[Bug bootstrap/42347] New: sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[Bug bootstrap/42347] New: sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[dougmencken at gmail dot com]

Bootstrap of gcc-4.5-2009120 resulted in an error:
http://pastebin.com/m3047a96f

Current GCC:

Target: powerpc-pc-linux-uclibc
Configured with: ./configure --build=powerpc-pc-linux-uclibc
--host=powerpc-pc-linux-uclibc --target=powerpc-pc-linux-uclibc --disable-nls
--with-system-zlib --disable-checking --disable-werror --disable-multilib
--disable-libssp --enable-languages=c,c++ --enable-shared
--enable-threads=posix --disable-__cxa_atexit
Thread model: posix
gcc version 4.4.2 (GCC) 

gcc-4.5-20091203 was configured the same way:

./configure --build=powerpc-pc-linux-uclibc --host=powerpc-pc-linux-uclibc
--target=powerpc-pc-linux-uclibc --disable-nls --with-system-zlib
--disable-checking --disable-werror --disable-multilib --disable-libssp
--enable-languages=c,c++ --enable-shared --enable-threads=posix
--disable-__cxa_atexit

then just 'make'


-- 
           Summary: sched-deps.c:3840:1: internal compiler error: in
                    fixup_reorder_chain, at cfglayout.c:796
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dougmencken at gmail dot com
 GCC build triplet: powerpc-gnu-linux-uclibc
  GCC host triplet: powerpc-gnu-linux-uclibc
GCC target triplet: powerpc-gnu-linux-uclibc


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[dougmencken at gmail dot com]

------- Comment #1 from dougmencken at gmail dot com  2009-12-10 10:55 -------
Created an attachment (id=19274)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19274&action=view)
sched-deps.i, generated by adding -save-temps


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2009-12-10 12:09 -------
As the host compiler is a same configured 4.4 this looks like a regression.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
            Summary|sched-deps.c:3840:1:        |[4.5 Regression] sched-
                   |internal compiler error: in |deps.c:3840:1: internal
                   |fixup_reorder_chain, at     |compiler error: in
                   |cfglayout.c:796             |fixup_reorder_chain, at
                   |                            |cfglayout.c:796
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[dougmencken at gmail dot com]

------- Comment #3 from dougmencken at gmail dot com  2010-01-23 11:53 -------
May I add that GCC 4.4.3 bootstraps perfectly with the same config without any
single issue.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[steven at gcc dot gnu dot org]

------- Comment #4 from steven at gcc dot gnu dot org  2010-01-23 12:06 -------
Don't use pastebin please. It's impossible to see what you dumped there.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

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------- Comment #5 from siarhei dot siamashka at gmail dot com  2010-04-03 17:39 -------
Got exactly the same ICE on ARM, bootstrapping gcc:

/var/tmp/portage/sys-devel/gcc-4.5.0_alpha20100401/work/gcc-4.5-20100401/gcc/sched-deps.c:
In function ‘get_dep_weak_1’:
/var/tmp/portage/sys-devel/gcc-4.5.0_alpha20100401/work/gcc-4.5-20100401/gcc/sched-deps.c:3841:1:
internal compiler error: in fixup_reorder_chain, at cfglayout.c:796
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.gentoo.org/> for instructions.

But preprocessed source feeded to gcc-4.5-20100401 crosscompiler does not
result in ICE. I'm going to try bootstrapping again with the patch from PR42509
and report back.


-- 

siarhei dot siamashka at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |siarhei dot siamashka at
                   |                            |gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #6 from siarhei dot siamashka at gmail dot com  2010-04-03 21:53 -------
(In reply to comment #5)
> But preprocessed source feeded to gcc-4.5-20100401 crosscompiler does not
> result in ICE. I'm going to try bootstrapping again with the patch from PR42509
> and report back.

