restrict qualifier on member functions (restrict this pointer)

Question

Note: To clarify, the question is not about the use of the restrict keyword in general, but specifically about applying it to member functions

Answer 1

I'm afraid that I don't clearly understand why you're talking about this.

restrict specifies that a pointer is not overlapped with others. So, compilers can assume the memory regions pointed by restrict pointers are not dependent, which allows more aggressive optimizations. __restrict__ would be much more effective when used for other pointer variables than this.

So, what would be a case where one would actually want to give a member a restrict qualifier and where it makes sense?

Just recall a representative case of using restrict pointers in memcpy:

void Foo::MyCompute(__restrict__ char* bufA, __restrict__ char* BufB)
{
}