Use ASTRecordLayout for computing ivar offsets instead of shadow

struct.
 - We still need to do more lookup than necessary because ivars don't
   live in a reasonable DeclContext.

 - The only remaining client of the interface shadow struct is the
   ivar layout bitmap.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70756 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index f58291ee21..ac70cef499 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -744,6 +744,8 @@ const RecordDecl *ASTContext::addRecordToClass(const ObjCInterfaceDecl *D) {
 const ASTRecordLayout &
 ASTContext::getObjCLayout(const ObjCInterfaceDecl *D,
                           const ObjCImplementationDecl *Impl) {
+  assert(!D->isForwardDecl() && "Invalid interface decl!");
+
   // Look up this layout, if already laid out, return what we have.
   ObjCContainerDecl *Key = 
     Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D;
@@ -768,6 +770,9 @@ ASTContext::getObjCLayout(const ObjCInterfaceDecl *D,
 
   ASTRecordLayout *NewEntry = NULL;
   if (ObjCInterfaceDecl *SD = D->getSuperClass()) {
+    // FIXME: This increment of FieldCount is wrong, we don't actually
+    // count the super class as a member (see the field index passed
+    // to LayoutField below).
     FieldCount++;
     const ASTRecordLayout &SL = getASTObjCInterfaceLayout(SD);
     unsigned Alignment = SL.getAlignment();