This patch alone did not help. Will try to bootstrap SVN head now and do a few
more tests. It can take many hours because native compilation on ARM is
relatively slow.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #7 from siarhei dot siamashka at gmail dot com  2010-04-06 11:01 -------
Long story short. This bootstrap failure seems to be related to
--disable-checking configure option. Reproduced on powerpc-unknown-linux-gnu
and armv7l-unknown-linux-gnueabi. I'm re-running the tests now to be completely
sure.

Maybe it is caused by some bad assert with a side effect?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[steven at gcc dot gnu dot org]

------- Comment #8 from steven at gcc dot gnu dot org  2010-04-06 11:07 -------
It would be really helpful if someone can explain how to reproduce this with a
cross-compiler. I will analyze/fix this problem when this is reproducible with
a cross.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2010-04-06 11:20 -------
GCC 4.5.0 is being released.  Deferring to 4.5.1.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.5.0                       |4.5.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #10 from siarhei dot siamashka at gmail dot com  2010-04-06 14:44 -------
(In reply to comment #8)
> It would be really helpful if someone can explain how to reproduce this with a
> cross-compiler. I will analyze/fix this problem when this is reproducible with
> a cross.

I'm afraid this is not (easily) reproducible with a cross-compiler.

Now I double checked everything and "--disable-checking" option really does
break bootstrap on ppc and arm. Replacing it with "--enable-checking=assert"
results in a successful build. It's also interesting that this bug does not
affect x86 or x86-64.

I think a simple script can be used for bisecting and may help to find a
problematic "gcc_assert" (if it's really a problem). But this all will probably
take at least a few days to run till completion, neither arm nor ppc hardware
that I have is particularly fast...

Avoiding the use of "--disable-checking" option can be used as a workaround for
now.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[dougmencken at gmail dot com]

------- Comment #11 from dougmencken at gmail dot com  2010-04-27 17:07 -------
GCC 4.5.0 bootstraps without --disable-checking (Configured with: ./configure
--prefix=/usr --sysconfdir=/etc
--mandir=/usr/share/man --build=powerpc-gnu-linux-uclibc
--host=powerpc-gnu-linux-uclibc --target=powerpc-gnu-linux-uclibc
--with-system-zlib --enable-languages=c,c++,fortran --disable-nls
--disable-werror --disable-multilib --disable-libssp --enable-checking=assert
--enable-shared --enable-threads=posix --disable-__cxa_atexit
), with that, it fails again. Also, both "retail" (not-svn) 4.4.3, which
bootstraps with --disable-checking, and "retail" 4.5.0, which doesn't, do
actually have an another huge problem:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43911 (I don't know are they
related to each other, just want you to know about that g++ problem).

I can't say how to reproduce this sched-deps bug in cross-toolchain (which
cross toolchain exactly? or is it x86 host "by default"?), but I can try to
bootstrap cross 4.5.0 as host-ppc build-ppc target-x86, if you will request it.
I can also assist in "bisecting" to find bad commit for sched-deps bug (one
bootstrap of native toolch on my hardware takes 10-12 hours).


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[dougmencken at gmail dot com]

------- Comment #12 from dougmencken at gmail dot com  2010-04-27 19:13 -------
$ cat /usr/lib/libgcc_s.so
/* GNU ld script
   Use the shared library, but some functions are only in
   the static library.  */
GROUP ( libgcc_s.so.1 libgcc.a )

