| // Copyright 2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "codegen-inl.h" |
| #include "compiler.h" |
| #include "debug.h" |
| #include "full-codegen.h" |
| #include "parser.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm_) |
| |
| // Generate code for a JS function. On entry to the function the receiver |
| // and arguments have been pushed on the stack left to right. The actual |
| // argument count matches the formal parameter count expected by the |
| // function. |
| // |
| // The live registers are: |
| // o r1: the JS function object being called (ie, ourselves) |
| // o cp: our context |
| // o fp: our caller's frame pointer |
| // o sp: stack pointer |
| // o lr: return address |
| // |
| // The function builds a JS frame. Please see JavaScriptFrameConstants in |
| // frames-arm.h for its layout. |
| void FullCodeGenerator::Generate(CompilationInfo* info, Mode mode) { |
| ASSERT(info_ == NULL); |
| info_ = info; |
| SetFunctionPosition(function()); |
| |
| if (mode == PRIMARY) { |
| int locals_count = scope()->num_stack_slots(); |
| |
| __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit()); |
| if (locals_count > 0) { |
| // Load undefined value here, so the value is ready for the loop |
| // below. |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| } |
| // Adjust fp to point to caller's fp. |
| __ add(fp, sp, Operand(2 * kPointerSize)); |
| |
| { Comment cmnt(masm_, "[ Allocate locals"); |
| for (int i = 0; i < locals_count; i++) { |
| __ push(ip); |
| } |
| } |
| |
| bool function_in_register = true; |
| |
| // Possibly allocate a local context. |
| if (scope()->num_heap_slots() > 0) { |
| Comment cmnt(masm_, "[ Allocate local context"); |
| // Argument to NewContext is the function, which is in r1. |
| __ push(r1); |
| __ CallRuntime(Runtime::kNewContext, 1); |
| function_in_register = false; |
| // Context is returned in both r0 and cp. It replaces the context |
| // passed to us. It's saved in the stack and kept live in cp. |
| __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // Copy any necessary parameters into the context. |
| int num_parameters = scope()->num_parameters(); |
| for (int i = 0; i < num_parameters; i++) { |
| Slot* slot = scope()->parameter(i)->slot(); |
| if (slot != NULL && slot->type() == Slot::CONTEXT) { |
| int parameter_offset = StandardFrameConstants::kCallerSPOffset + |
| (num_parameters - 1 - i) * kPointerSize; |
| // Load parameter from stack. |
| __ ldr(r0, MemOperand(fp, parameter_offset)); |
| // Store it in the context. |
| __ mov(r1, Operand(Context::SlotOffset(slot->index()))); |
| __ str(r0, MemOperand(cp, r1)); |
| // Update the write barrier. This clobbers all involved |
| // registers, so we have use a third register to avoid |
| // clobbering cp. |
| __ mov(r2, Operand(cp)); |
| __ RecordWrite(r2, r1, r0); |
| } |
| } |
| } |
| |
| Variable* arguments = scope()->arguments()->AsVariable(); |
| if (arguments != NULL) { |
| // Function uses arguments object. |
| Comment cmnt(masm_, "[ Allocate arguments object"); |
| if (!function_in_register) { |
| // Load this again, if it's used by the local context below. |
| __ ldr(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| } else { |
| __ mov(r3, r1); |
| } |
| // Receiver is just before the parameters on the caller's stack. |
| int offset = scope()->num_parameters() * kPointerSize; |
| __ add(r2, fp, |
| Operand(StandardFrameConstants::kCallerSPOffset + offset)); |
| __ mov(r1, Operand(Smi::FromInt(scope()->num_parameters()))); |
| __ stm(db_w, sp, r3.bit() | r2.bit() | r1.bit()); |
| |
| // Arguments to ArgumentsAccessStub: |
| // function, receiver address, parameter count. |
| // The stub will rewrite receiever and parameter count if the previous |
| // stack frame was an arguments adapter frame. |
| ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT); |
| __ CallStub(&stub); |
| // Duplicate the value; move-to-slot operation might clobber registers. |
| __ mov(r3, r0); |
| Move(arguments->slot(), r0, r1, r2); |
| Slot* dot_arguments_slot = |
| scope()->arguments_shadow()->AsVariable()->slot(); |
| Move(dot_arguments_slot, r3, r1, r2); |
| } |
| } |
| |
| // Check the stack for overflow or break request. |
| // Put the lr setup instruction in the delay slot. The kInstrSize is |
| // added to the implicit 8 byte offset that always applies to operations |
| // with pc and gives a return address 12 bytes down. |
| { Comment cmnt(masm_, "[ Stack check"); |
| __ LoadRoot(r2, Heap::kStackLimitRootIndex); |
| __ add(lr, pc, Operand(Assembler::kInstrSize)); |
| __ cmp(sp, Operand(r2)); |
| StackCheckStub stub; |
| __ mov(pc, |
| Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()), |
| RelocInfo::CODE_TARGET), |
| LeaveCC, |
| lo); |
| } |
| |
| { Comment cmnt(masm_, "[ Declarations"); |
| VisitDeclarations(scope()->declarations()); |
| } |
| |
| if (FLAG_trace) { |
| __ CallRuntime(Runtime::kTraceEnter, 0); |
| } |
| |
| { Comment cmnt(masm_, "[ Body"); |
| ASSERT(loop_depth() == 0); |
| VisitStatements(function()->body()); |
| ASSERT(loop_depth() == 0); |
| } |
| |
| { Comment cmnt(masm_, "[ return <undefined>;"); |
| // Emit a 'return undefined' in case control fell off the end of the |
| // body. |
| __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); |
| } |
| EmitReturnSequence(function()->end_position()); |
| } |
| |
| |
| void FullCodeGenerator::EmitReturnSequence(int position) { |
| Comment cmnt(masm_, "[ Return sequence"); |
| if (return_label_.is_bound()) { |
| __ b(&return_label_); |
| } else { |
| __ bind(&return_label_); |
| if (FLAG_trace) { |
| // Push the return value on the stack as the parameter. |
| // Runtime::TraceExit returns its parameter in r0. |
| __ push(r0); |
| __ CallRuntime(Runtime::kTraceExit, 1); |
| } |
| |
| // Add a label for checking the size of the code used for returning. |
| Label check_exit_codesize; |
| masm_->bind(&check_exit_codesize); |
| |
| // Calculate the exact length of the return sequence and make sure that |
| // the constant pool is not emitted inside of the return sequence. |
| int num_parameters = scope()->num_parameters(); |
| int32_t sp_delta = (num_parameters + 1) * kPointerSize; |
| int return_sequence_length = Assembler::kJSReturnSequenceLength; |
| if (!masm_->ImmediateFitsAddrMode1Instruction(sp_delta)) { |
| // Additional mov instruction generated. |
| return_sequence_length++; |
| } |
| masm_->BlockConstPoolFor(return_sequence_length); |
| |
| CodeGenerator::RecordPositions(masm_, position); |
| __ RecordJSReturn(); |
| __ mov(sp, fp); |
| __ ldm(ia_w, sp, fp.bit() | lr.bit()); |
| __ add(sp, sp, Operand(sp_delta)); |
| __ Jump(lr); |
