2008-05-27 Andreas Krebbel <krebbel1@de.ibm.com>
* reload.c: (find_reloads): Skip alternatives according to the
"enabled" attribute. Constify the constraint variable.
* recog.c (get_attr_enabled): Add default implementation.
(extract_insn): Set the alternative_enabled_p array
in the recog_data struct.
(preprocess_constraints, constrain_operands): Skip
alternatives according to the "enabled" attribute
* recog.h (struct recog_data): New field alternative_enabled_p.
(skip_alternative): New inline function.
* regclass.c: (record_operand_costs): Check the "enabled"
attribute.
(record_reg_classes): Skip alternative according to the
"enabled" attribute.
* doc/md.texi: Add documention for the "enabled" attribute.
From-SVN: r136012
