Make the -verify-regalloc command line option available to base classes as
RegAllocBase::VerifyEnabled.

Run the machine code verifier in a few interesting places during RegAllocGreedy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122107 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocBase.h b/lib/CodeGen/RegAllocBase.h
index 438a7d1..193c144 100644
--- a/lib/CodeGen/RegAllocBase.h
+++ b/lib/CodeGen/RegAllocBase.h
@@ -156,6 +156,10 @@
   // Use this group name for NamedRegionTimer.
   static const char *TimerGroupName;
 
+public:
+  /// VerifyEnabled - True when -verify-regalloc is given.
+  static bool VerifyEnabled;
+
 private:
   void seedLiveVirtRegs(std::priority_queue<std::pair<float, unsigned> >&);