| |
| // Check that the size of the code used for returning matches what is |
| // expected by the debugger. The add instruction above is an addressing |
| // mode 1 instruction where there are restrictions on which immediate values |
| // can be encoded in the instruction and which immediate values requires |
| // use of an additional instruction for moving the immediate to a temporary |
| // register. |
| ASSERT_EQ(return_sequence_length, |
| masm_->InstructionsGeneratedSince(&check_exit_codesize)); |
| } |
| } |
| |
| |
| void FullCodeGenerator::Apply(Expression::Context context, Register reg) { |
| switch (context) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| |
| case Expression::kEffect: |
| // Nothing to do. |
| break; |
| |
| case Expression::kValue: |
| // Move value into place. |
| switch (location_) { |
| case kAccumulator: |
| if (!reg.is(result_register())) __ mov(result_register(), reg); |
| break; |
| case kStack: |
| __ push(reg); |
| break; |
| } |
| break; |
| |
| case Expression::kValueTest: |
| case Expression::kTestValue: |
| // Push an extra copy of the value in case it's needed. |
| __ push(reg); |
| // Fall through. |
| |
| case Expression::kTest: |
| // We always call the runtime on ARM, so push the value as argument. |
| __ push(reg); |
| DoTest(context); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::Apply(Expression::Context context, Slot* slot) { |
| switch (context) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| case Expression::kEffect: |
| // Nothing to do. |
| break; |
| case Expression::kValue: |
| case Expression::kTest: |
| case Expression::kValueTest: |
| case Expression::kTestValue: |
| // On ARM we have to move the value into a register to do anything |
| // with it. |
| Move(result_register(), slot); |
| Apply(context, result_register()); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::Apply(Expression::Context context, Literal* lit) { |
| switch (context) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| case Expression::kEffect: |
| break; |
| // Nothing to do. |
| case Expression::kValue: |
| case Expression::kTest: |
| case Expression::kValueTest: |
| case Expression::kTestValue: |
| // On ARM we have to move the value into a register to do anything |
| // with it. |
| __ mov(result_register(), Operand(lit->handle())); |
| Apply(context, result_register()); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::ApplyTOS(Expression::Context context) { |
| switch (context) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| |
| case Expression::kEffect: |
| __ Drop(1); |
| break; |
| |
| case Expression::kValue: |
| switch (location_) { |
| case kAccumulator: |
| __ pop(result_register()); |
| break; |
| case kStack: |
| break; |
| } |
| break; |
| |
| case Expression::kValueTest: |
| case Expression::kTestValue: |
| // Duplicate the value on the stack in case it's needed. |
| __ ldr(ip, MemOperand(sp)); |
| __ push(ip); |
| // Fall through. |
| |
| case Expression::kTest: |
| DoTest(context); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::DropAndApply(int count, |
| Expression::Context context, |
| Register reg) { |
| ASSERT(count > 0); |
| ASSERT(!reg.is(sp)); |
| switch (context) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| |
| case Expression::kEffect: |
| __ Drop(count); |
| break; |
| |
| case Expression::kValue: |
| switch (location_) { |
| case kAccumulator: |
| __ Drop(count); |
| if (!reg.is(result_register())) __ mov(result_register(), reg); |
| break; |
| case kStack: |
| if (count > 1) __ Drop(count - 1); |
| __ str(reg, MemOperand(sp)); |
| break; |
| } |
| break; |
| |
| case Expression::kTest: |
| if (count > 1) __ Drop(count - 1); |
| __ str(reg, MemOperand(sp)); |
| DoTest(context); |
| break; |
| |
| case Expression::kValueTest: |
| case Expression::kTestValue: |
| if (count == 1) { |
| __ str(reg, MemOperand(sp)); |
| __ push(reg); |
| } else { // count > 1 |
| __ Drop(count - 2); |
| __ str(reg, MemOperand(sp, kPointerSize)); |
| __ str(reg, MemOperand(sp)); |
| } |
| DoTest(context); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::Apply(Expression::Context context, |
| Label* materialize_true, |
| Label* materialize_false) { |
| switch (context) { |
| case Expression::kUninitialized: |
| |
| case Expression::kEffect: |
| ASSERT_EQ(materialize_true, materialize_false); |
| __ bind(materialize_true); |
| break; |
| |
| case Expression::kValue: { |
| Label done; |
| __ bind(materialize_true); |
| __ mov(result_register(), Operand(Factory::true_value())); |
| __ jmp(&done); |
| __ bind(materialize_false); |
| __ mov(result_register(), Operand(Factory::false_value())); |
| __ bind(&done); |
| switch (location_) { |
| case kAccumulator: |
| break; |
| case kStack: |
| __ push(result_register()); |
| break; |
| } |
| break; |
| } |
| |
| case Expression::kTest: |
| break; |
| |
| case Expression::kValueTest: |
| __ bind(materialize_true); |
| __ mov(result_register(), Operand(Factory::true_value())); |
| switch (location_) { |
| case kAccumulator: |
| break; |
| case kStack: |
| __ push(result_register()); |
| break; |
| } |
| __ jmp(true_label_); |
| break; |
| |
| case Expression::kTestValue: |
| __ bind(materialize_false); |
| __ mov(result_register(), Operand(Factory::false_value())); |
| switch (location_) { |
| case kAccumulator: |
| break; |
| case kStack: |
| __ push(result_register()); |
| break; |
| } |
| __ jmp(false_label_); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::DoTest(Expression::Context context) { |
| // The value to test is pushed on the stack, and duplicated on the stack |
| // if necessary (for value/test and test/value contexts). |
| ASSERT_NE(NULL, true_label_); |
| ASSERT_NE(NULL, false_label_); |
| |
| // Call the runtime to find the boolean value of the source and then |
| // translate it into control flow to the pair of labels. |
| __ CallRuntime(Runtime::kToBool, 1); |
| __ LoadRoot(ip, Heap::kTrueValueRootIndex); |
| __ cmp(r0, ip); |
| |
| // Complete based on the context. |
| switch (context) { |
| case Expression::kUninitialized: |
| case Expression::kEffect: |
| case Expression::kValue: |
| UNREACHABLE(); |
| |
| case Expression::kTest: |
| __ b(eq, true_label_); |
| __ jmp(false_label_); |
| break; |
| |
| case Expression::kValueTest: { |
| Label discard; |
| switch (location_) { |
| case kAccumulator: |
| __ b(ne, &discard); |
| __ pop(result_register()); |
| __ jmp(true_label_); |
| break; |
| case kStack: |
| __ b(eq, true_label_); |
| break; |
| } |
| __ bind(&discard); |
| __ Drop(1); |
| __ jmp(false_label_); |
| break; |
| } |
| |
| case Expression::kTestValue: { |
| Label discard; |
