[Bug target/90363] or1k: Extra mask insn after load from memory

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90363

Segher Boessenkool <segher at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |segher at gcc dot gnu.org

--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Trying 13 -> 14:
   13: r51:QI=[r50:SI+low(`*.LANCHOR0')]
      REG_DEAD r50:SI
   14: r43:SI=zero_extend(r51:QI)
      REG_DEAD r51:QI
Failed to match this instruction:
(set (reg:SI 43 [ g_doswap.0_2+-3 ])
    (zero_extend:SI (mem/v/c:QI (lo_sum:SI (reg/f:SI 50)
                (symbol_ref:SI ("*.LANCHOR0") [flags 0x182])) [0 g_doswap+0 S1
A8])))

The mem arg in that does not match nonimmediate_operand, since it is const.
You want something like reg_or_mem_operand.