difference in calculation result when using gcc vs Visual studio and optimisation flag

Andrew Haley aph@redhat.com
Thu Apr 26 09:58:00 GMT 2018


On 04/26/2018 10:26 AM, Jack Andrews wrote:
> Maybe I'm being idealistic, but why should optimization change results?​

Most likely, the program is undefined.  There are other possibilities
to do with floating-point arithmetic.  Sometimes a buggy compiler.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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