[llvm] [NVPTX] Improve device function byval parameter lowering (PR #129188)

[Akshay Deodhar via llvm-commits]

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@@ -2688,29 +2688,14 @@ def DeclareScalarRegInst :
             ".reg .b$size param$a;",
             [(DeclareScalarParam (i32 imm:$a), (i32 imm:$size), (i32 1))]>;
 
-class MoveParamInst<ValueType T, NVPTXRegClass regclass, string asmstr> :
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akshayrdeodhar wrote:

Do we envision no other cases where the backend will produce "mov src, dst"?  (loadparamreginst is different). Otherwise we might want to keep the definition (but not the pattern) around.

https://github.com/llvm/llvm-project/pull/129188