diff --git a/lib/CodeGen/RegAllocBasic.cpp b/lib/CodeGen/RegAllocBasic.cpp
index b8c04fc..b722098 100644
--- a/lib/CodeGen/RegAllocBasic.cpp
+++ b/lib/CodeGen/RegAllocBasic.cpp
@@ -12,7 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "regalloc"
 #include "llvm/CodeGen/Passes.h"
 #include "AllocationOrder.h"
 #include "LiveDebugVariables.h"
@@ -41,6 +40,8 @@
 
 using namespace llvm;
 
+#define DEBUG_TYPE "regalloc"
+
 static RegisterRegAlloc basicRegAlloc("basic", "basic register allocator",
                                       createBasicRegisterAllocator);
 
@@ -93,7 +94,7 @@
 
   LiveInterval *dequeue() override {
     if (Queue.empty())
-      return 0;
+      return nullptr;
     LiveInterval *LI = Queue.top();
     Queue.pop();
     return LI;
@@ -156,7 +157,7 @@
 }
 
 void RABasic::releaseMemory() {
-  SpillerInstance.reset(0);
+  SpillerInstance.reset(nullptr);
 }