| switch (location_) { |
| case kAccumulator: |
| __ b(eq, &discard); |
| __ pop(result_register()); |
| __ jmp(false_label_); |
| break; |
| case kStack: |
| __ b(ne, false_label_); |
| break; |
| } |
| __ bind(&discard); |
| __ Drop(1); |
| __ jmp(true_label_); |
| break; |
| } |
| } |
| } |
| |
| |
| MemOperand FullCodeGenerator::EmitSlotSearch(Slot* slot, Register scratch) { |
| switch (slot->type()) { |
| case Slot::PARAMETER: |
| case Slot::LOCAL: |
| return MemOperand(fp, SlotOffset(slot)); |
| case Slot::CONTEXT: { |
| int context_chain_length = |
| scope()->ContextChainLength(slot->var()->scope()); |
| __ LoadContext(scratch, context_chain_length); |
| return CodeGenerator::ContextOperand(scratch, slot->index()); |
| } |
| case Slot::LOOKUP: |
| UNREACHABLE(); |
| } |
| UNREACHABLE(); |
| return MemOperand(r0, 0); |
| } |
| |
| |
| void FullCodeGenerator::Move(Register destination, Slot* source) { |
| // Use destination as scratch. |
| MemOperand slot_operand = EmitSlotSearch(source, destination); |
| __ ldr(destination, slot_operand); |
| } |
| |
| |
| void FullCodeGenerator::Move(Slot* dst, |
| Register src, |
| Register scratch1, |
| Register scratch2) { |
| ASSERT(dst->type() != Slot::LOOKUP); // Not yet implemented. |
| ASSERT(!scratch1.is(src) && !scratch2.is(src)); |
| MemOperand location = EmitSlotSearch(dst, scratch1); |
| __ str(src, location); |
| // Emit the write barrier code if the location is in the heap. |
| if (dst->type() == Slot::CONTEXT) { |
| __ mov(scratch2, Operand(Context::SlotOffset(dst->index()))); |
| __ RecordWrite(scratch1, scratch2, src); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitDeclaration(Declaration* decl) { |
| Comment cmnt(masm_, "[ Declaration"); |
| Variable* var = decl->proxy()->var(); |
| ASSERT(var != NULL); // Must have been resolved. |
| Slot* slot = var->slot(); |
| Property* prop = var->AsProperty(); |
| |
| if (slot != NULL) { |
| switch (slot->type()) { |
| case Slot::PARAMETER: |
| case Slot::LOCAL: |
| if (decl->mode() == Variable::CONST) { |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ str(ip, MemOperand(fp, SlotOffset(slot))); |
| } else if (decl->fun() != NULL) { |
| VisitForValue(decl->fun(), kAccumulator); |
| __ str(result_register(), MemOperand(fp, SlotOffset(slot))); |
| } |
| break; |
| |
| case Slot::CONTEXT: |
| // We bypass the general EmitSlotSearch because we know more about |
| // this specific context. |
| |
| // The variable in the decl always resides in the current context. |
| ASSERT_EQ(0, scope()->ContextChainLength(var->scope())); |
| if (FLAG_debug_code) { |
| // Check if we have the correct context pointer. |
| __ ldr(r1, |
| CodeGenerator::ContextOperand(cp, Context::FCONTEXT_INDEX)); |
| __ cmp(r1, cp); |
| __ Check(eq, "Unexpected declaration in current context."); |
| } |
| if (decl->mode() == Variable::CONST) { |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ str(ip, CodeGenerator::ContextOperand(cp, slot->index())); |
| // No write barrier since the_hole_value is in old space. |
| } else if (decl->fun() != NULL) { |
| VisitForValue(decl->fun(), kAccumulator); |
| __ str(result_register(), |
| CodeGenerator::ContextOperand(cp, slot->index())); |
| int offset = Context::SlotOffset(slot->index()); |
| __ mov(r2, Operand(offset)); |
| // We know that we have written a function, which is not a smi. |
| __ mov(r1, Operand(cp)); |
| __ RecordWrite(r1, r2, result_register()); |
| } |
| break; |
| |
| case Slot::LOOKUP: { |
| __ mov(r2, Operand(var->name())); |
| // Declaration nodes are always introduced in one of two modes. |
| ASSERT(decl->mode() == Variable::VAR || |
| decl->mode() == Variable::CONST); |
| PropertyAttributes attr = |
| (decl->mode() == Variable::VAR) ? NONE : READ_ONLY; |
| __ mov(r1, Operand(Smi::FromInt(attr))); |
| // Push initial value, if any. |
| // Note: For variables we must not push an initial value (such as |
| // 'undefined') because we may have a (legal) redeclaration and we |
| // must not destroy the current value. |
| if (decl->mode() == Variable::CONST) { |
| __ LoadRoot(r0, Heap::kTheHoleValueRootIndex); |
| __ stm(db_w, sp, cp.bit() | r2.bit() | r1.bit() | r0.bit()); |
| } else if (decl->fun() != NULL) { |
| __ stm(db_w, sp, cp.bit() | r2.bit() | r1.bit()); |
| // Push initial value for function declaration. |
| VisitForValue(decl->fun(), kStack); |
| } else { |
| __ mov(r0, Operand(Smi::FromInt(0))); // No initial value! |
| __ stm(db_w, sp, cp.bit() | r2.bit() | r1.bit() | r0.bit()); |
| } |
| __ CallRuntime(Runtime::kDeclareContextSlot, 4); |
| break; |
| } |
| } |
| |
| } else if (prop != NULL) { |
| if (decl->fun() != NULL || decl->mode() == Variable::CONST) { |
| // We are declaring a function or constant that rewrites to a |
| // property. Use (keyed) IC to set the initial value. |
| VisitForValue(prop->obj(), kStack); |
| VisitForValue(prop->key(), kStack); |
| |
| if (decl->fun() != NULL) { |
| VisitForValue(decl->fun(), kAccumulator); |
| } else { |
| __ LoadRoot(result_register(), Heap::kTheHoleValueRootIndex); |
| } |
| |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| |
| // Value in r0 is ignored (declarations are statements). Receiver |
| // and key on stack are discarded. |
| __ Drop(2); |
| } |
| } |
| } |
| |
| |
| void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
| // Call the runtime to declare the globals. |
| // The context is the first argument. |
| __ mov(r1, Operand(pairs)); |
| __ mov(r0, Operand(Smi::FromInt(is_eval() ? 1 : 0))); |
| __ stm(db_w, sp, cp.bit() | r1.bit() | r0.bit()); |
| __ CallRuntime(Runtime::kDeclareGlobals, 3); |
| // Return value is ignored. |
| } |
| |
| |
| void FullCodeGenerator::VisitFunctionLiteral(FunctionLiteral* expr) { |
| Comment cmnt(masm_, "[ FunctionLiteral"); |
| |
| // Build the function boilerplate and instantiate it. |
| Handle<JSFunction> boilerplate = |
| Compiler::BuildBoilerplate(expr, script(), this); |
| if (HasStackOverflow()) return; |
| |
| ASSERT(boilerplate->IsBoilerplate()); |
| |
| // Create a new closure. |
| __ mov(r0, Operand(boilerplate)); |
| __ stm(db_w, sp, cp.bit() | r0.bit()); |
| __ CallRuntime(Runtime::kNewClosure, 2); |
| Apply(context_, r0); |
| } |
| |
| |
| void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) { |
| Comment cmnt(masm_, "[ VariableProxy"); |
| EmitVariableLoad(expr->var(), context_); |
| } |
| |
| |
| void FullCodeGenerator::EmitVariableLoad(Variable* var, |
| Expression::Context context) { |
| // Four cases: non-this global variables, lookup slots, all other |
| // types of slots, and parameters that rewrite to explicit property |
| // accesses on the arguments object. |
