X87: [interpreter] Add basic framework for bytecode handler code generation.

src/compiler/x87/linkage-x87.cc

Index: src/compiler/x87/linkage-x87.cc
diff --git a/src/compiler/x87/linkage-x87.cc b/src/compiler/x87/linkage-x87.cc
index afe4365975dab18a9d601930b5e512d78815cddb..37bfd6d9e6300c4f26029a3a38ecd260b353062c 100644
--- a/src/compiler/x87/linkage-x87.cc
+++ b/src/compiler/x87/linkage-x87.cc
@@ -17,6 +17,8 @@ struct X87LinkageHelperTraits {
   static Register ReturnValue2Reg() { return edx; }
   static Register JSCallFunctionReg() { return edi; }
   static Register ContextReg() { return esi; }
+  static Register InterpreterBytecodePointerReg() { return edi; }
+  static Register InterpreterDispatchTableReg() { return ebx; }
   static Register RuntimeCallFunctionReg() { return ebx; }
   static Register RuntimeCallArgCountReg() { return eax; }
   static RegList CCalleeSaveRegisters() {
@@ -61,9 +63,8 @@ CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone,
 }
 
 
-CallDescriptor* Linkage::GetInterpreterDispatchDescriptor(
-    Zone* zone, const MachineSignature* sig) {
-  return LH::GetInterpreterDispatchDescriptor(zone, sig);
+CallDescriptor* Linkage::GetInterpreterDispatchDescriptor(Zone* zone) {
+  return LH::GetInterpreterDispatchDescriptor(zone);
 }
 
 }  // namespace compiler