b74daccff0
generator. The Slot::Type enumeration has four values. It should never be necessary to use a default to handle the case of a value out of range of the enumeration. Doing so silences a useful warning when one of the enumeration values is actually forgotten or when a new enumeration value is added. Review URL: http://codereview.chromium.org/521019 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3532 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
1825 lines
58 KiB
C++
1825 lines
58 KiB
C++
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "codegen-inl.h"
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#include "compiler.h"
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#include "debug.h"
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#include "fast-codegen.h"
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#include "parser.h"
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namespace v8 {
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namespace internal {
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#define __ ACCESS_MASM(masm_)
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// Generate code for a JS function. On entry to the function the receiver
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// and arguments have been pushed on the stack left to right. The actual
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// argument count matches the formal parameter count expected by the
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// function.
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//
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// The live registers are:
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// o r1: the JS function object being called (ie, ourselves)
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// o cp: our context
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// o fp: our caller's frame pointer
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// o sp: stack pointer
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// o lr: return address
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//
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// The function builds a JS frame. Please see JavaScriptFrameConstants in
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// frames-arm.h for its layout.
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void FastCodeGenerator::Generate(FunctionLiteral* fun) {
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function_ = fun;
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SetFunctionPosition(fun);
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int locals_count = fun->scope()->num_stack_slots();
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__ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
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if (locals_count > 0) {
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// Load undefined value here, so the value is ready for the loop below.
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__ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
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}
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// Adjust fp to point to caller's fp.
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__ add(fp, sp, Operand(2 * kPointerSize));
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{ Comment cmnt(masm_, "[ Allocate locals");
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for (int i = 0; i < locals_count; i++) {
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__ push(ip);
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}
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}
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bool function_in_register = true;
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// Possibly allocate a local context.
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if (fun->scope()->num_heap_slots() > 0) {
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Comment cmnt(masm_, "[ Allocate local context");
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// Argument to NewContext is the function, which is in r1.
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__ push(r1);
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__ CallRuntime(Runtime::kNewContext, 1);
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function_in_register = false;
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// Context is returned in both r0 and cp. It replaces the context
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// passed to us. It's saved in the stack and kept live in cp.
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__ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
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// Copy any necessary parameters into the context.
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int num_parameters = fun->scope()->num_parameters();
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for (int i = 0; i < num_parameters; i++) {
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Slot* slot = fun->scope()->parameter(i)->slot();
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if (slot != NULL && slot->type() == Slot::CONTEXT) {
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int parameter_offset = StandardFrameConstants::kCallerSPOffset +
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(num_parameters - 1 - i) * kPointerSize;
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// Load parameter from stack.
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__ ldr(r0, MemOperand(fp, parameter_offset));
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// Store it in the context
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__ str(r0, MemOperand(cp, Context::SlotOffset(slot->index())));
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}
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}
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}
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Variable* arguments = fun->scope()->arguments()->AsVariable();
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if (arguments != NULL) {
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// Function uses arguments object.
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Comment cmnt(masm_, "[ Allocate arguments object");
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if (!function_in_register) {
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// Load this again, if it's used by the local context below.
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__ ldr(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
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} else {
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__ mov(r3, r1);
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}
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// Receiver is just before the parameters on the caller's stack.
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__ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset +
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fun->num_parameters() * kPointerSize));
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__ mov(r1, Operand(Smi::FromInt(fun->num_parameters())));
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__ stm(db_w, sp, r3.bit() | r2.bit() | r1.bit());
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// Arguments to ArgumentsAccessStub:
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// function, receiver address, parameter count.
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// The stub will rewrite receiever and parameter count if the previous
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// stack frame was an arguments adapter frame.
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ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT);
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__ CallStub(&stub);
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// Duplicate the value; move-to-slot operation might clobber registers.
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__ mov(r3, r0);
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Move(arguments->slot(), r0, r1, r2);
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Slot* dot_arguments_slot =
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fun->scope()->arguments_shadow()->AsVariable()->slot();
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Move(dot_arguments_slot, r3, r1, r2);
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}
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// Check the stack for overflow or break request.
