[Bug target/48774] [4.6/4.7 Regression] gcc-4.6.0 optimization regression on x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48774
--- Comment #15 from Jakub Jelinek jakub at gcc dot gnu.org 2011-05-04
09:21:15 UTC ---
Author: jakub
Date: Wed May 4 09:21:09 2011
New Revision: 173359
URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=173359
Log:
Backported from mainline
2011-05-03 Uros Bizjak ubiz...@gmail.com
Jakub Jelinek ja...@redhat.com
PR target/48774
* config/i386/i386.c (ix86_match_ccmode): For CC{A,C,O,S}mode
only succeed if req_mode is the same as set_mode.
* gcc.dg/pr48774.c: New test.
Added:
branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/pr48774.c
Modified:
branches/gcc-4_4-branch/gcc/ChangeLog
branches/gcc-4_4-branch/gcc/config/i386/i386.c
branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
[Bug target/48774] [4.6/4.7 Regression] gcc-4.6.0 optimization regression on x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48774
--- Comment #11 from Jakub Jelinek jakub at gcc dot gnu.org 2011-05-03
13:01:17 UTC ---
Author: jakub
Date: Tue May 3 13:01:12 2011
New Revision: 173301
URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=173301
Log:
PR target/48774
* config/i386/i386.c (ix86_match_ccmode): For CC{A,C,O,S}mode
only succeed if req_mode is the same as set_mode.
* gcc.dg/pr48774.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr48774.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
[Bug target/48774] [4.6/4.7 Regression] gcc-4.6.0 optimization regression on x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48774 Jakub Jelinek jakub at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution||FIXED --- Comment #13 from Jakub Jelinek jakub at gcc dot gnu.org 2011-05-03 13:07:20 UTC --- Fixed.
[Bug target/48774] [4.6/4.7 Regression] gcc-4.6.0 optimization regression on x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48774
--- Comment #12 from Jakub Jelinek jakub at gcc dot gnu.org 2011-05-03
13:06:14 UTC ---
Author: jakub
Date: Tue May 3 13:06:06 2011
New Revision: 173302
URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=173302
Log:
PR target/48774
* config/i386/i386.c (ix86_match_ccmode): For CC{A,C,O,S}mode
only succeed if req_mode is the same as set_mode.
* gcc.dg/pr48774.c: New test.
Added:
branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/pr48774.c
Modified:
branches/gcc-4_6-branch/gcc/ChangeLog
branches/gcc-4_6-branch/gcc/config/i386/i386.c
branches/gcc-4_6-branch/gcc/testsuite/ChangeLog
[Bug target/48774] [4.6/4.7 Regression] gcc-4.6.0 optimization regression on x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48774
--- Comment #14 from Jakub Jelinek jakub at gcc dot gnu.org 2011-05-03
16:38:34 UTC ---
Author: jakub
Date: Tue May 3 16:38:25 2011
New Revision: 173329
URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=173329
Log:
PR target/48774
* config/i386/i386.c (ix86_match_ccmode): For CC{A,C,O,S}mode
only succeed if req_mode is the same as set_mode.
* gcc.dg/pr48774.c: New test.
Added:
branches/gcc-4_5-branch/gcc/testsuite/gcc.dg/pr48774.c
Modified:
branches/gcc-4_5-branch/gcc/ChangeLog
branches/gcc-4_5-branch/gcc/config/i386/i386.c
branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
[Bug target/48774] [4.6/4.7 Regression] gcc-4.6.0 optimization regression on x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48774 --- Comment #10 from Jakub Jelinek jakub at gcc dot gnu.org 2011-05-02 17:31:17 UTC --- Created attachment 24169 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=24169 gcc47-pr48774.patch Untested fix. The additional condition could be changed to just CCCmode check, or on the other side have: || !(TARGET_USE_BT || optimize_function_for_size_p (cfun)) in as well. Or *btmode would need to be represented in RTL in some different way, where the setting of Carry is natural to the operation and couldn't be confused with testqi.
