014) | 10 lines
Changed paths:
M /trunk/gcc/ChangeLog
M /trunk/gcc/emit-rtl.c
2014-02-25 Richard Biener <rguent...@suse.de>
PR middle-end/60291 •emit-rtl.c (mem_attrs_htab): Remove.
(mem_attrs_htab_hash): Likewise.
(mem_attrs_htab_eq): Likewise.
(set_mem_attrs): Always allocate new mem-attrs when something
changed.
(init_emit_once): Do not allocate mem_attrs_htab.
