Use empty() instead of comparing size() with zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46514 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index 0ca10b3..16f9b89 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -646,7 +646,7 @@
             } else if (FBB) {
               if (TBB!=IBB && FBB!=IBB)   // cbr then ubr
                 continue;
-            } else if (Cond.size() == 0) {
+            } else if (Cond.empty()) {
               if (TBB!=IBB)               // ubr
                 continue;
             } else {