Teach __builtin_offsetof to compute the offsets of members of base

classes, since we only warn (not error) on offsetof() for non-POD
types. We store the base path within the OffsetOfExpr itself, then
evaluate the offsets within the constant evaluator.

llvm-svn: 102571

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/Frontend/PCHReaderStmt.cpp b/clang/lib/Frontend/PCHReaderStmt.cpp
index 8588c8aa1a2..ef6b77026d7 100644
--- a/clang/lib/Frontend/PCHReaderStmt.cpp
+++ b/clang/lib/Frontend/PCHReaderStmt.cpp
@@ -462,6 +462,11 @@ unsigned PCHStmtReader::VisitOffsetOfExpr(OffsetOfExpr *E) {
     case Node::Identifier:
       E->setComponent(I, Node(Start, Reader.GetIdentifier(Record[Idx++]), End));
       break;
+        
+    case Node::Base:
+      // FIXME: Implement this!
+      llvm_unreachable("PCH for offsetof(base-specifier) not implemented");
+      break;
     }
   }