Set up MCSchedModel after detecting the CPU type in X86SubTarget.

Corrects a problem whereby MCSchedModel was not being set up when
the CPU type was auto-detected.

Patch by Andy Zhang.

llvm-svn: 165122

Author: pgurd

llvm/lib/Target/X86/X86Subtarget.cpp

@@ -401,6 +401,10 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU,
     }
   }
 
+  // CPUName may have been set by the CPU detection code. Make sure the
+  // new MCSchedModel is used.
+  InitMCProcessorInfo(CPUName, FS);
+
   if (X86ProcFamily == IntelAtom)
     PostRAScheduler = true;