[clang] Remove some uses of llvm::StructType::setBody. NFC. (#113691)

It is simple to create the struct body up front, now that we have
transitioned to opaque pointers.

Author: jayfoad

clang/lib/CodeGen/CGBlocks.cpp

@@ -2590,10 +2590,6 @@ const BlockByrefInfo &CodeGenFunction::getBlockByrefInfo(const VarDecl *D) {
   if (it != BlockByrefInfos.end())
     return it->second;
 
-  llvm::StructType *byrefType =
-    llvm::StructType::create(getLLVMContext(),
-                             "struct.__block_byref_" + D->getNameAsString());
-
   QualType Ty = D->getType();
 
   CharUnits size;
@@ -2658,7 +2654,9 @@ const BlockByrefInfo &CodeGenFunction::getBlockByrefInfo(const VarDecl *D) {
   }
   types.push_back(varTy);
 
-  byrefType->setBody(types, packed);
+  llvm::StructType *byrefType = llvm::StructType::create(
+      getLLVMContext(), types, "struct.__block_byref_" + D->getNameAsString(),
+      packed);
 
   BlockByrefInfo info;
   info.Type = byrefType;

clang/lib/CodeGen/CGObjCGNU.cpp

@@ -1509,8 +1509,8 @@ class CGObjCGNUstep2 : public CGObjCGNUstep {
   GetSectionBounds(StringRef Section) {
     if (CGM.getTriple().isOSBinFormatCOFF()) {
       if (emptyStruct == nullptr) {
-        emptyStruct = llvm::StructType::create(VMContext, ".objc_section_sentinel");
-        emptyStruct->setBody({}, /*isPacked*/true);
+        emptyStruct = llvm::StructType::create(
+            VMContext, {}, ".objc_section_sentinel", /*isPacked=*/true);
       }
       auto ZeroInit = llvm::Constant::getNullValue(emptyStruct);
       auto Sym = [&](StringRef Prefix, StringRef SecSuffix) {

clang/lib/CodeGen/CGObjCMac.cpp

@@ -5835,15 +5835,7 @@ ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
   // struct _objc_protocol_extension *
   ProtocolExtensionPtrTy = llvm::PointerType::getUnqual(ProtocolExtensionTy);
 
-  // Handle recursive construction of Protocol and ProtocolList types
-
-  ProtocolTy =
-    llvm::StructType::create(VMContext, "struct._objc_protocol");
-
-  ProtocolListTy =
-    llvm::StructType::create(VMContext, "struct._objc_protocol_list");
-  ProtocolListTy->setBody(llvm::PointerType::getUnqual(ProtocolListTy), LongTy,
-                          llvm::ArrayType::get(ProtocolTy, 0));
+  // Handle construction of Protocol and ProtocolList types
 
   // struct _objc_protocol {
   //   struct _objc_protocol_extension *isa;
@@ -5852,9 +5844,16 @@ ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
   //   struct _objc_method_description_list *instance_methods;
   //   struct _objc_method_description_list *class_methods;
   // }
-  ProtocolTy->setBody(ProtocolExtensionPtrTy, Int8PtrTy,
-                      llvm::PointerType::getUnqual(ProtocolListTy),
-                      MethodDescriptionListPtrTy, MethodDescriptionListPtrTy);
+  ProtocolTy = llvm::StructType::create(
+      {ProtocolExtensionPtrTy, Int8PtrTy,
+       llvm::PointerType::getUnqual(VMContext), MethodDescriptionListPtrTy,
+       MethodDescriptionListPtrTy},
+      "struct._objc_protocol");
+
+  ProtocolListTy =
+      llvm::StructType::create({llvm::PointerType::getUnqual(VMContext), LongTy,
+                                llvm::ArrayType::get(ProtocolTy, 0)},
+                               "struct._objc_protocol_list");
 
   // struct _objc_protocol_list *
   ProtocolListPtrTy = llvm::PointerType::getUnqual(ProtocolListTy);
@@ -5886,8 +5885,6 @@ ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
       "struct._objc_class_extension", IntTy, Int8PtrTy, PropertyListPtrTy);
   ClassExtensionPtrTy = llvm::PointerType::getUnqual(ClassExtensionTy);
 
-  ClassTy = llvm::StructType::create(VMContext, "struct._objc_class");
-
   // struct _objc_class {
   //   Class isa;
   //   Class super_class;
@@ -5902,10 +5899,12 @@ ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
   //   char *ivar_layout;
   //   struct _objc_class_ext *ext;
   // };
-  ClassTy->setBody(llvm::PointerType::getUnqual(ClassTy),
-                   llvm::PointerType::getUnqual(ClassTy), Int8PtrTy, LongTy,
-                   LongTy, LongTy, IvarListPtrTy, MethodListPtrTy, CachePtrTy,
-                   ProtocolListPtrTy, Int8PtrTy, ClassExtensionPtrTy);
+  ClassTy = llvm::StructType::create(
+      {llvm::PointerType::getUnqual(VMContext),
+       llvm::PointerType::getUnqual(VMContext), Int8PtrTy, LongTy, LongTy,
+       LongTy, IvarListPtrTy, MethodListPtrTy, CachePtrTy, ProtocolListPtrTy,
+       Int8PtrTy, ClassExtensionPtrTy},
+      "struct._objc_class");
 
