[clang] [llvm] [NVPTX] Support __usAtomicCAS builtin (PR #99646)

[Artem Belevich via cfe-commits]

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@@ -0,0 +1,37 @@
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_32 | FileCheck %s --check-prefixes=SM30,CHECK
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Artem-B wrote:

This test should be suitable for automatic check generation -- we probably do want to see the details of what we're doing when we do 32-bit CAS on 16-bit data.


https://github.com/llvm/llvm-project/pull/99646