https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117417
Bug ID: 117417
Summary: ICE: verify_gimple failed: non-top-level
'bit_field_ref' with -Ofast
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 59520
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59520&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -Ofast testcase.c
testcase.c: In function 'foo':
testcase.c:17:1: error: non-top-level 'bit_field_ref'
17 | foo ()
| ^~~
# VUSE <.MEM_11>
_4 = REALPART_EXPR <BIT_FIELD_REF <MEM[(V *)0B], 32, 0>>;
during GIMPLE pass: forwprop
testcase.c:17:1: internal compiler error: verify_gimple failed
0x2c9c5fe internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:518
0x1620e5d verify_gimple_in_cfg(function*, bool, bool)
/repo/gcc-trunk/gcc/tree-cfg.cc:5682
0x1486ed4 execute_function_todo
/repo/gcc-trunk/gcc/passes.cc:2102
0x148744e execute_todo
/repo/gcc-trunk/gcc/passes.cc:2156
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-r15-4860-20241101203111-g6a2e8913df6-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-r15-4860-20241101203111-g6a2e8913df6-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20241102 (experimental) (GCC)
