[clang] [Clang] Make -fcomplete-member-pointers the same as using the Microsoft C++ ABI (PR #98010)

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git-clang-format --diff f50f7a7aa0b897ef91361d7dc159f3262d142bdc 0de7bd39af61eb47ee33ff991e6de18f83e005dd -- clang/include/clang/Basic/TargetCXXABI.h clang/include/clang/Sema/Sema.h clang/lib/AST/Type.cpp clang/lib/Driver/ToolChains/Clang.cpp clang/lib/Frontend/CompilerInvocation.cpp clang/lib/Sema/SemaCast.cpp clang/lib/Sema/SemaExpr.cpp clang/lib/Sema/SemaExprCXX.cpp clang/lib/Sema/SemaOverload.cpp clang/lib/Sema/SemaType.cpp clang/test/Misc/warning-wall.c clang/test/SemaCXX/complete-member-pointers.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index c6e2cb9f8b..58d6bdf705 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -14932,11 +14932,14 @@ public:
   }
 
 private:
-  void AssignInheritanceModelToBase(SourceLocation Loc, const MemberPointerType *T);
+  void AssignInheritanceModelToBase(SourceLocation Loc,
+                                    const MemberPointerType *T);
+
 public:
   /// Called when the Microsoft ABI would require the base type of a member
   /// pointer to have its inheritance model calculated.
-  void microsoftCompleteMemberPointer(SourceLocation Loc, const MemberPointerType *T) {
+  void microsoftCompleteMemberPointer(SourceLocation Loc,
+                                      const MemberPointerType *T) {
     if (getLangOpts().CompleteMemberPointers)
       AssignInheritanceModelToBase(Loc, T);
   }
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 58225fa207..a05b83b9f4 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -7146,7 +7146,8 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back("-fdelayed-template-parsing");
   }
 
-  if (Args.hasFlag(options::OPT_fcomplete_member_pointers, options::OPT_fno_complete_member_pointers, false)) {
+  if (Args.hasFlag(options::OPT_fcomplete_member_pointers,
+                   options::OPT_fno_complete_member_pointers, false)) {
     CmdArgs.push_back("-fcomplete-member-pointers");
     CmdArgs.push_back("-Werror=microsoft-incomplete-member-pointer");
   }
diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
index 3f00c7b77e..e3e81b8597 100644
--- a/clang/lib/Sema/SemaType.cpp
+++ b/clang/lib/Sema/SemaType.cpp
@@ -8969,14 +8969,18 @@ bool Sema::hasReachableDefinition(NamedDecl *D, NamedDecl **Suggested,
                                  OnlyNeedComplete);
 }
 
-void Sema::AssignInheritanceModelToBase(SourceLocation Loc, const MemberPointerType *T) {
-  if (!T || T->getClass()->isDependentType()) return;
+void Sema::AssignInheritanceModelToBase(SourceLocation Loc,
+                                        const MemberPointerType *T) {
+  if (!T || T->getClass()->isDependentType())
+    return;
 
-  assert(getLangOpts().CompleteMemberPointers && "Should not need assign the inheritance model in this case");
+  assert(getLangOpts().CompleteMemberPointers &&
+         "Should not need assign the inheritance model in this case");
 
   QualType Base = QualType(T->getClass(), 0);
   (void)isCompleteType(Loc, Base);
-  CXXRecordDecl *RD = T->getClass()->getAsCXXRecordDecl()->getMostRecentNonInjectedDecl();
+  CXXRecordDecl *RD =
+      T->getClass()->getAsCXXRecordDecl()->getMostRecentNonInjectedDecl();
   if (RD->hasAttr<MSInheritanceAttr>())
     return;
 
@@ -8999,13 +9003,14 @@ void Sema::AssignInheritanceModelToBase(SourceLocation Loc, const MemberPointerT
   }
 
   SourceRange AttrLoc = ImplicitMSInheritanceAttrLoc.isValid()
-                        ? ImplicitMSInheritanceAttrLoc
-                        : RD->getSourceRange();
+                            ? ImplicitMSInheritanceAttrLoc
+                            : RD->getSourceRange();
   RD->addAttr(MSInheritanceAttr::CreateImplicit(
       Context, BestCase, AttrLoc, MSInheritanceAttr::Spelling(IM)));
   Consumer.AssignInheritanceModel(RD);
 
-  // Don't warn if the inheritance model is explicitly unspecified because of a pragma
+  // Don't warn if the inheritance model is explicitly unspecified because of a
+  // pragma
   if (IM != MSInheritanceModel::Unspecified || !BestCase)
     return;
 
@@ -9013,8 +9018,12 @@ void Sema::AssignInheritanceModelToBase(SourceLocation Loc, const MemberPointerT
   if (!RD->hasDefinition())
     Diag(RD->getLocation(), diag::note_forward_declaration) << Base;
   else if (RD->isParsingBaseSpecifiers())
-    Diag(RD->getDefinition()->getLocation(), diag::note_memptr_incomplete_until_bases);
-  Diag(RD->getLocation(), diag::note_memptr_incomplete_specify_inheritance) << FixItHint::CreateInsertion(RD->getLocation(), "__single_inheritance|__multiple_inheritance|__virtual_inheritance");
+    Diag(RD->getDefinition()->getLocation(),
+         diag::note_memptr_incomplete_until_bases);
+  Diag(RD->getLocation(), diag::note_memptr_incomplete_specify_inheritance)
+      << FixItHint::CreateInsertion(RD->getLocation(),
+                                    "__single_inheritance|__multiple_"
+                                    "inheritance|__virtual_inheritance");
 }
 
 bool Sema::RequireCompleteTypeImpl(SourceLocation Loc, QualType T,

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https://github.com/llvm/llvm-project/pull/98010