[Bug middle-end/94267] New: Missed folding of &TARGET_MEM_REF

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94267

            Bug ID: 94267
           Summary: Missed folding of &TARGET_MEM_REF
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

Seen in PR94266 IVOPTs can generate &TARGET_MEM_REF[ptr_1 + 0] which we
obviously should represent as plain ptr_1, possibly casted.  Likewise
&TARGET_MEM_REF[ptr_1 + 4] should be canonicalized to &MEM_REF[ptr_1 + 4]
or even a POINTER_PLUS_EXPR.