* arm.c (arm_override_options): Use arm_ld_sched rather than testing
a bit in tune_flags.
(const_double_needs_minipool): Likewise.  Split most of the code out
into ...
(arm_const_double_inline_cost): ... new function here.
* arm-protos.h (arm_const_double_inline_cost): Add prototype.
* arm.h (EXTRA_CONSTRAINT_STR_ARM): Add D[abc] constraints for double-
word constants of length 2, 3 and 4 insns respectively.
(CONSTRAINT_LEN): The 'D' prefix is a 2-letter constraint.
* arm.md (arm_movdi, movdf_soft_insn): Add alternatives for D[abc]
constraints.  Set insn lenghts accordingly.

From-SVN: r90962