Thank you for your reply, As I know, operand 0 of call is the address of called function; operand 1 is the number of arguments; operand 2 is the number of args as registers. Therefore, where is the info passed to call ??? As I would like to change the target instruction of call based on the attribute of the called function, I need the info passed to call pattern name.
Could you please explain more about your idea. Phung On Thu, Sep 2, 2010 at 7:49 PM, Georg Lay <a...@gjlay.de> wrote: > Phung Nguyen schrieb: >> Dear all, >> >> I am porting GCC to a new target. I don't know how to get attribute of >> callee of a call. >> >> I defined a new attribute to assign to a function but when writing for >> pattern name "call" or "call_value", I don't know how to know if the >> callee is assigned the attribute. As the code for the call depends on >> the attribute of the callee, I need to get the corresponding function >> decl tree. As the operand of "call" or "call_value" might be >> SYMBOL_REF (direct call) or REG (indirect call), I don't know how to >> get the function declaration (fndecl). >> >> Could you please advise me a solution for it? I highly appreciate your help. > > Try this: > > -- Store that info in the CUMULATIVE_ARGS object > -- Pass the info in a "call cookie" as last argument of > the function like this: FUNCTION_ARG resp. FUNCTION_ARG_ADVANCE > get called with mode=VOIDmode. Return a CONST_INT and evaluate > the respective operand of call insn resp. call_calue insn. > > > > > >
