Question About New Option '-fipa-sra': How Does It Work?

[Tom Browder <tom.browder@xxxxxxxxx>]

I see the new -fipa-sra option for gcc 4.5 and its explanation and
wonder how replacing an argument passed by reference with an argument
passed by value is an optimization (I assume something magic is going
on behind the scenes).

Thanks.

-Tom

Thomas M. Browder, Jr.
Niceville, Florida
USA