Add explicit keywords.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48801 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcInstrInfo.h b/lib/Target/Sparc/SparcInstrInfo.h
index 22b2dcd..e9ce790 100644
--- a/lib/Target/Sparc/SparcInstrInfo.h
+++ b/lib/Target/Sparc/SparcInstrInfo.h
@@ -35,7 +35,7 @@
   const SparcRegisterInfo RI;
   const SparcSubtarget& Subtarget;
 public:
-  SparcInstrInfo(SparcSubtarget &ST);
+  explicit SparcInstrInfo(SparcSubtarget &ST);
 
   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
   /// such, whenever a client has an instance of instruction info, it should