https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113361
Bug ID: 113361
Summary: wrong code with __builtin_mul_overflow_p() and
_BitInt() at -O0
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code, wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 57059
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57059&action=edit
reduced testcase
Output:
$ x86_64-pc-linux-gnu-gcc testcase.c
$ ./a.out
Aborted
It fails at different -On levels, depending on the value of 'x'.
If the type of 'x' is changed to _BitInt(63), it ICEs instead:
$ x86_64-pc-linux-gnu-gcc testcase.c
during GIMPLE pass: bitintlower0
testcase.c: In function 'foo':
testcase.c:2:1: internal compiler error: in build_bitint_type, at tree.cc:7178
2 | foo(_BitInt(63) x)
| ^~~
0x89c77a build_bitint_type(unsigned long, int)
/repo/gcc-trunk/gcc/tree.cc:7178
0x2706118 handle_operand_addr
/repo/gcc-trunk/gcc/gimple-lower-bitint.cc:2244
0x270fc92 lower_mul_overflow
/repo/gcc-trunk/gcc/gimple-lower-bitint.cc:4291
0x270fc92 lower_call
/repo/gcc-trunk/gcc/gimple-lower-bitint.cc:5101
0x271a4b9 gimple_lower_bitint
/repo/gcc-trunk/gcc/gimple-lower-bitint.cc:6524
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.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-7215-20240112190107-g8b447fa89d5-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-7215-20240112190107-g8b447fa89d5-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.1 20240112 (experimental) (GCC)
