X64: Change strategy for spilling to match ia32. It's just better.

src/x64/assembler-x64.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 364 matching lines @@
 
 
 void Assembler::Align(int m) {
   ASSERT(IsPowerOf2(m));
   while ((pc_offset() & (m - 1)) != 0) {
     nop();
   }
 }
 
 
+void Assembler::CodeTargetAlign() {
+  Align(16);  // Preferred alignment of jump targets on x64.
+}
+
+
 void Assembler::bind_to(Label* L, int pos) {
   ASSERT(!L->is_bound());  // Label may only be bound once.
   last_pc_ = NULL;
   ASSERT(0 <= pos && pos <= pc_offset());  // Position must be valid.
   if (L->is_linked()) {
     int current = L->pos();
     int next = long_at(current);
     while (next != current) {
       // Relative address, relative to point after address.
       int imm32 = pos - (current + sizeof(int32_t));
@@ skipping 2469 matching lines @@
   // specially coded on x64 means that it is a relative 32 bit address, as used
   // by branch instructions.
   return (1 << rmode_) & kApplyMask;
 }
 
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64