Type Feedback Vector: Calculate profiler counts on the fly.

src/ia32/code-stubs-ia32.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 2067 matching lines @@
 
   // Unreachable.
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
   // edi - function
   // edx - slot id
   // ebx - vector
   Isolate* isolate = masm->isolate();
-  const int with_types_offset =
-      FixedArray::OffsetOfElementAt(TypeFeedbackVector::kWithTypesIndex);
-  const int generic_offset =
-      FixedArray::OffsetOfElementAt(TypeFeedbackVector::kGenericCountIndex);
   Label extra_checks_or_miss, call, call_function;
   int argc = arg_count();
   ParameterCount actual(argc);
 
   // The checks. First, does edi match the recorded monomorphic target?
   __ mov(ecx, FieldOperand(ebx, edx, times_half_pointer_size,
                            FixedArray::kHeaderSize));
 
   // We don't know that we have a weak cell. We might have a private symbol
   // or an AllocationSite, but the memory is safe to examine.
@@ skipping 52 matching lines @@
   __ j(equal, &uninitialized);
 
   // We are going megamorphic. If the feedback is a JSFunction, it is fine
   // to handle it here. More complex cases are dealt with in the runtime.
   __ AssertNotSmi(ecx);
   __ CmpObjectType(ecx, JS_FUNCTION_TYPE, ecx);
   __ j(not_equal, &miss);
   __ mov(
       FieldOperand(ebx, edx, times_half_pointer_size, FixedArray::kHeaderSize),
       Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate)));
-  // We have to update statistics for runtime profiling.
-  __ sub(FieldOperand(ebx, with_types_offset), Immediate(Smi::FromInt(1)));
-  __ add(FieldOperand(ebx, generic_offset), Immediate(Smi::FromInt(1)));
 
   __ bind(&call);
   __ Set(eax, argc);
   __ Jump(masm->isolate()->builtins()->Call(convert_mode()),
           RelocInfo::CODE_TARGET);
 
   __ bind(&uninitialized);
 
   // We are going monomorphic, provided we actually have a JSFunction.
   __ JumpIfSmi(edi, &miss);
 
   // Goto miss case if we do not have a function.
   __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
   __ j(not_equal, &miss);
 
   // Make sure the function is not the Array() function, which requires special
   // behavior on MISS.
   __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx);
   __ cmp(edi, ecx);
   __ j(equal, &miss);
 
   // Make sure the function belongs to the same native context.
   __ mov(ecx, FieldOperand(edi, JSFunction::kContextOffset));
   __ mov(ecx, ContextOperand(ecx, Context::NATIVE_CONTEXT_INDEX));
   __ cmp(ecx, NativeContextOperand());
   __ j(not_equal, &miss);
 
-  // Update stats.
-  __ add(FieldOperand(ebx, with_types_offset), Immediate(Smi::FromInt(1)));
-
   // Initialize the call counter.
   __ mov(FieldOperand(ebx, edx, times_half_pointer_size,
                       FixedArray::kHeaderSize + kPointerSize),
          Immediate(Smi::FromInt(CallICNexus::kCallCountIncrement)));
 
   // Store the function. Use a stub since we need a frame for allocation.
   // ebx - vector
   // edx - slot
   // edi - function
   {
@@ skipping 3447 matching lines @@
                            Operand(ebp, 7 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32