PR target/48032
* config/rs6000/rs6000.c (offsettable_ok_by_alignment): Do not
presume symbol_refs without a symbol_ref_decl are suitably
aligned, nor other trees we may see here. Handle anchor symbols.
(legitimate_constant_pool_address_p): Comment. Add mode param.
Check cmodel=medium addresses. Adjust all calls.
(rs6000_emit_move): Don't call offsettable_ok_by_alignment on
creating cmodel=medium optimized access to locals.
* config/rs6000/constraints.md (R): Pass QImode to
legitimate_constant_pool_address_p.
* config/rs6000/predicates.md (input_operand): Pass mode to
legitimate_constant_pool_address_p.
* config/rs6000/rs6000-protos.h (legitimate_constant_pool_address_p):
Update prototype.
From-SVN: r170976
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