Type Feedback Vector: Calculate profiler counts on the fly.

src/mips/code-stubs-mips.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_MIPS
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 2559 matching lines @@
   __ mov(a3, a1);
   ArrayConstructorStub stub(masm->isolate(), arg_count());
   __ TailCallStub(&stub);
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
   // a1 - function
   // a3 - slot id (Smi)
   // a2 - 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?
   __ sll(t0, a3, kPointerSizeLog2 - kSmiTagSize);
   __ Addu(t0, a2, Operand(t0));
   __ lw(t0, FieldMemOperand(t0, FixedArray::kHeaderSize));
 
   // We don't know that we have a weak cell. We might have a private symbol
@@ skipping 56 matching lines @@
 
   // 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(t0);
   __ GetObjectType(t0, t1, t1);
   __ Branch(&miss, ne, t1, Operand(JS_FUNCTION_TYPE));
   __ sll(t0, a3, kPointerSizeLog2 - kSmiTagSize);
   __ Addu(t0, a2, Operand(t0));
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ sw(at, FieldMemOperand(t0, FixedArray::kHeaderSize));
-  // We have to update statistics for runtime profiling.
-  __ lw(t0, FieldMemOperand(a2, with_types_offset));
-  __ Subu(t0, t0, Operand(Smi::FromInt(1)));
-  __ sw(t0, FieldMemOperand(a2, with_types_offset));
-  __ lw(t0, FieldMemOperand(a2, generic_offset));
-  __ Addu(t0, t0, Operand(Smi::FromInt(1)));
-  __ sw(t0, FieldMemOperand(a2, generic_offset));
 
   __ bind(&call);
   __ Jump(masm->isolate()->builtins()->Call(convert_mode()),
           RelocInfo::CODE_TARGET, al, zero_reg, Operand(zero_reg),
           USE_DELAY_SLOT);
   __ li(a0, Operand(argc));  // In delay slot.
 
   __ bind(&uninitialized);
 
   // We are going monomorphic, provided we actually have a JSFunction.
   __ JumpIfSmi(a1, &miss);
 
   // Goto miss case if we do not have a function.
   __ GetObjectType(a1, t0, t0);
   __ Branch(&miss, ne, t0, Operand(JS_FUNCTION_TYPE));
 
   // Make sure the function is not the Array() function, which requires special
   // behavior on MISS.
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, t0);
   __ Branch(&miss, eq, a1, Operand(t0));
 
   // Make sure the function belongs to the same native context.
   __ lw(t0, FieldMemOperand(a1, JSFunction::kContextOffset));
   __ lw(t0, ContextMemOperand(t0, Context::NATIVE_CONTEXT_INDEX));
   __ lw(t1, NativeContextMemOperand());
   __ Branch(&miss, ne, t0, Operand(t1));
 
-  // Update stats.
-  __ lw(t0, FieldMemOperand(a2, with_types_offset));
-  __ Addu(t0, t0, Operand(Smi::FromInt(1)));
-  __ sw(t0, FieldMemOperand(a2, with_types_offset));
-
   // Initialize the call counter.
   __ sll(at, a3, kPointerSizeLog2 - kSmiTagSize);
   __ Addu(at, a2, Operand(at));
   __ li(t0, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
   __ sw(t0, FieldMemOperand(at, FixedArray::kHeaderSize + kPointerSize));
 
   // Store the function. Use a stub since we need a frame for allocation.
   // a2 - vector
   // a3 - slot
   // a1 - function
@@ skipping 2872 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS