PR middle-end/78419
* multiple_target.c (get_attr_len): Start with argnum and increment
argnum on every arg. Use strchr in a loop instead of counting commas
manually.
(get_attr_str): Increment argnum for every comma in the string.
(separate_attrs): Use for instead of while loop, simplify.
(expand_target_clones): Rename defenition argument to definition.
Free attrs and attr_str even when diagnosing errors. Temporarily
change input_location around targetm.target_option.valid_attribute_p
calls. Don't emit warning or errors if that function fails.
* gcc.target/i386/pr78419.c: New test.
From-SVN: r242608
