topic Sorry for the delay in in OpenCL* for CPU

Debugger doesn't display local variable

Tar__Alex — Tue, 26 Aug 2014 11:29:30 GMT

I try to debug some opencl kernel in Visual Studio 2013. After entering in kernel debugger show me local variables, but only before row with union operator (#11). Once debug go to row 11 a "Locals" window is cleared. I think this is a bug. (sorry for my english)

__kernel void randn2(float sigma, unsigned int user_k, __global float4* out)
{
	philox4x32_key_t k = {{get_global_id(0), get_global_id(1)}};
	philox4x32_ctr_t c = {{ 0, 0xf00dcafe, 0xdeadbeef, user_k }};
	float4 buf={0, 0, 0, 0};
	float2 cos2;
	union {
		philox4x32_ctr_t c;
		uint4 ui;
		float4 f;
	} u;
	u.c = philox4x32_R(7,c, k);
	u.f = convert_float4(u.ui) / UINT_MAX;

Thanks Alex! I agree that

Jeffrey_M_Intel1 — Wed, 03 Sep 2014 07:39:22 GMT

Thanks Alex! I agree that this looks like a bug. I've replicated the behavior you've described and reported to the development team.

Sorry for the delay in

Jeffrey_M_Intel1 — Wed, 10 Sep 2014 04:23:30 GMT

Sorry for the delay in getting back to you. There are several issues with unions, including support in the kernel builder. We're looking into what can be done. There are many things that need to be prioritized, and your feedback can help. How critical is union support for your application?

In the future it is will be

Tar__Alex — Wed, 10 Sep 2014 04:36:46 GMT

In the future it is will be critical, but not now. Simply in some cases using union is very convenient.

Now I can use workaround.