search for: vcpint

...system-defined intrinsic function dependent on the current work item. (The system knows what work groups are in flight, which is why you need a system-defined intrinsic.) So a kernel function like this: void foo(__global int*A) { __local int vint; __local int *vpint; __local int const *vcpint; __local int volatile vvint; int a = A[0]; vint = a; vvint = a; int a2 = vint; int va2 = vvint; barrier(CLK_LOCAL_MEM_FENCE); A[0] = a2 + va2; } is translated to this, which does pass through Clang, with __local meaning attrib addrspace(2): extern __local void * __get_work...

...on the current work item. (The system knows what > work groups are in flight, which is why you need a system-defined > intrinsic.) > > So a kernel function like this: > > void foo(__global int*A) { > __local int vint; > __local int *vpint; > __local int const *vcpint; > __local int volatile vvint; > int a = A[0]; > vint = a; > vvint = a; > int a2 = vint; > int va2 = vvint; > barrier(CLK_LOCAL_MEM_FENCE); > A[0] = a2 + va2; > } > [Villmow, Micah] This example is incorrect. There is a race condition between t...

> -----Original Message----- > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] > On Behalf Of Peter Collingbourne > Sent: Monday, December 06, 2010 2:56 PM > To: David Neto > Cc: cfe-dev at cs.uiuc.edu; llvmdev at cs.uiuc.edu > Subject: Re: [LLVMdev] [cfe-dev] OpenCL support > > Hi David, > > On Mon, Dec 06, 2010 at 11:14:42AM -0500,

Hi David, On Mon, Dec 06, 2010 at 11:14:42AM -0500, David Neto wrote: > >> It > >> seems it would be a good idea to transform the code so that uses of x > >> become loads and stores from memory, and the address for that memory > >> is returned by a builtin function that itself is dependent on work > >> group ids. > >> > >> I'm