| Slot* slot = var->slot(); |
| Property* property = var->AsProperty(); |
| |
| if (var->is_global() && !var->is_this()) { |
| Comment cmnt(masm_, "Global variable"); |
| // Use inline caching. Variable name is passed in r2 and the global |
| // object on the stack. |
| __ ldr(ip, CodeGenerator::GlobalObject()); |
| __ push(ip); |
| __ mov(r2, Operand(var->name())); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET_CONTEXT); |
| DropAndApply(1, context, r0); |
| |
| } else if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| Comment cmnt(masm_, "Lookup slot"); |
| __ mov(r1, Operand(var->name())); |
| __ stm(db_w, sp, cp.bit() | r1.bit()); // Context and name. |
| __ CallRuntime(Runtime::kLoadContextSlot, 2); |
| Apply(context, r0); |
| |
| } else if (slot != NULL) { |
| Comment cmnt(masm_, (slot->type() == Slot::CONTEXT) |
| ? "Context slot" |
| : "Stack slot"); |
| Apply(context, slot); |
| |
| } else { |
| Comment cmnt(masm_, "Rewritten parameter"); |
| ASSERT_NOT_NULL(property); |
| // Rewritten parameter accesses are of the form "slot[literal]". |
| |
| // Assert that the object is in a slot. |
| Variable* object_var = property->obj()->AsVariableProxy()->AsVariable(); |
| ASSERT_NOT_NULL(object_var); |
| Slot* object_slot = object_var->slot(); |
| ASSERT_NOT_NULL(object_slot); |
| |
| // Load the object. |
| Move(r2, object_slot); |
| |
| // Assert that the key is a smi. |
| Literal* key_literal = property->key()->AsLiteral(); |
| ASSERT_NOT_NULL(key_literal); |
| ASSERT(key_literal->handle()->IsSmi()); |
| |
| // Load the key. |
| __ mov(r1, Operand(key_literal->handle())); |
| |
| // Push both as arguments to ic. |
| __ stm(db_w, sp, r2.bit() | r1.bit()); |
| |
| // Do a keyed property load. |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| |
| // Drop key and object left on the stack by IC, and push the result. |
| DropAndApply(2, context, r0); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) { |
| Comment cmnt(masm_, "[ RegExpLiteral"); |
| Label done; |
| // Registers will be used as follows: |
| // r4 = JS function, literals array |
| // r3 = literal index |
| // r2 = RegExp pattern |
| // r1 = RegExp flags |
| // r0 = temp + return value (RegExp literal) |
| __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ ldr(r4, FieldMemOperand(r0, JSFunction::kLiteralsOffset)); |
| int literal_offset = |
| FixedArray::kHeaderSize + expr->literal_index() * kPointerSize; |
| __ ldr(r0, FieldMemOperand(r4, literal_offset)); |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(r0, ip); |
| __ b(ne, &done); |
| __ mov(r3, Operand(Smi::FromInt(expr->literal_index()))); |
| __ mov(r2, Operand(expr->pattern())); |
| __ mov(r1, Operand(expr->flags())); |
| __ stm(db_w, sp, r4.bit() | r3.bit() | r2.bit() | r1.bit()); |
| __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4); |
| __ bind(&done); |
| Apply(context_, r0); |
| } |
| |
| |
| void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) { |
| Comment cmnt(masm_, "[ ObjectLiteral"); |
| __ ldr(r2, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ ldr(r2, FieldMemOperand(r2, JSFunction::kLiteralsOffset)); |
| __ mov(r1, Operand(Smi::FromInt(expr->literal_index()))); |
| __ mov(r0, Operand(expr->constant_properties())); |
| __ stm(db_w, sp, r2.bit() | r1.bit() | r0.bit()); |
| if (expr->depth() > 1) { |
| __ CallRuntime(Runtime::kCreateObjectLiteral, 3); |
| } else { |
| __ CallRuntime(Runtime::kCreateObjectLiteralShallow, 3); |
| } |
| |
| // If result_saved is true the result is on top of the stack. If |
| // result_saved is false the result is in r0. |
| bool result_saved = false; |
| |
| for (int i = 0; i < expr->properties()->length(); i++) { |
| ObjectLiteral::Property* property = expr->properties()->at(i); |
| if (property->IsCompileTimeValue()) continue; |
| |
| Literal* key = property->key(); |
| Expression* value = property->value(); |
| if (!result_saved) { |
| __ push(r0); // Save result on stack |
| result_saved = true; |
| } |
| switch (property->kind()) { |
| case ObjectLiteral::Property::CONSTANT: |
| UNREACHABLE(); |
| case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| ASSERT(!CompileTimeValue::IsCompileTimeValue(property->value())); |
| // Fall through. |
| case ObjectLiteral::Property::COMPUTED: |
| if (key->handle()->IsSymbol()) { |
| VisitForValue(value, kAccumulator); |
| __ mov(r2, Operand(key->handle())); |
| Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| // StoreIC leaves the receiver on the stack. |
| break; |
| } |
| // Fall through. |
| case ObjectLiteral::Property::PROTOTYPE: |
| // Duplicate receiver on stack. |
| __ ldr(r0, MemOperand(sp)); |
| __ push(r0); |
| VisitForValue(key, kStack); |
| VisitForValue(value, kStack); |
| __ CallRuntime(Runtime::kSetProperty, 3); |
| break; |
| case ObjectLiteral::Property::GETTER: |
| case ObjectLiteral::Property::SETTER: |
| // Duplicate receiver on stack. |
| __ ldr(r0, MemOperand(sp)); |
| __ push(r0); |
| VisitForValue(key, kStack); |
| __ mov(r1, Operand(property->kind() == ObjectLiteral::Property::SETTER ? |
| Smi::FromInt(1) : |
| Smi::FromInt(0))); |
| __ push(r1); |
| VisitForValue(value, kStack); |
| __ CallRuntime(Runtime::kDefineAccessor, 4); |
| break; |
| } |
| } |
| |
| if (result_saved) { |
| ApplyTOS(context_); |
| } else { |
| Apply(context_, r0); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) { |
| Comment cmnt(masm_, "[ ArrayLiteral"); |
| __ ldr(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ ldr(r3, FieldMemOperand(r3, JSFunction::kLiteralsOffset)); |
| __ mov(r2, Operand(Smi::FromInt(expr->literal_index()))); |
| __ mov(r1, Operand(expr->constant_elements())); |
| __ stm(db_w, sp, r3.bit() | r2.bit() | r1.bit()); |
| if (expr->depth() > 1) { |
| __ CallRuntime(Runtime::kCreateArrayLiteral, 3); |
| } else { |
| __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3); |
| } |
| |
| bool result_saved = false; // Is the result saved to the stack? |
| |
| // Emit code to evaluate all the non-constant subexpressions and to store |
| // them into the newly cloned array. |
| ZoneList<Expression*>* subexprs = expr->values(); |
| for (int i = 0, len = subexprs->length(); i < len; i++) { |
| Expression* subexpr = subexprs->at(i); |
| // If the subexpression is a literal or a simple materialized literal it |
| // is already set in the cloned array. |
| if (subexpr->AsLiteral() != NULL || |
| CompileTimeValue::IsCompileTimeValue(subexpr)) { |
| continue; |
| } |
| |
| if (!result_saved) { |
| __ push(r0); |
| result_saved = true; |
| } |
| VisitForValue(subexpr, kAccumulator); |
| |
| // Store the subexpression value in the array's elements. |
| __ ldr(r1, MemOperand(sp)); // Copy of array literal. |
| __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset)); |
| int offset = FixedArray::kHeaderSize + (i * kPointerSize); |
| __ str(result_register(), FieldMemOperand(r1, offset)); |
| |
| // Update the write barrier for the array store with r0 as the scratch |
| // register. |
| __ mov(r2, Operand(offset)); |
| __ RecordWrite(r1, r2, result_register()); |
| } |
| |
| if (result_saved) { |
| ApplyTOS(context_); |
| } else { |
| Apply(context_, r0); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) { |
| SetSourcePosition(prop->position()); |
| Literal* key = prop->key()->AsLiteral(); |
| __ mov(r2, Operand(key->handle())); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) { |
| SetSourcePosition(prop->position()); |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void FullCodeGenerator::EmitBinaryOp(Token::Value op, |
| Expression::Context context) { |
| __ pop(r1); |
| GenericBinaryOpStub stub(op, NO_OVERWRITE); |
| __ CallStub(&stub); |
| Apply(context, r0); |
| } |
| |
| |
| void FullCodeGenerator::EmitVariableAssignment(Variable* var, |
| Expression::Context context) { |
| // Three main cases: global variables, lookup slots, and all other |
| // types of slots. Left-hand-side parameters that rewrite to |
| // explicit property accesses do not reach here. |
| ASSERT(var != NULL); |
| ASSERT(var->is_global() || var->slot() != NULL); |
| |
| Slot* slot = var->slot(); |
| if (var->is_global()) { |
| ASSERT(!var->is_this()); |
| // Assignment to a global variable. Use inline caching for the |
| // assignment. Right-hand-side value is passed in r0, variable name in |
| // r2, and the global object on the stack. |
| __ mov(r2, Operand(var->name())); |
| __ ldr(ip, CodeGenerator::GlobalObject()); |
| __ push(ip); |
| Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| // Overwrite the global object on the stack with the result if needed. |
| DropAndApply(1, context, r0); |
| |
| } else if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| __ push(result_register()); // Value. |
| __ mov(r1, Operand(var->name())); |
| __ stm(db_w, sp, cp.bit() | r1.bit()); // Context and name. |
| __ CallRuntime(Runtime::kStoreContextSlot, 3); |
| Apply(context, r0); |
| |
| } else if (var->slot() != NULL) { |
| Slot* slot = var->slot(); |
| switch (slot->type()) { |
| case Slot::LOCAL: |
| case Slot::PARAMETER: |
| __ str(result_register(), MemOperand(fp, SlotOffset(slot))); |
| break; |
| |
| case Slot::CONTEXT: { |
| MemOperand target = EmitSlotSearch(slot, r1); |
| __ str(result_register(), target); |
| |
| // RecordWrite may destroy all its register arguments. |
| __ mov(r3, result_register()); |
| int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| |
| __ mov(r2, Operand(offset)); |
| __ RecordWrite(r1, r2, r3); |
| break; |
| } |
| |
| case Slot::LOOKUP: |
| UNREACHABLE(); |
| break; |
| } |
| Apply(context, result_register()); |
| |
| } else { |
| // Variables rewritten as properties are not treated as variables in |
| // assignments. |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) { |
| // Assignment to a property, using a named store IC. |
| Property* prop = expr->target()->AsProperty(); |
| ASSERT(prop != NULL); |
| ASSERT(prop->key()->AsLiteral() != NULL); |
| |
| // If the assignment starts a block of assignments to the same object, |
| // change to slow case to avoid the quadratic behavior of repeatedly |
| // adding fast properties. |
| if (expr->starts_initialization_block()) { |
| __ push(result_register()); |
| __ ldr(ip, MemOperand(sp, kPointerSize)); // Receiver is now under value. |
| __ push(ip); |
| __ CallRuntime(Runtime::kToSlowProperties, 1); |
| __ pop(result_register()); |
| } |
| |
| // Record source code position before IC call. |
| SetSourcePosition(expr->position()); |
| __ mov(r2, Operand(prop->key()->AsLiteral()->handle())); |
| Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| |
| // If the assignment ends an initialization block, revert to fast case. |
| if (expr->ends_initialization_block()) { |
| __ push(r0); // Result of assignment, saved even if not needed. |
| __ ldr(ip, MemOperand(sp, kPointerSize)); // Receiver is under value. |
| __ push(ip); |
| __ CallRuntime(Runtime::kToFastProperties, 1); |
| __ pop(r0); |
| } |
| |
| DropAndApply(1, context_, r0); |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) { |
| // Assignment to a property, using a keyed store IC. |
| |
| // If the assignment starts a block of assignments to the same object, |
| // change to slow case to avoid the quadratic behavior of repeatedly |
| // adding fast properties. |
| if (expr->starts_initialization_block()) { |
| __ push(result_register()); |
| // Receiver is now under the key and value. |
| __ ldr(ip, MemOperand(sp, 2 * kPointerSize)); |
| __ push(ip); |
| __ CallRuntime(Runtime::kToSlowProperties, 1); |
| __ pop(result_register()); |
| } |
| |
| // Record source code position before IC call. |
| SetSourcePosition(expr->position()); |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| |
| // If the assignment ends an initialization block, revert to fast case. |
| if (expr->ends_initialization_block()) { |
| __ push(r0); // Result of assignment, saved even if not needed. |
| // Receiver is under the key and value. |
| __ ldr(ip, MemOperand(sp, 2 * kPointerSize)); |
| __ push(ip); |
| __ CallRuntime(Runtime::kToFastProperties, 1); |
| __ pop(r0); |
| } |
| |
| // Receiver and key are still on stack. |
| DropAndApply(2, context_, r0); |
| } |
| |
| |
| void FullCodeGenerator::VisitProperty(Property* expr) { |
| Comment cmnt(masm_, "[ Property"); |
| Expression* key = expr->key(); |
| |
| // Evaluate receiver. |
| VisitForValue(expr->obj(), kStack); |
| |
| if (key->IsPropertyName()) { |
| EmitNamedPropertyLoad(expr); |
| // Drop receiver left on the stack by IC. |
| DropAndApply(1, context_, r0); |
| } else { |
| VisitForValue(expr->key(), kStack); |
| EmitKeyedPropertyLoad(expr); |
| // Drop key and receiver left on the stack by IC. |
| DropAndApply(2, context_, r0); |
| } |
| } |
| |
| void FullCodeGenerator::EmitCallWithIC(Call* expr, |
| Handle<Object> ignored, |
| RelocInfo::Mode mode) { |
| // Code common for calls using the IC. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForValue(args->at(i), kStack); |
| } |
| // Record source position for debugger. |
| SetSourcePosition(expr->position()); |
| // Call the IC initialization code. |
| Handle<Code> ic = CodeGenerator::ComputeCallInitialize(arg_count, |
| NOT_IN_LOOP); |
| __ Call(ic, mode); |
| // Restore context register. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // Discard the function left on TOS. |
