[Mlir-commits] [mlir] [MLIR][NVVM] Add definition for nvvm dialect (PR #156807)

[Durgadoss R]

================
@@ -35,6 +35,47 @@ def LLVM_PointerSharedCluster : LLVM_PointerInAddressSpace<7>;
 //===----------------------------------------------------------------------===//
 
 def NVVM_Dialect : Dialect {
+  let summary = "The NVVM dialect that models NVIDIA's public ISA";
+
+  let description = [{
+  The NVVM dialect is MLIR's LLVM-IR-based, NVIDIA-specific backend dialect. It
+  models NVVM intrinsics and public ISA functionality and introduces NVIDIA
+  extensions to the LLVM type system and address spaces (e.g., global, shared,
+  and cluster memory), enabling faithful lowering of GPU kernels to the NVPTX
+  toolchain. While a NVVM op maps to a single LLVM IR intrinsics, the NVVM dialect uses type
+  polymorphism and other attributes that make it so that a NVVM op can map to different LLVM 
+  intrinsics.
----------------
durga4github wrote:

nit: slight wording updates:

```
While an NVVM op usually maps to a single LLVM IR intrinsic, the NVVM dialect uses type
polymorphism and other attributes so that a single NVVM op can map to different LLVM 
intrinsics.
```

https://github.com/llvm/llvm-project/pull/156807