Update unreachable control path annotations

include/swift/AST/GenericSignatureBuilder.h

@@ -32,6 +32,7 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/TinyPtrVector.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/TrailingObjects.h"
 #include <functional>
 #include <memory>
@@ -590,6 +591,8 @@ class GenericSignatureBuilder::RequirementSource final
     case Concrete:
       return 0;
     }
+
+    llvm_unreachable("Unhandled RequirementSourceKind in switch.");
   }
 
   /// Determines whether we have been provided with an acceptable storage kind
@@ -618,6 +621,8 @@ class GenericSignatureBuilder::RequirementSource final
     case Concrete:
       return false;
     }
+
+    llvm_unreachable("Unhandled RequirementSourceKind in switch.");
   }
 
 public:

include/swift/AST/Requirement.h

@@ -19,6 +19,7 @@
 
 #include "swift/AST/Type.h"
 #include "llvm/ADT/PointerIntPair.h"
+#include "llvm/Support/ErrorHandling.h"
 
 namespace swift {
 
@@ -109,6 +110,8 @@ class Requirement {
     case RequirementKind::Layout:
       return Requirement(getKind(), newFirst, getLayoutConstraint());
     }
+
+    llvm_unreachable("Unhandled RequirementKind in switch.");
   }
 
   /// \brief Retrieve the layout constraint.