$ readelf -s /usr/lib/libgcc_s.so.1 | grep Unwind
     3: 00010a80   580 FUNC    GLOBAL DEFAULT    9 _Unwind_Find_FDE@@GCC_3.0
    11: 0000bd78     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetIP@@GCC_3.0
    19: 0000e84c   496 FUNC    GLOBAL DEFAULT    9
_Unwind_Resume_or_Rethrow@@GCC_3.3
    26: 0000bda4     8 FUNC    GLOBAL DEFAULT    9
_Unwind_GetRegionStart@@GCC_3.0
    27: 0000ea74   456 FUNC    GLOBAL DEFAULT    9 _Unwind_Backtrace@@GCC_3.3
    30: 0000bccc     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetCFA@@GCC_3.3
    68: 0000e654   504 FUNC    GLOBAL DEFAULT    9 _Unwind_Resume@@GCC_3.0
    69: 0000ea3c    56 FUNC    GLOBAL DEFAULT    9
_Unwind_DeleteException@@GCC_3.0
    89: 0000e1e0   648 FUNC    GLOBAL DEFAULT    9
_Unwind_RaiseException@@GCC_3.0
    94: 0000bd94     8 FUNC    GLOBAL DEFAULT    9 _Unwind_SetIP@@GCC_3.0
   116: 0000bdec     8 FUNC    GLOBAL DEFAULT    9
_Unwind_GetTextRelBase@@GCC_3.0
   118: 0000bdac    56 FUNC    GLOBAL DEFAULT    9
_Unwind_FindEnclosingFunc@@GCC_3.3
   119: 0000bd9c     8 FUNC    GLOBAL DEFAULT    9
_Unwind_GetLanguageSpecif@@GCC_3.0
   122: 0000e468   492 FUNC    GLOBAL DEFAULT    9
_Unwind_ForcedUnwind@@GCC_3.0
   126: 0000bcd8   160 FUNC    GLOBAL DEFAULT    9 _Unwind_SetGR@@GCC_3.0
   132: 0000bc44   136 FUNC    GLOBAL DEFAULT    9 _Unwind_GetGR@@GCC_3.0
   136: 0000bde4     8 FUNC    GLOBAL DEFAULT    9
_Unwind_GetDataRelBase@@GCC_3.0
   159: 0000b6a4     4 FUNC    LOCAL  DEFAULT    9 _Unwind_DebugHook
   169: 0000debc   276 FUNC    LOCAL  DEFAULT    9 _Unwind_ForcedUnwind_Phas
   170: 0000dfd0   244 FUNC    LOCAL  DEFAULT    9 _Unwind_RaiseException_Ph
   189: 000100e8  1308 FUNC    LOCAL  DEFAULT    9 _Unwind_IteratePhdrCallba
   212: 0000bd80    20 FUNC    LOCAL  DEFAULT    9 _Unwind_GetIPInfo
   242: 00010a80   580 FUNC    GLOBAL DEFAULT    9 _Unwind_Find_FDE
   250: 0000bd78     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetIP
   258: 0000e84c   496 FUNC    GLOBAL DEFAULT    9 _Unwind_Resume_or_Rethrow
   265: 0000bda4     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetRegionStart
   266: 0000ea74   456 FUNC    GLOBAL DEFAULT    9 _Unwind_Backtrace
   269: 0000bccc     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetCFA
   307: 0000e654   504 FUNC    GLOBAL DEFAULT    9 _Unwind_Resume
   308: 0000ea3c    56 FUNC    GLOBAL DEFAULT    9 _Unwind_DeleteException
   328: 0000e1e0   648 FUNC    GLOBAL DEFAULT    9 _Unwind_RaiseException
   333: 0000bd94     8 FUNC    GLOBAL DEFAULT    9 _Unwind_SetIP
   355: 0000bdec     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetTextRelBase
   357: 0000bdac    56 FUNC    GLOBAL DEFAULT    9 _Unwind_FindEnclosingFunc
   358: 0000bd9c     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetLanguageSpecif
   361: 0000e468   492 FUNC    GLOBAL DEFAULT    9 _Unwind_ForcedUnwind
   365: 0000bcd8   160 FUNC    GLOBAL DEFAULT    9 _Unwind_SetGR
   371: 0000bc44   136 FUNC    GLOBAL DEFAULT    9 _Unwind_GetGR
   375: 0000bde4     8 FUNC    GLOBAL DEFAULT    9 _Unwind_GetDataRelBase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[rguenth at gcc dot gnu dot org]

