[Statistics] Use Statistic::operator+= instead of adding and assigning separately.

I believe this technically fixes a multithreaded race condition in this code. But my primary concern was as part of looking at removing the ability to treat Statistics like a plain unsigned. There are many weird operations on Statistics in the codebase.

llvm-svn: 303314

2 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Scalar/EarlyCSE.cpp b/llvm/lib/Transforms/Scalar/EarlyCSE.cpp
index d8f8a58a5fd..c4f450949e6 100644
--- a/llvm/lib/Transforms/Scalar/EarlyCSE.cpp
+++ b/llvm/lib/Transforms/Scalar/EarlyCSE.cpp
@@ -606,7 +606,7 @@ bool EarlyCSE::processNode(DomTreeNode *Node) {
         if (unsigned Count = replaceDominatedUsesWith(
                 CondInst, TorF, DT, BasicBlockEdge(Pred, BB))) {
           Changed = true;
-          NumCSECVP = NumCSECVP + Count;
+          NumCSECVP += Count;
         }
       }
     }
diff --git a/llvm/lib/Transforms/Scalar/LoadCombine.cpp b/llvm/lib/Transforms/Scalar/LoadCombine.cpp
index 02215d3450c..494cbc61bc9 100644
--- a/llvm/lib/Transforms/Scalar/LoadCombine.cpp
+++ b/llvm/lib/Transforms/Scalar/LoadCombine.cpp
@@ -228,7 +228,7 @@ bool LoadCombine::combineLoads(SmallVectorImpl<LoadPOPPair> &Loads) {
     L.Load->replaceAllUsesWith(V);
   }
 
-  NumLoadsCombined = NumLoadsCombined + Loads.size();
+  NumLoadsCombined += Loads.size();
   return true;
 }