add some helper methods to make the type more uniform.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157554 91177308-0d34-0410-b5e6-96231b3b80d8
hylsd · May 28, 2012 · 2edc74a · 2edc74a
1 parent 8620890
commit 2edc74a
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/include/llvm/ADT/TinyPtrVector.h b/include/llvm/ADT/TinyPtrVector.h
@@ -120,6 +120,14 @@ class TinyPtrVector {
     return Val.template get<VecTy*>()->front();
   }
 
+  EltTy back() const {
+    assert(!empty() && "vector empty");
+    if (EltTy V = Val.template dyn_cast<EltTy>())
+      return V;
+    return Val.template get<VecTy*>()->back();
+  }
+
+
   void push_back(EltTy NewVal) {
     assert(NewVal != 0 && "Can't add a null value");
 
@@ -139,6 +147,15 @@ class TinyPtrVector {
     Val.template get<VecTy*>()->push_back(NewVal);
   }
 
+  void pop_back() {
+    // If we have a single value, convert to empty.
+    if (Val.template is<EltTy>())
+      Val = (EltTy)0;
+    else if (VecTy *Vec = Val.template get<VecTy*>())
+      Vec->pop_back();
+  }
+
+
   void clear() {
     // If we have a single value, convert to empty.
     if (Val.template is<EltTy>()) {