expand DIContext interface a bit

Summary:
This allows a bit more control for scenarios where client might
modifiy a DIContext

Reviewers: twoh, Kader, modocache

Reviewed By: Kader

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D56505

1 files changed, 6 insertions, 1 deletions

diff --git a/llvm/include/llvm/DebugInfo/DIContext.h b/llvm/include/llvm/DebugInfo/DIContext.h
index bbdd5e0d9c3..85e96402a24 100644
--- a/llvm/include/llvm/DebugInfo/DIContext.h
+++ b/llvm/include/llvm/DebugInfo/DIContext.h
@@ -81,7 +81,7 @@ class DIInliningInfo {
 public:
   DIInliningInfo() = default;
 
-  DILineInfo getFrame(unsigned Index) const {
+  const DILineInfo & getFrame(unsigned Index) const {
     assert(Index < Frames.size());
     return Frames[Index];
   }
@@ -98,6 +98,11 @@ public:
   void addFrame(const DILineInfo &Frame) {
     Frames.push_back(Frame);
   }
+  
+  void resize(unsigned i) {
+    Frames.resize(i);
+  }
+  
 };
 
 /// Container for description of a global variable.