(define_function_unit for memory): Memory is pipelined.

(sCC patterns): Use %char notation instead of nested if stmts.
(branch matchers): Likewise.
(incscc, negscc): Likewise.  Add ? constraint for 3-insn alternative.
(incscc): Split into `incscc' and `decscc' to make this really
match.
(incscc/decscc special cases): New patterns using carry bit.

(many patterns): Use canonical address format.  Use %r
register notation.  Use GEN_INT.

(main move SF recognizer): Allow 0 for copying to general register.

(zero_extendhisi2): Remove DEFINE_EXPAND.
(zero_extendqihi2): Likewise.
(zero_extendqisi2): Likewise.
(comment before sign extension): Remove the lie.

From-SVN: r3278