Ensure types used as std::vector elements are complete.

These were never allowed, but with C++20 making more `vector` functions
`constexpr`, they would start causing build failures in that language
mode.

Author: allevato

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/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.