More anonymous struct/union redesign. This one deals with anonymous field used in a constructor initializer list:

struct X {
  X() : au_i1(123) {}
  union {
    int au_i1;
    float au_f1;
  };
};

clang will now deal with au_i1 explicitly as an IndirectFieldDecl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120900 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 14 insertions, 24 deletions

diff --git a/lib/CodeGen/CGClass.cpp b/lib/CodeGen/CGClass.cpp
index ae99e03c35..e2a3f27a1d 100644
--- a/lib/CodeGen/CGClass.cpp
+++ b/lib/CodeGen/CGClass.cpp
@@ -512,21 +512,21 @@ static void EmitMemberInitializer(CodeGenFunction &CGF,
                                   CXXBaseOrMemberInitializer *MemberInit,
                                   const CXXConstructorDecl *Constructor,
                                   FunctionArgList &Args) {
-  assert(MemberInit->isMemberInitializer() &&
+  assert(MemberInit->isAnyMemberInitializer() &&
          "Must have member initializer!");
   
   // non-static data member initializers.
-  FieldDecl *Field = MemberInit->getMember();
+  FieldDecl *Field = MemberInit->getAnyMember();
   QualType FieldType = CGF.getContext().getCanonicalType(Field->getType());
 
   llvm::Value *ThisPtr = CGF.LoadCXXThis();
   LValue LHS;
   
   // If we are initializing an anonymous union field, drill down to the field.
-  if (MemberInit->getAnonUnionMember()) {
-    Field = MemberInit->getAnonUnionMember();
-    LHS = CGF.EmitLValueForAnonRecordField(ThisPtr, Field, 0);
-    FieldType = Field->getType();
+  if (MemberInit->isIndirectMemberInitializer()) {
+    LHS = CGF.EmitLValueForAnonRecordField(ThisPtr,
+                                           MemberInit->getIndirectMember(), 0);
+    FieldType = MemberInit->getIndirectMember()->getAnonField()->getType();
   } else {
     LHS = CGF.EmitLValueForFieldInitialization(ThisPtr, Field, 0);
   }
diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index 35ba2543ef..5697c5f1a4 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -1574,23 +1574,13 @@ LValue CodeGenFunction::EmitLValueForBitfield(llvm::Value *BaseValue,
 /// that the base value is a pointer to the enclosing record, derive
 /// an lvalue for the ultimate field.
 LValue CodeGenFunction::EmitLValueForAnonRecordField(llvm::Value *BaseValue,
-                                                     const FieldDecl *Field,
+                                             const IndirectFieldDecl *Field,
                                                      unsigned CVRQualifiers) {
-  llvm::SmallVector<const FieldDecl *, 8> Path;
-  Path.push_back(Field);
-
-  while (Field->getParent()->isAnonymousStructOrUnion()) {
-    const ValueDecl *VD = Field->getParent()->getAnonymousStructOrUnionObject();
-    if (!isa<FieldDecl>(VD)) break;
-    Field = cast<FieldDecl>(VD);
-    Path.push_back(Field);
-  }
-
-  llvm::SmallVectorImpl<const FieldDecl*>::reverse_iterator
-    I = Path.rbegin(), E = Path.rend();
+  IndirectFieldDecl::chain_iterator I = Field->chain_begin(),
+    IEnd = Field->chain_end();
   while (true) {
-    LValue LV = EmitLValueForField(BaseValue, *I, CVRQualifiers);
-    if (++I == E) return LV;
+    LValue LV = EmitLValueForField(BaseValue, cast<FieldDecl>(*I), CVRQualifiers);
+    if (++I == IEnd) return LV;
 
     assert(LV.isSimple());
     BaseValue = LV.getAddress();
diff --git a/lib/CodeGen/CGObjC.cpp b/lib/CodeGen/CGObjC.cpp
index a8acb2b72f..b7a6224000 100644
--- a/lib/CodeGen/CGObjC.cpp
+++ b/lib/CodeGen/CGObjC.cpp
@@ -432,7 +432,7 @@ void CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP,
   if (ctor) {
     for (unsigned I = 0, E = IvarInitializers.size(); I != E; ++I) {
       CXXBaseOrMemberInitializer *IvarInit = IvarInitializers[I];
-      FieldDecl *Field = IvarInit->getMember();
+      FieldDecl *Field = IvarInit->getAnyMember();
       QualType FieldType = Field->getType();
       ObjCIvarDecl  *Ivar = cast<ObjCIvarDecl>(Field);
       LValue LV = EmitLValueForIvar(TypeOfSelfObject(), 
@@ -448,7 +448,7 @@ void CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP,
   } else {
     // dtor
     for (size_t i = IvarInitializers.size(); i > 0; --i) {
-      FieldDecl *Field = IvarInitializers[i - 1]->getMember();
+      FieldDecl *Field = IvarInitializers[i - 1]->getAnyMember();
       QualType FieldType = Field->getType();
       const ConstantArrayType *Array = 
         getContext().getAsConstantArrayType(FieldType);
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index 9730b0d4a8..3799c6309c 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -1429,7 +1429,7 @@ public:
   llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
                               const ObjCIvarDecl *Ivar);
   LValue EmitLValueForAnonRecordField(llvm::Value* Base,
-                                      const FieldDecl* Field,
+                                      const IndirectFieldDecl* Field,
                                       unsigned CVRQualifiers);
   LValue EmitLValueForField(llvm::Value* Base, const FieldDecl* Field,
                             unsigned CVRQualifiers);