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// Put the lr setup instruction in the delay slot. The kInstrSize is
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// added to the implicit 8 byte offset that always applies to operations
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// with pc and gives a return address 12 bytes down.
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{ Comment cmnt(masm_, "[ Stack check");
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__ LoadRoot(r2, Heap::kStackLimitRootIndex);
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__ add(lr, pc, Operand(Assembler::kInstrSize));
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__ cmp(sp, Operand(r2));
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StackCheckStub stub;
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__ mov(pc,
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Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
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RelocInfo::CODE_TARGET),
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LeaveCC,
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lo);
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}
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{ Comment cmnt(masm_, "[ Declarations");
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VisitDeclarations(fun->scope()->declarations());
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}
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if (FLAG_trace) {
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__ CallRuntime(Runtime::kTraceEnter, 0);
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}
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{ Comment cmnt(masm_, "[ Body");
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ASSERT(loop_depth() == 0);
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VisitStatements(fun->body());
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ASSERT(loop_depth() == 0);
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}
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{ Comment cmnt(masm_, "[ return <undefined>;");
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// Emit a 'return undefined' in case control fell off the end of the
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// body.
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__ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
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}
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EmitReturnSequence(function_->end_position());
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}
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void FastCodeGenerator::EmitReturnSequence(int position) {
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Comment cmnt(masm_, "[ Return sequence");
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if (return_label_.is_bound()) {
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__ b(&return_label_);
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} else {
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__ bind(&return_label_);
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if (FLAG_trace) {
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// Push the return value on the stack as the parameter.
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// Runtime::TraceExit returns its parameter in r0.
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__ push(r0);
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__ CallRuntime(Runtime::kTraceExit, 1);
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}
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// Add a label for checking the size of the code used for returning.
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Label check_exit_codesize;
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masm_->bind(&check_exit_codesize);
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// Calculate the exact length of the return sequence and make sure that
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// the constant pool is not emitted inside of the return sequence.
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int num_parameters = function_->scope()->num_parameters();
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int32_t sp_delta = (num_parameters + 1) * kPointerSize;
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int return_sequence_length = Assembler::kJSReturnSequenceLength;
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if (!masm_->ImmediateFitsAddrMode1Instruction(sp_delta)) {
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// Additional mov instruction generated.
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return_sequence_length++;
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}
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masm_->BlockConstPoolFor(return_sequence_length);
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CodeGenerator::RecordPositions(masm_, position);
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__ RecordJSReturn();
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__ mov(sp, fp);
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__ ldm(ia_w, sp, fp.bit() | lr.bit());
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__ add(sp, sp, Operand(sp_delta));
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__ Jump(lr);
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// Check that the size of the code used for returning matches what is
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// expected by the debugger. The add instruction above is an addressing
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// mode 1 instruction where there are restrictions on which immediate values
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// can be encoded in the instruction and which immediate values requires
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// use of an additional instruction for moving the immediate to a temporary
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// register.