------- Comment #13 from rguenth at gcc dot gnu dot org  2010-04-28 09:16 -------
May be related to PR43740 which also sees cc1 miscompilation but even with
release checking.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[armin76 at gentoo dot org]

------- Comment #14 from armin76 at gentoo dot org  2010-04-29 19:36 -------
I tried to bisect it, however there is an issue:

gcc failed to build since
http://repo.or.cz/w/official-gcc.git/commit/598767c938d0d001bbbe41e0a189104bb53e3580

Gives this error:
/root/build/./prev-gcc/xgcc -B/root/build/./prev-gcc/
-B/usr/powerpc64-unknown-linux-gnu/bin/ -B/usr/powerpc64-unknown-linux-gnu/bin/
-B/usr/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/powerpc64-unknown-linux-gnu/include -isystem
/usr/powerpc64-unknown-linux-gnu/sys-include    -c  -m64 -O2 -pipe -gtoggle
-DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -Wold-style-definition
-Wc++-compat   -DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/.
-I../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include 
-I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/dpd
-I../libdecnumber    ../../gcc/gcc/lambda-code.c -o lambda-code.o
../../gcc/gcc/lambda-code.c: In function 'lambda_compute_access_matrices':
../../gcc/gcc/lambda-code.c:2844:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [lambda-code.o] Error 1

That error was fixed with
http://repo.or.cz/w/official-gcc.git/commit/9dbb96fec5e08762f97dda771522283f1fe9710f

However we now got that error of what this bug is about.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

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------- Comment #15 from siarhei dot siamashka at gmail dot com  2010-05-03 23:45 -------
As found by Raúl, indeed this regression was introduced in r150091. Reverting
this change in gcc 4.5.0 release resolves the problem.

Apparently the use of __builtin_unreachable() in gcc_assert macro (activated by
!ENABLE_ASSERT_CHECKING) is triggering some kind of wrong-code bug on non
x86/x86-64 platforms (at least arm and powerpc) and causes this bootstrap
failure.

There are some other __builtin_unreachable bugs in gcc bugzilla which are
possibly related.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #16 from siarhei dot siamashka at gmail dot com  2010-05-04 07:04 -------
So basically what we have is that gcc miscompiles itself somewhere in the code
where one of those ~7000 gcc_assert is used. The next step is to identify which
one of them triggers this bad behaviour (bisecting not in the svn revisions,
but in gcc source files by flipping the use of __builtin_unreachable-based vs.
ordinary gcc_assert implementations) and extract a reduced testcase showing
__builtin_unreachable failure.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[dougmencken at gmail dot com]

