[llvm] [DebugInfo][RemoveDIs] Have getInsertionPtAfterDef return an iterator (PR #73149)

[Orlando Cazalet-Hyams via llvm-commits]

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@@ -4130,7 +4130,7 @@ static bool canFreelyInvert(InstCombiner &IC, Value *Op,
 static Value *freelyInvert(InstCombinerImpl &IC, Value *Op,
                            Instruction *IgnoredUser) {
   auto *I = cast<Instruction>(Op);
-  IC.Builder.SetInsertPoint(&*I->getInsertionPointAfterDef());
+  IC.Builder.SetInsertPoint(&**I->getInsertionPointAfterDef());
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OCHyams wrote:

The leading `&*` are not needed (were not needed before your patch)? And potentially drops haedBit info, if I'm reading this right.

https://github.com/llvm/llvm-project/pull/73149