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* [Bug driver/11368] New: -falign-* has no effect on i386
@ 2003-06-29 10:34 debian-gcc at lists dot debian dot org
2003-06-29 12:41 ` [Bug optimization/11368] " pinskia at physics dot uc dot edu
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: debian-gcc at lists dot debian dot org @ 2003-06-29 10:34 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
Summary: -falign-* has no effect on i386
Product: gcc
Version: 3.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: driver
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: debian-gcc at lists dot debian dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i386-linux
GCC host triplet: i386-linux
GCC target triplet: i386-linux
[forwarded from http://bugs.debian.org/198269]
Compiling the following program (b.c) on i386
int f(int a) {
int i = 0;
if (a > 3)
goto end;
return 3;
end:
return g(0);
}
with "gcc -O2 -falign-jumps=0 -S" produces
.file "b.c"
.text
.p2align 2,,3
.globl f
.type f, @function
f:
pushl %ebp
movl %esp, %ebp
cmpl $3, 8(%ebp)
jle .L4
.L3:
movl $0, 8(%ebp)
leave
jmp g
.p2align 2,,3
.L4:
movl $3, %eax
leave
ret
.size f, .-f
.ident "GCC: (GNU) 3.3 (Debian)"
As you can see, -falign-jumps=0 was ignored. -malign-jumps=0 does
work on the other hand. This applies to all -falign-* options.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
2003-06-29 12:41 ` [Bug optimization/11368] " pinskia at physics dot uc dot edu
@ 2003-06-29 12:41 ` pinskia at physics dot uc dot edu
2003-07-05 15:53 ` pinskia at physics dot uc dot edu
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-06-29 12:41 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Last reconfirmed|2003-06-29 12:41:13 |2003-06-29 12:41:26
date| |
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
@ 2003-06-29 12:41 ` pinskia at physics dot uc dot edu
2003-06-29 12:41 ` pinskia at physics dot uc dot edu
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-06-29 12:41 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |pinskia at physics dot uc
|dot org |dot edu
Status|UNCONFIRMED |NEW
Component|driver |optimization
Ever Confirmed| |1
Keywords| |documentation
Last reconfirmed|0000-00-00 00:00:00 |2003-06-29 12:41:13
date| |
------- Additional Comments From pinskia at physics dot uc dot edu 2003-06-29 12:41 -------
To not align loops with -falign-* use 1 as the alignment (like the documentation says to
do at least for align-functions but it applies for all of them), since it use n not 2^n, unlike -
malign-*. See the documentation, there is one thing the documenation should say but
does not:
If n is not specified (or is zero), use a machine-dependent default.
The or is zero part is not there I will sumbit a patch for and resync all the -falign-* options
sos they look the same.
This is case where the documentation is not clear but I will change that.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
2003-06-29 12:41 ` [Bug optimization/11368] " pinskia at physics dot uc dot edu
2003-06-29 12:41 ` pinskia at physics dot uc dot edu
@ 2003-07-05 15:53 ` pinskia at physics dot uc dot edu
2003-07-05 17:14 ` pinskia at physics dot uc dot edu
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-05 15:53 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|pinskia at physics dot uc |unassigned at gcc dot gnu
|dot edu |dot org
Status|ASSIGNED |NEW
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
` (2 preceding siblings ...)
2003-07-05 15:53 ` pinskia at physics dot uc dot edu
@ 2003-07-05 17:14 ` pinskia at physics dot uc dot edu
2003-07-05 17:15 ` pinskia at physics dot uc dot edu
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-05 17:14 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |pinskia at physics dot uc
|dot org |dot edu
Status|NEW |ASSIGNED
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
` (3 preceding siblings ...)
2003-07-05 17:14 ` pinskia at physics dot uc dot edu
@ 2003-07-05 17:15 ` pinskia at physics dot uc dot edu
2003-07-07 4:56 ` pinskia at physics dot uc dot edu
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-05 17:15 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-05 17:15 -------
Updated patch submitted: <http://gcc.gnu.org/ml/gcc-patches/2003-07/msg00534.html>
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
` (4 preceding siblings ...)
2003-07-05 17:15 ` pinskia at physics dot uc dot edu
@ 2003-07-07 4:56 ` pinskia at physics dot uc dot edu
2003-07-07 8:02 ` cvs-commit at gcc dot gnu dot org
2003-07-07 10:14 ` pinskia at physics dot uc dot edu
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-07 4:56 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-07 04:56 -------
Fixed on the mainline.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
` (5 preceding siblings ...)
2003-07-07 4:56 ` pinskia at physics dot uc dot edu
@ 2003-07-07 8:02 ` cvs-commit at gcc dot gnu dot org
2003-07-07 10:14 ` pinskia at physics dot uc dot edu
7 siblings, 0 replies; 9+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2003-07-07 8:02 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2003-07-07 08:02 -------
Subject: Bug 11368
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-3_3-branch
Changes by: aj@gcc.gnu.org 2003-07-07 08:02:43
Modified files:
gcc/doc : invoke.texi
gcc : ChangeLog
Log message:
2003-07-07 Andrew Pinski <pinskia@physics.uc.edu>
PR optimization/11368
* doc/invoke.texi (-falign-functions): Document that
when n is zero then a machine-dependent default is used.
(-falign-labels): Document that when n is zero then a
machine-dependent default is used and that -falign-labels =1
is equivalent to -fno-align-labels.
(-falign-loops): Likewise.
(-falign-jumps): Likewise.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.209.2.38&r2=1.209.2.39
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.16114.2.637&r2=1.16114.2.638
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug optimization/11368] -falign-* has no effect on i386
2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
` (6 preceding siblings ...)
2003-07-07 8:02 ` cvs-commit at gcc dot gnu dot org
@ 2003-07-07 10:14 ` pinskia at physics dot uc dot edu
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-07 10:14 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11368
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-07 10:14 -------
And fixed for 3.3.1.
^ permalink raw reply [flat|nested] 9+ messages in thread
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2003-06-29 10:34 [Bug driver/11368] New: -falign-* has no effect on i386 debian-gcc at lists dot debian dot org
2003-06-29 12:41 ` [Bug optimization/11368] " pinskia at physics dot uc dot edu
2003-06-29 12:41 ` pinskia at physics dot uc dot edu
2003-07-05 15:53 ` pinskia at physics dot uc dot edu
2003-07-05 17:14 ` pinskia at physics dot uc dot edu
2003-07-05 17:15 ` pinskia at physics dot uc dot edu
2003-07-07 4:56 ` pinskia at physics dot uc dot edu
2003-07-07 8:02 ` cvs-commit at gcc dot gnu dot org
2003-07-07 10:14 ` pinskia at physics dot uc dot edu
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