Set SSARegMap to NULL after deleting it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4822 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h
index f4a5180e32238d98f254f7f2c430b4222822beca..0e0aa51036744e38522a9410ba401be72b5a150c 100644 (file)
--- a/include/llvm/CodeGen/MachineFunction.h
+++ b/include/llvm/CodeGen/MachineFunction.h
@@ -97,7 +97,10 @@ public:
   void addRegMap(unsigned Reg, const TargetRegisterClass *RegClass) {
     SSARegMapping->addRegMap(Reg, RegClass);
   }
-  void clearSSARegMap() { delete SSARegMapping; }
+  void clearSSARegMap() { 
+    delete SSARegMapping;
+    SSARegMapping = NULL;
+  }
 
   // Provide accessors for the MachineBasicBlock list...
   typedef iplist<MachineBasicBlock> BasicBlockListType;