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ASSERT_EQ(return_sequence_length,
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masm_->InstructionsGeneratedSince(&check_exit_codesize));
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}
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}
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void FastCodeGenerator::Move(Expression::Context context, Register source) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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break;
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case Expression::kValue:
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__ push(source);
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break;
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case Expression::kTest:
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TestAndBranch(source, true_label_, false_label_);
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break;
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case Expression::kValueTest: {
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Label discard;
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__ push(source);
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TestAndBranch(source, true_label_, &discard);
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__ bind(&discard);
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__ pop();
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__ jmp(false_label_);
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break;
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}
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case Expression::kTestValue: {
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Label discard;
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__ push(source);
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TestAndBranch(source, &discard, false_label_);
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__ bind(&discard);
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__ pop();
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__ jmp(true_label_);
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}
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}
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}
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void FastCodeGenerator::MoveTOS(Expression::Context context) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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__ Drop(1);
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break;
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case Expression::kValue:
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break;
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case Expression::kTest:
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__ pop(r0);
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TestAndBranch(r0, true_label_, false_label_);
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break;
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case Expression::kValueTest: {
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Label discard;
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__ ldr(r0, MemOperand(sp, 0));
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TestAndBranch(r0, true_label_, &discard);
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__ bind(&discard);
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__ Drop(1);
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__ jmp(false_label_);
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break;
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}
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case Expression::kTestValue: {
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Label discard;
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__ ldr(r0, MemOperand(sp, 0));
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TestAndBranch(r0, &discard, false_label_);
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__ bind(&discard);
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__ Drop(1);
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__ jmp(true_label_);
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}
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}
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}
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template <>
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MemOperand FastCodeGenerator::CreateSlotOperand<MemOperand>(
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Slot* source,
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Register scratch) {
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switch (source->type()) {
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case Slot::PARAMETER:
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case Slot::LOCAL:
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return MemOperand(fp, SlotOffset(source));
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case Slot::CONTEXT: {
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int context_chain_length =
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function_->scope()->ContextChainLength(source->var()->scope());
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__ LoadContext(scratch, context_chain_length);
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return CodeGenerator::ContextOperand(scratch, source->index());
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}
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case Slot::LOOKUP:
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UNIMPLEMENTED();
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}
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UNREACHABLE();
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return MemOperand(r0, 0);
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}
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void FastCodeGenerator::Move(Register dst, Slot* source) {
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// Use dst as scratch.
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MemOperand location = CreateSlotOperand<MemOperand>(source, dst);
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__ ldr(dst, location);
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}
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void FastCodeGenerator::Move(Expression::Context context,
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Slot* source,
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Register scratch) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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break;
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case Expression::kValue:
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case Expression::kTest:
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case Expression::kValueTest:
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case Expression::kTestValue:
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Move(scratch, source);
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Move(context, scratch);
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break;
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}
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}
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void FastCodeGenerator::Move(Expression::Context context, Literal* expr) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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break;
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case Expression::kValue:
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case Expression::kTest:
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case Expression::kValueTest:
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case Expression::kTestValue:
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__ mov(ip, Operand(expr->handle()));
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Move(context, ip);
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break;
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}
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}
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void FastCodeGenerator::Move(Slot* dst,
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Register src,
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Register scratch1,
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Register scratch2) {
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switch (dst->type()) {
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case Slot::PARAMETER:
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case Slot::LOCAL:
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__ str(src, MemOperand(fp, SlotOffset(dst)));
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break;
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case Slot::CONTEXT: {
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int context_chain_length =
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function_->scope()->ContextChainLength(dst->var()->scope());
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__ LoadContext(scratch1, context_chain_length);
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int index = Context::SlotOffset(dst->index());
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__ mov(scratch2, Operand(index));
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__ str(src, MemOperand(scratch1, index));
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__ RecordWrite(scratch1, scratch2, src);
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break;
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}
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case Slot::LOOKUP:
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UNIMPLEMENTED();
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}
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}
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void FastCodeGenerator::DropAndMove(Expression::Context context,
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Register source,
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int drop_count) {
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ASSERT(drop_count > 0);
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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__ add(sp, sp, Operand(drop_count * kPointerSize));
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break;
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case Expression::kValue:
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if (drop_count > 1) {
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__ add(sp, sp, Operand((drop_count - 1) * kPointerSize));
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}
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__ str(source, MemOperand(sp));
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break;
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case Expression::kTest:
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ASSERT(!source.is(sp));
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__ add(sp, sp, Operand(drop_count * kPointerSize));
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TestAndBranch(source, true_label_, false_label_);
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break;
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case Expression::kValueTest: {
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Label discard;
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if (drop_count > 1) {
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__ add(sp, sp, Operand((drop_count - 1) * kPointerSize));
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}
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__ str(source, MemOperand(sp));
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TestAndBranch(source, true_label_, &discard);
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__ bind(&discard);
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__ pop();
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__ jmp(false_label_);
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break;
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}
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case Expression::kTestValue: {
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Label discard;
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if (drop_count > 1) {
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__ add(sp, sp, Operand((drop_count - 1) * kPointerSize));
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}
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__ str(source, MemOperand(sp));
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TestAndBranch(source, &discard, false_label_);
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__ bind(&discard);
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__ pop();
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__ jmp(true_label_);
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break;
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}
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}
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}
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void FastCodeGenerator::TestAndBranch(Register source,
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Label* true_label,
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Label* false_label) {
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ASSERT_NE(NULL, true_label);
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ASSERT_NE(NULL, false_label);
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// Call the runtime to find the boolean value of the source and then
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// translate it into control flow to the pair of labels.
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__ push(source);
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__ CallRuntime(Runtime::kToBool, 1);
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__ LoadRoot(ip, Heap::kTrueValueRootIndex);
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__ cmp(r0, ip);
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__ b(eq, true_label);
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__ jmp(false_label);
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}
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void FastCodeGenerator::VisitDeclaration(Declaration* decl) {
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Comment cmnt(masm_, "[ Declaration");
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Variable* var = decl->proxy()->var();
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ASSERT(var != NULL); // Must have been resolved.
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Slot* slot = var->slot();
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Property* prop = var->AsProperty();
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if (slot != NULL) {
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switch (slot->type()) {
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case Slot::PARAMETER:
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case Slot::LOCAL:
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if (decl->mode() == Variable::CONST) {
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__ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
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__ str(ip, MemOperand(fp, SlotOffset(var->slot())));
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} else if (decl->fun() != NULL) {
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Visit(decl->fun());
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__ pop(ip);
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__ str(ip, MemOperand(fp, SlotOffset(var->slot())));
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}
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break;
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case Slot::CONTEXT:
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// The variable in the decl always resides in the current context.
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ASSERT_EQ(0, function_->scope()->ContextChainLength(var->scope()));
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if (FLAG_debug_code) {
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// Check if we have the correct context pointer.
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__ ldr(r1,
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CodeGenerator::ContextOperand(cp, Context::FCONTEXT_INDEX));
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__ cmp(r1, cp);
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__ Check(eq, "Unexpected declaration in current context.");
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}
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if (decl->mode() == Variable::CONST) {
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__ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
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__ str(ip, CodeGenerator::ContextOperand(cp, slot->index()));
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// No write barrier since the_hole_value is in old space.
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} else if (decl->fun() != NULL) {
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Visit(decl->fun());
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__ pop(r0);
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__ str(r0, CodeGenerator::ContextOperand(cp, slot->index()));
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int offset = Context::SlotOffset(slot->index());
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__ mov(r2, Operand(offset));
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// We know that we have written a function, which is not a smi.
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__ RecordWrite(cp, r2, r0);
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}
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break;
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case Slot::LOOKUP: {
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__ mov(r2, Operand(var->name()));
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// Declaration nodes are always introduced in one of two modes.
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ASSERT(decl->mode() == Variable::VAR ||
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decl->mode() == Variable::CONST);
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PropertyAttributes attr =
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(decl->mode() == Variable::VAR) ? NONE : READ_ONLY;
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__ mov(r1, Operand(Smi::FromInt(attr)));
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// Push initial value, if any.
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// Note: For variables we must not push an initial value (such as
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// 'undefined') because we may have a (legal) redeclaration and we
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// must not destroy the current value.
|
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if (decl->mode() == Variable::CONST) {
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__ LoadRoot(r0, Heap::kTheHoleValueRootIndex);
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__ 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());
|
|
Visit(decl->fun()); // Initial value for function decl.
|
|
} 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.