| DropAndApply(1, context_, r0); |
| } |
| |
| |
| void FullCodeGenerator::EmitCallWithStub(Call* expr) { |
| // Code common for calls using the call stub. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForValue(args->at(i), kStack); |
| } |
| // Record source position for debugger. |
| SetSourcePosition(expr->position()); |
| CallFunctionStub stub(arg_count, NOT_IN_LOOP, RECEIVER_MIGHT_BE_VALUE); |
| __ CallStub(&stub); |
| // Restore context register. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // Discard the function left on TOS. |
| DropAndApply(1, context_, r0); |
| } |
| |
| |
| void FullCodeGenerator::VisitCall(Call* expr) { |
| Comment cmnt(masm_, "[ Call"); |
| Expression* fun = expr->expression(); |
| Variable* var = fun->AsVariableProxy()->AsVariable(); |
| |
| if (var != NULL && var->is_possibly_eval()) { |
| // Call to the identifier 'eval'. |
| UNREACHABLE(); |
| } else if (var != NULL && !var->is_this() && var->is_global()) { |
| // Call to a global variable. |
| __ mov(r1, Operand(var->name())); |
| // Push global object as receiver for the call IC lookup. |
| __ ldr(r0, CodeGenerator::GlobalObject()); |
| __ stm(db_w, sp, r1.bit() | r0.bit()); |
| EmitCallWithIC(expr, var->name(), RelocInfo::CODE_TARGET_CONTEXT); |
| } else if (var != NULL && var->slot() != NULL && |
| var->slot()->type() == Slot::LOOKUP) { |
| // Call to a lookup slot. |
| UNREACHABLE(); |
| } else if (fun->AsProperty() != NULL) { |
| // Call to an object property. |
| Property* prop = fun->AsProperty(); |
| Literal* key = prop->key()->AsLiteral(); |
| if (key != NULL && key->handle()->IsSymbol()) { |
| // Call to a named property, use call IC. |
| __ mov(r0, Operand(key->handle())); |
| __ push(r0); |
| VisitForValue(prop->obj(), kStack); |
| EmitCallWithIC(expr, key->handle(), RelocInfo::CODE_TARGET); |
| } else { |
| // Call to a keyed property, use keyed load IC followed by function |
| // call. |
| VisitForValue(prop->obj(), kStack); |
| VisitForValue(prop->key(), kStack); |
| // Record source code position for IC call. |
| SetSourcePosition(prop->position()); |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| // Load receiver object into r1. |
| if (prop->is_synthetic()) { |
| __ ldr(r1, CodeGenerator::GlobalObject()); |
| __ ldr(r1, FieldMemOperand(r1, GlobalObject::kGlobalReceiverOffset)); |
| } else { |
| __ ldr(r1, MemOperand(sp, kPointerSize)); |
| } |
| // Overwrite (object, key) with (function, receiver). |
| __ str(r0, MemOperand(sp, kPointerSize)); |
| __ str(r1, MemOperand(sp)); |
| EmitCallWithStub(expr); |
| } |
| } else { |
| // Call to some other expression. If the expression is an anonymous |
| // function literal not called in a loop, mark it as one that should |
| // also use the fast code generator. |
| FunctionLiteral* lit = fun->AsFunctionLiteral(); |
| if (lit != NULL && |
| lit->name()->Equals(Heap::empty_string()) && |
| loop_depth() == 0) { |
| lit->set_try_full_codegen(true); |
| } |
| VisitForValue(fun, kStack); |
| // Load global receiver object. |
| __ ldr(r1, CodeGenerator::GlobalObject()); |
| __ ldr(r1, FieldMemOperand(r1, GlobalObject::kGlobalReceiverOffset)); |
| __ push(r1); |
| // Emit function call. |
| EmitCallWithStub(expr); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitCallNew(CallNew* expr) { |
| Comment cmnt(masm_, "[ CallNew"); |
| // According to ECMA-262, section 11.2.2, page 44, the function |
| // expression in new calls must be evaluated before the |
| // arguments. |
| // Push function on the stack. |
| VisitForValue(expr->expression(), kStack); |
| |
| // Push global object (receiver). |
| __ ldr(r0, CodeGenerator::GlobalObject()); |
| __ push(r0); |
| // Push the arguments ("left-to-right") on the stack. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForValue(args->at(i), kStack); |
| } |
| |
| // Call the construct call builtin that handles allocation and |
| // constructor invocation. |
| SetSourcePosition(expr->position()); |
| |
| // Load function, arg_count into r1 and r0. |
| __ mov(r0, Operand(arg_count)); |
| // Function is in sp[arg_count + 1]. |
| __ ldr(r1, MemOperand(sp, (arg_count + 1) * kPointerSize)); |
| |
| Handle<Code> construct_builtin(Builtins::builtin(Builtins::JSConstructCall)); |
| __ Call(construct_builtin, RelocInfo::CONSTRUCT_CALL); |
| |
| // Replace function on TOS with result in r0, or pop it. |
| DropAndApply(1, context_, r0); |
| } |
| |
| |
| void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) { |
| Comment cmnt(masm_, "[ CallRuntime"); |
| ZoneList<Expression*>* args = expr->arguments(); |
| |
| if (expr->is_jsruntime()) { |
| // Prepare for calling JS runtime function. |
| __ mov(r1, Operand(expr->name())); |
| __ ldr(r0, CodeGenerator::GlobalObject()); |
| __ ldr(r0, FieldMemOperand(r0, GlobalObject::kBuiltinsOffset)); |
| __ stm(db_w, sp, r1.bit() | r0.bit()); |
| } |
| |
| // Push the arguments ("left-to-right"). |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForValue(args->at(i), kStack); |
| } |
| |
| if (expr->is_jsruntime()) { |
| // Call the JS runtime function. |
| Handle<Code> ic = CodeGenerator::ComputeCallInitialize(arg_count, |
| NOT_IN_LOOP); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| // Restore context register. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // Discard the function left on TOS. |
| DropAndApply(1, context_, r0); |
| } else { |
| // Call the C runtime function. |
| __ CallRuntime(expr->function(), arg_count); |
| Apply(context_, r0); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) { |
| switch (expr->op()) { |
| case Token::VOID: { |
| Comment cmnt(masm_, "[ UnaryOperation (VOID)"); |
| VisitForEffect(expr->expression()); |
| switch (context_) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| break; |
| case Expression::kEffect: |
| break; |
| case Expression::kValue: |
| __ LoadRoot(result_register(), Heap::kUndefinedValueRootIndex); |
| switch (location_) { |
| case kAccumulator: |
| break; |
| case kStack: |
| __ push(result_register()); |
| break; |
| } |
| break; |
| case Expression::kTestValue: |
| // Value is false so it's needed. |
| __ LoadRoot(result_register(), Heap::kUndefinedValueRootIndex); |
| switch (location_) { |
| case kAccumulator: |
| break; |
| case kStack: |
| __ push(result_register()); |
| break; |
| } |
| // Fall through. |
| case Expression::kTest: |
| case Expression::kValueTest: |
| __ jmp(false_label_); |
| break; |
| } |
| break; |
| } |
| |
| case Token::NOT: { |
| Comment cmnt(masm_, "[ UnaryOperation (NOT)"); |
| Label materialize_true, materialize_false, done; |
| // Initially assume a pure test context. Notice that the labels are |
| // swapped. |
| Label* if_true = false_label_; |
| Label* if_false = true_label_; |
| switch (context_) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| break; |
| case Expression::kEffect: |
| if_true = &done; |
| if_false = &done; |
| break; |
| case Expression::kValue: |
| if_true = &materialize_false; |
| if_false = &materialize_true; |
| break; |
| case Expression::kTest: |
| break; |
| case Expression::kValueTest: |
| if_false = &materialize_true; |
| break; |
| case Expression::kTestValue: |
| if_true = &materialize_false; |
| break; |
| } |
| VisitForControl(expr->expression(), if_true, if_false); |
| Apply(context_, if_false, if_true); // Labels swapped. |
| break; |
| } |
| |
| case Token::TYPEOF: { |
| Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)"); |
| VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| if (proxy != NULL && |
| !proxy->var()->is_this() && |
| proxy->var()->is_global()) { |
| Comment cmnt(masm_, "Global variable"); |
| __ ldr(r0, CodeGenerator::GlobalObject()); |
| __ push(r0); |
| __ mov(r2, Operand(proxy->name())); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| // Use a regular load, not a contextual load, to avoid a reference |
| // error. |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| __ str(r0, MemOperand(sp)); |
| } else if (proxy != NULL && |
| proxy->var()->slot() != NULL && |
| proxy->var()->slot()->type() == Slot::LOOKUP) { |
| __ mov(r0, Operand(proxy->name())); |
| __ stm(db_w, sp, cp.bit() | r0.bit()); |
| __ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2); |
| __ push(r0); |
| } else { |
| // This expression cannot throw a reference error at the top level. |
| VisitForValue(expr->expression(), kStack); |
| } |
| |
| __ CallRuntime(Runtime::kTypeof, 1); |
| Apply(context_, r0); |
| break; |
| } |
| |
| case Token::ADD: { |
| Comment cmt(masm_, "[ UnaryOperation (ADD)"); |
| VisitForValue(expr->expression(), kAccumulator); |
| Label no_conversion; |
| __ tst(result_register(), Operand(kSmiTagMask)); |
| __ b(eq, &no_conversion); |
| __ push(r0); |
| __ InvokeBuiltin(Builtins::TO_NUMBER, CALL_JS); |
| __ bind(&no_conversion); |
| Apply(context_, result_register()); |
| break; |
| } |
| |
| case Token::SUB: { |
| Comment cmt(masm_, "[ UnaryOperation (SUB)"); |
| bool overwrite = |
| (expr->expression()->AsBinaryOperation() != NULL && |
| expr->expression()->AsBinaryOperation()->ResultOverwriteAllowed()); |
| GenericUnaryOpStub stub(Token::SUB, overwrite); |
| // GenericUnaryOpStub expects the argument to be in the |
| // accumulator register r0. |
| VisitForValue(expr->expression(), kAccumulator); |
| __ CallStub(&stub); |
| Apply(context_, r0); |
| break; |
| } |
| |
| case Token::BIT_NOT: { |
| Comment cmt(masm_, "[ UnaryOperation (BIT_NOT)"); |
| bool overwrite = |
| (expr->expression()->AsBinaryOperation() != NULL && |
| expr->expression()->AsBinaryOperation()->ResultOverwriteAllowed()); |
| GenericUnaryOpStub stub(Token::BIT_NOT, overwrite); |
| // GenericUnaryOpStub expects the argument to be in the |
| // accumulator register r0. |
| VisitForValue(expr->expression(), kAccumulator); |
| // Avoid calling the stub for Smis. |
| Label smi, done; |
| __ tst(result_register(), Operand(kSmiTagMask)); |
| __ b(eq, &smi); |
| // Non-smi: call stub leaving result in accumulator register. |
| __ CallStub(&stub); |
| __ b(&done); |
| // Perform operation directly on Smis. |
| __ bind(&smi); |
| __ mvn(result_register(), Operand(result_register())); |
| // Bit-clear inverted smi-tag. |
| __ bic(result_register(), result_register(), Operand(kSmiTagMask)); |
| __ bind(&done); |
| Apply(context_, result_register()); |
| break; |
| } |
| |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitCountOperation(CountOperation* expr) { |
| Comment cmnt(masm_, "[ CountOperation"); |
| |
| // Expression can only be a property, a global or a (parameter or local) |
| // slot. Variables with rewrite to .arguments are treated as KEYED_PROPERTY. |
| enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY }; |
| LhsKind assign_type = VARIABLE; |
| Property* prop = expr->expression()->AsProperty(); |
| // In case of a property we use the uninitialized expression context |
| // of the key to detect a named property. |
| if (prop != NULL) { |
| assign_type = |
| (prop->key()->IsPropertyName()) ? NAMED_PROPERTY : KEYED_PROPERTY; |
| } |
| |
| // Evaluate expression and get value. |
| if (assign_type == VARIABLE) { |
| ASSERT(expr->expression()->AsVariableProxy()->var() != NULL); |
| Location saved_location = location_; |
| location_ = kAccumulator; |
| EmitVariableLoad(expr->expression()->AsVariableProxy()->var(), |
| Expression::kValue); |
| location_ = saved_location; |
| } else { |
| // Reserve space for result of postfix operation. |
| if (expr->is_postfix() && context_ != Expression::kEffect) { |
| __ mov(ip, Operand(Smi::FromInt(0))); |
| __ push(ip); |
| } |
| VisitForValue(prop->obj(), kStack); |
| if (assign_type == NAMED_PROPERTY) { |
| EmitNamedPropertyLoad(prop); |
| } else { |
| VisitForValue(prop->key(), kStack); |
| EmitKeyedPropertyLoad(prop); |
| } |
| } |
| |
| // Call ToNumber only if operand is not a smi. |
| Label no_conversion; |
| __ tst(r0, Operand(kSmiTagMask)); |
| __ b(eq, &no_conversion); |
| __ push(r0); |
| __ InvokeBuiltin(Builtins::TO_NUMBER, CALL_JS); |
| __ bind(&no_conversion); |
| |
| // Save result for postfix expressions. |
| if (expr->is_postfix()) { |
| switch (context_) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| case Expression::kEffect: |
| // Do not save result. |
| break; |
| case Expression::kValue: |
| case Expression::kTest: |
| case Expression::kValueTest: |
| case Expression::kTestValue: |
| // Save the result on the stack. If we have a named or keyed property |
| // we store the result under the receiver that is currently on top |
| // of the stack. |
| switch (assign_type) { |
| case VARIABLE: |
| __ push(r0); |
| break; |
| case NAMED_PROPERTY: |
| __ str(r0, MemOperand(sp, kPointerSize)); |
| break; |
| case KEYED_PROPERTY: |
| __ str(r0, MemOperand(sp, 2 * kPointerSize)); |
| break; |
| } |
| break; |
| } |
| } |
| |
| |
| // Inline smi case if we are in a loop. |
| Label stub_call, done; |
| if (loop_depth() > 0) { |
| __ add(r0, r0, Operand(expr->op() == Token::INC |
| ? Smi::FromInt(1) |
| : Smi::FromInt(-1))); |
| __ b(vs, &stub_call); |
| // We could eliminate this smi check if we split the code at |
| // the first smi check before calling ToNumber. |
| __ tst(r0, Operand(kSmiTagMask)); |
| __ b(eq, &done); |
| __ bind(&stub_call); |
| // Call stub. Undo operation first. |
| __ sub(r0, r0, Operand(r1)); |
