[turbofan] Initial support for Switch.

src/disassembler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 97 matching lines @@
         constants = num_const;
         pc += 4;
       } else if (it != NULL && !it->done() && it->rinfo()->pc() == pc &&
           it->rinfo()->rmode() == RelocInfo::INTERNAL_REFERENCE) {
         // raw pointer embedded in code stream, e.g., jump table
         byte* ptr = *reinterpret_cast<byte**>(pc);
         SNPrintF(decode_buffer,
                  "%08" V8PRIxPTR "      jump table entry %4" V8PRIdPTR,
                  reinterpret_cast<intptr_t>(ptr),
                  ptr - begin);
-        pc += 4;
+        pc += sizeof(ptr);
       } else {
         decode_buffer[0] = '\0';
         pc += d.InstructionDecode(decode_buffer, pc);
       }
     }
 #else  // !V8_TARGET_ARCH_PPC
 #if ABI_USES_FUNCTION_DESCRIPTORS || V8_OOL_CONSTANT_POOL
     // Function descriptors are specially decoded and skipped.
     // Other internal references (load of ool constant pool pointer)
     // are not since they are a encoded as a regular mov sequence.
@@ skipping 182 matching lines @@
 #else  // ENABLE_DISASSEMBLER
 
 int Disassembler::Decode(Isolate* isolate, std::ostream* os, byte* begin,
                          byte* end, Code* code) {
   return 0;
 }
 
 #endif  // ENABLE_DISASSEMBLER
 
 } }  // namespace v8::internal