Fix a leak on the r600 backend.

This should bring the valgrind bot back to life.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182561 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/R600/AMDGPUTargetMachine.cpp b/lib/Target/R600/AMDGPUTargetMachine.cpp
index 71be02a..88dc583 100644
--- a/lib/Target/R600/AMDGPUTargetMachine.cpp
+++ b/lib/Target/R600/AMDGPUTargetMachine.cpp
@@ -64,11 +64,11 @@
   InstrItins(&Subtarget.getInstrItineraryData()) {
   // TLInfo uses InstrInfo so it must be initialized after.
   if (Subtarget.device()->getGeneration() <= AMDGPUDeviceInfo::HD6XXX) {
-    InstrInfo = new R600InstrInfo(*this);
-    TLInfo = new R600TargetLowering(*this);
+    InstrInfo.reset(new R600InstrInfo(*this));
+    TLInfo.reset(new R600TargetLowering(*this));
   } else {
-    InstrInfo = new SIInstrInfo(*this);
-    TLInfo = new SITargetLowering(*this);
+    InstrInfo.reset(new SIInstrInfo(*this));
+    TLInfo.reset(new SITargetLowering(*this));
   }
   initAsmInfo();
 }