[AST] Rename "semantic members" to "ABI members".

The "semantic members" query produces the list of members that can
affect the ABI, e.g., of classes. It does not produce the complete
list of members suitable for semantic queries.

(cherry picked from commit a8f7f0d)

Author: DougGregor

include/swift/AST/Decl.h

@@ -3541,7 +3541,7 @@ class ClassDecl final : public NominalTypeDecl {
 
   friend class SuperclassDeclRequest;
   friend class SuperclassTypeRequest;
-  friend class SemanticMembersRequest;
+  friend class ABIMembersRequest;
   friend class HasMissingDesignatedInitializersRequest;
   friend class InheritsSuperclassInitializersRequest;
 

include/swift/AST/DeclContext.h

@@ -778,10 +778,11 @@ class IterableDeclContext {
   /// the implementation.
   ArrayRef<Decl *> getParsedMembers() const;
 
-  /// Get all the members that are semantically within this context,
-  /// including any implicitly-synthesized members.
+  /// Get all of the members within this context that can affect ABI, including
+  /// any implicitly-synthesized members.
+  ///
   /// The resulting list of members will be stable across translation units.
-  ArrayRef<Decl *> getSemanticMembers() const;
+  ArrayRef<Decl *> getABIMembers() const;
 
   /// Retrieve the set of members in this context without loading any from the
   /// associated lazy loader; this should only be used as part of implementing

include/swift/AST/TypeCheckRequests.h

@@ -1221,8 +1221,8 @@ class SynthesizeAccessorRequest :
   void cacheResult(AccessorDecl *value) const;
 };
 
-class SemanticMembersRequest :
-    public SimpleRequest<SemanticMembersRequest,
+class ABIMembersRequest :
+    public SimpleRequest<ABIMembersRequest,
                          ArrayRef<Decl *>(IterableDeclContext *),
                          RequestFlags::Cached> {
 public:

include/swift/AST/TypeCheckerTypeIDZone.def

@@ -65,7 +65,7 @@ SWIFT_REQUEST(TypeChecker, TypeEraserHasViableInitRequest,
 SWIFT_REQUEST(TypeChecker, DynamicallyReplacedDeclRequest,
               ValueDecl *(ValueDecl *),
               Cached, NoLocationInfo)
-SWIFT_REQUEST(TypeChecker, SemanticMembersRequest,
+SWIFT_REQUEST(TypeChecker, ABIMembersRequest,
               ArrayRef<Decl *>(IterableDeclContext *), Cached, NoLocationInfo)
 SWIFT_REQUEST(TypeChecker, SpecializeAttrTargetDeclRequest,
               ValueDecl *(const ValueDecl *, SpecializeAttr *),

include/swift/SIL/SILVTableVisitor.h

@@ -148,7 +148,7 @@ template <class T> class SILVTableVisitor {
     if (!theClass->hasKnownSwiftImplementation())
       return;
 
-    for (auto member : theClass->getSemanticMembers())
+    for (auto member : theClass->getABIMembers())
       maybeAddMember(member);
   }
 };

lib/AST/DeclContext.cpp

@@ -758,11 +758,11 @@ ArrayRef<Decl *> IterableDeclContext::getParsedMembers() const {
     .members;
 }
 
-ArrayRef<Decl *> IterableDeclContext::getSemanticMembers() const {
+ArrayRef<Decl *> IterableDeclContext::getABIMembers() const {
   ASTContext &ctx = getASTContext();
   return evaluateOrDefault(
       ctx.evaluator,
-      SemanticMembersRequest{const_cast<IterableDeclContext *>(this)},
+      ABIMembersRequest{const_cast<IterableDeclContext *>(this)},
       ArrayRef<Decl *>());
 }
 

lib/SILGen/SILGenType.cpp

@@ -1038,7 +1038,7 @@ class SILGenType : public TypeMemberVisitor<SILGenType> {
 
     // Build a vtable if this is a class.
     if (auto theClass = dyn_cast<ClassDecl>(theType)) {
-      for (Decl *member : theClass->getSemanticMembers())
+      for (Decl *member : theClass->getABIMembers())
         visit(member);
 
       SILGenVTable genVTable(SGM, theClass);

lib/Sema/TypeCheckDecl.cpp

@@ -2551,8 +2551,8 @@ struct SortedDeclList {
 } // end namespace
 
 ArrayRef<Decl *>
-SemanticMembersRequest::evaluate(Evaluator &evaluator,
-                                IterableDeclContext *idc) const {
+ABIMembersRequest::evaluate(
+    Evaluator &evaluator, IterableDeclContext *idc) const {
   auto dc = cast<DeclContext>(idc->getDecl());
   auto &Context = dc->getASTContext();
   SmallVector<Decl *, 8> result;

lib/Sema/TypeCheckDeclPrimary.cpp

@@ -2129,7 +2129,7 @@ class DeclChecker : public DeclVisitor<DeclChecker> {
 
     TypeChecker::checkDeclAttributes(CD);
 
-    for (Decl *Member : CD->getSemanticMembers())
+    for (Decl *Member : CD->getABIMembers())
       visit(Member);
 
     TypeChecker::checkPatternBindingCaptures(CD);

lib/Sema/TypeCheckProtocol.cpp

@@ -4641,7 +4641,7 @@ ConformanceChecker::getObjCRequirements(ObjCMethodKey key) {
 
   // Fill in the data structure if we haven't done so yet.
   if (!computedObjCMethodRequirements) {
-    for (auto requirement : proto->getSemanticMembers()) {
+    for (auto requirement : proto->getABIMembers()) {
       auto funcRequirement = dyn_cast<AbstractFunctionDecl>(requirement);
       if (!funcRequirement)
         continue;