Intel® Fortran Compiler
Build applications that can scale for the future with optimized code designed for Intel® Xeon® and compatible processors.
29276 Discussions

Inconsistency in results

lklawrie
Beginner
‎12-13-2008 02:23 PM
438 Views

I'm wondering if anyone else has seen or noticed this in the V11 compiler.

We have a large application with around 200 files in our "test suite". I've always been happy with CVF and IVF because two runs with modified code in one area (even moving variables around) would yield the same answers except for the obvious places where changes occurred.

(By contrast, Microsoft Powerstation for those that can remember it, couldn't be relied on).

Since moving to V11, I've noticed this several times (or actually more often than not). Now, it could be uninitialized variables that for some reason aren't tripping my "check uninitialized" compiler setting.

I'm just wondering if others have seen this behavior and other causes that I should investigate.

Linda

0 Kudos

Link Copied

1 Reply
TimP
Honored Contributor III
‎12-13-2008 03:42 PM
438 Views

Certain errors (array bound over-runs, for example) become more serious with more aggressive function in-lining. Aliasing violations (requiring setting of -assume dummy_aliases or not setting -safe-cray-ptr) have bitten us in 10.1 and 11.0, where they didn't break anything with earlier compilers.

0 Kudos
Copy link
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.