Add explicit keywords.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72969 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86MachineFunctionInfo.h b/lib/Target/X86/X86MachineFunctionInfo.h
index 8a5ac2c..fafcf7e 100644
--- a/lib/Target/X86/X86MachineFunctionInfo.h
+++ b/lib/Target/X86/X86MachineFunctionInfo.h
@@ -73,14 +73,15 @@
                              SRetReturnReg(0),
                              GlobalBaseReg(0) {}
   
-  X86MachineFunctionInfo(MachineFunction &MF) : ForceFramePointer(false),
-                                                CalleeSavedFrameSize(0),
-                                                BytesToPopOnReturn(0),
-                                                DecorationStyle(None),
-                                                ReturnAddrIndex(0),
-                                                TailCallReturnAddrDelta(0),
-                                                SRetReturnReg(0),
-                                                GlobalBaseReg(0) {}
+  explicit X86MachineFunctionInfo(MachineFunction &MF)
+    : ForceFramePointer(false),
+      CalleeSavedFrameSize(0),
+      BytesToPopOnReturn(0),
+      DecorationStyle(None),
+      ReturnAddrIndex(0),
+      TailCallReturnAddrDelta(0),
+      SRetReturnReg(0),
+      GlobalBaseReg(0) {}
   
   bool getForceFramePointer() const { return ForceFramePointer;} 
   void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }