static const int kFastApiCallArguments = FunctionCallbackArguments::kArgsLength;
-// Reserves space for the extra arguments to API function in the
-// caller's frame.
-//
-// These arguments are set by CheckPrototypes and GenerateFastApiDirectCall.
-static void ReserveSpaceForFastApiCall(MacroAssembler* masm,
- Register scratch) {
- ASSERT(Smi::FromInt(0) == 0);
- for (int i = 0; i < kFastApiCallArguments; i++) {
- __ push(zero_reg);
- }
-}
-
-// Undoes the effects of ReserveSpaceForFastApiCall.
-static void FreeSpaceForFastApiCall(MacroAssembler* masm) {
- __ Drop(kFastApiCallArguments);
-}
-
-
-static void GenerateFastApiDirectCall(MacroAssembler* masm,
- const CallOptimization& optimization,
- int argc,
- bool restore_context) {
+static void GenerateFastApiCallBody(MacroAssembler* masm,
+ const CallOptimization& optimization,
+ int argc,
+ Register holder,
+ Register scratch1,
+ Register scratch2,
+ Register scratch3,
+ bool restore_context) {
// ----------- S t a t e -------------
- // -- sp[0] - sp[24] : FunctionCallbackInfo, incl.
- // : holder (set by CheckPrototypes)
- // -- sp[28] : last JS argument
+ // -- sp[0] : last JS argument
// -- ...
- // -- sp[(argc + 6) * 4] : first JS argument
- // -- sp[(argc + 7) * 4] : receiver
+ // -- sp[(argc - 1) * 4] : first JS argument
+ // -- sp[argc * 4] : receiver
// -----------------------------------
+ ASSERT(optimization.is_simple_api_call());
+
typedef FunctionCallbackArguments FCA;
+
+ STATIC_ASSERT(FCA::kHolderIndex == 0);
+ STATIC_ASSERT(FCA::kIsolateIndex == 1);
+ STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
+ STATIC_ASSERT(FCA::kReturnValueOffset == 3);
+ STATIC_ASSERT(FCA::kDataIndex == 4);
+ STATIC_ASSERT(FCA::kCalleeIndex == 5);
+ STATIC_ASSERT(FCA::kContextSaveIndex == 6);
+ STATIC_ASSERT(FCA::kArgsLength == 7);
+
+ ASSERT(!holder.is(cp));
+
// Save calling context.
- __ sw(cp, MemOperand(sp, FCA::kContextSaveIndex * kPointerSize));
+ __ push(cp);
// Get the function and setup the context.
Handle<JSFunction> function = optimization.constant_function();
- __ li(t1, function);
- __ lw(cp, FieldMemOperand(t1, JSFunction::kContextOffset));
- __ sw(t1, MemOperand(sp, FCA::kCalleeIndex * kPointerSize));
+ __ li(scratch1, function);
+ __ lw(cp, FieldMemOperand(scratch1, JSFunction::kContextOffset));
+ __ push(scratch1);
// Construct the FunctionCallbackInfo.
Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
Handle<Object> call_data(api_call_info->data(), masm->isolate());
+ bool call_data_undefined = false;
if (masm->isolate()->heap()->InNewSpace(*call_data)) {
- __ li(a0, api_call_info);
- __ lw(t2, FieldMemOperand(a0, CallHandlerInfo::kDataOffset));
+ __ li(scratch1, api_call_info);
+ __ lw(scratch1, FieldMemOperand(scratch1, CallHandlerInfo::kDataOffset));
+ } else if (call_data->IsUndefined()) {
+ call_data_undefined = true;
+ __ LoadRoot(scratch3, Heap::kUndefinedValueRootIndex);
} else {
- __ li(t2, call_data);
+ __ li(scratch1, call_data);
}
// Store call data.
- __ sw(t2, MemOperand(sp, FCA::kDataIndex * kPointerSize));
- // Store isolate.
- __ li(t3, Operand(ExternalReference::isolate_address(masm->isolate())));
- __ sw(t3, MemOperand(sp, FCA::kIsolateIndex * kPointerSize));
+ __ push(scratch1);
+ if (!call_data_undefined) {
+ __ LoadRoot(scratch1, Heap::kUndefinedValueRootIndex);
+ }
// Store ReturnValue default and ReturnValue.
- __ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
- __ sw(t1, MemOperand(sp, FCA::kReturnValueOffset * kPointerSize));
- __ sw(t1, MemOperand(sp, FCA::kReturnValueDefaultValueIndex * kPointerSize));
+ __ LoadRoot(scratch1, Heap::kUndefinedValueRootIndex);
+ __ Push(scratch1, scratch1);
+ // Store isolate.
+ __ li(scratch1, Operand(ExternalReference::isolate_address(masm->isolate())));
+ __ push(scratch1);
+ // Store holder.
+ __ push(holder);
// Prepare arguments.
__ Move(a2, sp);
}
+// Generates call to API function.
