--- Comment #26 from steven at gcc dot gnu dot org 2007-11-19 09:03 ---
If there is a latent bug, it will show up somewhen and get its own nice bug
report.
--
steven at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #21 from bonzini at gnu dot org 2007-11-14 11:04 ---
I am not following you. Why do both executions abort? We don't want to find
two different wrong-code bugs, but to compare one correct and one wrong
execution. Also, it would be okay to have no output as long as we can
--- Comment #22 from dominiq at lps dot ens dot fr 2007-11-14 12:05 ---
Does the bug show up if you do something like this?
Yes, indeed! Otherwise I would not have noticed the bug (one pitfall of the
testsuite is that you know that a test has failed, but you don't kseldom know
why). I
--- Comment #23 from bonzini at gnu dot org 2007-11-14 12:12 ---
Created an attachment (id=14553)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14553action=view)
patch to test
I had this alternative patch to fix the addr-sel-1.c failure on
i686-pc-linux-gnu. Could you check if it
--- Comment #24 from dominiq at lps dot ens dot fr 2007-11-14 12:50 ---
I had this alternative patch to fix the addr-sel-1.c failure on
i686-pc-linux-gnu. Could you check if it fixes this bug too?
Yes, it does. Thanks a lot for the quick fix.
--
--- Comment #25 from paolo dot bonzini at lu dot unisi dot ch 2007-11-14
13:24 ---
Subject: Re: [4.3 regression] gfortran.dg/char_cshift_2.f90
fails with -O3 -funroll-loops fails on Intel Darwin
Yes, it does. Thanks a lot for the quick fix.
Note that even if the patch is
--- Comment #7 from dominiq at lps dot ens dot fr 2007-11-13 08:01 ---
Created an attachment (id=14539)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14539action=view)
Good assembly code.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34067
--- Comment #9 from dominiq at lps dot ens dot fr 2007-11-13 08:10 ---
and the from the debugger which field of the array caused the abort and maybe
even good
and bad char_cshift_2.*.fwprop* dumps? Can you hit breakpoint on
_gfortran_cshift1_4_char
and _gfortran_cshift1_8_char
--- Comment #8 from dominiq at lps dot ens dot fr 2007-11-13 08:02 ---
Created an attachment (id=14540)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14540action=view)
Bad assembly code.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34067
--- Comment #10 from bonzini at gnu dot org 2007-11-13 08:16 ---
Anyway, it looks like a latent bug somewhere else.
--
bonzini at gnu dot org changed:
What|Removed |Added
--- Comment #11 from bonzini at gnu dot org 2007-11-13 08:21 ---
Since you are at it, could you test on *exactly* the involved revisions, i.e.
130042 and 130043?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34067
--- Comment #12 from dominiq at lps dot ens dot fr 2007-11-13 08:42 ---
Subject: Re: [4.3 regression] gfortran.dg/char_cshift_2.f90 fails with -O3
-funroll-loops fails on Intel Darwin
Since you are at it, could you test on *exactly* the involved revisions, i.e.
130042 and 130043?
--- Comment #13 from dominiq at lps dot ens dot fr 2007-11-13 10:40 ---
Created an attachment (id=14542)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14542action=view)
Comparison between revisions 130042 and 130043 with -O2 -funroll-loops and with
-O1+all the others
bzip2 tar
--- Comment #14 from dominiq at lps dot ens dot fr 2007-11-13 10:41 ---
Could you try to compile the assembly code in r43_O2 and see if you get the
abort?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34067
--- Comment #15 from paolo dot bonzini at lu dot unisi dot ch 2007-11-13
11:43 ---
Subject: Re: [4.3 regression] gfortran.dg/char_cshift_2.f90
fails with -O3 -funroll-loops fails on Intel Darwin
bzip2 tar archive with four directories r42_O1, r42_O2, r43_O1, and r43_O2
containing
--- Comment #16 from dominiq at lps dot ens dot fr 2007-11-13 13:18 ---
Also, please check if the bug appears disappears with
-O2 -fno-forward-propagate -funroll-loops
It disappears with -fno-forward-propagate (rev 130043).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34067
--- Comment #17 from dominiq at lps dot ens dot fr 2007-11-13 13:46 ---
Created an attachment (id=14543)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14543action=view)
outputs with -fdump-rtl-all
outputs with -fdump-rtl-all with -O2 -funroll-loops for revisions 130042 and
130043.
--- Comment #18 from dominiq at lps dot ens dot fr 2007-11-13 15:58 ---
At revision 130137 the minimal flags are:
[ibook-dhum] f90/bug% gfc -O1 -funroll-loops -fschedule-insns -fregmove
-fexpensive-optimizations -fforward-propagate
char_cshift_2_red_1.f90[ibook-dhum] f90/bug% a.out
--- Comment #19 from paolo dot bonzini at lu dot unisi dot ch 2007-11-13
16:46 ---
Subject: Re: [4.3 regression] gfortran.dg/char_cshift_2.f90
fails with -O3 -funroll-loops fails on Intel Darwin
[ibook-dhum] f90/bug% gfc -O1 -funroll-loops -fschedule-insns -fregmove
--- Comment #20 from dominiq at lps dot ens dot fr 2007-11-13 16:59 ---
Created an attachment (id=14544)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14544action=view)
outputs of -fdump-rtl-all for two set of options at -O1
The folder r137_O1_insns corresponds to
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
CC||pinskia at gcc dot gnu dot
|
--- Comment #6 from jakub at gcc dot gnu dot org 2007-11-13 07:35 ---
I certainly can't reproduce this on x86_64-linux (with neither -m32 nor -m64).
Can you please attach the good and bad char_cshift_2.s, and the from the
debugger
which field of the array caused the abort and maybe even
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