--- Comment #5 from Kyle dot D dot Moffett at boeing dot com 2010-08-31
14:03 ---
Created an attachment (id=21605)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21605action=view)
Further stripped testcase with problematic section identified
Ok, I've spent a bit more time fiddling
--- Comment #6 from Kyle dot D dot Moffett at boeing dot com 2010-08-31
14:04 ---
Created an attachment (id=21606)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21606action=view)
Makefile for test.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44606
--- Comment #4 from Kyle dot D dot Moffett at boeing dot com 2010-07-16
18:48 ---
(In reply to comment #0)
I attached two testcase which is stripped down graphicsmagick code.
tc-resize2.c has a few instructions more than tc-resize.c. I belive the bug
is
the same.
I was able
--- Comment #47 from Kyle dot D dot Moffett at boeing dot com 2010-06-21
15:55 ---
(In reply to comment #41)
Created an attachment (id=20877)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20877action=view) [edit]
e500.h and caller-save.c patch
The ICE in #38 is due to a bug
--- Comment #33 from Kyle dot D dot Moffett at boeing dot com 2010-06-08
06:48 ---
EGLIBC and PPL are still building; I'm heading to sleep and I'll check on them
later this morning.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #35 from Kyle dot D dot Moffett at boeing dot com 2010-06-08
15:23 ---
Hrm, well PPL still seems to be failing the interval1 test, but I'm not sure
that one's related as the part that fails is test01float. More info to
come shortly.
--
http://gcc.gnu.org/bugzilla
--- Comment #36 from Kyle dot D dot Moffett at boeing dot com 2010-06-08
20:34 ---
Ok, I'm pretty sure this is unrelated to this bug, but I still get one
test-failure with PPL 0.10.2. The interval1 test fails due to the
test01float subtest, apparently due to very slightly excessive
--- Comment #27 from Kyle dot D dot Moffett at boeing dot com 2010-06-07
12:49 ---
(In reply to comment #25)
Yes it seems the patch is not sufficient on 4.4. On mainline the code looks
good by inspection. (I don't have e500 hardware to run tests on.)
If you'd like login access
--- Comment #29 from Kyle dot D dot Moffett at boeing dot com 2010-06-07
18:28 ---
Awesome!!! Both of our testcases that were failing pass with this patch
applied!
I'm not going to call it a 100% victory yet, I want to rebuild our native
compilers and build-and-run the PostgreSQL, GMP
--- Comment #30 from Kyle dot D dot Moffett at boeing dot com 2010-06-07
18:56 ---
Ok, the cross-compiler built with this patch fails to build a native GCC for
the target with the following ICE:
../../../src/libgcc/../libdecnumber/decLibrary.c: In function 'isinfd128':
../../../src
--- Comment #31 from Kyle dot D dot Moffett at boeing dot com 2010-06-08
04:24 ---
Alan,
Now that I've corrected all of my compiler issues, your first patch (the one
quoted below) works like a charm. I still need to do the extensive
archive-rebuild and testsuite run to verify
--- Comment #32 from Kyle dot D dot Moffett at boeing dot com 2010-06-08
05:07 ---
The first working patch (VOIDmode||DFmode) just successfully passed full GMP
and MPFR testsuites on the e500 boards. PPL and EGLIBC are currently
rebuilding.
--
http://gcc.gnu.org/bugzilla
--- Comment #21 from Kyle dot D dot Moffett at boeing dot com 2010-06-06
15:37 ---
I was trying to strip down the testcase and try to see which optimization flags
caused it. I started from -O2 and tried to see which -O2 flags (in addition to
O1) were needed to cause the problem. From
--- Comment #23 from Kyle dot D dot Moffett at boeing dot com 2010-06-07
05:36 ---
(In reply to comment #22)
Adding the following to config/rs6000/e500.h will likely fix the bug.
Testing..
Oh, very nice! Thanks for the speedy assistance on this! I've got my own test
compiler
--- Comment #24 from Kyle dot D dot Moffett at boeing dot com 2010-06-07
05:44 ---
Hmm, unfortunately in my preliminary testing this does not seem to fix either
testcase.
