On Sat, Feb 23, 2013 at 5:25 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Really? Can't "INT_MAX - a" overflow?
I guess I shouldn't have tried summarizing the code and just pasted
some real code in for fear of getting it wrong. I was thinking of
unsigned arithmetic when I wrote that.
The point being that the compiler isn't going to make optimization
based on code that comes later if that code wouldn't have run in the
same flow of execution.
--
greg