Type Feedback Vector: Calculate profiler counts on the fly.

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 2809 matching lines @@
   __ TailCallStub(&stub);
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
   ASM_LOCATION("CallICStub");
 
   // x1 - function
   // x3 - slot id (Smi)
   // x2 - vector
-  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);
 
   Register function = x1;
   Register feedback_vector = x2;
   Register index = x3;
 
   // The checks. First, does x1 match the recorded monomorphic target?
   __ Add(x4, feedback_vector,
@@ skipping 57 matching lines @@
   __ JumpIfRoot(x4, Heap::kuninitialized_symbolRootIndex, &miss);
 
   // 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(x4);
   __ JumpIfNotObjectType(x4, x5, x5, JS_FUNCTION_TYPE, &miss);
   __ Add(x4, feedback_vector,
          Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ LoadRoot(x5, Heap::kmegamorphic_symbolRootIndex);
   __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize));
-  // We have to update statistics for runtime profiling.
-  __ Ldr(x4, FieldMemOperand(feedback_vector, with_types_offset));
-  __ Subs(x4, x4, Operand(Smi::FromInt(1)));
-  __ Str(x4, FieldMemOperand(feedback_vector, with_types_offset));
-  __ Ldr(x4, FieldMemOperand(feedback_vector, generic_offset));
-  __ Adds(x4, x4, Operand(Smi::FromInt(1)));
-  __ Str(x4, FieldMemOperand(feedback_vector, generic_offset));
 
   __ Bind(&call);
   __ Mov(x0, argc);
   __ Jump(masm->isolate()->builtins()->Call(convert_mode()),
           RelocInfo::CODE_TARGET);
 
   __ bind(&uninitialized);
 
   // We are going monomorphic, provided we actually have a JSFunction.
   __ JumpIfSmi(function, &miss);
 
   // Goto miss case if we do not have a function.
   __ JumpIfNotObjectType(function, x5, x5, JS_FUNCTION_TYPE, &miss);
 
   // Make sure the function is not the Array() function, which requires special
   // behavior on MISS.
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, x5);
   __ Cmp(function, x5);
   __ B(eq, &miss);
 
   // Make sure the function belongs to the same native context.
   __ Ldr(x4, FieldMemOperand(function, JSFunction::kContextOffset));
   __ Ldr(x4, ContextMemOperand(x4, Context::NATIVE_CONTEXT_INDEX));
   __ Ldr(x5, NativeContextMemOperand());
   __ Cmp(x4, x5);
   __ B(ne, &miss);
 
-  // Update stats.
-  __ Ldr(x4, FieldMemOperand(feedback_vector, with_types_offset));
-  __ Adds(x4, x4, Operand(Smi::FromInt(1)));
-  __ Str(x4, FieldMemOperand(feedback_vector, with_types_offset));
-
   // Initialize the call counter.
   __ Mov(x5, Smi::FromInt(CallICNexus::kCallCountIncrement));
   __ Adds(x4, feedback_vector,
           Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize + kPointerSize));
 
   // Store the function. Use a stub since we need a frame for allocation.
   // x2 - vector
   // x3 - slot
   // x1 - function
@@ skipping 2848 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64