https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114676
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> I've bisected gcc, and issue first appears with gcc commit
> 32955416d8040b1fa1ba21cd4179b3264e6c5bd6.
This just improved DSE but I suspect there might be a way to reproduce it
before that.
Note the rs6000 backend works correctly with vec_sxt/vec_xl because it builds a
MEM_REF directly instead of an INDIRECT_REF.
```
/* Since arg1 may be cast to a different type, just use ptr_type_node
here instead of trying to enforce TBAA on pointer types. */
tree arg1_type = ptr_type_node;
...
/* Use the build2 helper to set up the mem_ref. The MEM_REF could also
take an offset, but since we've already incorporated the offset
above, here we just pass in a zero. */
gimple *g
= gimple_build_assign (lhs, build2 (MEM_REF, lhs_type, aligned_addr,
build_int_cst (arg1_type, 0)));
```
arg1_type is used for the aliasing set ...
