* function.h (struct function): Add function_start_locus.
* cfgexpand.c (gimple_expand_cfg): Use it.
* c-parser.c (c_parser_declaration_or_fndef): Set it.
testsuite/
* gcc.dg/always_inline.c: Place error message on function
name line.
* gcc.dg/winline-6.c: Same.
* gcc.dg/noreturn-1.c: Same.
* gcc.dg/noreturn-7.c: Same.
* gcc.dg/inline-14.c: Same.
* gcc.dg/always_inline3.c: Same.
* gcc.dg/winline-3.c: Same.
* gcc.dg/wtr-func-def-1.c: Same.
* gcc.dg/winline-5.c: Same.
* gcc.dg/winline-7.c: Same.
* gcc.dg/winline-9.c: Same.
* gcc.dg/noreturn-4.c: Same.
* gcc.dg/20041213-1.c: Use column numbers.