[Openmp-commits] [openmp] [OpenMP][AMDGPU] Adapt dynamic callstack sizes to HIP behavior (PR #74080)

[Michael Halkenhäuser via Openmp-commits]

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@@ -1872,6 +1873,38 @@ struct AMDGPUDeviceTy : public GenericDeviceTy, AMDGenericDeviceTy {
     else
       return Plugin::error("Unexpected AMDGPU wavefront %d", WavefrontSize);
 
+    // To determine the correct scratch memory size per thread, we need to check
+    // the device architecure generation. According to AOT_OFFLOADARCHS we may
+    // assume that AMDGPU offload archs are prefixed with "gfx" and suffixed
+    // with a two char arch specialization. In-between is the 1-2 char
+    // generation number we want to extract.
+    std::string CUKind{ComputeUnitKind};
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mhalk wrote:

Yes we only want the major version, so 9 for `gfx90a` or 10 for `gfx1030`.
It is pretty complicated for what it actually does. With the C++ tools I was aware of, I wanted to make sure I do not produce garbage.
Thank you very much!

https://github.com/llvm/llvm-project/pull/74080