[llvm] [TableGen] Emit OpName as an enum class instead of a namespace (PR #125313)

[Jay Foad via llvm-commits]

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@@ -369,20 +369,20 @@ bool SIFoldOperandsImpl::tryFoldImmWithOpSel(FoldCandidate &Fold) const {
 
   // Refer to op_sel/op_sel_hi and check if we can change the immediate and
   // op_sel in a way that allows an inline constant.
-  int ModIdx = -1;
+  AMDGPU::OpName ModName = AMDGPU::OpName::NUM_OPERAND_NAMES;
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jayfoad wrote:

Splitting ModName from ModIdx makes a lot of sense, thanks.

https://github.com/llvm/llvm-project/pull/125313