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, 1 deletions

diff --git a/clang/lib/AST/StmtPrinter.cpp b/clang/lib/AST/StmtPrinter.cpp
index b50bb0ce7e1..52f627d449e 100644
--- a/clang/lib/AST/StmtPrinter.cpp
+++ b/clang/lib/AST/StmtPrinter.cpp
@@ -718,7 +718,11 @@ void StmtPrinter::VisitOffsetOfExpr(OffsetOfExpr *Node) {
       PrintedSomething = true;
       continue;
     }
-     
+
+    // Skip implicit base indirections.
+    if (ON.getKind() == OffsetOfExpr::OffsetOfNode::Base)
+      continue;
+
     // Field or identifier node.
     IdentifierInfo *Id = ON.getFieldName();
     if (!Id)