X87: [stubs] Refactor the CallICStub to pass the number of arguments.

src/x87/code-stubs-x87.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_X87
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 1240 matching lines @@
 }
 
 static void IncrementCallCount(MacroAssembler* masm, Register feedback_vector,
                                Register slot) {
   __ add(FieldOperand(feedback_vector, slot, times_half_pointer_size,
                       FixedArray::kHeaderSize + kPointerSize),
          Immediate(Smi::FromInt(1)));
 }
 
 void CallICStub::HandleArrayCase(MacroAssembler* masm, Label* miss) {
+  // eax - number of arguments
   // edi - function
   // edx - slot id
   // ebx - vector
   __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, ecx);
   __ cmp(edi, ecx);
   __ j(not_equal, miss);
 
-  __ mov(eax, arg_count());
   // Reload ecx.
   __ mov(ecx, FieldOperand(ebx, edx, times_half_pointer_size,
                            FixedArray::kHeaderSize));
 
   // Increment the call count for monomorphic function calls.
   IncrementCallCount(masm, ebx, edx);
 
   __ mov(ebx, ecx);
   __ mov(edx, edi);
   ArrayConstructorStub stub(masm->isolate());
   __ TailCallStub(&stub);
 
   // Unreachable.
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
+  // edi - number of arguments
   // edi - function
   // edx - slot id
   // ebx - vector
   Isolate* isolate = masm->isolate();
   Label extra_checks_or_miss, call, call_function, call_count_incremented;
-  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.
   // AllocationSite::kTransitionInfoOffset - contains a Smi or pointer to
   // FixedArray.
   // WeakCell::kValueOffset - contains a JSFunction or Smi(0)
@@ skipping 11 matching lines @@
 
   // The compare above could have been a SMI/SMI comparison. Guard against this
   // convincing us that we have a monomorphic JSFunction.
   __ JumpIfSmi(edi, &extra_checks_or_miss);
 
   __ bind(&call_function);
 
   // Increment the call count for monomorphic function calls.
   IncrementCallCount(masm, ebx, edx);
 
-  __ Set(eax, argc);
   __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode(),
                                                     tail_call_mode()),
           RelocInfo::CODE_TARGET);
 
   __ bind(&extra_checks_or_miss);
   Label uninitialized, miss, not_allocation_site;
 
   __ cmp(ecx, Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate)));
   __ j(equal, &call);
 
@@ skipping 25 matching lines @@
       FieldOperand(ebx, edx, times_half_pointer_size, FixedArray::kHeaderSize),
       Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate)));
 
   __ bind(&call);
 
   // Increment the call count for megamorphic function calls.
   IncrementCallCount(masm, ebx, edx);
 
   __ bind(&call_count_incremented);
 
-  __ Set(eax, argc);
   __ Jump(masm->isolate()->builtins()->Call(convert_mode(), tail_call_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);
 
   // Store the function. Use a stub since we need a frame for allocation.
+  // eax - number of arguments
   // ebx - vector
   // edx - slot
   // edi - function
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     CreateWeakCellStub create_stub(isolate);
+    __ SmiTag(eax);
+    __ push(eax);
     __ push(ebx);
     __ push(edx);
     __ push(edi);
     __ push(esi);
     __ CallStub(&create_stub);
     __ pop(esi);
     __ pop(edi);
     __ pop(edx);
     __ pop(ebx);
+    __ pop(eax);
+    __ SmiUntag(eax);
   }
 
   __ jmp(&call_function);
 
   // We are here because tracing is on or we encountered a MISS case we can't
   // handle here.
   __ bind(&miss);
   GenerateMiss(masm);
 
   __ jmp(&call_count_incremented);
 
   // Unreachable
   __ int3();
 }
 
 
 void CallICStub::GenerateMiss(MacroAssembler* masm) {
   FrameScope scope(masm, StackFrame::INTERNAL);
 
+  // Preserve the number of arguments.
+  __ SmiTag(eax);
+  __ push(eax);
+
   // Push the function and feedback info.
   __ push(edi);
   __ push(ebx);
   __ push(edx);
 
   // Call the entry.
   __ CallRuntime(Runtime::kCallIC_Miss);
 
   // Move result to edi and exit the internal frame.
   __ mov(edi, eax);
+
+  // Restore number of arguments.
+  __ pop(eax);
+  __ SmiUntag(eax);
 }
 
 
 bool CEntryStub::NeedsImmovableCode() {
   return false;
 }
 
 
 void CodeStub::GenerateStubsAheadOfTime(Isolate* isolate) {
   CEntryStub::GenerateAheadOfTime(isolate);
@@ skipping 3275 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87