Type Feedback Vector: Calculate profiler counts on the fly.

src/arm/code-stubs-arm.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_ARM
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 2430 matching lines @@
   __ mov(r3, r1);
   ArrayConstructorStub stub(masm->isolate(), arg_count());
   __ TailCallStub(&stub);
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
   // r1 - function
   // r3 - slot id (Smi)
   // r2 - 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);
 
   // The checks. First, does r1 match the recorded monomorphic target?
   __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3));
   __ ldr(r4, FieldMemOperand(r4, 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 55 matching lines @@
   __ b(eq, &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(r4);
   __ CompareObjectType(r4, r5, r5, JS_FUNCTION_TYPE);
   __ b(ne, &miss);
   __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3));
   __ LoadRoot(ip, Heap::kmegamorphic_symbolRootIndex);
   __ str(ip, FieldMemOperand(r4, FixedArray::kHeaderSize));
-  // We have to update statistics for runtime profiling.
-  __ ldr(r4, FieldMemOperand(r2, with_types_offset));
-  __ sub(r4, r4, Operand(Smi::FromInt(1)));
-  __ str(r4, FieldMemOperand(r2, with_types_offset));
-  __ ldr(r4, FieldMemOperand(r2, generic_offset));
-  __ add(r4, r4, Operand(Smi::FromInt(1)));
-  __ str(r4, FieldMemOperand(r2, generic_offset));
 
   __ bind(&call);
   __ mov(r0, Operand(argc));
   __ Jump(masm->isolate()->builtins()->Call(convert_mode()),
           RelocInfo::CODE_TARGET);
 
   __ bind(&uninitialized);
 
   // We are going monomorphic, provided we actually have a JSFunction.
   __ JumpIfSmi(r1, &miss);
 
   // Goto miss case if we do not have a function.
   __ CompareObjectType(r1, r4, r4, JS_FUNCTION_TYPE);
   __ b(ne, &miss);
 
   // Make sure the function is not the Array() function, which requires special
   // behavior on MISS.
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r4);
   __ cmp(r1, r4);
   __ b(eq, &miss);
 
   // Make sure the function belongs to the same native context.
   __ ldr(r4, FieldMemOperand(r1, JSFunction::kContextOffset));
   __ ldr(r4, ContextMemOperand(r4, Context::NATIVE_CONTEXT_INDEX));
   __ ldr(ip, NativeContextMemOperand());
   __ cmp(r4, ip);
   __ b(ne, &miss);
 
-  // Update stats.
-  __ ldr(r4, FieldMemOperand(r2, with_types_offset));
-  __ add(r4, r4, Operand(Smi::FromInt(1)));
-  __ str(r4, FieldMemOperand(r2, with_types_offset));
-
   // Initialize the call counter.
   __ Move(r5, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
   __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3));
   __ str(r5, FieldMemOperand(r4, FixedArray::kHeaderSize + kPointerSize));
 
   // Store the function. Use a stub since we need a frame for allocation.
   // r2 - vector
   // r3 - slot
   // r1 - function
   {
@@ skipping 2802 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM