[llvm] Merge sourcelocation in CSEMIRBuilder::getDominatingInstrForID. (PR #90922)

[Matt Arsenault via llvm-commits]

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@@ -856,8 +856,9 @@ class MachineIRBuilder {
   ///      type.
   ///
   /// \return The newly created instruction.
-  virtual MachineInstrBuilder buildConstant(const DstOp &Res,
-                                            const ConstantInt &Val);
+  virtual MachineInstrBuilder
+  buildConstant(const DstOp &Res, const ConstantInt &Val,
+                SmallVectorImpl<DILocation *> *Locs = nullptr);
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arsenm wrote:

Do we really have to pollute the public API with this? Can't this remain an internal implementation detail? 

https://github.com/llvm/llvm-project/pull/90922