How to prevent optimisation of a specific loop?

[zugvogel]

Hello,
Can anyone tell me how to prevent a loop from being optimised?

EDIT: My mistake: a typing error in the code.
But I'm still interested to know: is there a directive that can be placed before the loop to prevent it from being optimised?

[Tim_Gallagher]

Quoting - zugvogel

Hello,
Can anyone tell me how to prevent a loop from being optimised?

EDIT: My mistake: a typing error in the code.
But I'm still interested to know: is there a directive that can be placed before the loop to prevent it from being optimised?

You can put the NOUNROLL, NOVECTOR, NOSWP, NOPREFETCH, NOPARALLEL depending on what you're trying to prevent.

http://www.intel.com/software/products/compilers/docs/fmac/doc_files/source/extfile/lref_for/source_files/pgjcdor.htm

Tim

[zugvogel]

That was exactly what I was looking for - thanks!