|
|
ASSERT_EQ(Expression::kValue, prop->obj()->context());
|
|
Visit(prop->obj());
|
|
ASSERT_EQ(Expression::kValue, prop->key()->context());
|
|
Visit(prop->key());
|
|
|
|
if (decl->fun() != NULL) {
|
|
ASSERT_EQ(Expression::kValue, decl->fun()->context());
|
|
Visit(decl->fun());
|
|
__ pop(r0);
|
|
} else {
|
|
__ LoadRoot(r0, 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.
|
|
__ add(sp, sp, Operand(2 * kPointerSize));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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 FastCodeGenerator::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);
|
|
Move(expr->context(), r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
|
|
Comment cmnt(masm_, "[ VariableProxy");
|
|
EmitVariableLoad(expr->var(), expr->context());
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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);
|
|
DropAndMove(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;
|
|
}
|
|
}
|
|
Move(context, slot, r0);
|
|
} else {
|
|
// A variable has been rewritten into an explicit access to
|
|
// an object property.
|
|
Property* property = rewrite->AsProperty();
|
|
ASSERT_NOT_NULL(property);
|
|
|
|
// Currently the only parameter expressions that can occur are
|
|
// on the form "slot[literal]".
|
|
|
|
// Check 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);
|
|
|
|
// Check 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.
|
|
DropAndMove(context, r0, 2);
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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);
|
|
Move(expr->context(), r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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 == true: The result is saved on top of the
|
|
// stack and in r0.
|
|
// If result_saved == false: The result not on the stack, just 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: // Fall through.
|
|
ASSERT(!CompileTimeValue::IsCompileTimeValue(property->value()));
|
|
case ObjectLiteral::Property::COMPUTED:
|
|
if (key->handle()->IsSymbol()) {
|
|
Visit(value);
|
|
ASSERT_EQ(Expression::kValue, value->context());
|
|
__ pop(r0);
|
|
__ 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.
|
|
__ ldr(r0, MemOperand(sp)); // Restore result into r0.
|
|
break;
|
|
}
|
|
// Fall through.
|
|
|
|
case ObjectLiteral::Property::PROTOTYPE:
|
|
__ push(r0);
|
|
Visit(key);
|
|
ASSERT_EQ(Expression::kValue, key->context());
|
|
Visit(value);
|
|
ASSERT_EQ(Expression::kValue, value->context());
|
|
__ CallRuntime(Runtime::kSetProperty, 3);
|
|
__ ldr(r0, MemOperand(sp)); // Restore result into r0.
|
|
break;
|
|
|
|
case ObjectLiteral::Property::GETTER:
|
|
case ObjectLiteral::Property::SETTER:
|
|
__ push(r0);
|
|
Visit(key);
|
|
ASSERT_EQ(Expression::kValue, key->context());
|
|
__ mov(r1, Operand(property->kind() == ObjectLiteral::Property::SETTER ?
|
|
Smi::FromInt(1) :
|
|
Smi::FromInt(0)));
|
|
__ push(r1);
|
|
Visit(value);
|
|
ASSERT_EQ(Expression::kValue, value->context());
|
|
__ CallRuntime(Runtime::kDefineAccessor, 4);
|
|
__ ldr(r0, MemOperand(sp)); // Restore result into r0
|
|
break;
|
|
}
|
|
}
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect:
|
|
if (result_saved) __ pop();
|
|
break;
|
|
case Expression::kValue:
|
|
if (!result_saved) __ push(r0);
|
|
break;
|
|
case Expression::kTest:
|
|
if (result_saved) __ pop(r0);
|
|
TestAndBranch(r0, true_label_, false_label_);
|
|
break;
|
|
case Expression::kValueTest: {
|
|
Label discard;
|
|
if (!result_saved) __ push(r0);
|
|
TestAndBranch(r0, true_label_, &discard);
|
|
__ bind(&discard);
|
|
__ pop();
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
case Expression::kTestValue: {
|
|
Label discard;
|
|
if (!result_saved) __ push(r0);
|
|
TestAndBranch(r0, &discard, false_label_);
|
|
__ bind(&discard);
|
|
__ pop();
|
|
__ jmp(true_label_);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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;
|
|
}
|
|
Visit(subexpr);
|
|
ASSERT_EQ(Expression::kValue, subexpr->context());
|
|
|
|
// Store the subexpression value in the array's elements.