   ClassPtrTy = llvm::PointerType::getUnqual(ClassTy);
 
@@ -5988,13 +5987,9 @@ ObjCNonFragileABITypesHelper::ObjCNonFragileABITypesHelper(CodeGen::CodeGenModul
   //   const struct _prop_list_t * class_properties;
   // }
 
-  // Holder for struct _protocol_list_t *
-  ProtocolListnfABITy =
-    llvm::StructType::create(VMContext, "struct._objc_protocol_list");
-
   ProtocolnfABITy = llvm::StructType::create(
       "struct._protocol_t", ObjectPtrTy, Int8PtrTy,
-      llvm::PointerType::getUnqual(ProtocolListnfABITy), MethodListnfABIPtrTy,
+      llvm::PointerType::getUnqual(VMContext), MethodListnfABIPtrTy,
       MethodListnfABIPtrTy, MethodListnfABIPtrTy, MethodListnfABIPtrTy,
       PropertyListPtrTy, IntTy, IntTy, Int8PtrPtrTy, Int8PtrTy,
       PropertyListPtrTy);
@@ -6006,8 +6001,9 @@ ObjCNonFragileABITypesHelper::ObjCNonFragileABITypesHelper(CodeGen::CodeGenModul
   //   long protocol_count;   // Note, this is 32/64 bit
   //   struct _protocol_t *[protocol_count];
   // }
-  ProtocolListnfABITy->setBody(LongTy,
-                               llvm::ArrayType::get(ProtocolnfABIPtrTy, 0));
+  ProtocolListnfABITy = llvm::StructType::create(
+      {LongTy, llvm::ArrayType::get(ProtocolnfABIPtrTy, 0)},
+      "struct._objc_protocol_list");
 
   // struct _objc_protocol_list*
   ProtocolListnfABIPtrTy = llvm::PointerType::getUnqual(ProtocolListnfABITy);
@@ -6067,11 +6063,12 @@ ObjCNonFragileABITypesHelper::ObjCNonFragileABITypesHelper(CodeGen::CodeGenModul
   //   struct class_ro_t *ro;
   // }
 
-  ClassnfABITy = llvm::StructType::create(VMContext, "struct._class_t");
-  ClassnfABITy->setBody(llvm::PointerType::getUnqual(ClassnfABITy),
-                        llvm::PointerType::getUnqual(ClassnfABITy), CachePtrTy,
-                        llvm::PointerType::getUnqual(ImpnfABITy),
-                        llvm::PointerType::getUnqual(ClassRonfABITy));
+  ClassnfABITy = llvm::StructType::create(
+      {llvm::PointerType::getUnqual(VMContext),
+       llvm::PointerType::getUnqual(VMContext), CachePtrTy,
+       llvm::PointerType::getUnqual(ImpnfABITy),
+       llvm::PointerType::getUnqual(ClassRonfABITy)},
+      "struct._class_t");
 
   // LLVM for struct _class_t *
   ClassnfABIPtrTy = llvm::PointerType::getUnqual(ClassnfABITy);

clang/lib/CodeGen/MicrosoftCXXABI.cpp

@@ -529,31 +529,29 @@ class MicrosoftCXXABI : public CGCXXABI {
     if (ClassHierarchyDescriptorType)
       return ClassHierarchyDescriptorType;
     // Forward-declare RTTIClassHierarchyDescriptor to break a cycle.
-    ClassHierarchyDescriptorType = llvm::StructType::create(
-        CGM.getLLVMContext(), "rtti.ClassHierarchyDescriptor");
     llvm::Type *FieldTypes[] = {CGM.IntTy, CGM.IntTy, CGM.IntTy,
                                 getImageRelativeType(CGM.UnqualPtrTy)};
-    ClassHierarchyDescriptorType->setBody(FieldTypes);
+    ClassHierarchyDescriptorType =
+        llvm::StructType::create(FieldTypes, "rtti.ClassHierarchyDescriptor");
     return ClassHierarchyDescriptorType;
   }
 
   llvm::StructType *getCompleteObjectLocatorType() {
     if (CompleteObjectLocatorType)
       return CompleteObjectLocatorType;
-    CompleteObjectLocatorType = llvm::StructType::create(
-        CGM.getLLVMContext(), "rtti.CompleteObjectLocator");
     llvm::Type *FieldTypes[] = {
         CGM.IntTy,
         CGM.IntTy,
         CGM.IntTy,
         getImageRelativeType(CGM.Int8PtrTy),
         getImageRelativeType(CGM.UnqualPtrTy),
-        getImageRelativeType(CompleteObjectLocatorType),
+        getImageRelativeType(CGM.VoidTy),
     };
     llvm::ArrayRef<llvm::Type *> FieldTypesRef(FieldTypes);
     if (!isImageRelative())
       FieldTypesRef = FieldTypesRef.drop_back();
-    CompleteObjectLocatorType->setBody(FieldTypesRef);
+    CompleteObjectLocatorType =
+        llvm::StructType::create(FieldTypesRef, "rtti.CompleteObjectLocator");
     return CompleteObjectLocatorType;
   }