diff --git a/utils/TableGen/ClangAttrEmitter.cpp b/utils/TableGen/ClangAttrEmitter.cpp
index ef1ad3e..6812ee7 100644
--- a/utils/TableGen/ClangAttrEmitter.cpp
+++ b/utils/TableGen/ClangAttrEmitter.cpp
@@ -33,7 +33,7 @@
        i != e;
        ++i) {
     assert(*i && "Got a null element in a ListInit");
-    if (StringInit *S = dynamic_cast<StringInit *>(*i))
+    if (StringInit *S = dyn_cast<StringInit>(*i))
       Strings.push_back(S->getValue());
     else
       assert(false && "Got a non-string, non-code element in a ListInit");
diff --git a/utils/TableGen/ClangDiagnosticsEmitter.cpp b/utils/TableGen/ClangDiagnosticsEmitter.cpp
index 8615d2d..6cf15ac 100644
--- a/utils/TableGen/ClangDiagnosticsEmitter.cpp
+++ b/utils/TableGen/ClangDiagnosticsEmitter.cpp
@@ -75,7 +75,7 @@
 static std::string getDiagnosticCategory(const Record *R,
                                          DiagGroupParentMap &DiagGroupParents) {
   // If the diagnostic is in a group, and that group has a category, use it.
-  if (DefInit *Group = dynamic_cast<DefInit*>(R->getValueInit("Group"))) {
+  if (DefInit *Group = dyn_cast<DefInit>(R->getValueInit("Group"))) {
     // Check the diagnostic's diag group for a category.
     std::string CatName = getCategoryFromDiagGroup(Group->getDef(),
                                                    DiagGroupParents);
@@ -136,7 +136,7 @@
                              std::map<std::string, GroupInfo> &DiagsInGroup) {
   for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
     const Record *R = Diags[i];
-    DefInit *DI = dynamic_cast<DefInit*>(R->getValueInit("Group"));
+    DefInit *DI = dyn_cast<DefInit>(R->getValueInit("Group"));
     if (DI == 0) continue;
     assert(R->getValueAsDef("Class")->getName() != "CLASS_NOTE" &&
            "Note can't be in a DiagGroup");
@@ -280,7 +280,7 @@
     Record *R = Diags[i];
     if (isExtension(R) && isOffByDefault(R)) {
       DiagsSet.insert(R);
-      if (DefInit *Group = dynamic_cast<DefInit*>(R->getValueInit("Group"))) {
+      if (DefInit *Group = dyn_cast<DefInit>(R->getValueInit("Group"))) {
         const Record *GroupRec = Group->getDef();
         if (!isSubGroupOfGroup(GroupRec, "pedantic")) {
           markGroup(GroupRec);
@@ -299,7 +299,7 @@
     // Check if the group is implicitly in -Wpedantic.  If so,
     // the diagnostic should not be directly included in the -Wpedantic
     // diagnostic group.
-    if (DefInit *Group = dynamic_cast<DefInit*>(R->getValueInit("Group")))
+    if (DefInit *Group = dyn_cast<DefInit>(R->getValueInit("Group")))
       if (groupInPedantic(Group->getDef()))
         continue;
 
@@ -391,7 +391,7 @@
     // Check if this is an error that is accidentally in a warning
     // group.
     if (isError(R)) {
-      if (DefInit *Group = dynamic_cast<DefInit*>(R.getValueInit("Group"))) {
+      if (DefInit *Group = dyn_cast<DefInit>(R.getValueInit("Group"))) {
         const Record *GroupRec = Group->getDef();
         const std::string &GroupName = GroupRec->getValueAsString("GroupName");
         throw "Error " + R.getName() + " cannot be in a warning group [" +
@@ -413,7 +413,7 @@
     
     // Warning associated with the diagnostic. This is stored as an index into
     // the alphabetically sorted warning table.
-    if (DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group"))) {
+    if (DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group"))) {
       std::map<std::string, GroupInfo>::iterator I =
           DiagsInGroup.find(DI->getDef()->getValueAsString("GroupName"));
       assert(I != DiagsInGroup.end());
diff --git a/utils/TableGen/ClangSACheckersEmitter.cpp b/utils/TableGen/ClangSACheckersEmitter.cpp
index 5a0db50..26891f8 100644
--- a/utils/TableGen/ClangSACheckersEmitter.cpp
+++ b/utils/TableGen/ClangSACheckersEmitter.cpp
@@ -28,7 +28,7 @@
   if (R.getValueAsBit("Hidden"))
     return true;
   // Not declared as hidden, check the parent package if it is hidden.
-  if (DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("ParentPackage")))
+  if (DefInit *DI = dyn_cast<DefInit>(R.getValueInit("ParentPackage")))
     return isHidden(*DI->getDef());
 
   return false;
@@ -42,7 +42,7 @@
 
 static std::string getParentPackageFullName(const Record *R) {
   std::string name;
-  if (DefInit *DI = dynamic_cast<DefInit*>(R->getValueInit("ParentPackage")))
+  if (DefInit *DI = dyn_cast<DefInit>(R->getValueInit("ParentPackage")))
     name = getPackageFullName(DI->getDef());
   return name;
 }
@@ -63,8 +63,7 @@
 }
 
