Add empty() member functions to a few container-like classes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42487 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 3 insertions, 0 deletions

diff --git a/include/llvm/Analysis/CallGraph.h b/include/llvm/Analysis/CallGraph.h
index 4f4ce0e9f1..203288dc9a 100644
--- a/include/llvm/Analysis/CallGraph.h
+++ b/include/llvm/Analysis/CallGraph.h
@@ -189,6 +189,7 @@ public:
   inline iterator end()   { return CalledFunctions.end();   }
   inline const_iterator begin() const { return CalledFunctions.begin(); }
   inline const_iterator end()   const { return CalledFunctions.end();   }
+  inline bool empty() const { return CalledFunctions.empty(); }
   inline unsigned size() const { return CalledFunctions.size(); }
 
   // Subscripting operator - Return the i'th called function...
diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h
index acb5fd6c7a..86dc571fd4 100644
--- a/include/llvm/Analysis/LoopInfo.h
+++ b/include/llvm/Analysis/LoopInfo.h
@@ -79,6 +79,7 @@ public:
   typedef std::vector<Loop*>::const_iterator iterator;
   iterator begin() const { return SubLoops.begin(); }
   iterator end() const { return SubLoops.end(); }
+  bool empty() const { return SubLoops.empty(); }
 
   /// getBlocks - Get a list of the basic blocks which make up this loop.
   ///
diff --git a/include/llvm/Support/CallSite.h b/include/llvm/Support/CallSite.h
index e14caad642..fec7efc4cb 100644
--- a/include/llvm/Support/CallSite.h
+++ b/include/llvm/Support/CallSite.h
@@ -110,6 +110,7 @@ public:
       return I->op_begin()+3; // Skip Function, BB, BB
   }
   arg_iterator arg_end() const { return I->op_end(); }
+  bool arg_empty() const { return arg_end() == arg_begin(); }
   unsigned arg_size() const { return unsigned(arg_end() - arg_begin()); }
 
   bool operator<(const CallSite &CS) const {