[llvm] [NVPTX] Refactor intrinsic definitions with loops and classes to remove redundancy (NFC) (PR #139611)

[Artem Belevich via llvm-commits]

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@@ -815,12 +810,18 @@ class NVVM_TCGEN05_LDST_ACCESS_SIZE<string Shape, int Num> {
                         true : llvm_void_ty);
 }
 
+class NVVMBuiltin :
+  ClangBuiltin<!strconcat("__", !substr(NAME, !size("int_")))> {
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Artem-B wrote:

How about just `!subst("int_nvvm_", "__nvvm_", NAME)` ?

https://github.com/llvm/llvm-project/pull/139611