[Code Health] Improve eventual C++20 support.

include/swift/Driver/Compilation.h

@@ -89,6 +89,11 @@ class Compilation {
     /// This data is used for cross-module module dependencies.
     fine_grained_dependencies::ModuleDepGraph depGraph;
 
+    Result(bool hadAbnormalExit, int exitCode,
+           fine_grained_dependencies::ModuleDepGraph depGraph)
+        : hadAbnormalExit(hadAbnormalExit), exitCode(exitCode),
+          depGraph(depGraph) {}
+
     Result(const Result &) = delete;
     Result &operator=(const Result &) = delete;
 

include/swift/IRGen/Linking.h

@@ -680,7 +680,7 @@ class LinkEntity {
     Data = LINKENTITY_SET_FIELD(Kind, unsigned(kind));
   }
 
-  LinkEntity() = default;
+  LinkEntity() : Pointer(nullptr), SecondaryPointer(nullptr), Data(0) {}
 
   static bool isValidResilientMethodRef(SILDeclRef declRef) {
     if (declRef.isForeign)

include/swift/SILOptimizer/PassManager/PassPipeline.h

@@ -33,7 +33,28 @@
 namespace swift {
 
 class SILPassPipelinePlan;
-struct SILPassPipeline;
+
+struct SILPassPipeline final {
+  unsigned ID;
+  StringRef Name;
+  unsigned KindOffset;
+  bool isFunctionPassPipeline;
+
+  friend bool operator==(const SILPassPipeline &lhs,
+                         const SILPassPipeline &rhs) {
+    return lhs.ID == rhs.ID && lhs.Name.equals(rhs.Name) &&
+           lhs.KindOffset == rhs.KindOffset;
+  }
+
+  friend bool operator!=(const SILPassPipeline &lhs,
+                         const SILPassPipeline &rhs) {
+    return !(lhs == rhs);
+  }
+
+  friend llvm::hash_code hash_value(const SILPassPipeline &pipeline) {
+    return llvm::hash_combine(pipeline.ID, pipeline.Name, pipeline.KindOffset);
+  }
+};
 
 enum class PassPipelineKind {
 #define PASSPIPELINE(NAME, DESCRIPTION) NAME,
@@ -123,28 +144,6 @@ class SILPassPipelinePlan final {
   }
 };
 
-struct SILPassPipeline final {
-  unsigned ID;
-  StringRef Name;
-  unsigned KindOffset;
-  bool isFunctionPassPipeline;
-
-  friend bool operator==(const SILPassPipeline &lhs,
-                         const SILPassPipeline &rhs) {
-    return lhs.ID == rhs.ID && lhs.Name.equals(rhs.Name) &&
-           lhs.KindOffset == rhs.KindOffset;
-  }
-
-  friend bool operator!=(const SILPassPipeline &lhs,
-                         const SILPassPipeline &rhs) {
-    return !(lhs == rhs);
-  }
-
-  friend llvm::hash_code hash_value(const SILPassPipeline &pipeline) {
-    return llvm::hash_combine(pipeline.ID, pipeline.Name, pipeline.KindOffset);
-  }
-};
-
 inline void SILPassPipelinePlan::
 startPipeline(StringRef Name, bool isFunctionPassPipeline) {
   PipelineStages.push_back(SILPassPipeline{

lib/AST/CASTBridging.cpp

@@ -20,6 +20,10 @@ struct BridgedDiagnosticImpl {
   InFlightDiagnostic inFlight;
   std::vector<StringRef> textBlobs;
 
+  BridgedDiagnosticImpl(InFlightDiagnostic inFlight,
+                        std::vector<StringRef> textBlobs)
+      : inFlight(std::move(inFlight)), textBlobs(std::move(textBlobs)) {}
+
   BridgedDiagnosticImpl(const BridgedDiagnosticImpl &) = delete;
   BridgedDiagnosticImpl(BridgedDiagnosticImpl &&) = delete;
   BridgedDiagnosticImpl &operator=(const BridgedDiagnosticImpl &) = delete;

lib/Frontend/DependencyVerifier.cpp

@@ -148,6 +148,9 @@ struct Obligation {
   public:
     Key() = delete;
 
+  private:
+    Key(StringRef Name, Expectation::Kind Kind) : Name(Name), Kind(Kind) {}
+
   public:
     static Key forNegative(StringRef name) {
       return Key{name, Expectation::Kind::Negative};

lib/IRGen/Outlining.h

@@ -17,6 +17,7 @@
 #ifndef SWIFT_IRGEN_OUTLINING_H
 #define SWIFT_IRGEN_OUTLINING_H
 
+#include "LocalTypeDataKind.h"
 #include "swift/Basic/LLVM.h"
 #include "llvm/ADT/MapVector.h"
 
@@ -37,7 +38,6 @@ class Address;
 class Explosion;
 class IRGenFunction;
 class IRGenModule;
-class LocalTypeDataKey;
 class TypeInfo;
 
 /// A helper class for emitting outlined value operations.