------- Comment #17 from dougmencken at gmail dot com  2010-05-09 14:56 -------
../.././gcc -I../.././gcc/. -I../.././gcc/../include
-I../.././gcc/../libcpp/include  -I../.././gcc/../libdecnumber
-I../.././gcc/../libdecnumber/dpd -I../libdecnumber     ../.././gcc/rtlhooks.c
-o rtlhooks.o
/root/build-farm/gcc-4.5.0.srcpkg/host-powerpc-gnu-linux-uclibc/prev-gcc/xgcc
-B/root/build-farm/gcc-4.5.0.srcpkg/host-powerpc-gnu-linux-uclibc/prev-gcc/
-B/usr/powerpc-gnu-linux-uclibc/bin/ -B/usr/powerpc-gnu-linux-uclibc/bin/
-B/usr/powerpc-gnu-linux-uclibc/lib/ -isystem
/usr/powerpc-gnu-linux-uclibc/include -isystem
/usr/powerpc-gnu-linux-uclibc/sys-include    -c  -g -O2 -gtoggle -DIN_GCC   -W
-Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -Wold-style-definition -Wc++-compat   -DHAVE_CONFIG_H
-I. -I. -I../.././gcc -I../.././gcc/. -I../.././gcc/../include
-I../.././gcc/../libcpp/include  -I../.././gcc/../libdecnumber
-I../.././gcc/../libdecnumber/dpd -I../libdecnumber     ../.././gcc/sbitmap.c
-o sbitmap.o
/root/build-farm/gcc-4.5.0.srcpkg/host-powerpc-gnu-linux-uclibc/prev-gcc/xgcc
-B/root/build-farm/gcc-4.5.0.srcpkg/host-powerpc-gnu-linux-uclibc/prev-gcc/
-B/usr/powerpc-gnu-linux-uclibc/bin/ -B/usr/powerpc-gnu-linux-uclibc/bin/
-B/usr/powerpc-gnu-linux-uclibc/lib/ -isystem
/usr/powerpc-gnu-linux-uclibc/include -isystem
/usr/powerpc-gnu-linux-uclibc/sys-include    -c  -g -O2 -gtoggle -DIN_GCC   -W
-Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -Wold-style-definition -Wc++-compat   -DHAVE_CONFIG_H
-I. -I. -I../.././gcc -I../.././gcc/. -I../.././gcc/../include
-I../.././gcc/../libcpp/include  -I../.././gcc/../libdecnumber
-I../.././gcc/../libdecnumber/dpd -I../libdecnumber    
../.././gcc/sched-deps.c -o sched-deps.o
../.././gcc/sched-deps.c: In function 'get_dep_weak_1':
../.././gcc/sched-deps.c:3841:1: internal compiler error: in
fixup_reorder_chain, at cfglayout.c:796
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [sched-deps.o] Error 1
make[3]: Leaving directory
`/root/build-farm/gcc-4.5.0.srcpkg/host-powerpc-gnu-linux-uclibc/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `/root/build-farm/gcc-4.5.0.srcpkg'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/root/build-farm/gcc-4.5.0.srcpkg'
make: *** [all] Error 2
Command exited with non-zero status 2
real    7h 47m 02s
user    5h 39m 43s
sys     13m 48.43s
----
Tried to bootstrap GCC 4.5.0. Again.
"How TO REPRODUCE IT WITH CROSS COMPILER"? No way. Just try to build it native.
And not on x86 (i386, i486, i586, i586mmx, i686, ........, x86_64,
x86_64_4cores, ......). AGAIN: NOT ON intel compatible x86 or 100% compatible
amd or intel compatible.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #18 from siarhei dot siamashka at gmail dot com  2010-05-17 07:53 -------
Created an attachment (id=20676)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20676&action=view)
powerpc64-broken-unreachable.i

With the attached file (and '-O2 -c' options):
1. powerpc64 crosscompiler running on x86 box - always works fine
2. powerpc64 crosscompiler built with gcc 4.3.4 and running on powerpc64 box -
works fine
3. powerpc64 crosscompiler built with gcc 4.5.0 and running on powerpc64 box -
ICE


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #19 from siarhei dot siamashka at gmail dot com  2010-05-17 09:06 -------
Can anybody knowledgeable verify whether it was commit r151790 (
http://repo.or.cz/w/official-gcc.git/commit/9dbb96fec5e08762f97dda771522283f1fe9710f
) that is causing troubles when __builtin_unreachable() is used in the default
switch case? Unfortunately I could not add Andreas Krebbel to CC for this bug.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[jakub at gcc dot gnu dot org]

------- Comment #20 from jakub at gcc dot gnu dot org  2010-05-17 09:08 -------
Perhaps dup of PR44071 that got fixed recently?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #21 from siarhei dot siamashka at gmail dot com  2010-05-17 10:07 -------
(In reply to comment #18)
> Created an attachment (id=20676)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20676&action=view) [edit]
> powerpc64-broken-unreachable.i
> 
> With the attached file (and '-O2 -c' options):
> 1. powerpc64 crosscompiler running on x86 box - always works fine
> 2. powerpc64 crosscompiler built with gcc 4.3.4 and running on powerpc64 box -
> works fine

Hmm, that was happening because I compiled it with "--disable-checking". When
built with "--enable-checking=release", the ICE reproduces just fine on x86 box
with powerpc64-unknown-linux-gnu crosscompiler.

