add a helper method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20578 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Target/TargetData.h b/include/llvm/Target/TargetData.h
index 3879b74c7e5e9fe7ea2ee2e7e87e6721e4771c0f..eb4baa999c2c5bb4d00742f5d0c84ec7eb6dc4a4 100644 (file)
--- a/include/llvm/Target/TargetData.h
+++ b/include/llvm/Target/TargetData.h
@@ -119,6 +119,11 @@ public:
   std::vector<uint64_t> MemberOffsets;
   uint64_t StructSize;
   unsigned StructAlignment;
+
+  /// getElementContainingOffset - Given a valid offset into the structure,
+  /// return the structure index that contains it.
+  unsigned getElementContainingOffset(uint64_t Offset) const;
+
 private:
   friend class TargetData;   // Only TargetData can create this class
   StructLayout(const StructType *ST, const TargetData &TD);