public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x
@ 2012-02-14 8:34 krebbel at gcc dot gnu.org
2012-02-14 8:35 ` [Bug tree-optimization/52242] " krebbel at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: krebbel at gcc dot gnu.org @ 2012-02-14 8:34 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52242
Bug #: 52242
Summary: [4.7 regression] libgomp.c/atomic-2.c failure on s390x
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: krebbel@gcc.gnu.org
181748 rth /* ??? Assume BIGGEST_ALIGNMENT *is* aligned. */
181748 rth if (exact_log2 (align) >= index
181748 rth || align * BITS_PER_UNIT >= BIGGEST_ALIGNMENT)
That broke the atomic-2.c libgomp testcase on s390x. We have
BIGGEST_ALIGNMENT of 64. A 128 bit long double does not need to be
aligned better than 64 bit in memory. However, the 128bit compare and
swap instruction we have requires the operands to be naturally
aligned. In the testcase a compare and swap double instruction is used
on a long double value which is only 8 byte aligned in memory.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug tree-optimization/52242] [4.7 regression] libgomp.c/atomic-2.c failure on s390x 2012-02-14 8:34 [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x krebbel at gcc dot gnu.org @ 2012-02-14 8:35 ` krebbel at gcc dot gnu.org 2012-02-14 12:12 ` rguenth at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2012-02-14 8:35 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52242 Andreas Krebbel <krebbel at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |s390x-ibm-linux Priority|P3 |P2 Host| |s390x-ibm-linux Build| |s390x-ibm-linux ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/52242] [4.7 regression] libgomp.c/atomic-2.c failure on s390x 2012-02-14 8:34 [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x krebbel at gcc dot gnu.org 2012-02-14 8:35 ` [Bug tree-optimization/52242] " krebbel at gcc dot gnu.org @ 2012-02-14 12:12 ` rguenth at gcc dot gnu.org 2012-03-05 19:13 ` [Bug tree-optimization/52242] [4.7/4.8 " rth at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2012-02-14 12:12 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52242 Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rth at gcc dot gnu.org Target Milestone|--- |4.7.0 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/52242] [4.7/4.8 regression] libgomp.c/atomic-2.c failure on s390x 2012-02-14 8:34 [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x krebbel at gcc dot gnu.org 2012-02-14 8:35 ` [Bug tree-optimization/52242] " krebbel at gcc dot gnu.org 2012-02-14 12:12 ` rguenth at gcc dot gnu.org @ 2012-03-05 19:13 ` rth at gcc dot gnu.org 2012-03-05 19:52 ` rth at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu.org @ 2012-03-05 19:13 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52242 Richard Henderson <rth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2012-03-05 AssignedTo|unassigned at gcc dot |rth at gcc dot gnu.org |gnu.org | Ever Confirmed|0 |1 --- Comment #1 from Richard Henderson <rth at gcc dot gnu.org> 2012-03-05 19:13:10 UTC --- Mine. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/52242] [4.7/4.8 regression] libgomp.c/atomic-2.c failure on s390x 2012-02-14 8:34 [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x krebbel at gcc dot gnu.org ` (2 preceding siblings ...) 2012-03-05 19:13 ` [Bug tree-optimization/52242] [4.7/4.8 " rth at gcc dot gnu.org @ 2012-03-05 19:52 ` rth at gcc dot gnu.org 2012-03-05 19:54 ` rth at gcc dot gnu.org 2012-03-05 20:04 ` rth at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu.org @ 2012-03-05 19:52 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52242 --- Comment #2 from Richard Henderson <rth at gcc dot gnu.org> 2012-03-05 19:52:19 UTC --- Author: rth Date: Mon Mar 5 19:52:08 2012 New Revision: 184955 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184955 Log: PR tree-opt/52242 Revert: 2011-11-26 Richard Henderson <rth@redhat.com> * omp-low.c (expand_omp_atomic): Assume anything aligned to BIGGEST_ALIGNMENT is aligned. Modified: trunk/gcc/ChangeLog trunk/gcc/omp-low.c ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/52242] [4.7/4.8 regression] libgomp.c/atomic-2.c failure on s390x 2012-02-14 8:34 [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x krebbel at gcc dot gnu.org ` (3 preceding siblings ...) 2012-03-05 19:52 ` rth at gcc dot gnu.org @ 2012-03-05 19:54 ` rth at gcc dot gnu.org 2012-03-05 20:04 ` rth at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu.org @ 2012-03-05 19:54 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52242 --- Comment #3 from Richard Henderson <rth at gcc dot gnu.org> 2012-03-05 19:54:02 UTC --- Author: rth Date: Mon Mar 5 19:53:54 2012 New Revision: 184956 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184956 Log: PR tree-opt/52242 Revert: 2011-11-26 Richard Henderson <rth@redhat.com> * omp-low.c (expand_omp_atomic): Assume anything aligned to BIGGEST_ALIGNMENT is aligned. Modified: branches/gcc-4_7-branch/gcc/ChangeLog branches/gcc-4_7-branch/gcc/omp-low.c ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/52242] [4.7/4.8 regression] libgomp.c/atomic-2.c failure on s390x 2012-02-14 8:34 [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x krebbel at gcc dot gnu.org ` (4 preceding siblings ...) 2012-03-05 19:54 ` rth at gcc dot gnu.org @ 2012-03-05 20:04 ` rth at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu.org @ 2012-03-05 20:04 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52242 Richard Henderson <rth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #4 from Richard Henderson <rth at gcc dot gnu.org> 2012-03-05 20:03:52 UTC --- Fixed. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2012-03-05 20:04 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-02-14 8:34 [Bug tree-optimization/52242] New: [4.7 regression] libgomp.c/atomic-2.c failure on s390x krebbel at gcc dot gnu.org 2012-02-14 8:35 ` [Bug tree-optimization/52242] " krebbel at gcc dot gnu.org 2012-02-14 12:12 ` rguenth at gcc dot gnu.org 2012-03-05 19:13 ` [Bug tree-optimization/52242] [4.7/4.8 " rth at gcc dot gnu.org 2012-03-05 19:52 ` rth at gcc dot gnu.org 2012-03-05 19:54 ` rth at gcc dot gnu.org 2012-03-05 20:04 ` rth at gcc dot gnu.org
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).