TableGen: Try to fix expensive checks failures

arsenm · arsenm · commit d2a9b87fee84 · 2020-01-27T14:42:04.000-05:00
diff --git a/llvm/utils/TableGen/CodeGenRegisters.cpp b/llvm/utils/TableGen/CodeGenRegisters.cpp
@@ -1011,7 +1011,7 @@ CodeGenRegisterClass::getMatchingSubClassWithSubRegs(
   for (auto &RC : RegClasses)
     if (SuperRegRCsBV[RC.EnumValue])
       SuperRegRCs.emplace_back(&RC);
-  llvm::sort(SuperRegRCs, SizeOrder);
+  llvm::stable_sort(SuperRegRCs, SizeOrder);
 
   assert(SuperRegRCs.front() == BiggestSuperRegRC &&
          "Biggest class wasn't first");
