AnsweredAssumed Answered

AMD compiler issues?

Question asked by qqchose on Jul 5, 2013
Latest reply on Jul 8, 2013 by qqchose

Hi,

 

We have issues with our kernel. It’s look like compiler issues.

 

Our kernel is big then I cannot write it down here.

 

I use AMD_Catalyst_13.6_Beta2

My video card is “AMD Radeon HD 6900 Series”

 

Our kernel works on NVIDIA’s card. But, when we try on ATI, it’s not working. I'm trying to investigate. I added a debug buffer to return information to see what happen in kernel (CodeXL just crash each time I try to use it...). I added a line like this.

 

myDebugBuffer[index].MyTestVariable = 12456.0f;

 

Now, our kernel is working. Nothing uses the debug buffer. It’s just a write only buffer to read back when the kernel is done. I compiled with “AMD APP kernelAnalyser2” both versions (with and without this debug line). I was surprised how many differences there are between both versions. The IL code with the debug line is twice smaller (365 Ko vs 622 Ko). It’s not the first time we got an issues and adding a random line “fix” our kernel.

 

Are there know issues with AMD compiler? Are there trap we can check to avoid and fix this kind of bug?

 

Thanks

Outcomes