* [Bug target/41849] optimization fails when register variables are used for an interrupt
[not found] <bug-41849-4@http.gcc.gnu.org/bugzilla/>
@ 2011-04-20 19:46 ` gjl at gcc dot gnu.org
2011-07-25 15:19 ` gjl at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: gjl at gcc dot gnu.org @ 2011-04-20 19:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41849
Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gjl at gcc dot gnu.org,
| |hendrixgr at gmail dot com
Component|rtl-optimization |target
Known to work| |4.5.0
--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-04-20 19:45:54 UTC ---
Unfortunately, we don't see the exact command line.
I don't see this for 4.5.0, tried -O, -O2, -Os, -O3. All gives
foo:
/* prologue: function */
/* frame size = 0 */
/* stack size = 0 */
.L__stack_usage = 0
sts timer0_h8_buf,r3
/* epilogue start */
ret
Note that volatile on register variables does not work as expected. volatile is
meaningful for memory locations only.
As the addresses in your snipp indicate there is much more code in the module,
so presumably we don't see the proper source.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug target/41849] optimization fails when register variables are used for an interrupt
[not found] <bug-41849-4@http.gcc.gnu.org/bugzilla/>
2011-04-20 19:46 ` [Bug target/41849] optimization fails when register variables are used for an interrupt gjl at gcc dot gnu.org
@ 2011-07-25 15:19 ` gjl at gcc dot gnu.org
2011-07-25 15:22 ` gjl at gcc dot gnu.org
2011-07-25 15:26 ` gjl at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: gjl at gcc dot gnu.org @ 2011-07-25 15:19 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41849
--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-25 15:19:28 UTC ---
Created attachment 24828
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24828
C test case
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug target/41849] optimization fails when register variables are used for an interrupt
[not found] <bug-41849-4@http.gcc.gnu.org/bugzilla/>
2011-04-20 19:46 ` [Bug target/41849] optimization fails when register variables are used for an interrupt gjl at gcc dot gnu.org
2011-07-25 15:19 ` gjl at gcc dot gnu.org
@ 2011-07-25 15:22 ` gjl at gcc dot gnu.org
2011-07-25 15:26 ` gjl at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: gjl at gcc dot gnu.org @ 2011-07-25 15:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41849
--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-25 15:21:54 UTC ---
Created attachment 24829
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24829
Test case from attachment 24828 as compiled with avr-gcc 4.4.2
For compiler options, see the attachment: -Os -mmcu=atmega8.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug target/41849] optimization fails when register variables are used for an interrupt
[not found] <bug-41849-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2011-07-25 15:22 ` gjl at gcc dot gnu.org
@ 2011-07-25 15:26 ` gjl at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: gjl at gcc dot gnu.org @ 2011-07-25 15:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41849
Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |4.4.2
Resolution| |WORKSFORME
--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-25 15:26:02 UTC ---
Closed as WORKSFORME. avr-gcc 4.4.2 compiles the test case correctly.
^ permalink raw reply [flat|nested] 4+ messages in thread