On 07/23/2015 11:09 PM, Ajit Kumar Agarwal wrote: > From the description of the definition of the macro > RETURN_ADDRESS_POINTER_REGNUM ,
> Does this impact the performance or correctness of the compiler? On what > cases it is applicable to define for the given architecture? This is used to help implement the __builtin_return_address builtin function. There is some default code for this, so it may work OK without defining RETURN_ADDRESS_POINTER_REGNUM. If the default code doesn't work, then you may need to define RETURN_ADDRESS_POINTER_REGNUM. Usually, it is trivial to make __builtin_return_address work for leaf functions, non-trivial to make it work for non-leaf functions, and difficult to impossible to make it work for level != 0. You will have better luck using the unwind info than __builtin_return_address. This is an optional builtin function, so there is no performance or correctness issue here. Jim