Cheers,
Kyle Moffett
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #17 from Kyle dot D dot Moffett at boeing dot com 2010-06-04
17:24 ---
Created an attachment (id=20840)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20840action=view)
Minimal test with -O1
I've managed to shrink this down to a 44-line testcase that fails
--- Comment #18 from Kyle dot D dot Moffett at boeing dot com 2010-06-04
17:24 ---
Created an attachment (id=20841)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20841action=view)
Minimal test objdump with -O1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #3 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
19:26 ---
(In reply to comment #0)
So after looking at the code I saw now the following:
1c24 __floatdidf:
1c6c: 11 23 1a 2c evmergehi r9,r3,r3
This function is touching the complete 64bit
--- Comment #4 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
20:09 ---
Ok, I have a trivial 19-line testcase that triggers the bug on my native Debian
GCC 4.4.4-2+powerpcspe1 (with PR44169 fix) with -O0 and -O3. The compiler was
built with: --with-cpu=8548 --enable
--- Comment #6 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
20:21 ---
Created an attachment (id=20823)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20823action=view)
Combined trivial testcase (For -O0)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #7 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
20:22 ---
Created an attachment (id=20824)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20824action=view)
Multipart trivial testcase (For -O3)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #8 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
20:22 ---
Created an attachment (id=20825)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20825action=view)
Multipart trivial testcase (For -O3) part 2
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #9 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
20:22 ---
Created an attachment (id=20826)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20826action=view)
Multipart trivial testcase (For -O3) part 3
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #10 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
20:26 ---
Created an attachment (id=20827)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20827action=view)
Multipart trivial testcase objdump result (Built with -O0)
--
http://gcc.gnu.org/bugzilla
--- Comment #11 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
20:26 ---
Created an attachment (id=20828)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20828action=view)
Multipart trivial testcase objdump result (Built with -O3)
--
http://gcc.gnu.org/bugzilla
--- Comment #12 from Kyle dot D dot Moffett at boeing dot com 2010-06-03
23:18 ---
(From update of attachment 20823)
Scratch my test cases... register asm(...) doesn't work the way I thought it
did... Sebastian's test case is the only one that I've found that works.
--
Kyle dot D
--- Comment #13 from Kyle dot D dot Moffett at boeing dot com 2010-06-04
01:37 ---
Created an attachment (id=20829)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20829action=view)
Updated tc-lossings-floats.c
I sat down with GCC and vim for a couple hours narrowing down
--- Comment #14 from Kyle dot D dot Moffett at boeing dot com 2010-06-04
01:37 ---
Created an attachment (id=20830)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20830action=view)
Updated tc-lossings-floats.objdump
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44364
--- Comment #15 from Kyle dot D dot Moffett at boeing dot com 2010-06-04
02:17 ---
Created an attachment (id=20831)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20831action=view)
Even tinier tc-lossings-floats.c
Spent a bit more time on the testcase and made it even smaller
--- Comment #16 from Kyle dot D dot Moffett at boeing dot com 2010-06-04
02:17 ---
Created an attachment (id=20832)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20832action=view)
Even tinier tc-lossings-floats.objdump
--
Kyle dot D dot Moffett at boeing dot com changed
--- Comment #7 from Kyle dot D dot Moffett at boeing dot com 2010-05-20
12:17 ---
Created an attachment (id=20707)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20707action=view)
Assembled tc.c output from Debian-built powerpc-linux-gnuspe-gcc 4.3.4
--
http://gcc.gnu.org
--- Comment #8 from Kyle dot D dot Moffett at boeing dot com 2010-05-20
12:19 ---
Created an attachment (id=20708)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20708action=view)
Assembled tc.c output from Debian-built powerpc-linux-gnuspe-gcc 4.4.4
--
http://gcc.gnu.org
--- Comment #9 from Kyle dot D dot Moffett at boeing dot com 2010-05-20
12:29 ---
Created an attachment (id=20710)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20710action=view)
Assembled tc.c output from Debian-built powerpc-linux-gnuspe-gcc 4.4.2
--
http://gcc.gnu.org
--- Comment #10 from Kyle dot D dot Moffett at boeing dot com 2010-05-20
12:37 ---
Ok, it looks like the bug was introduced in the 4.4 branch between 4.4.2 and
4.4.4, because my old GCC 4.4.2 compiler works, but the 4.4.4 I built yesterday
after I noticed this report does
--- Comment #5 from Kyle dot D dot Moffett at boeing dot com 2010-05-20
04:53 ---
I am not able to reproduce this with a cross-compiling GCC 4.4.3 or 4.4.4 built
from Debian sources. Configuration parameters for GCC 4.4.4 were:
-v
--with-pkgversion='Debian 4.4.4-2'
--with-bugurl
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