a register.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_MUST_PASS_IN_STACK (machine_mode @var{mode}, const_tree @var{type})
-This target hook should return @code{true} if we should not pass @var{type}
+@deftypefn {Target Hook} bool TARGET_MUST_PASS_IN_STACK (const function_arg_info @var{&arg})
+This target hook should return @code{true} if we should not pass @var{arg}
solely in registers. The file @file{expr.h} defines a
definition that is usually appropriate, refer to @file{expr.h} for additional
documentation.