[TableGen] Use llvm::append_range (NFC)

Author: kazutakahirata

llvm/utils/TableGen/CodeGenRegisters.cpp

@@ -496,11 +496,10 @@ void CodeGenRegister::computeSecondarySubRegs(CodeGenRegBank &RegBank) {
       assert(getSubRegIndex(SubReg) == SubRegIdx && "LeadingSuperRegs correct");
       for (CodeGenRegister *SubReg : Cand->ExplicitSubRegs) {
         if (CodeGenSubRegIndex *SubRegIdx = getSubRegIndex(SubReg)) {
-          if (SubRegIdx->ConcatenationOf.empty()) {
+          if (SubRegIdx->ConcatenationOf.empty())
             Parts.push_back(SubRegIdx);
-          } else
-            for (CodeGenSubRegIndex *SubIdx : SubRegIdx->ConcatenationOf)
-              Parts.push_back(SubIdx);
+          else
+            append_range(Parts, SubRegIdx->ConcatenationOf);
         } else {
           // Sub-register doesn't exist.
           Parts.clear();

llvm/utils/TableGen/CodeGenSchedule.cpp

@@ -1208,11 +1208,10 @@ void CodeGenSchedModels::collectProcItinRW() {
 
 // Gather the unsupported features for processor models.
 void CodeGenSchedModels::collectProcUnsupportedFeatures() {
-  for (CodeGenProcModel &ProcModel : ProcModels) {
-    for (Record *Pred : ProcModel.ModelDef->getValueAsListOfDefs("UnsupportedFeatures")) {
-       ProcModel.UnsupportedFeaturesDefs.push_back(Pred);
-    }
-  }
+  for (CodeGenProcModel &ProcModel : ProcModels)
+    append_range(
+        ProcModel.UnsupportedFeaturesDefs,
+        ProcModel.ModelDef->getValueAsListOfDefs("UnsupportedFeatures"));
 }
 
 /// Infer new classes from existing classes. In the process, this may create new

llvm/utils/TableGen/GlobalISel/GIMatchTree.cpp

@@ -454,8 +454,7 @@ void GIMatchTreeOpcodePartitioner::repartition(
         // predicates for one instruction in the same DAG. That should be
         // impossible.
         assert(AllOpcodes && "Conflicting opcode predicates");
-        for (const CodeGenInstruction *Expected : OpcodeP->getInstrs())
-          OpcodesForThisPredicate.push_back(Expected);
+        append_range(OpcodesForThisPredicate, OpcodeP->getInstrs());
       }
 
       for (const CodeGenInstruction *Expected : OpcodesForThisPredicate) {

llvm/utils/TableGen/GlobalISelEmitter.cpp

@@ -5431,8 +5431,7 @@ std::vector<Matcher *> GlobalISelEmitter::optimizeRules(
     // added rules out of it and make sure to re-create the group to properly
     // re-initialize it:
     if (CurrentGroup->size() < 2)
-      for (Matcher *M : CurrentGroup->matchers())
-        OptRules.push_back(M);
+      append_range(OptRules, CurrentGroup->matchers());
     else {
       CurrentGroup->finalize();
       OptRules.push_back(CurrentGroup.get());
@@ -5691,8 +5690,7 @@ void GlobalISelEmitter::run(raw_ostream &OS) {
   // Emit a table containing the LLT objects needed by the matcher and an enum
   // for the matcher to reference them with.
   std::vector<LLTCodeGen> TypeObjects;
-  for (const auto &Ty : KnownTypes)
-    TypeObjects.push_back(Ty);
+  append_range(TypeObjects, KnownTypes);
   llvm::sort(TypeObjects);
   OS << "// LLT Objects.\n"
      << "enum {\n";