GO_IF_LEGITIMATE_ADDRESS handling different addressing modes for load/store

[Ayonam Ray]

Hi,

My architecture allows base + immed and base + index for loads but
allows only base + immed for stores.  How do I differentiate between
them in the macro GO_IF_LEGITIMATE_ADDRESS?  I only get the MEM rtx in
that macro and have no clue whether the operand is an address for a
load or a store.  Is there any other way that I can differentiate
between them?

Thanks and regards
Ayonam