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* [Bug c/45052] New: [4.5 regression] volatile ignored
@ 2010-07-24 10:51 a dot kaiser at gmx dot net
2010-07-24 10:52 ` [Bug c/45052] " a dot kaiser at gmx dot net
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: a dot kaiser at gmx dot net @ 2010-07-24 10:51 UTC (permalink / raw)
To: gcc-bugs
"volatile" seems to have no effect. ReadByte should be called 4 times with
results merged in a word, instead it is called once and replicated 4 times.
arm-none-eabi-gcc -S -Os -mcpu=arm926ej-s src.c
-O0, -O2, -O3 are fine, -O1 and -Os are bad.
--
Summary: [4.5 regression] volatile ignored
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: a dot kaiser at gmx dot net
GCC host triplet: yagarto 01.05.2010
GCC target triplet: arm-none-eabi
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug c/45052] [4.5 regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net @ 2010-07-24 10:52 ` a dot kaiser at gmx dot net 2010-07-24 10:54 ` a dot kaiser at gmx dot net ` (6 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: a dot kaiser at gmx dot net @ 2010-07-24 10:52 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from a dot kaiser at gmx dot net 2010-07-24 10:52 ------- Created an attachment (id=21297) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21297&action=view) Source code -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c/45052] [4.5 regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net 2010-07-24 10:52 ` [Bug c/45052] " a dot kaiser at gmx dot net @ 2010-07-24 10:54 ` a dot kaiser at gmx dot net 2010-07-24 11:44 ` a dot kaiser at gmx dot net ` (5 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: a dot kaiser at gmx dot net @ 2010-07-24 10:54 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from a dot kaiser at gmx dot net 2010-07-24 10:53 ------- Created an attachment (id=21298) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21298&action=view) Bad result -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c/45052] [4.5 regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net 2010-07-24 10:52 ` [Bug c/45052] " a dot kaiser at gmx dot net 2010-07-24 10:54 ` a dot kaiser at gmx dot net @ 2010-07-24 11:44 ` a dot kaiser at gmx dot net 2010-07-24 14:37 ` [Bug tree-optimization/45052] [4.5/4.6 Regression] " rguenth at gcc dot gnu dot org ` (4 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: a dot kaiser at gmx dot net @ 2010-07-24 11:44 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from a dot kaiser at gmx dot net 2010-07-24 11:44 ------- Also fine: -Os -fno-ipa-pure-const -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/45052] [4.5/4.6 Regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net ` (2 preceding siblings ...) 2010-07-24 11:44 ` a dot kaiser at gmx dot net @ 2010-07-24 14:37 ` rguenth at gcc dot gnu dot org 2010-07-26 9:27 ` rguenth at gcc dot gnu dot org ` (3 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: rguenth at gcc dot gnu dot org @ 2010-07-24 14:37 UTC (permalink / raw) To: gcc-bugs ------- Comment #4 from rguenth at gcc dot gnu dot org 2010-07-24 14:37 ------- Confirmed. I have a patch. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot |dot org |org Status|UNCONFIRMED |ASSIGNED Component|c |tree-optimization Ever Confirmed|0 |1 Keywords| |wrong-code Last reconfirmed|0000-00-00 00:00:00 |2010-07-24 14:37:40 date| | Summary|[4.5 regression] volatile |[4.5/4.6 Regression] |ignored |volatile ignored Target Milestone|--- |4.5.1 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/45052] [4.5/4.6 Regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net ` (3 preceding siblings ...) 2010-07-24 14:37 ` [Bug tree-optimization/45052] [4.5/4.6 Regression] " rguenth at gcc dot gnu dot org @ 2010-07-26 9:27 ` rguenth at gcc dot gnu dot org 2010-07-31 9:35 ` [Bug tree-optimization/45052] [4.5 " rguenth at gcc dot gnu dot org ` (2 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: rguenth at gcc dot gnu dot org @ 2010-07-26 9:27 UTC (permalink / raw) To: gcc-bugs ------- Comment #5 from rguenth at gcc dot gnu dot org 2010-07-26 09:27 ------- Subject: Bug 45052 Author: rguenth Date: Mon Jul 26 09:26:43 2010 New Revision: 162528 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=162528 Log: 2010-07-26 Richard Guenther <rguenther@suse.de> PR tree-optimization/45052 * ipa-pure-const.c (check_stmt): Check volatileness. Modified: trunk/gcc/ChangeLog trunk/gcc/ipa-pure-const.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/45052] [4.5 Regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net ` (4 preceding siblings ...) 2010-07-26 9:27 ` rguenth at gcc dot gnu dot org @ 2010-07-31 9:35 ` rguenth at gcc dot gnu dot org 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org 7 siblings, 0 replies; 9+ messages in thread From: rguenth at gcc dot gnu dot org @ 2010-07-31 9:35 UTC (permalink / raw) To: gcc-bugs ------- Comment #6 from rguenth at gcc dot gnu dot org 2010-07-31 09:30 ------- GCC 4.5.1 is being released, adjusting target milestone. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.5.1 |4.5.2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/45052] [4.5 Regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net ` (5 preceding siblings ...) 2010-07-31 9:35 ` [Bug tree-optimization/45052] [4.5 " rguenth at gcc dot gnu dot org @ 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org 7 siblings, 0 replies; 9+ messages in thread From: rguenth at gcc dot gnu dot org @ 2010-07-31 12:13 UTC (permalink / raw) To: gcc-bugs ------- Comment #8 from rguenth at gcc dot gnu dot org 2010-07-31 12:13 ------- Subject: Bug 45052 Author: rguenth Date: Sat Jul 31 12:12:43 2010 New Revision: 162781 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=162781 Log: 2010-07-31 Richard Guenther <rguenther@suse.de> PR tree-optimization/45052 * ipa-pure-const.c (check_stmt): Check volatileness. Modified: branches/gcc-4_5-branch/gcc/ChangeLog branches/gcc-4_5-branch/gcc/ipa-pure-const.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/45052] [4.5 Regression] volatile ignored 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net ` (6 preceding siblings ...) 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org @ 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org 7 siblings, 0 replies; 9+ messages in thread From: rguenth at gcc dot gnu dot org @ 2010-07-31 12:13 UTC (permalink / raw) To: gcc-bugs ------- Comment #7 from rguenth at gcc dot gnu dot org 2010-07-31 12:12 ------- Fixed. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Known to fail|4.5.0 |4.5.0 4.5.1 Known to work|4.3.2 4.4.1 4.4.2 4.6.0 |4.3.2 4.4.1 4.4.2 4.5.2 | |4.6.0 Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45052 ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2010-07-31 12:13 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2010-07-24 10:51 [Bug c/45052] New: [4.5 regression] volatile ignored a dot kaiser at gmx dot net 2010-07-24 10:52 ` [Bug c/45052] " a dot kaiser at gmx dot net 2010-07-24 10:54 ` a dot kaiser at gmx dot net 2010-07-24 11:44 ` a dot kaiser at gmx dot net 2010-07-24 14:37 ` [Bug tree-optimization/45052] [4.5/4.6 Regression] " rguenth at gcc dot gnu dot org 2010-07-26 9:27 ` rguenth at gcc dot gnu dot org 2010-07-31 9:35 ` [Bug tree-optimization/45052] [4.5 " rguenth at gcc dot gnu dot org 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org 2010-07-31 12:13 ` rguenth at gcc dot gnu dot org
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