[gcc-in-cxx] Return reg_class from branch_target_register_class

[Ian Lance Taylor]

This patch changes the target hook branch_target_register_class to
return an enum reg_class rather than an int.  There are other hooks in
target.h which already return reg_class, and this one should as well.
This avoids an enum mismatch in bt-load.c.

This also corrects the prototype of the needs_block_p prototype, which
broke due to a bad merge.

Committed to gcc-in-cxx branch.

Ian


2009-01-31  Ian Lance Taylor  <iant@google.com>

	* target.h (struct sched): Correct needs_block_p prototype.
	(struct gcc_target): Change return type of
	branch_target_register_class to enum reg_class.
	* target-def.h (TARGET_BRANCH_TARGET_REGISTER_CLASS): Change to
	default_branch_target_register_class.
	* targhooks.h (default_branch_target_register_class): Declare.
	* targhooks.c (default_branch_target_register_class): Define.


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