Use TargetMachine's register info instead of creating a new one and leaking it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157155 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 119a150..313d362 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -165,7 +165,7 @@
     Context->setAllowTemporaryLabels(false);
 
   const MCAsmInfo &MAI = *getMCAsmInfo();
-  const MCRegisterInfo &MRI = *getTarget().createMCRegInfo(getTargetTriple());
+  const MCRegisterInfo &MRI = *getRegisterInfo();
   const MCSubtargetInfo &STI = getSubtarget<MCSubtargetInfo>();
   OwningPtr<MCStreamer> AsmStreamer;