Index: src/arm/fast-codegen-arm.cc |
=================================================================== |
--- src/arm/fast-codegen-arm.cc (revision 3660) |
+++ src/arm/fast-codegen-arm.cc (working copy) |
@@ -1,1689 +0,0 @@ |
-// 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 "fast-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(FunctionLiteral* fun) { |
- function_ = fun; |
- SetFunctionPosition(fun); |
- int locals_count = fun->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 (fun->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 = fun->scope()->num_parameters(); |
- for (int i = 0; i < num_parameters; i++) { |
- Slot* slot = fun->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 |
- __ str(r0, MemOperand(cp, Context::SlotOffset(slot->index()))); |
- } |
- } |
- } |
- |
- Variable* arguments = fun->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. |
- __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset + |
- fun->num_parameters() * kPointerSize)); |
- __ mov(r1, Operand(Smi::FromInt(fun->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 = |
- fun->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(fun->scope()->declarations()); |
- } |
- |
- if (FLAG_trace) { |
- __ CallRuntime(Runtime::kTraceEnter, 0); |
- } |
- |
- { Comment cmnt(masm_, "[ Body"); |
- ASSERT(loop_depth() == 0); |
- VisitStatements(fun->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 = function_->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 = |
- function_->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, function_->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. |
- __ RecordWrite(cp, 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) { |
- Expression* rewrite = var->rewrite(); |
- if (rewrite == NULL) { |
- ASSERT(var->is_global()); |
- 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 (rewrite->AsSlot() != NULL) { |
- Slot* slot = rewrite->AsSlot(); |
- if (FLAG_debug_code) { |
- switch (slot->type()) { |
- case Slot::PARAMETER: |
- case Slot::LOCAL: { |
- Comment cmnt(masm_, "Stack slot"); |
- break; |
- } |
- case Slot::CONTEXT: { |
- Comment cmnt(masm_, "Context slot"); |
- break; |
- } |
- case Slot::LOOKUP: |
- UNIMPLEMENTED(); |
- break; |
- } |
- } |
- Apply(context, slot); |
- } else { |
- Comment cmnt(masm_, "Variable rewritten to property"); |
- // A variable has been rewritten into an explicit access to an object |
- // property. |
- Property* property = rewrite->AsProperty(); |
- ASSERT_NOT_NULL(property); |
- |
- // The only property expressions that can occur 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) { |
- ASSERT(var != NULL); |
- ASSERT(var->is_global() || var->slot() != NULL); |
- if (var->is_global()) { |
- // 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 (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_fast_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; |
- } |
- |
- 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_ = kStack; |
- 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); |
- } |
- __ push(r0); |
- } |
- |
- // Convert to number. |
- __ InvokeBuiltin(Builtins::TO_NUMBER, CALL_JS); |
- |
- // 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; |
- } |
- } |
- |
- // Call stub for +1/-1. |
- __ mov(r1, Operand(expr->op() == Token::INC |
- ? Smi::FromInt(1) |
- : Smi::FromInt(-1))); |
- GenericBinaryOpStub stub(Token::ADD, NO_OVERWRITE); |
- __ CallStub(&stub); |
- |
- // 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 |