 static std::string getStringValue(const Record &R, StringRef field) {
-  if (StringInit *
-        SI = dynamic_cast<StringInit*>(R.getValueInit(field)))
+  if (StringInit *SI = dyn_cast<StringInit>(R.getValueInit(field)))
     return SI->getValue();
   return std::string();
 }
@@ -131,7 +130,7 @@
     Record *R = checkers[i];
     Record *package = 0;
     if (DefInit *
-          DI = dynamic_cast<DefInit*>(R->getValueInit("ParentPackage")))
+          DI = dyn_cast<DefInit>(R->getValueInit("ParentPackage")))
       package = DI->getDef();
     if (!isCheckerNamed(R) && !package)
       throw "Checker '" + R->getName() + "' is neither named, nor in a package!";
@@ -151,20 +150,20 @@
     // Insert the checker and its parent packages into the subgroups set of
     // the corresponding parent package.
     while (DefInit *DI
-             = dynamic_cast<DefInit*>(currR->getValueInit("ParentPackage"))) {
+             = dyn_cast<DefInit>(currR->getValueInit("ParentPackage"))) {
       Record *parentPackage = DI->getDef();
       recordGroupMap[parentPackage]->SubGroups.insert(currR);
       currR = parentPackage;
     }
     // Insert the checker into the set of its group.
-    if (DefInit *DI = dynamic_cast<DefInit*>(R->getValueInit("Group")))
+    if (DefInit *DI = dyn_cast<DefInit>(R->getValueInit("Group")))
       recordGroupMap[DI->getDef()]->Checkers.insert(R);
   }
 
   // If a package is in group, add all its checkers and its sub-packages
   // checkers into the group.
   for (unsigned i = 0, e = packages.size(); i != e; ++i)
-    if (DefInit *DI = dynamic_cast<DefInit*>(packages[i]->getValueInit("Group")))
+    if (DefInit *DI = dyn_cast<DefInit>(packages[i]->getValueInit("Group")))
       addPackageToCheckerGroup(packages[i], DI->getDef(), recordGroupMap);
 
   typedef std::map<std::string, const Record *> SortedRecords;
@@ -205,7 +204,7 @@
       OS << "PACKAGE(" << "\"";
       OS.write_escaped(getPackageFullName(&R)) << "\", ";
       // Group index
-      if (DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group")))
+      if (DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group")))
         OS << groupToSortIndex[DI->getDef()] << ", ";
       else
         OS << "-1, ";
@@ -233,7 +232,7 @@
     OS << "\"";
     OS.write_escaped(getStringValue(R, "HelpText")) << "\", ";
     // Group index
-    if (DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group")))
+    if (DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group")))
       OS << groupToSortIndex[DI->getDef()] << ", ";
     else
       OS << "-1, ";
diff --git a/utils/TableGen/OptParserEmitter.cpp b/utils/TableGen/OptParserEmitter.cpp
index c9492ad..9b4bc29 100644
--- a/utils/TableGen/OptParserEmitter.cpp
+++ b/utils/TableGen/OptParserEmitter.cpp
@@ -56,7 +56,7 @@
 
 static const std::string getOptionName(const Record &R) {
   // Use the record name unless EnumName is defined.
-  if (dynamic_cast<UnsetInit*>(R.getValueInit("EnumName")))
+  if (isa<UnsetInit>(R.getValueInit("EnumName")))
     return R.getName();
 
   return R.getValueAsString("EnumName");
@@ -109,7 +109,7 @@
 
       // The containing option group (if any).
       OS << ", ";
-      if (const DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group")))
+      if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group")))
         OS << getOptionName(*DI->getDef());
       else
         OS << "INVALID";
@@ -118,7 +118,7 @@
       OS << ", INVALID, 0, 0";
 
       // The option help text.
-      if (!dynamic_cast<UnsetInit*>(R.getValueInit("HelpText"))) {
+      if (!isa<UnsetInit>(R.getValueInit("HelpText"))) {
         OS << ",\n";
         OS << "       ";
         write_cstring(OS, R.getValueAsString("HelpText"));
@@ -149,14 +149,14 @@
 
       // The containing option group (if any).
       OS << ", ";
-      if (const DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group")))
+      if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group")))
         OS << getOptionName(*DI->getDef());
       else
         OS << "INVALID";
 
       // The option alias (if any).
       OS << ", ";
-      if (const DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Alias")))
+      if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Alias")))
         OS << getOptionName(*DI->getDef());
       else
         OS << "INVALID";
@@ -170,7 +170,7 @@
         for (unsigned i = 0, e = LI->size(); i != e; ++i) {
           if (i)
             OS << " | ";
-          OS << dynamic_cast<DefInit*>(LI->getElement(i))->getDef()->getName();
+          OS << cast<DefInit>(LI->getElement(i))->getDef()->getName();
         }
       }
 
@@ -178,7 +178,7 @@
       OS << ", " << R.getValueAsInt("NumArgs");
 
       // The option help text.
-      if (!dynamic_cast<UnsetInit*>(R.getValueInit("HelpText"))) {
+      if (!isa<UnsetInit>(R.getValueInit("HelpText"))) {
         OS << ",\n";
         OS << "       ";
         write_cstring(OS, R.getValueAsString("HelpText"));
@@ -187,7 +187,7 @@
 
       // The option meta-variable name.
       OS << ", ";
-      if (!dynamic_cast<UnsetInit*>(R.getValueInit("MetaVarName")))
+      if (!isa<UnsetInit>(R.getValueInit("MetaVarName")))
         write_cstring(OS, R.getValueAsString("MetaVarName"));
       else
         OS << "0";