lib/AST/ASTDumper.cpp

@@ -29,6 +29,7 @@
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Process.h"
 #include "llvm/Support/SaveAndRestore.h"
 #include "llvm/Support/raw_ostream.h"
@@ -207,6 +208,8 @@ getSILFunctionTypeRepresentationString(SILFunctionType::Representation value) {
   case SILFunctionType::Representation::WitnessMethod: return "witness_method";
   case SILFunctionType::Representation::Closure: return "closure";
   }
+
+  llvm_unreachable("Unhandled SILFunctionTypeRepresentation in switch.");
 }
 static StringRef
 getAbstractStorageDeclKindString(AbstractStorageDecl::StorageKindTy value) {
@@ -230,6 +233,8 @@ getAbstractStorageDeclKindString(AbstractStorageDecl::StorageKindTy value) {
   case AbstractStorageDecl::Computed:
     return "computed";
   }
+
+  llvm_unreachable("Unhandled AbstractStorageDecl in switch.");
 }
 static StringRef getImportKindString(ImportKind value) {
   switch (value) {
@@ -242,6 +247,8 @@ static StringRef getImportKindString(ImportKind value) {
   case ImportKind::Var: return "var";
   case ImportKind::Func: return "func";
   }
+
+  llvm_unreachable("Unhandled ImportKind in switch.");
 }
 static StringRef getAccessibilityString(Accessibility value) {
   switch (value) {
@@ -251,6 +258,8 @@ static StringRef getAccessibilityString(Accessibility value) {
   case Accessibility::Public: return "public";
   case Accessibility::Open: return "open";
   }
+
+  llvm_unreachable("Unhandled Accessibility in switch.");
 }
 static StringRef
 getForeignErrorConventionKindString(ForeignErrorConvention::Kind value) {
@@ -261,6 +270,8 @@ getForeignErrorConventionKindString(ForeignErrorConvention::Kind value) {
   case ForeignErrorConvention::NilResult: return "NilResult";
   case ForeignErrorConvention::NonNilError: return "NonNilError";
   }
+
+  llvm_unreachable("Unhandled ForeignErrorConvention in switch.");
 }
 static StringRef getDefaultArgumentKindString(DefaultArgumentKind value) {
   switch (value) {
@@ -276,6 +287,8 @@ static StringRef getDefaultArgumentKindString(DefaultArgumentKind value) {
     case DefaultArgumentKind::EmptyDictionary: return "[:]";
     case DefaultArgumentKind::Normal: return "normal";
   }
+
+  llvm_unreachable("Unhandled DefaultArgumentKind in switch.");
 }
 static StringRef getAccessorKindString(AccessorKind value) {
   switch (value) {
@@ -288,13 +301,17 @@ static StringRef getAccessorKindString(AccessorKind value) {
     case AccessorKind::IsAddressor: return "addressor";
     case AccessorKind::IsMutableAddressor: return "mutableAddressor";
   }
+
+  llvm_unreachable("Unhandled AccessorKind in switch.");
 }
 static StringRef getAccessKindString(AccessKind value) {
   switch (value) {
     case AccessKind::Read: return "read";
     case AccessKind::Write: return "write";
     case AccessKind::ReadWrite: return "readwrite";
   }
+
+  llvm_unreachable("Unhandled AccessKind in switch.");
 }
 static StringRef
 getMagicIdentifierLiteralExprKindString(MagicIdentifierLiteralExpr::Kind value) {
@@ -305,6 +322,8 @@ getMagicIdentifierLiteralExprKindString(MagicIdentifierLiteralExpr::Kind value)
     case MagicIdentifierLiteralExpr::Column: return "#column";
     case MagicIdentifierLiteralExpr::DSOHandle: return "#dsohandle";
   }
+
+  llvm_unreachable("Unhandled MagicIdentifierLiteralExpr in switch.");
 }
 static StringRef
 getObjCSelectorExprKindString(ObjCSelectorExpr::ObjCSelectorKind value) {
@@ -313,6 +332,8 @@ getObjCSelectorExprKindString(ObjCSelectorExpr::ObjCSelectorKind value) {
     case ObjCSelectorExpr::Getter: return "getter";
     case ObjCSelectorExpr::Setter: return "setter";
   }
+
+  llvm_unreachable("Unhandled ObjCSelectorExpr in switch.");
 }
 static StringRef getAccessSemanticsString(AccessSemantics value) {
   switch (value) {
@@ -321,13 +342,17 @@ static StringRef getAccessSemanticsString(AccessSemantics value) {
     case AccessSemantics::DirectToAccessor: return "direct_to_accessor";
     case AccessSemantics::BehaviorInitialization: return "behavior_init";
   }
+
+  llvm_unreachable("Unhandled AccessSemantics in switch.");
 }
 static StringRef getMetatypeRepresentationString(MetatypeRepresentation value) {
   switch (value) {
     case MetatypeRepresentation::Thin: return "thin";
     case MetatypeRepresentation::Thick: return "thick";
     case MetatypeRepresentation::ObjC: return "@objc";
   }
+
+  llvm_unreachable("Unhandled MetatypeRepresentation in switch.");
 }
 static StringRef
 getStringLiteralExprEncodingString(StringLiteralExpr::Encoding value) {
@@ -336,6 +361,8 @@ getStringLiteralExprEncodingString(StringLiteralExpr::Encoding value) {
     case StringLiteralExpr::UTF16: return "utf16";
     case StringLiteralExpr::OneUnicodeScalar: return "unicodeScalar";
   }
+
+  llvm_unreachable("Unhandled StringLiteral in switch.");
 }
 static StringRef getCtorInitializerKindString(CtorInitializerKind value) {
   switch (value) {
@@ -344,20 +371,26 @@ static StringRef getCtorInitializerKindString(CtorInitializerKind value) {
     case CtorInitializerKind::ConvenienceFactory: return "convenience_factory";
     case CtorInitializerKind::Factory: return "factory";
   }
+
+  llvm_unreachable("Unhandled CtorInitializerKind in switch.");
 }
 static StringRef getOptionalTypeKindString(OptionalTypeKind value) {
   switch (value) {
     case OTK_None: return "none";
     case OTK_Optional: return "Optional";
     case OTK_ImplicitlyUnwrappedOptional: return "ImplicitlyUnwrappedOptional";
   }
+
+  llvm_unreachable("Unhandled OptionalTypeKind in switch.");
 }
 static StringRef getAssociativityString(Associativity value) {
   switch (value) {
     case Associativity::None: return "none";
     case Associativity::Left: return "left";
     case Associativity::Right: return "right";
   }
+
+  llvm_unreachable("Unhandled Associativity in switch.");
 }
 
