[llvm] [NVPTX] Add ptxas verification and kernel test to sm-version test (PR #139543)

[Artem Belevich via llvm-commits]

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@@ -56,6 +56,64 @@
 ; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_121 | FileCheck %s --check-prefix=SM121
 ; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_121a | FileCheck %s --check-prefix=SM121a
 
+; RUN: %if ptxas %{ llc < %s -mtriple=nvptx -mcpu=sm_20 | %ptxas-verify %}
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Artem-B wrote:

Not quite. 

`ptxas-X.Y` means "ptxas version X.Y or newer" which usually aligns with "CUDA SDK version X.Y". You need to find the range of CUDA versions that support the SM you need (https://en.wikipedia.org/wiki/CUDA#GPUs_supported) and the range of versions that support the PTX version you want (https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#release-notes-ptx-release-history)
Then constrain ptxas version to the union of those CUDA version ranges.

https://github.com/llvm/llvm-project/pull/139543