[J3] function references and optimization
Malcolm Cohen
malcolm at nag-j.co.jp
Tue Oct 9 22:01:17 EDT 2018
Van Snyder asks:
> Does the permission in 10.1.5.2.4p2, under the rubric "Evaluation of
>numeric intrinsic operations" include statement functions?
I refer you to my earlier message:
> No matter what kind of function F is, if the processor “knows” that
> the value of the function is y, it need not evaluate the function
> reference at all.
This is nothing to do with statement functions and everything to do with knowing the value of a function reference. Any expression or subexpression whose value is “known” need not be evaluated.
Cheers,
--
..............Malcolm Cohen, NAG Oxford/Tokyo.
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