dcompute issues?

[Bruce Carneal]

I'm trying to get the dcompute saxpy test program to run and am 
having some issues.

The first issue was an ldc2 1.24.0 seg fault over this line:
@compute(CompileFor.deviceOnly) module ...

I commented out the @compute... annotation leaving the top line 
module declaration after which the test program compiled and 
linked but it errored out when attempting to queue up the saxpy 
kernel itself. Everything up to the queue attempt went well: 
Platform initialization, getDevices, Context, Buffer! 
allocations, data copies, ... so it appears that the 
libdcompute.a build is fine.

I examined the newly created kernels_cuda210_64.ptx file and did 
not find saxpy code.  I only found an 8-liner that, from the 
mangled name, looks like a GlobalIndex calculation.

If this problem rings a bell with anyone in the LDC community, 
please chime in.  I'd *really* prefer to work with dcompute 
rather than fall back to CUDA shimming or SycL exploration.

Finally, many thanks for maintaining/advancing LDC.  It has been 
great for all of my CPU/SIMD work.