https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116349
--- Comment #6 from seurer at gcc dot gnu.org ---
I am seeing this same failure in doing a bootstrap build during stage 2 on
powerpc64:
/home/seurer/gcc/git/build/gcc-trunk-bootstrap/./prev-gcc/xg++
-B/home/seurer/gcc/git/build/gcc-trunk-bootstrap/./prev-gcc/
-B/home/seurer/gcc/git/install/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/bin/
-nostdinc++
-B/home/seurer/gcc/git/build/gcc-trunk-bootstrap/prev-powerpc64le-unknown-linux-gnu/libstdc++-v3/src/.libs
-B/home/seurer/gcc/git/build/gcc-trunk-bootstrap/prev-powerpc64le-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/home/seurer/gcc/git/build/gcc-trunk-bootstrap/prev-powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/git/build/gcc-trunk-bootstrap/prev-powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libstdc++-v3/libsupc++
-L/home/seurer/gcc/git/build/gcc-trunk-bootstrap/prev-powerpc64le-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/home/seurer/gcc/git/build/gcc-trunk-bootstrap/prev-powerpc64le-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp -I.
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp/../include
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp/include -g -O2 -fno-checking
-gtoggle -W -Wall -Wno-narrowing -Wwrite-strings -Wmissing-format-attribute
-pedantic -Wno-long-long -Werror -fno-exceptions -fno-rtti
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp -I.
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp/../include
-I/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp/include -c -o lex.o -MT
lex.o -MMD -MP -MF .deps/lex.Tpo
/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp/lex.cc
during RTL pass: ce1
/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp/lex.cc: In function 'void
_cpp_clean_line(cpp_reader*)':
/home/seurer/gcc/git/gcc-trunk-bootstrap/libcpp/lex.cc:1002:1: internal
compiler error: in expand_simple_binop, at optabs.cc:1264
1002 | }
| ^
0x13742127 internal_error(char const*, ...)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/diagnostic-global-context.cc:491
0x13703dfb fancy_abort(char const*, int, char const*)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/diagnostic.cc:1772
0x119494bf expand_simple_binop(machine_mode, rtx_code, rtx_def*, rtx_def*,
rtx_def*, int, optab_methods)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/optabs.cc:1264
0x113fec23 force_operand(rtx_def*, rtx_def*)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/expr.cc:8687
0x113aeb2f copy_to_mode_reg(machine_mode, rtx_def*)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/explow.cc:655
0x11963eab maybe_legitimize_operand
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/optabs.cc:8041
0x11964b7b maybe_legitimize_operands(insn_code, unsigned int, unsigned int,
expand_operand*)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/optabs.cc:8184
0x11964cab maybe_gen_insn(insn_code, unsigned int, expand_operand*)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/optabs.cc:8203
0x11965357 maybe_expand_insn(insn_code, unsigned int, expand_operand*)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/optabs.cc:8258
0x11959aaf emit_conditional_move_1
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/optabs.cc:5229
0x119596d7 emit_conditional_move(rtx_def*, rtx_comparison, rtx_def*, rtx_def*,
machine_mode, int)
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/optabs.cc:5142
0x133c36df noce_emit_cmove
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:1773
0x133c9007 try_emit_cmove_seq
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:3406
0x133c9a73 noce_convert_multiple_sets_1
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:3687
0x133c919b noce_convert_multiple_sets
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:3492
0x133ca8e7 noce_process_if_block
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:4025
0x133ccd03 noce_find_if_block
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:4706
0x133cd66b find_if_header
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:4911
0x133d0eef if_convert
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:6058
0x133d124b rest_of_handle_if_conversion
/home/seurer/gcc/git/gcc-trunk-bootstrap/gcc/ifcvt.cc:6123
