https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115879
--- Comment #5 from Zdenek Sojka <zsojka at seznam dot cz> --- Created attachment 59375 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59375&action=edit testcase using memcpy $ x86_64-pc-linux-gnu-gcc -O -fharden-control-flow-redundancy -fnon-call-exceptions testcase3.c testcase3.c: In function 'foo': testcase3.c:7:30: warning: '__builtin_memcpy' writing 3 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=] 7 | x *= *(_Complex __int128 *)__builtin_memcpy((char *)&y - 1, &x, 3); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ testcase3.c:2:19: note: at offset -1 into destination object 'y' of size 32 2 | _Complex __int128 y; | ^ testcase3.c:8:1: error: missing REG_EH_REGION note at the end of bb 6 8 | } | ^ during RTL pass: subreg3 testcase3.c:8:1: internal compiler error: verify_flow_info failed 0x2c8a99e internal_error(char const*, ...) /repo/gcc-trunk/gcc/diagnostic-global-context.cc:517 0x103f99e verify_flow_info() /repo/gcc-trunk/gcc/cfghooks.cc:287 0x14853f7 execute_function_todo /repo/gcc-trunk/gcc/passes.cc:2113 0x148594e 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.
