Remove uses of builtin comma operator.

Cleanup for upcoming Clang warning -Wcomma.  No functionality change intended.

llvm-svn: 261270
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 39a13c8..3881415 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -2268,8 +2268,10 @@
         C = dyn_cast<ConstantSDNode>(Op.getOperand(0));
         GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(1));
       }
-      if (!C || !GA)
-        C = nullptr, GA = nullptr;
+      if (!C || !GA) {
+        C = nullptr;
+        GA = nullptr;
+      }
     }
 
     // If we find a valid operand, map to the TargetXXX version so that the