[Bug rtl-optimization/114931] ICE in get_alias_set when building tcl with -std=c23

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114931

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
With -Wuninitialized, it dies in an earlier pass:
```
# gcc -c tclStubLib.i -std=c23 -Wuninitialized
during GIMPLE pass: early_uninit
/var/tmp/portage/dev-lang/tcl-8.6.14/work/tcl8.6.14/generic/tclStubLib.c: In
function ‘Tcl_InitStubs’:
/var/tmp/portage/dev-lang/tcl-8.6.14/work/tcl8.6.14/generic/tclStubLib.c:119:1:
internal compiler error: in get_alias_set, at alias.cc:954
  119 | }
      | ^
[...]
```