| } |
| __ mov(r1, Operand(expr->op() == Token::INC |
| ? Smi::FromInt(1) |
| : Smi::FromInt(-1))); |
| GenericBinaryOpStub stub(Token::ADD, NO_OVERWRITE); |
| __ CallStub(&stub); |
| __ bind(&done); |
| |
| // Store the value returned in r0. |
| switch (assign_type) { |
| case VARIABLE: |
| if (expr->is_postfix()) { |
| EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), |
| Expression::kEffect); |
| // For all contexts except kEffect: We have the result on |
| // top of the stack. |
| if (context_ != Expression::kEffect) { |
| ApplyTOS(context_); |
| } |
| } else { |
| EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), |
| context_); |
| } |
| break; |
| case NAMED_PROPERTY: { |
| __ mov(r2, Operand(prop->key()->AsLiteral()->handle())); |
| Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| if (expr->is_postfix()) { |
| __ Drop(1); // Result is on the stack under the receiver. |
| if (context_ != Expression::kEffect) { |
| ApplyTOS(context_); |
| } |
| } else { |
| DropAndApply(1, context_, r0); |
| } |
| break; |
| } |
| case KEYED_PROPERTY: { |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize)); |
| __ Call(ic, RelocInfo::CODE_TARGET); |
| if (expr->is_postfix()) { |
| __ Drop(2); // Result is on the stack under the key and the receiver. |
| if (context_ != Expression::kEffect) { |
| ApplyTOS(context_); |
| } |
| } else { |
| DropAndApply(2, context_, r0); |
| } |
| break; |
| } |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitBinaryOperation(BinaryOperation* expr) { |
| Comment cmnt(masm_, "[ BinaryOperation"); |
| switch (expr->op()) { |
| case Token::COMMA: |
| VisitForEffect(expr->left()); |
| Visit(expr->right()); |
| break; |
| |
| case Token::OR: |
| case Token::AND: |
| EmitLogicalOperation(expr); |
| break; |
| |
| case Token::ADD: |
| case Token::SUB: |
| case Token::DIV: |
| case Token::MOD: |
| case Token::MUL: |
| case Token::BIT_OR: |
| case Token::BIT_AND: |
| case Token::BIT_XOR: |
| case Token::SHL: |
| case Token::SHR: |
| case Token::SAR: |
| VisitForValue(expr->left(), kStack); |
| VisitForValue(expr->right(), kAccumulator); |
| EmitBinaryOp(expr->op(), context_); |
| break; |
| |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) { |
| Comment cmnt(masm_, "[ CompareOperation"); |
| |
| // Always perform the comparison for its control flow. Pack the result |
| // into the expression's context after the comparison is performed. |
| Label materialize_true, materialize_false, done; |
| // Initially assume we are in a test context. |
| Label* if_true = true_label_; |
| Label* if_false = false_label_; |
| switch (context_) { |
| case Expression::kUninitialized: |
| UNREACHABLE(); |
| break; |
| case Expression::kEffect: |
| if_true = &done; |
| if_false = &done; |
| break; |
| case Expression::kValue: |
| if_true = &materialize_true; |
| if_false = &materialize_false; |
| break; |
| case Expression::kTest: |
| break; |
| case Expression::kValueTest: |
| if_true = &materialize_true; |
| break; |
| case Expression::kTestValue: |
| if_false = &materialize_false; |
| break; |
| } |
| |
| VisitForValue(expr->left(), kStack); |
| switch (expr->op()) { |
| case Token::IN: |
| VisitForValue(expr->right(), kStack); |
| __ InvokeBuiltin(Builtins::IN, CALL_JS); |
| __ LoadRoot(ip, Heap::kTrueValueRootIndex); |
| __ cmp(r0, ip); |
| __ b(eq, if_true); |
| __ jmp(if_false); |
| break; |
| |
| case Token::INSTANCEOF: { |
| VisitForValue(expr->right(), kStack); |
| InstanceofStub stub; |
| __ CallStub(&stub); |
| __ tst(r0, r0); |
| __ b(eq, if_true); // The stub returns 0 for true. |
| __ jmp(if_false); |
| break; |
| } |
| |
| default: { |
| VisitForValue(expr->right(), kAccumulator); |
| Condition cc = eq; |
| bool strict = false; |
| switch (expr->op()) { |
| case Token::EQ_STRICT: |
| strict = true; |
| // Fall through |
| case Token::EQ: |
| cc = eq; |
| __ pop(r1); |
| break; |
| case Token::LT: |
| cc = lt; |
| __ pop(r1); |
| break; |
| case Token::GT: |
| // Reverse left and right sides to obtain ECMA-262 conversion order. |
| cc = lt; |
| __ mov(r1, result_register()); |
| __ pop(r0); |
| break; |
| case Token::LTE: |
| // Reverse left and right sides to obtain ECMA-262 conversion order. |
| cc = ge; |
| __ mov(r1, result_register()); |
| __ pop(r0); |
| break; |
| case Token::GTE: |
| cc = ge; |
| __ pop(r1); |
| break; |
| case Token::IN: |
| case Token::INSTANCEOF: |
| default: |
| UNREACHABLE(); |
| } |
| |
| // The comparison stub expects the smi vs. smi case to be handled |
| // before it is called. |
| Label slow_case; |
| __ orr(r2, r0, Operand(r1)); |
| __ tst(r2, Operand(kSmiTagMask)); |
| __ b(ne, &slow_case); |
| __ cmp(r1, r0); |
| __ b(cc, if_true); |
| __ jmp(if_false); |
| |
| __ bind(&slow_case); |
| CompareStub stub(cc, strict); |
| __ CallStub(&stub); |
| __ cmp(r0, Operand(0)); |
| __ b(cc, if_true); |
| __ jmp(if_false); |
| } |
| } |
| |
| // Convert the result of the comparison into one expected for this |
| // expression's context. |
| Apply(context_, if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) { |
| __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| Apply(context_, r0); |
| } |
| |
| |
| Register FullCodeGenerator::result_register() { return r0; } |
| |
| |
| Register FullCodeGenerator::context_register() { return cp; } |
| |
| |
| void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) { |
| ASSERT_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset); |
| __ str(value, MemOperand(fp, frame_offset)); |
| } |
| |
| |
| void FullCodeGenerator::LoadContextField(Register dst, int context_index) { |
| __ ldr(dst, CodeGenerator::ContextOperand(cp, context_index)); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Non-local control flow support. |
| |
| void FullCodeGenerator::EnterFinallyBlock() { |
| ASSERT(!result_register().is(r1)); |
| // Store result register while executing finally block. |
| __ push(result_register()); |
| // Cook return address in link register to stack (smi encoded Code* delta) |
| __ sub(r1, lr, Operand(masm_->CodeObject())); |
| ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| ASSERT_EQ(0, kSmiTag); |
| __ add(r1, r1, Operand(r1)); // Convert to smi. |
| __ push(r1); |
| } |
| |
| |
| void FullCodeGenerator::ExitFinallyBlock() { |
| ASSERT(!result_register().is(r1)); |
| // Restore result register from stack. |
| __ pop(r1); |
| // Uncook return address and return. |
| __ pop(result_register()); |
| ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| __ mov(r1, Operand(r1, ASR, 1)); // Un-smi-tag value. |
| __ add(pc, r1, Operand(masm_->CodeObject())); |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