 //===----------------------------------------------------------------------===//

lib/AST/GenericSignatureBuilder.cpp

@@ -160,6 +160,8 @@ bool RequirementSource::isAcceptableStorageKind(Kind kind,
       return false;
     }
   }
+
+  llvm_unreachable("Unhandled RequirementSourceKind in switch.");
 }
 
 const void *RequirementSource::getOpaqueStorage() const {
@@ -182,6 +184,8 @@ const void *RequirementSource::getOpaqueStorage() const {
   case StorageKind::AssociatedTypeDecl:
     return storage.assocType;
   }
+
+  llvm_unreachable("Unhandled StorageKind in switch.");
 }
 
 const void *RequirementSource::getExtraOpaqueStorage() const {
@@ -210,6 +214,8 @@ bool RequirementSource::isDerivedRequirement() const {
     // need to keep them for the requirement signature.
     return parent->kind != RequirementSignatureSelf;
   }
+
+  llvm_unreachable("Unhandled RequirementSourceKind in switch.");
 }
 
 bool RequirementSource::isDerivedViaConcreteConformance() const {
@@ -418,6 +424,8 @@ ProtocolDecl *RequirementSource::getProtocolDecl() const {
   case StorageKind::AssociatedTypeDecl:
     return storage.assocType->getProtocol();
   }
+
+  llvm_unreachable("Unhandled StorageKind in switch.");
 }
 
 SourceLoc RequirementSource::getLoc() const {
@@ -569,6 +577,8 @@ const RequirementSource *FloatingRequirementSource::getSource(
   case Inferred:
     return RequirementSource::forInferred(pa, storage.get<const TypeRepr *>());
   }
+
+  llvm_unreachable("Unhandled FloatingPointRequirementSourceKind in switch.");
 }
 
 SourceLoc FloatingRequirementSource::getLoc() const {

lib/ClangImporter/ImportName.cpp

@@ -37,6 +37,7 @@
 #include "clang/Sema/Lookup.h"
 #include "clang/Sema/Sema.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/ErrorHandling.h"
 #include <algorithm>
 #include <memory>
 
@@ -79,6 +80,8 @@ unsigned importer::majorVersionNumberForNameVersion(ImportNameVersion version) {
   case ImportNameVersion::Swift4:
     return 4;
   }
+
+  llvm_unreachable("Unhandled ImportNameVersion in switch.");
 }
 
 

lib/Sema/TypeCheckGeneric.cpp

@@ -20,6 +20,7 @@
 #include "swift/AST/GenericEnvironment.h"
 #include "swift/AST/Types.h"
 #include "swift/Basic/Defer.h"
+#include "llvm/Support/ErrorHandling.h"
 
 using namespace swift;
 
@@ -399,6 +400,8 @@ bool TypeChecker::validateRequirement(SourceLoc whereLoc, RequirementRepr &req,
     return false;
   }
   }
+
+  llvm_unreachable("Unhandled RequirementKind in switch.");
 }
 
 void

lib/Syntax/SyntaxData.cpp

@@ -16,6 +16,7 @@
 #include "swift/Syntax/TypeSyntax.h"
 #include "swift/Syntax/StmtSyntax.h"
 #include "swift/Syntax/UnknownSyntax.h"
+#include "llvm/Support/ErrorHandling.h"
 
 using namespace swift;
 using namespace swift::syntax;
@@ -44,6 +45,8 @@ RC<SyntaxData> SyntaxData::makeDataFromRaw(RC<RawSyntax> Raw,
   case SyntaxKind::Token:
     llvm_unreachable("Can't make a SyntaxData from a Token!");
   }
+
+  llvm_unreachable("Unhandled SyntaxKind in switch.");
 }
 
 bool SyntaxData::isType() const {