[llvm] [InlineAsm] wrap ConstraintCode in enum class NFC (PR #66003)

[James Y Knight via llvm-commits]

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@@ -89,9 +89,10 @@ class SelectionDAGISel : public MachineFunctionPass {
   /// not match or is not implemented, return true.  The resultant operands
   /// (which will appear in the machine instruction) should be added to the
   /// OutOps vector.
-  virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
-                                            unsigned ConstraintID,
-                                            std::vector<SDValue> &OutOps) {
+  virtual bool
+  SelectInlineAsmMemoryOperand(const SDValue &Op,
+                               const InlineAsm::ConstraintCode ConstraintID,
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jyknight wrote:

Nit: it's weird to mark this parameter itself as const. Not _wrong_ per se, but it's an unusual style, so I think it'd be better to avoid (here and elsewhere).

https://github.com/llvm/llvm-project/pull/66003