Hi Ian, 2012/4/23 Ian Lance Taylor <i...@google.com>: > Feng LI <nemoking...@gmail.com> writes: > >> Hi Ian, >> >> 2012/4/22 Ian Lance Taylor <i...@google.com>: >>> Feng LI <nemoking...@gmail.com> writes: >>> >>>> Yes, you are right. But how could I reference to a backend defined builtin >>>> function in the middle end (I need to generate the builtin function in the >>>> middle end and expand it in x86 backend)? >>> >>> If the function doesn't have a machine-independent definition, then use >>> a target hook. >> >> Then I remove the duplicate builtin definition in x86 backend. >> I define the builtin function with built_in_class as BUILT_IN_MD in >> builtins.def. > > Sorry, I meant use a target hook to actually generate the call > expression. The target hook can refer to the target-specific builtin > function. Just for confirmation, do you mean by calling this hook: targetm.builtin_decl (unsigned code, bool initialized_p) in the middle end for getting the builtin definition in the backend?
Probably I'm asking a silly question, when is the time of the initialization of the backend builtin functions. I'm refering it in gcc middle end, near OPENMP expansion (omp-low.c) pass. Thanks, Feng > > Ian
