[Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
--- Comment #11 from armin76 at gentoo dot org 2010-07-03 16:05 --- Ping :) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
[Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
-- rguenth at gcc dot gnu dot org changed: What|Removed |Added Priority|P3 |P2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
[Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
--- Comment #10 from siarhei dot siamashka at gmail dot com 2010-05-17 18:48 --- Maybe I'm too impatient, but is there anything that prevents this patch from getting committed to SVN? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
[Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
--- Comment #7 from ramana at gcc dot gnu dot org 2010-04-12 08:38 --- Patch submitted here. http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00401.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
[Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
--- Comment #8 from siarhei dot siamashka at gmail dot com 2010-04-12 09:34 --- (In reply to comment #7) Patch submitted here. http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00401.html Thank you. I have been testing it for two days already. It really helps (in the sense that it is apparently better to have this fix than not to have). I have bootstrapped the hard vfp system successfully and did not notice any other problems so far. Btw, miscompilation (of all the same package) also happens with -O2 optimization settings in some other place, but I did not try to investigate where exactly it fails. But I understand that it is just a workaround for the problem which happens somewhere in the upper layer? If REV instruction did not actually support conditional execution, then the fix would require actually finding the real cause. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
Re: [Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
On Mon, 2010-04-12 at 09:34 +, siarhei dot siamashka at gmail dot com wrote: --- Comment #8 from siarhei dot siamashka at gmail dot com 2010-04-12 09:34 --- (In reply to comment #7) Patch submitted here. http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00401.html Thank you. I have been testing it for two days already. It really helps (in the sense that it is apparently better to have this fix than not to have). I have bootstrapped the hard vfp system successfully and did not notice any other problems so far. Btw, miscompilation (of all the same package) also happens with -O2 optimization settings in some other place, but I did not try to investigate where exactly it fails. But I understand that it is just a workaround for the problem which happens somewhere in the upper layer? If REV instruction did not actually support conditional execution, then the fix would require actually finding the real cause. There were 2 issues, one is that REV isn't marked as being allowed conditional and the other is that the CCFSM state machine appears to go wrong in this particular case which is something I need to investigate when I have some more free time. (Note this is ARM backend specific only.) Thus the fix isn't a work-around because it introduces predicated support for something like the REV instruction which is the right thing to do here.
[Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
--- Comment #9 from ramana dot radhakrishnan at arm dot com 2010-04-12 09:51 --- Subject: Re: [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations On Mon, 2010-04-12 at 09:34 +, siarhei dot siamashka at gmail dot com wrote: --- Comment #8 from siarhei dot siamashka at gmail dot com 2010-04-12 09:34 --- (In reply to comment #7) Patch submitted here. http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00401.html Thank you. I have been testing it for two days already. It really helps (in the sense that it is apparently better to have this fix than not to have). I have bootstrapped the hard vfp system successfully and did not notice any other problems so far. Btw, miscompilation (of all the same package) also happens with -O2 optimization settings in some other place, but I did not try to investigate where exactly it fails. But I understand that it is just a workaround for the problem which happens somewhere in the upper layer? If REV instruction did not actually support conditional execution, then the fix would require actually finding the real cause. There were 2 issues, one is that REV isn't marked as being allowed conditional and the other is that the CCFSM state machine appears to go wrong in this particular case which is something I need to investigate when I have some more free time. (Note this is ARM backend specific only.) Thus the fix isn't a work-around because it introduces predicated support for something like the REV instruction which is the right thing to do here. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
[Bug target/43698] [4.5/4.6 Regression] Invalid code when building gentoo pax-utils-0.1.19 with -Os optimizations
-- rguenth at gcc dot gnu dot org changed: What|Removed |Added Summary|Invalid code when building |[4.5/4.6 Regression] Invalid |gentoo pax-utils-0.1.19 with|code when building gentoo |-Os optimizations |pax-utils-0.1.19 with -Os ||optimizations Target Milestone|--- |4.5.1 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43698