+static void GenerateFastApiCall(MacroAssembler* masm,
+ const CallOptimization& optimization,
+ int argc,
+ Handle<Map> map_to_holder,
+ CallOptimization::HolderLookup holder_lookup) {
+ Counters* counters = masm->isolate()->counters();
+ __ IncrementCounter(counters->call_const_fast_api(), 1, a0, a1);
+
+ // Move holder to a register.
+ Register holder_reg = a0;
+ switch (holder_lookup) {
+ case CallOptimization::kHolderIsReceiver:
+ {
+ ASSERT(map_to_holder.is_null());
+ __ lw(holder_reg, MemOperand(sp, argc * kPointerSize));
+ }
+ break;
+ case CallOptimization::kHolderIsPrototypeOfMap:
+ {
+ Handle<JSObject> holder(JSObject::cast(map_to_holder->prototype()));
+ if (!masm->isolate()->heap()->InNewSpace(*holder)) {
+ __ li(holder_reg, holder);
+ } else {
+ __ li(holder_reg, map_to_holder);
+ __ lw(holder_reg,
+ FieldMemOperand(holder_reg, Map::kPrototypeOffset));
+ }
+ }
+ break;
+ case CallOptimization::kHolderNotFound:
+ UNREACHABLE();
+ }
+ GenerateFastApiCallBody(masm,
+ optimization,
+ argc,
+ holder_reg,
+ a1,
+ a2,
+ a3,
+ false);
+}
+
+
// Generate call to api function.
static void GenerateFastApiCall(MacroAssembler* masm,
const CallOptimization& optimization,
Register scratch,
int argc,
Register* values) {
- ASSERT(optimization.is_simple_api_call());
ASSERT(!receiver.is(scratch));
-
- typedef FunctionCallbackArguments FCA;
- const int stack_space = kFastApiCallArguments + argc + 1;
- // Assign stack space for the call arguments.
- __ Subu(sp, sp, Operand(stack_space * kPointerSize));
- // Write holder to stack frame.
- __ sw(receiver, MemOperand(sp, FCA::kHolderIndex * kPointerSize));
- // Write receiver to stack frame.
- int index = stack_space - 1;
- __ sw(receiver, MemOperand(sp, index-- * kPointerSize));
+ __ push(receiver);
// Write the arguments to stack frame.
for (int i = 0; i < argc; i++) {
- ASSERT(!receiver.is(values[i]));
- ASSERT(!scratch.is(values[i]));
- __ sw(values[i], MemOperand(sp, index-- * kPointerSize));
+ Register arg = values[argc-1-i];
+ ASSERT(!receiver.is(arg));
+ ASSERT(!scratch.is(arg));
+ __ push(arg);
}
- GenerateFastApiDirectCall(masm, optimization, argc, true);
+ Register scratch1 = a0;
+ Register scratch2 = a1;
+ Register scratch3 = a2;
+ if (!a3.is(receiver)) {
+ __ mov(a3, receiver);
+ receiver = a3;
+ }
+ // Stack now matches JSFunction abi.
+ GenerateFastApiCallBody(masm,
+ optimization,
+ argc,
+ receiver,
+ scratch1,
+ scratch2,
+ scratch3,
+ true);
}
ASSERT(optimization.is_constant_call());
ASSERT(!lookup->holder()->IsGlobalObject());
Counters* counters = masm->isolate()->counters();
- int depth1 = kInvalidProtoDepth;
- int depth2 = kInvalidProtoDepth;
- bool can_do_fast_api_call = false;
- if (optimization.is_simple_api_call() &&
- !lookup->holder()->IsGlobalObject()) {
- depth1 = optimization.GetPrototypeDepthOfExpectedType(
- object, interceptor_holder);
- if (depth1 == kInvalidProtoDepth) {
- depth2 = optimization.GetPrototypeDepthOfExpectedType(
- interceptor_holder, Handle<JSObject>(lookup->holder()));
- }
- can_do_fast_api_call =
- depth1 != kInvalidProtoDepth || depth2 != kInvalidProtoDepth;
- }
-
__ IncrementCounter(counters->call_const_interceptor(), 1,
scratch1, scratch2);
- if (can_do_fast_api_call) {
- __ IncrementCounter(counters->call_const_interceptor_fast_api(), 1,
- scratch1, scratch2);
- ReserveSpaceForFastApiCall(masm, scratch1);
- }
-
// Check that the maps from receiver to interceptor's holder
// haven't changed and thus we can invoke interceptor.
Label miss_cleanup;
- Label* miss = can_do_fast_api_call ? &miss_cleanup : miss_label;
Register holder =
stub_compiler_->CheckPrototypes(
IC::CurrentTypeOf(object, masm->isolate()), receiver,
interceptor_holder, scratch1, scratch2, scratch3,
- name, depth1, miss);
+ name, miss_label);
// Invoke an interceptor and if it provides a value,
// branch to |regular_invoke|.
stub_compiler_->CheckPrototypes(
IC::CurrentTypeOf(interceptor_holder, masm->isolate()), holder,
handle(lookup->holder()), scratch1, scratch2, scratch3,
- name, depth2, miss);
- } else {
- // CheckPrototypes has a side effect of fetching a 'holder'
- // for API (object which is instanceof for the signature). It's
- // safe to omit it here, as if present, it should be fetched
- // by the previous CheckPrototypes.