Well, getting ssh access to a fast powerpc64 box really did miracles :) Even
though the problem does not seem to be that complex after all, painfully long
compile times discouraged running more tests earlier, so even a small mistake
easily could (and apparently did) lead to wrong track.

I'm going to check current 4.5 SVN branch now.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #22 from siarhei dot siamashka at gmail dot com  2010-05-17 11:31 -------
(In reply to comment #20)
> Perhaps dup of PR44071 that got fixed recently?

The problem is still reproducible with SVN rev 159480 in
'branches/gcc-4_5-branch', so the fix from PR44071 does not seem to help here.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[jakub at gcc dot gnu dot org]

------- Comment #23 from jakub at gcc dot gnu dot org  2010-05-17 13:24 -------
Created an attachment (id=20679)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20679&action=view)
gcc46-pr42347.patch

Ah, I see.  returnjump_p is considered onlyjump_p, yet it has side-effect that
prevent it from being optimized away into a normal return or jump to return.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[jakub at gcc dot gnu dot org]

------- Comment #24 from jakub at gcc dot gnu dot org  2010-05-17 17:20 -------
Subject: Bug 42347

Author: jakub
Date: Mon May 17 17:19:46 2010
New Revision: 159496

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159496
Log:
        PR bootstrap/42347
        * cfglayout.c (fixup_reorder_chain): Allow returnjump_p
        to have no fallthru edge.

        * gcc.c-torture/compile/pr42347.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr42347.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfglayout.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[jakub at gcc dot gnu dot org]

------- Comment #25 from jakub at gcc dot gnu dot org  2010-05-17 17:26 -------
Subject: Bug 42347

Author: jakub
Date: Mon May 17 17:26:22 2010
New Revision: 159499

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159499
Log:
        PR bootstrap/42347
        * cfglayout.c (fixup_reorder_chain): Allow returnjump_p
        to have no fallthru edge.

        * gcc.c-torture/compile/pr42347.c: New test.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/g++.dg/ext/asmgoto1.C
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/cfgcleanup.c
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[jakub at gcc dot gnu dot org]

------- Comment #26 from jakub at gcc dot gnu dot org  2010-05-17 17:31 -------
Subject: Bug 42347

Author: jakub
Date: Mon May 17 17:30:54 2010
New Revision: 159500

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159500
Log:
        PR bootstrap/42347
        * cfglayout.c (fixup_reorder_chain): Allow returnjump_p
        to have no fallthru edge.

        * gcc.c-torture/compile/pr42347.c: New test.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/gcc.c-torture/compile/pr42347.c
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/cfglayout.c
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[jakub at gcc dot gnu dot org]

------- Comment #27 from jakub at gcc dot gnu dot org  2010-05-17 17:33 -------
The http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159499
commit was actually for PR44102.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #28 from siarhei dot siamashka at gmail dot com  2010-05-18 10:09 -------
Thanks, this patch fixes bootstrap for powerpc/powerpc64. But still fails for
arm on all the same gcc_assert() in another place. Should a new bug be filed
about this?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[jakub at gcc dot gnu dot org]

------- Comment #29 from jakub at gcc dot gnu dot org  2010-05-18 10:58 -------
Please file a new PR for that, with preprocessed source and all other relevant
info for reproduction.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347

[Bug bootstrap/42347] [4.5/4.6 Regression] sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796

[siarhei dot siamashka at gmail dot com]

------- Comment #30 from siarhei dot siamashka at gmail dot com  2010-06-08 14:49 -------
(In reply to comment #29)
> Please file a new PR for that, with preprocessed source and all other relevant
> info for reproduction.

Thanks, filed PR44469


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347