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

[Sergei Barannikov via llvm-commits]

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@@ -2290,3 +2283,24 @@ void PredTransitions::dump() const {
   }
 }
 #endif // NDEBUG
+
+/// Verifies that there are no duplicate records with the same "Name" field.
+/// If there are, reports a fatal error message (and exits). Assumes that
+/// Records are sorted on the "Name" field.
+void llvm::checkDuplicateRecords(ArrayRef<Record *> Records,
+                                 StringRef ObjectName) {
+  auto I = std::adjacent_find(Records.begin(), Records.end(),
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s-barannikov wrote:

It may make sense to assert that Records are sorted.
`assert(llvm::is_sorted(Records, lambda)`

Alternatively, llvm::sort could be moved here and the function could be renamed to `sortAndReportDuplicates` or something.


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