|
|
__ pop(r0); // Subexpression value.
|
|
__ ldr(r1, MemOperand(sp)); // Copy of array literal.
|
|
__ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset));
|
|
int offset = FixedArray::kHeaderSize + (i * kPointerSize);
|
|
__ str(r0, FieldMemOperand(r1, offset));
|
|
|
|
// Update the write barrier for the array store with r0 as the scratch
|
|
// register.
|
|
__ mov(r2, Operand(offset));
|
|
__ RecordWrite(r1, r2, r0);
|
|
}
|
|
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect:
|
|
if (result_saved) __ pop();
|
|
break;
|
|
case Expression::kValue:
|
|
if (!result_saved) __ push(r0);
|
|
break;
|
|
case Expression::kTest:
|
|
if (result_saved) __ pop(r0);
|
|
TestAndBranch(r0, true_label_, false_label_);
|
|
break;
|
|
case Expression::kValueTest: {
|
|
Label discard;
|
|
if (!result_saved) __ push(r0);
|
|
TestAndBranch(r0, true_label_, &discard);
|
|
__ bind(&discard);
|
|
__ pop();
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
case Expression::kTestValue: {
|
|
Label discard;
|
|
if (!result_saved) __ push(r0);
|
|
TestAndBranch(r0, &discard, false_label_);
|
|
__ bind(&discard);
|
|
__ pop();
|
|
__ jmp(true_label_);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::EmitNamedPropertyLoad(Property* prop,
|
|
Expression::Context context) {
|
|
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);
|
|
Move(context, r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::EmitKeyedPropertyLoad(Property* prop,
|
|
Expression::Context context) {
|
|
SetSourcePosition(prop->position());
|
|
Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
|
|
__ Call(ic, RelocInfo::CODE_TARGET);
|
|
Move(context, r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::EmitCompoundAssignmentOp(Token::Value op,
|
|
Expression::Context context) {
|
|
__ pop(r0);
|
|
__ pop(r1);
|
|
GenericBinaryOpStub stub(op,
|
|
NO_OVERWRITE);
|
|
__ CallStub(&stub);
|
|
Move(context, r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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.
|
|
__ pop(r0);
|
|
__ 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.
|
|
DropAndMove(context, r0);
|
|
|
|
} else if (var->slot()) {
|
|
Slot* slot = var->slot();
|
|
ASSERT_NOT_NULL(slot); // Variables rewritten as properties not handled.
|
|
switch (slot->type()) {
|
|
case Slot::LOCAL:
|
|
case Slot::PARAMETER: {
|
|
switch (context) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect:
|
|
// Perform assignment and discard value.
|
|
__ pop(r0);
|
|
__ str(r0, MemOperand(fp, SlotOffset(var->slot())));
|
|
break;
|
|
case Expression::kValue:
|
|
// Perform assignment and preserve value.
|
|
__ ldr(r0, MemOperand(sp));
|
|
__ str(r0, MemOperand(fp, SlotOffset(var->slot())));
|
|
break;
|
|
case Expression::kTest:
|
|
// Perform assignment and test (and discard) value.
|
|
__ pop(r0);
|
|
__ str(r0, MemOperand(fp, SlotOffset(var->slot())));
|
|
TestAndBranch(r0, true_label_, false_label_);
|
|
break;
|
|
case Expression::kValueTest: {
|
|
Label discard;
|
|
__ ldr(r0, MemOperand(sp));
|
|
__ str(r0, MemOperand(fp, SlotOffset(var->slot())));
|
|
TestAndBranch(r0, true_label_, &discard);
|
|
__ bind(&discard);
|
|
__ pop();
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
case Expression::kTestValue: {
|
|
Label discard;
|
|
__ ldr(r0, MemOperand(sp));
|
|
__ str(r0, MemOperand(fp, SlotOffset(var->slot())));
|
|
TestAndBranch(r0, &discard, false_label_);
|
|
__ bind(&discard);
|
|
__ pop();
|
|
__ jmp(true_label_);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Slot::CONTEXT: {
|
|
int chain_length =
|
|
function_->scope()->ContextChainLength(slot->var()->scope());
|
|
if (chain_length > 0) {
|
|
// Move up the chain of contexts to the context containing the slot.
