https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105026
Bug ID: 105026
Summary: ICE: SIGSEGV in tree_class_check with __int128 and
_Fract comparison
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: error-recovery
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: mips64el-unknown-linux-gnuabi64
Created attachment 52667
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52667&action=edit
reduced testcase
Compiler output:
$ mips64el-unknown-linux-gnuabi64-gcc testcase.c -wrapper
valgrind,-q,--track-origins=yes
testcase.c:1:1: sorry, unimplemented: GCC cannot support operators with integer
types and fixed-point types that have too many integral and fractional bits
together
1 | int i = (__int128) 0 == (_Fract) 0;
| ^~~
==15373== Invalid read of size 2
==15373== at 0x969319: tree_class_check (tree.h:3573)
==15373== by 0x969319: shorten_compare(unsigned int, tree_node**,
tree_node**, tree_node**, tree_code*) (c-common.cc:3197)
==15373== by 0x8DE4F9: build_binary_op(unsigned int, tree_code, tree_node*,
tree_node*, bool) (c-typeck.cc:12746)
==15373== by 0x8E2BB1: parser_build_binary_op(unsigned int, tree_code,
c_expr, c_expr) (c-typeck.cc:3821)
==15373== by 0x9093C9: c_parser_binary_expression(c_parser*, c_expr*,
tree_node*) (c-parser.cc:8036)
==15373== by 0x90A50B: c_parser_conditional_expression(c_parser*, c_expr*,
tree_node*) (c-parser.cc:7606)
==15373== by 0x90AD30: c_parser_expr_no_commas(c_parser*, c_expr*,
tree_node*) (c-parser.cc:7521)
==15373== by 0x90DF0C: c_parser_initializer (c-parser.cc:5218)
==15373== by 0x90DF0C: c_parser_initializer(c_parser*) (c-parser.cc:5210)
==15373== by 0x92354E: c_parser_declaration_or_fndef(c_parser*, bool, bool,
bool, bool, bool, tree_node**, vec<c_token, va_heap, vl_ptr>*, bool,
tree_node*, oacc_routine_data*, bool*) (c-parser.cc:2281)
==15373== by 0x92C7E3: c_parser_external_declaration(c_parser*)
(c-parser.cc:1779)
==15373== by 0x92D22B: c_parser_translation_unit (c-parser.cc:1652)
==15373== by 0x92D22B: c_parse_file() (c-parser.cc:23357)
==15373== by 0x98F2DD: c_common_parse_file() (c-opts.cc:1240)
==15373== by 0xF383AD: compile_file() (toplev.cc:452)
==15373== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==15373==
testcase.c:1:1: internal compiler error: Segmentation fault
0xf382cf crash_signal
/repo/gcc-trunk/gcc/toplev.cc:322
0x969319 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
/repo/gcc-trunk/gcc/tree.h:3573
0x969319 shorten_compare(unsigned int, tree_node**, tree_node**, tree_node**,
tree_code*)
/repo/gcc-trunk/gcc/c-family/c-common.cc:3197
0x8de4f9 build_binary_op(unsigned int, tree_code, tree_node*, tree_node*, bool)
/repo/gcc-trunk/gcc/c/c-typeck.cc:12746
0x8e2bb1 parser_build_binary_op(unsigned int, tree_code, c_expr, c_expr)
/repo/gcc-trunk/gcc/c/c-typeck.cc:3821
0x9093c9 c_parser_binary_expression
/repo/gcc-trunk/gcc/c/c-parser.cc:8036
0x90a50b c_parser_conditional_expression
/repo/gcc-trunk/gcc/c/c-parser.cc:7606
0x90ad30 c_parser_expr_no_commas
/repo/gcc-trunk/gcc/c/c-parser.cc:7521
0x90df0c c_parser_initializer
/repo/gcc-trunk/gcc/c/c-parser.cc:5218
0x90df0c c_parser_initializer
/repo/gcc-trunk/gcc/c/c-parser.cc:5210
0x92354e c_parser_declaration_or_fndef
/repo/gcc-trunk/gcc/c/c-parser.cc:2281
0x92c7e3 c_parser_external_declaration
/repo/gcc-trunk/gcc/c/c-parser.cc:1779
0x92d22b c_parser_translation_unit
/repo/gcc-trunk/gcc/c/c-parser.cc:1652
0x92d22b c_parse_file()
/repo/gcc-trunk/gcc/c/c-parser.cc:23357
0x98f2dd c_common_parse_file()
/repo/gcc-trunk/gcc/c-family/c-opts.cc:1240
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ mips64el-unknown-linux-gnuabi64-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-mips64el/bin/mips64el-unknown-linux-gnuabi64-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-7721-20220319135312-gb60bc913cca-checking-yes-rtl-df-extra-mips64el/bin/../libexec/gcc/mips64el-unknown-linux-gnuabi64/12.0.1/lto-wrapper
Target: mips64el-unknown-linux-gnuabi64
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl
--with-sysroot=/usr/mips64el-unknown-linux-gnuabi64 --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=mips64el-unknown-linux-gnuabi64
--with-ld=/usr/bin/mips64el-unknown-linux-gnuabi64-ld
--with-as=/usr/bin/mips64el-unknown-linux-gnuabi64-as --disable-multilib
--with-abi=64 --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r12-7721-20220319135312-gb60bc913cca-checking-yes-rtl-df-extra-mips64el
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220319 (experimental) (GCC)
