[Omp] CTOR/DTOR invocation for variables in empty paralleldirectives?

[Diego Novillo]

On Tuesday 01 November 2005 17:15, Tian, Xinmin wrote:

> If users have this type of code, the performance may not be a big
> concern for users. In general, users can always use lower optimization
> (O0 or Od), so the compiler can still generate threaded code for empty
> parallel region by not being smart to remove it.
>
Thanks.  Though what I really need to clarify is whether the compiler is 
*allowed* to elide that construct.

With our current implementation, GCC will remove the whole parallel 
directive regardless of optimization level.  No threaded code will be 
generated with

	#pragma omp parallel private (a)
	  {
	  }

Would the compiler be standard conforming if it converted the above into a 
NOP?


Thanks.