* varasm.c (struct constant_descriptor_tree): Add hash field.
	(const_desc_hash): Just return hash field.
	(const_desc_eq): If hash values are different, return 0 immediately.
	(output_constant_def): Compute hash field of temporary key, use
	htab_find_slot_with_hash instead of htab_find_slot.  Set hash in
	newly built constant descriptor.
	(lookup_constant_def): Compute hash field of temporary key, use
	htab_find_with_hash instead of htab_find.

From-SVN: r99813