Change target-specific classes to use more precise static types.
This eliminates the need for several awkward casts, including
the last dynamic_cast under lib/Target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.h b/lib/Target/X86/X86InstrInfo.h
index 06080b7..b49fb31 100644
--- a/lib/Target/X86/X86InstrInfo.h
+++ b/lib/Target/X86/X86InstrInfo.h
@@ -250,7 +250,7 @@
   /// such, whenever a client has an instance of instruction info, it should
   /// always be able to get register info as well (through this method).
   ///
-  virtual const TargetRegisterInfo &getRegisterInfo() const { return RI; }
+  virtual const X86RegisterInfo &getRegisterInfo() const { return RI; }
 
   // Return true if the instruction is a register to register move and
   // leave the source and dest operands in the passed parameters.