[llvm] [NVPTX] Add Intrinsics for discard.* (PR #128404)

[Abhilash Majumder via llvm-commits]

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@@ -630,6 +630,31 @@ uses and eviction priority which can be accessed by the '``.level::eviction_prio
 For more information, refer to the PTX ISA
 `<https://docs.nvidia.com/cuda/parallel-thread-execution/#data-movement-and-conversion-instructions-prefetch-prefetchu>`_.
 
+``llvm.nvvm.discard.*``'
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+Syntax:
+"""""""
+
+.. code-block:: llvm
+
+  declare void  @llvm.nvvm.discard.global.L2(ptr addrspace(1) %global_ptr, i64 %size)
+  declare void  @llvm.nvvm.discard.L2(ptr %ptr, i64 %size)
+
+Overview:
+"""""""""
+
+The '``@llvm.nvvm.discard.*``'  invalidates the data at the address range [a .. a + (size - 1)] 
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abhilash1910 wrote:

Addressed this in the latest revision. Thanks

https://github.com/llvm/llvm-project/pull/128404