https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118023
Bug ID: 118023
Summary: ICE: verify_gimple failed: 'bit_field_ref' of
non-mode-precision operand at -O1 and above when
reinterpreting _BitInt() as _Complex
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 59855
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59855&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O testcase.c
testcase.c: In function 'foo':
testcase.c:4:1: error: 'bit_field_ref' of non-mode-precision operand
4 | foo()
| ^~~
# VUSE <.MEM_5(D)>
_6 = BIT_FIELD_REF <MEM <_BitInt(63)> [(void *)&b], 16, 0>;
during GIMPLE pass: ifcombine
testcase.c:5:1: internal compiler error: verify_gimple failed
0x2ddeff1 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0x16a65bd verify_gimple_in_cfg(function*, bool, bool)
/repo/gcc-trunk/gcc/tree-cfg.cc:5682
0x14ff1c4 execute_function_todo
/repo/gcc-trunk/gcc/passes.cc:2101
0x14ff73e execute_todo
/repo/gcc-trunk/gcc/passes.cc:2155
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-20241213003513-r15-6187-gd136fa00f0d5fa-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/15.0.0/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 --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20241213003513-r15-6187-gd136fa00f0d5fa-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20241213 (experimental) (GCC)
