[llvm] [DebugInfo][NaryReassociate] Fix missing debug location updates (PR #92545)

[Orlando Cazalet-Hyams via llvm-commits]

================
@@ -512,9 +512,11 @@ Instruction *NaryReassociatePass::tryReassociatedBinaryOp(const SCEV *LHSExpr,
   switch (I->getOpcode()) {
   case Instruction::Add:
     NewI = BinaryOperator::CreateAdd(LHS, RHS, "", I->getIterator());
+    NewI->setDebugLoc(I->getDebugLoc());
     break;
   case Instruction::Mul:
     NewI = BinaryOperator::CreateMul(LHS, RHS, "", I->getIterator());
+    NewI->setDebugLoc(I->getDebugLoc());
----------------
OCHyams wrote:

style nit: we could sink this out the switch. I'll leave it up to you.

https://github.com/llvm/llvm-project/pull/92545