Query with legitimate_constant_p

[Daniel Towner]

Hi all,

 I am writing a new port of GCC. I want to prevent symbol_refs from being
used as immediate operands, so I am specifically rejecting these in
legitimate_constant_p. However, this also means that the addresses of
symbol_refs can't be computed (e.g, loading the address into a  register),
where previously a `mov??3' instruction was used to move the  symbol_ref
address into a register. This no longer works, as the mov  instruction can't
accept an immediate symbol_ref any more. How do I fix  this? Do I need an
instruction pattern which just matches a symbol_ref  and loads its value
into a register, or do I need to use a define_expand to explicitly create
such an instruction?

 Thanks,

  Dan.

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Daniel Towner
picoChip Designs Ltd.
Riverside Buildings
108, Walcot Street, BATH, BA1 5BG, UK
+44 (0) 7786 702589
dant@picochip.com