X64: enable stack sampling in profiler.

src/ia32/codegen-ia32.cc

 // Copyright 2006-2009 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 5136 matching lines @@
   left.ToRegister();
   __ cmp(right.reg(), Operand(left.reg()));
   right.Unuse();
   left.Unuse();
   destination()->Split(equal);
 }
 
 
 void CodeGenerator::GenerateGetFramePointer(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 0);
-  ASSERT(kSmiTagSize == 1 && kSmiTag == 0);  // shifting code depends on this
+  ASSERT(kSmiTag == 0);  // EBP value is aligned, so it should look like Smi.
   Result ebp_as_smi = allocator_->Allocate();
   ASSERT(ebp_as_smi.is_valid());
   __ mov(ebp_as_smi.reg(), Operand(ebp));
-  __ shr(ebp_as_smi.reg(), kSmiTagSize);
   frame_->Push(&ebp_as_smi);
 }
 
 
 void CodeGenerator::GenerateRandomPositiveSmi(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 0);
   frame_->SpillAll();
 
   // Make sure the frame is aligned like the OS expects.
   static const int kFrameAlignment = OS::ActivationFrameAlignment();
@@ skipping 2745 matching lines @@
 
 int CompareStub::MinorKey() {
   // Encode the two parameters in a unique 16 bit value.
   ASSERT(static_cast<unsigned>(cc_) < (1 << 15));
   return (static_cast<unsigned>(cc_) << 1) | (strict_ ? 1 : 0);
 }
 
 #undef __
 
 } }  // namespace v8::internal