(iorscc): New recognizer.

2 new recognizers for sub;subb.  1 new recognizer for addi;subb.
(movstrsi): Remove predicates.  Set inline threshold to 8.
(umulsidi3): Change predicates to nonimmediate_operand.
New recognizer for multiply-by-immediate.
(andsi3): Add `!' for register alternative.
(vdepi_ior, vdepi_and): New recognizers.
(vextru rx,1,ry, vextrs rx,1,ry): New recognizers.
(call, call_value): If PIC, emit USE for for
PIC_OFFSET_TABLE_REGNUM.  Use PIC_OFFSET_TABLE_REGNUM rather than 19.

From-SVN: r6294