Grzegorz Jaskiewicz <gj@pointblue.com.pl> writes:
> On 30 Aug 2009, at 19:14, Tom Lane wrote:
>> Yes, it's bogus. ctid is never passed as NULL. It might point at
>> an "invalid" itempointer (one with ip_posid == 0). Look at the only
>> call site.
> so why do we check if the pointer is valid ?
[ shrug... ] The macro is more general than is necessary in this
specific context. In an actual build I'd expect the compiler to figure
out that the null-pointer test is redundant and optimize it away, since
after inlining it would see that ctid is the address of a local variable.
regards, tom lane