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.
