VM: Don't emit usage counter and range feedback code and when optimizations are disabled.

runtime/vm/stub_code.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/stub_code.h"
 
 #include "platform/assert.h"
 #include "platform/globals.h"
 #include "vm/assembler.h"
 #include "vm/disassembler.h"
@@ skipping 133 matching lines @@
       StubCode::GeneratePatchableAllocateArrayStub(
           &assembler, &entry_patch_offset, &patch_code_offset);
     } else {
       StubCode::GenerateAllocationStubForClass(
           &assembler, cls, &entry_patch_offset, &patch_code_offset);
     }
     stub ^= Code::FinalizeCode(name, &assembler);
     stub.set_owner(cls);
     cls.set_allocation_stub(stub);
     if (FLAG_disassemble_stubs) {
+      LogBlock lb(Isolate::Current());
       ISL_Print("Code for allocation stub '%s': {\n", name);
       DisassembleToStdout formatter;
       stub.Disassemble(&formatter);
       ISL_Print("}\n");
     }
     stub.set_entry_patch_pc_offset(entry_patch_offset);
     stub.set_patch_code_pc_offset(patch_code_offset);
   }
   return stub.raw();
 }
@@ skipping 13 matching lines @@
   }
 }
 
 
 RawCode* StubCode::Generate(const char* name,
                             void (*GenerateStub)(Assembler* assembler)) {
   Assembler assembler;
   GenerateStub(&assembler);
   const Code& code = Code::Handle(Code::FinalizeCode(name, &assembler));
   if (FLAG_disassemble_stubs) {
+    LogBlock lb(Isolate::Current());
     ISL_Print("Code for stub '%s': {\n", name);
     DisassembleToStdout formatter;
     code.Disassemble(&formatter);
     ISL_Print("}\n");
   }
   return code.raw();
 }
 
 
 const char* StubCode::NameOfStub(uword entry_point) {
@@ skipping 11 matching lines @@
   Isolate* isolate = Isolate::Current();
   if ((isolate != NULL) && (isolate->stub_code() != NULL)) {
     STUB_CODE_LIST(STUB_CODE_TESTER);
   }
 #undef VM_STUB_CODE_TESTER
 #undef STUB_CODE_TESTER
   return NULL;
 }
 
 }  // namespace dart