[llvm] [TableGen] Rework error reporting for duplicate Feature/Processor. (PR #102257)

[Rahul Joshi via llvm-commits]

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@@ -250,34 +250,37 @@ void SubtargetEmitter::EmitSubtargetInfoMacroCalls(raw_ostream &OS) {
 //
 unsigned SubtargetEmitter::FeatureKeyValues(
     raw_ostream &OS, const DenseMap<Record *, unsigned> &FeatureMap) {
-  // Gather and sort all the features
+  // Gather and sort all the features.
   std::vector<Record *> FeatureList =
       Records.getAllDerivedDefinitions("SubtargetFeature");
 
-  if (FeatureList.empty())
+  // Remove features with empty name.
+  auto End = llvm::remove_if(FeatureList, [](const Record *Rec) {
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jurahul wrote:

Done.

https://github.com/llvm/llvm-project/pull/102257