CPU: Merge the predecoder and decoder.

These classes are always used together, and merging them will give the ISAs
more flexibility in how they cache things and manage the process.

--HG--
rename : src/arch/x86/predecoder_tables.cc => src/arch/x86/decoder_tables.cc

src/cpu/checker/cpu.hh

@@ -47,7 +47,6 @@
 #include <map>
 #include <queue>
 
-#include "arch/predecoder.hh"
 #include "arch/types.hh"
 #include "base/statistics.hh"
 #include "cpu/base.hh"
@@ -156,9 +155,6 @@ class CheckerCPU : public BaseCPU
     // keep them all in a std::queue
     std::queue<Result> result;
 
-    // current instruction
-    TheISA::MachInst machInst;
-
     // Pointer to the one memory request.
     RequestPtr memReq;
 
@@ -401,8 +397,7 @@ class Checker : public CheckerCPU
 
   public:
     Checker(Params *p)
-        : CheckerCPU(p), updateThisCycle(false), unverifiedInst(NULL),
-          predecoder(NULL)
+        : CheckerCPU(p), updateThisCycle(false), unverifiedInst(NULL)
     { }
 
     void switchOut();
@@ -434,7 +429,6 @@ class Checker : public CheckerCPU
     bool updateThisCycle;
 
     DynInstPtr unverifiedInst;
-    TheISA::Predecoder predecoder;
 
     std::list<DynInstPtr> instList;
     typedef typename std::list<DynInstPtr>::iterator InstListIt;