Merge experimental/gc branch to the bleeding_edge.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
===================================================================
--- src/x64/assembler-x64.h	(revision 9327)
+++ src/x64/assembler-x64.h	(working copy)
@@ -215,6 +215,12 @@
     return names[index];
   }
 
+  static XMMRegister from_code(int code) {
+    ASSERT(code >= 0);
+    ASSERT(code < kNumRegisters);
+    XMMRegister r = { code };
+    return r;
+  }
   bool is_valid() const { return 0 <= code_ && code_ < kNumRegisters; }
   bool is(XMMRegister reg) const { return code_ == reg.code_; }
   int code() const {
@@ -735,6 +741,10 @@
     immediate_arithmetic_op_32(0x0, dst, src);
   }
 
+  void addl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x01, src, dst);
+  }
+
   void addq(Register dst, Register src) {
     arithmetic_op(0x03, dst, src);
   }
@@ -1394,13 +1404,14 @@
   static const int kMaximalBufferSize = 512*MB;
   static const int kMinimalBufferSize = 4*KB;
 
+  byte byte_at(int pos)  { return buffer_[pos]; }
+  void set_byte_at(int pos, byte value) { buffer_[pos] = value; }
+
  protected:
   bool emit_debug_code() const { return emit_debug_code_; }
 
  private:
   byte* addr_at(int pos)  { return buffer_ + pos; }
-  byte byte_at(int pos)  { return buffer_[pos]; }
-  void set_byte_at(int pos, byte value) { buffer_[pos] = value; }
   uint32_t long_at(int pos)  {
     return *reinterpret_cast<uint32_t*>(addr_at(pos));
   }