Add LiveIntervals::Interval::empty() member function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11520 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/CodeGen/LiveIntervalAnalysis.h b/lib/CodeGen/LiveIntervalAnalysis.h
index ca2558628e..82cf91c257 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.h
+++ b/lib/CodeGen/LiveIntervalAnalysis.h
@@ -42,13 +42,15 @@ namespace llvm {
 
             Interval(unsigned r);
 
+            bool empty() const { return ranges.empty(); }
+
             unsigned start() const {
-                assert(!ranges.empty() && "empty interval for register");
+                assert(!empty() && "empty interval for register");
                 return ranges.front().first;
             }
 
             unsigned end() const {
-                assert(!ranges.empty() && "empty interval for register");
+                assert(!empty() && "empty interval for register");
                 return ranges.back().second;
             }