--- Comment #6 from danglin at gcc dot gnu dot org 2009-02-04 04:24 ---
I tried the testcase with 4.4.0. The problem is not fixed. All the explicit
register variables are optimized away at -O.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32820
--- Comment #5 from steven at gcc dot gnu dot org 2007-11-26 14:10 ---
Thanks for the effort you have put into this.
Your bug is probably fixed in GCC 4.3 (for which the entire dataflow module has
been rewritten from scratch) but it probably still exists in GCC 4.2.
As you have shown,
--- Comment #1 from jbuehler at spirentcom dot com 2007-07-25 13:09 ---
This bug is also present in 4.0.1 for powerpc-ibm-aix5.2.0.0. Change the
registers in the problematic code to r14, r15, r16, r17 -- one of the registers
is not set by the optimized routine, but is by the non-optimiz
--- Comment #2 from jbuehler at spirentcom dot com 2007-07-25 13:22 ---
The same bug is present in the following versions of gcc for
sparc-sun-solaris2.9:
2.95.3
2.95
3.0.2
3.0.4
3.1.1
3.2.3
3.3.6
3.4.6
4.0.1
4.0.4
4.1.2
4.2.0
Use registers l1, l2, l3, l4 in the sample code to demonstr
--- Comment #3 from jbuehler at spirentcom dot com 2007-07-25 13:28 ---
I would appreciate a fix for this because the code being compiled is the GHC
compiler itself. I have to compile GHC for hppa without optimization because I
have been unable to find a compiler options workaround for
--- Comment #4 from jbuehler at spirentcom dot com 2007-08-09 11:38 ---
Created an attachment (id=14045)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14045&action=view)
gcc 4.0.4 global register variable optimizer patch
The attached patch fixes the optimizer bug for gcc 4.0.4 and
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32820
Siarhei Siamashka changed:
What|Removed |Added
CC||siarhei.siamashka at gmail
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32820
--- Comment #8 from Siarhei Siamashka
2010-10-25 10:17:47 UTC ---
On the second thought, this bug was about global variables. But my problem is
related to the use of local variables. So I have submitted a separate PR46164
about it.
