[Bug target/88195] misleading error message for unsupported builtin

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88195

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45093
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45093&action=edit
gcc9-pr88195.patch

That is because the recent def_builtin2 change made it diverge from what
def_builtin is doing, in particular if it needs ISA_64BIT, but !TARGET_64BIT,
return NULL immediately rather than trying to register something.  Unlike other
ISA options, -m64 vs. -m32 vs. -mx32 can't be changed through target attributes
and so there is no point deferring for later or registering right away.