https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107246
Bug ID: 107246 Summary: gcc trunk crash in verify_gimple_in_cfg Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: shaohua.li at inf dot ethz.ch Target Milestone: --- % gcc-tk -v Using built-in specs. COLLECT_GCC=gcc-tk COLLECT_LTO_WRAPPER=/zdata/shaoli/compilers/ccbuilder-compilers/gcc-7c059880fca175589efc8e06ef458020a005658d/libexec/gcc/x86_64-pc-linux-gnu/13.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../configure --disable-multilib --disable-bootstrap --enable-languages=c,c++ --prefix=/zdata/shaoli/compilers/ccbuilder-compilers/gcc-7c059880fca175589efc8e06ef458020a005658d Thread model: posix Supported LTO compression algorithms: zlib gcc version 13.0.0 20221013 (experimental) (GCC) % % gcc-tk -w -O0 a.c % % gcc-tk -w -O3 a.c a.c: In function ‘e’: a.c:8:1: error: invalid position or size operand to ‘bit_field_ref’ 8 | e() { | ^ _ifc__16 = BIT_FIELD_REF <_ifc__15, 12, 0xffffffffffffffffffffffffffffffc0>; during GIMPLE pass: ifcvt a.c:8:1: internal compiler error: verify_gimple failed 0x205825e internal_error(char const*, ...) ???:0 0x10890f1 verify_gimple_in_cfg(function*, bool) ???:0 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. % % cat a.c struct { long a; signed : 9; signed : 30; unsigned b : 12 } c; d; e() { for (; d;) f(c.b); } % Compiler explorer: https://godbolt.org/z/8aGhfE5PM