[Bug target/78105] ICE during LTO bootstrap on AARCH64 with extra options

[tulipawn at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78105

--- Comment #9 from PeteVine <tulipawn at gmail dot com> ---
Ha! It's not about the extra options, thank you! ;)

Completely vanilla environment and gcc 5.4 produce this after a while:

../build-lto-noflags/./gcc/xgcc -B../build-lto-noflags/./gcc/
-B/usr/gcc7/aarch64-linux-gnu/bin/ -B/usr/gcc7/aarch64-linux-gnu/lib/ -isystem
/usr/gcc7/aarch64-linux-gnu/include -isystem
/usr/gcc7/aarch64-linux-gnu/sys-include    -g -O2 -O2  -g -O2 -DIN_GCC    -W
-Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition  -isystem ./include   -fPIC -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector   -fPIC -I. -I.
-I../.././gcc -I../../../libgcc -I../../../libgcc/. -I../../../libgcc/../gcc
-I../../../libgcc/../include  -DHAVE_CC_TLS  -o _muldi3.o -MT _muldi3.o -MD -MP
-MF _muldi3.dep -DL_muldi3 -c ../../../libgcc/libgcc2.c -fvisibility=hidden
-DHIDE_EXPORTS
In file included from /usr/include/string.h:630:0,
                 from ../../../libgcc/../gcc/tsystem.h:100,
                 from ../../../libgcc/libgcc2.c:27:
/usr/include/aarch64-linux-gnu/bits/string2.h: In function ‘__strspn_c2’:
/usr/include/aarch64-linux-gnu/bits/string2.h:1039:3: internal compiler error:
Segmentation fault
   while (__s[__result] == __accept1 || __s[__result] == __accept2)
   ^~~~~
0x84173b crash_signal
        ../../gcc/toplev.c:338
0x5d9020 c_parser_binary_expression
        ../../gcc/c/c-parser.c:6855
0x5d9a23 c_parser_conditional_expression
        ../../gcc/c/c-parser.c:6495
0x5d9f4b c_parser_expr_no_commas
        ../../gcc/c/c-parser.c:6412
0x5dc2bf c_parser_expression
        ../../gcc/c/c-parser.c:8608
0x5dd823 c_parser_expression_conv
        ../../gcc/c/c-parser.c:8641
0x5dd89b c_parser_condition
        ../../gcc/c/c-parser.c:5458
0x5df1bf c_parser_paren_condition
        ../../gcc/c/c-parser.c:5477
0x5ebd1f c_parser_while_statement
        ../../gcc/c/c-parser.c:5789
0x5e7293 c_parser_statement_after_labels
        ../../gcc/c/c-parser.c:5265
0x5e608f c_parser_compound_statement_nostart
        ../../gcc/c/c-parser.c:4944
0x5e68b3 c_parser_compound_statement
        ../../gcc/c/c-parser.c:4777
0x5e5853 c_parser_declaration_or_fndef
        ../../gcc/c/c-parser.c:2176
0x5f3ecb c_parser_external_declaration
        ../../gcc/c/c-parser.c:1574
0x5f4907 c_parser_translation_unit
        ../../gcc/c/c-parser.c:1454
0x5f4907 c_parse_file()
        ../../gcc/c/c-parser.c:18173
0xe3f497 c_common_parse_file()
        ../../gcc/c-family/c-opts.c:1087