[llvm] [GlobalIsel] Combine ADDE (PR #82413)

[Amara Emerson via llvm-commits]

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@@ -6906,3 +6923,195 @@ bool CombinerHelper::matchOr(MachineInstr &MI, BuildFnTy &MatchInfo) {
 
   return false;
 }
+
+bool CombinerHelper::isZExtOrTruncLegal(LLT ToTy, LLT FromTy) const {
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aemerson wrote:

If you're calling the variants `OrBeforeLegalizer` you should also make it clear in this function's name. Sometimes we want to know even before legalization whether something is actually legal.

https://github.com/llvm/llvm-project/pull/82413