Hi Jakub, Thank you for your help.
For direct call, I solved the problem based on your suggestion. For indirect call, I don't understand much your idea. Could you please clarify it? Phung On Thu, Sep 2, 2010 at 7:59 PM, Jakub Jelinek <ja...@redhat.com> wrote: > On Thu, Sep 02, 2010 at 07:18:29PM +0700, Phung Nguyen wrote: >> 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). > > From SYMBOL_REF you just look at SYMBOL_REF_DECL, which will most often be a > FUNCTION_DECL of the called function. > For indirect call, most often (unless the optimizers have done a bad job) > you don't know what function will be called. So, if your attribute is > supposed to change behavior of a call, including indirect calls, you'd > better make it a type attribute and arrange during expand to use a different > call pattern if the called function's type has that attribute. At final > time for indirect calls the called fn FUNCTION_TYPE is no longer available. > > Jakub >
