[Bug target/63636] New: [5 Regression] gcc gets miscompiled during LTO/PGO bootstrap on ppc64

[Bug target/63636] New: [5 Regression] gcc gets miscompiled during LTO/PGO bootstrap on ppc64

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63636

            Bug ID: 63636
           Summary: [5 Regression] gcc gets miscompiled during LTO/PGO
                    bootstrap on ppc64
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
            Target: powerpc64-unknown-linux-gnu

% ../gcc/configure --disable-libsanitizer -disable-libstdcxx-pch
--disable-libvtv --disable-libitm --disable-libcilkrts --disable-libssp
--disable-libgomp --disable-werror --disable-multilib --enable-languages=c,c++
--with-build-config=bootstrap-lto
  % make -j64 BOOT_CFLAGS="-mcpu=power7 -O3 -pipe" STAGE1_CFLAGS="-mcpu=power7
-O3 -pipe" CFLAGS_FOR_TARGET="-mcpu=power7 -O3 -pipe"
CXXFLAGS_FOR_TARGET="-mcpu=power7 -O3 -pipe" profiledbootstrap

... (stagefeedback)

../../../gcc/libgcc/libgcov-merge.c: In function ‘__gcov_merge_ior’:
../../../gcc/libgcc/libgcov-merge.c:69:1: error: unrecognizable insn:
 }
 ^
(insn 53 52 54 6 (set (reg:DI 196 [ D.8309 ])
        (ior:DI (reg:DI 197)
            (reg:DI 182 [ D.8310 ]))) ../../../gcc/libgcc/libgcov-merge.c:68 -1
     (nil))
../../../gcc/libgcc/libgcov-merge.c:69:1: internal compiler error: in
extract_insn, at recog.c:2321

(And many similar ICEs)

trippels@gcc1-power7 libgcc % cat unwind-dw2.i
int a;
void
_Unwind_RaiseException_handler (void)
{
  __builtin_eh_return (a, _Unwind_RaiseException_handler);
}

trippels@gcc1-power7 libgcc % /home/trippels/gcc_build_dir/./gcc/xgcc
-B/home/trippels/gcc_build_dir/./gcc/ unwind-dw2.i
unwind-dw2.i: In function ‘_Unwind_RaiseException_handler’:
unwind-dw2.i:6:1: error: unrecognizable insn:
 }
 ^
(insn 31 30 32 (set (reg:SI 11 11)
        (xor:SI (reg:SI 11 11)
            (const_int -398393344 [0xffffffffe8410000]))) unwind-dw2.i:4 -1
     (nil))
unwind-dw2.i:6:1: internal compiler error: in insn_default_length, at
config/rs6000/rs6000.md:7570
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/63632] [4.9/5 Regression] bootstrap-lto/profiledbootstrap broken by r216566
Date: Fri, 24 Oct 2014 08:26:00 -0000
X-Bugzilla-Reason: CC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc632

--- Comment #5 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #4)
> Fixed.

Thanks! Commits were r216613 (trunk) and r216614 (4.9).

[Bug ipa/63636] [5 Regression] gcc gets miscompiled by ipa-icf during LTO/PGO bootstrap on ppc64

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63636

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING

[Bug ipa/63636] [5 Regression] gcc gets miscompiled by ipa-icf during LTO/PGO bootstrap on ppc64

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63636

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Is this fixed now (why is it in WAITING?)

[Bug ipa/63636] [5 Regression] gcc gets miscompiled by ipa-icf during LTO/PGO bootstrap on ppc64

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63636

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Is this fixed now (why is it in WAITING?)

Because you changed the status to WAITING?
I will retest this once all P1 ICF issues are fixed.

[Bug ipa/63636] [5 Regression] gcc gets miscompiled by ipa-icf during LTO/PGO bootstrap on ppc64

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63636

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

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

--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Looks like the issue is fixed already. Closing.