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* [Bug c/38157] New: -fconserve-stack enabled by default
@ 2008-11-16 14:21 edwintorok at gmail dot com
2008-11-17 22:24 ` [Bug middle-end/38157] " pinskia at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: edwintorok at gmail dot com @ 2008-11-16 14:21 UTC (permalink / raw)
To: gcc-bugs
At both O0 and O3 conserve-stack is enabled.
"The compiler will attempt to use less stack space, even if that makes the
program slower."
Doesn't that contradict with -O2 and -O3?
gcc_inst/bin/gcc -O0 -Q foo.c --help=optimizers |grep conserve-stack
-fconserve-stack [enabled]
gcc_inst/bin/gcc -O3 -Q foo.c --help=optimizers |grep conserve-stack
-fconserve-stack [enabled]
gcc_inst/bin/gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc/configure --disable-multilib --disable-static
--prefix=/home/edwin/gcc_inst/ --enable-languages=c,c++
--enable-checking=assert,df,fold,gc,misc,rtl,rtlflag,runtime,tree
Thread model: posix
gcc version 4.4.0 20081116 (experimental) [trunk revision 141912] (GCC)
--
Summary: -fconserve-stack enabled by default
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: edwintorok at gmail dot com
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38157
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/38157] -fconserve-stack enabled by default
2008-11-16 14:21 [Bug c/38157] New: -fconserve-stack enabled by default edwintorok at gmail dot com
@ 2008-11-17 22:24 ` pinskia at gcc dot gnu dot org
2008-11-17 22:29 ` hubicka at gcc dot gnu dot org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2008-11-17 22:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2008-11-17 22:23 -------
Hmm:
Common Var(flag_conserve_stack,0) Optimization
It should be:
Common Var(flag_conserve_stack) Init(0) Optimization
Confirmed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|c |middle-end
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2008-11-17 22:23:14
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38157
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/38157] -fconserve-stack enabled by default
2008-11-16 14:21 [Bug c/38157] New: -fconserve-stack enabled by default edwintorok at gmail dot com
2008-11-17 22:24 ` [Bug middle-end/38157] " pinskia at gcc dot gnu dot org
@ 2008-11-17 22:29 ` hubicka at gcc dot gnu dot org
2009-01-29 19:43 ` hjl dot tools at gmail dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: hubicka at gcc dot gnu dot org @ 2008-11-17 22:29 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from hubicka at gcc dot gnu dot org 2008-11-17 22:27 -------
Mine.
--
hubicka at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |hubicka at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2008-11-17 22:23:14 |2008-11-17 22:27:46
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38157
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/38157] -fconserve-stack enabled by default
2008-11-16 14:21 [Bug c/38157] New: -fconserve-stack enabled by default edwintorok at gmail dot com
2008-11-17 22:24 ` [Bug middle-end/38157] " pinskia at gcc dot gnu dot org
2008-11-17 22:29 ` hubicka at gcc dot gnu dot org
@ 2009-01-29 19:43 ` hjl dot tools at gmail dot com
2009-01-30 10:05 ` hariharans at picochip dot com
2009-02-04 14:37 ` bonzini at gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: hjl dot tools at gmail dot com @ 2009-01-29 19:43 UTC (permalink / raw)
To: gcc-bugs
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38157
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/38157] -fconserve-stack enabled by default
2008-11-16 14:21 [Bug c/38157] New: -fconserve-stack enabled by default edwintorok at gmail dot com
` (2 preceding siblings ...)
2009-01-29 19:43 ` hjl dot tools at gmail dot com
@ 2009-01-30 10:05 ` hariharans at picochip dot com
2009-02-04 14:37 ` bonzini at gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: hariharans at picochip dot com @ 2009-01-30 10:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from hariharans at picochip dot com 2009-01-30 10:04 -------
Index: gcc/common.opt
===================================================================
--- gcc/common.opt (revision 143749)
+++ gcc/common.opt (working copy)
@@ -386,7 +386,7 @@
Do not put uninitialized globals in the common section
fconserve-stack
-Common Var(flag_conserve_stack,0) Optimization
+Common Var(flag_conserve_stack) Optimization
Do not perform optimizations increasing noticeably stack usage
fcprop-registers
This patch was commited to mainline (for 4.4.0).
--
hariharans at picochip dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hariharans at picochip dot
| |com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38157
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/38157] -fconserve-stack enabled by default
2008-11-16 14:21 [Bug c/38157] New: -fconserve-stack enabled by default edwintorok at gmail dot com
` (3 preceding siblings ...)
2009-01-30 10:05 ` hariharans at picochip dot com
@ 2009-02-04 14:37 ` bonzini at gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: bonzini at gnu dot org @ 2009-02-04 14:37 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from bonzini at gnu dot org 2009-02-04 14:36 -------
Fixed.
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38157
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-02-04 14:37 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-11-16 14:21 [Bug c/38157] New: -fconserve-stack enabled by default edwintorok at gmail dot com
2008-11-17 22:24 ` [Bug middle-end/38157] " pinskia at gcc dot gnu dot org
2008-11-17 22:29 ` hubicka at gcc dot gnu dot org
2009-01-29 19:43 ` hjl dot tools at gmail dot com
2009-01-30 10:05 ` hariharans at picochip dot com
2009-02-04 14:37 ` bonzini at gnu dot org
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