[Bug target/91767] [10 regression] After r274953, clang-compiled xgcc segfaults during RTL pass: stv

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91767

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For building gcc with ubsan, you should configure
--with-build-config=bootstrap-ubsan, rather than trying to inject the flags in
other ways.
Anyway, for the ICE, it would be interesting to put a breakpoint where the
general_scalar_constructor object is constructed and see how the subobject is
initialized (before anything is added into the hash_map) when compiled with
clang.