(FP_REGNO_P): New macro for intra file usage.

(FP_REGNO_P): New macro for intra file usage.
(REGNO_OK_FOR_FP_P): Use FP_REGNO_P.
(FUNCTION_VALUE_REGNO_P): Revert last change.
(CONDITIONAL_REGISTER_USAGE): Partially revert last changes;
Make non-existing 1.0 fp regs fixed, including odd-numbered regs.
(enum reg_class): Get rid of SNAKE_FP_REGS, GENERAL_OR_SNAKE_FP_REGS,
and NON_SHIFT_REGS.
(REG_CLASS_NAMES): Likewise.
(REG_CLASS_CONTENTS): Likewise.
(REGNO_REG_CLASS): Likewise.
(HARD_REGNO_MODE_OK): Corresponding changes.  Don't force 1.0 fpregs
to even regno here; fixed_regs does the job better.
(FP_REG_CLASS_P): Get rid of SNAKE_FP_REGS.
(REG_CLASS_FROM_LETTER, case 'z'): Deleted.
(HARD_REGNO_NREGS): Partially revert last change.
(CLASS_MAX_NREGS): Partially revert last change.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@7438 138bc75d-0d04-0410-961f-82ee72b054a4