- ASSERT(depth2 == kInvalidProtoDepth);
+ name, miss_label);
+ }
+
+ Handle<Map> lookup_map;
+ CallOptimization::HolderLookup holder_lookup =
+ CallOptimization::kHolderNotFound;
+ if (optimization.is_simple_api_call() &&
+ !lookup->holder()->IsGlobalObject()) {
+ lookup_map = optimization.LookupHolderOfExpectedType(
+ object, object, interceptor_holder, &holder_lookup);
+ if (holder_lookup == CallOptimization::kHolderNotFound) {
+ lookup_map =
+ optimization.LookupHolderOfExpectedType(
+ object,
+ interceptor_holder,
+ Handle<JSObject>(lookup->holder()),
+ &holder_lookup);
+ }
}
// Invoke function.
- if (can_do_fast_api_call) {
- GenerateFastApiDirectCall(
- masm, optimization, arguments_.immediate(), false);
+ if (holder_lookup != CallOptimization::kHolderNotFound) {
+ int argc = arguments_.immediate();
+ GenerateFastApiCall(masm,
+ optimization,
+ argc,
+ lookup_map,
+ holder_lookup);
} else {
Handle<JSFunction> function = optimization.constant_function();
__ Move(a0, receiver);
stub_compiler_->GenerateJumpFunction(object, function);
}
- // Deferred code for fast API call case---clean preallocated space.
- if (can_do_fast_api_call) {
- __ bind(&miss_cleanup);
- FreeSpaceForFastApiCall(masm);
- __ Branch(miss_label);
- }
-
// Invoke a regular function.
__ bind(®ular_invoke);
- if (can_do_fast_api_call) {
- FreeSpaceForFastApiCall(masm);
- }
}
void CompileRegular(MacroAssembler* masm,
Register scratch1,
Register scratch2,
Handle<Name> name,
- int save_at_depth,
Label* miss,
PrototypeCheckType check) {
Handle<Map> receiver_map(IC::TypeToMap(*type, isolate()));
Register reg = object_reg;
int depth = 0;
- typedef FunctionCallbackArguments FCA;
- if (save_at_depth == depth) {
- __ sw(reg, MemOperand(sp, FCA::kHolderIndex * kPointerSize));
- }
-
Handle<JSObject> current = Handle<JSObject>::null();
if (type->IsConstant()) current = Handle<JSObject>::cast(type->AsConstant());
Handle<JSObject> prototype = Handle<JSObject>::null();
}
}
- if (save_at_depth == depth) {
- __ sw(reg, MemOperand(sp, FCA::kHolderIndex * kPointerSize));
- }
-
// Go to the next object in the prototype chain.
current = prototype;
current_map = handle(current->map());
if (object->IsGlobalObject()) return Handle<Code>::null();
if (!cell.is_null()) return Handle<Code>::null();
if (!object->IsJSObject()) return Handle<Code>::null();
- int depth = optimization.GetPrototypeDepthOfExpectedType(
- Handle<JSObject>::cast(object), holder);
- if (depth == kInvalidProtoDepth) return Handle<Code>::null();
-
- Label miss, miss_before_stack_reserved;
+ Handle<JSObject> receiver = Handle<JSObject>::cast(object);
+ CallOptimization::HolderLookup holder_lookup =
+ CallOptimization::kHolderNotFound;
+ Handle<Map> lookup_map = optimization.LookupHolderOfExpectedType(
+ receiver, receiver, holder, &holder_lookup);
+ if (holder_lookup == CallOptimization::kHolderNotFound) {
+ return Handle<Code>::null();
+ }
- GenerateNameCheck(name, &miss_before_stack_reserved);
+ Label miss;
+ GenerateNameCheck(name, &miss);
// Get the receiver from the stack.
const int argc = arguments().immediate();
__ lw(a1, MemOperand(sp, argc * kPointerSize));
// Check that the receiver isn't a smi.
- __ JumpIfSmi(a1, &miss_before_stack_reserved);
+ __ JumpIfSmi(a1, &miss);
__ IncrementCounter(counters->call_const(), 1, a0, a3);
- __ IncrementCounter(counters->call_const_fast_api(), 1, a0, a3);
-
- ReserveSpaceForFastApiCall(masm(), a0);
// Check that the maps haven't changed and find a Holder as a side effect.
CheckPrototypes(
IC::CurrentTypeOf(object, isolate()),
- a1, holder, a0, a3, t0, name, depth, &miss);
-
- GenerateFastApiDirectCall(masm(), optimization, argc, false);
+ a1, holder, a0, a3, t0, name, &miss);
- __ bind(&miss);
- FreeSpaceForFastApiCall(masm());
+ GenerateFastApiCall(
+ masm(), optimization, argc, lookup_map, holder_lookup);
- HandlerFrontendFooter(&miss_before_stack_reserved);
+ HandlerFrontendFooter(&miss);
// Return the generated code.
return GetCode(function);
projects / platform / upstream / v8.git / commitdiff