https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114194
--- Comment #6 from Bruce Hoult <bruce at hoult dot org> --- The ICE also happens with bzero(). The ICE does NOT happen with a constant length of 16 of greater, in which case a function call is made instead of expanding inline. With rv64gv or rv64gcv a series of N `sb` are generated (N < 16) With rv64gc_xtheadvector, N >= 6, and -Os a tail call to memset is generated, no ICE. With N < 6 ... ICE. So the problem is only trying to expand memset() or bzero() inline. Does it try to use a vectorised memset? That doesn't happen with rv64gcv. memcpy() does not ICE for any N. I assume the originally reported C++ code is generating a memset() to initialise one of the classes/structs.
