* reload.c (find_reloads_address_1): Handle PLUS expressions resulting
from register elimination as PRE_MODIFY / POST_MODIFY increments.
Do not attempt to handle MEM inside auto-inc expressions.
* reload1.c (eliminate_regs_1): Do not attempt to handle elimination
of a register modified by an auto-inc expression. However, do handle
elimination of a register used as PRE_MODIFY / POST_MODIFY increment.
(elimination_effects): Prohibit elimination of a register modified
by an auto-inc expression. Disable register elimination rules whose
target register is modified by an auto-inc expression with variable
increment.
From-SVN: r122318
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