* read-rtl.c (struct macro_traverse_data): Add unknown_mode_attr
field.
(mode_attr_index): Remove check for defined attribute. Remove
infile parameter. Change all callers.
(apply_mode_maps): Add unknown parameter. Change caller. Always
return after finding attribute.
(apply_macro_to_rtx): Add unknown_mode_attr parameter. Change
callers.
(apply_macro_traverse): Set mtd->unknown_mode_attr.
(read_rtx): Use mtd.unknown_mode_attr to check for an undefined
attribute used for a mode.
From-SVN: r99829