|
|
__ ldr(r0, CodeGenerator::ContextOperand(cp, Context::CLOSURE_INDEX));
|
|
// Load the function context (which is the incoming, outer context).
|
|
__ ldr(r0, FieldMemOperand(r0, JSFunction::kContextOffset));
|
|
for (int i = 1; i < chain_length; i++) {
|
|
__ ldr(r0,
|
|
CodeGenerator::ContextOperand(r0, Context::CLOSURE_INDEX));
|
|
__ ldr(r0, FieldMemOperand(r0, JSFunction::kContextOffset));
|
|
}
|
|
} else { // Slot is in the current context. Generate optimized code.
|
|
__ mov(r0, cp);
|
|
}
|
|
// The context may be an intermediate context, not a function context.
|
|
__ ldr(r0, CodeGenerator::ContextOperand(r0, Context::FCONTEXT_INDEX));
|
|
__ pop(r1);
|
|
__ str(r1, CodeGenerator::ContextOperand(r0, slot->index()));
|
|
|
|
// RecordWrite may destroy all its register arguments.
|
|
if (context == Expression::kValue) {
|
|
__ push(r1);
|
|
} else if (context != Expression::kEffect) {
|
|
__ mov(r3, r1);
|
|
}
|
|
int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize;
|
|
|
|
// Update the write barrier for the array store with r0 as the scratch
|
|
// register. Skip the write barrier if the value written (r1) is a smi.
|
|
// The smi test is part of RecordWrite on other platforms, not on arm.
|
|
Label exit;
|
|
__ tst(r1, Operand(kSmiTagMask));
|
|
__ b(eq, &exit);
|
|
|
|
__ mov(r2, Operand(offset));
|
|
__ RecordWrite(r0, r2, r1);
|
|
__ bind(&exit);
|
|
if (context != Expression::kEffect &&
|
|
context != Expression::kValue) {
|
|
Move(context, r3);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Slot::LOOKUP:
|
|
UNREACHABLE();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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()) {
|
|
__ ldr(ip, MemOperand(sp, kPointerSize)); // Receiver is under value.
|
|
__ push(ip);
|
|
__ CallRuntime(Runtime::kToSlowProperties, 1);
|
|
}
|
|
|
|
__ pop(r0);
|
|
__ 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);
|
|
}
|
|
|
|
DropAndMove(expr->context(), r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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()) {
|
|
// Receiver is under the key and value.
|
|
__ ldr(ip, MemOperand(sp, 2 * kPointerSize));
|
|
__ push(ip);
|
|
__ CallRuntime(Runtime::kToSlowProperties, 1);
|
|
}
|
|
|
|
__ pop(r0);
|
|
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.
|
|
// Reciever 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.
|
|
__ add(sp, sp, Operand(2 * kPointerSize));
|
|
Move(expr->context(), r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitProperty(Property* expr) {
|
|
Comment cmnt(masm_, "[ Property");
|
|
Expression* key = expr->key();
|
|
uint32_t dummy;
|
|
|
|
// Record the source position for the property load.
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Evaluate receiver.
|
|
Visit(expr->obj());
|
|
|
|
if (key->AsLiteral() != NULL && key->AsLiteral()->handle()->IsSymbol() &&
|
|
!String::cast(*(key->AsLiteral()->handle()))->AsArrayIndex(&dummy)) {
|
|
// Do a NAMED property load.
|
|
// The IC expects the property name in r2 and the receiver on the stack.
|
|
__ mov(r2, Operand(key->AsLiteral()->handle()));
|
|
Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
|
|
__ Call(ic, RelocInfo::CODE_TARGET);
|
|
} else {
|
|
// Do a KEYED property load.
|
|
Visit(expr->key());
|
|
Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
|
|
__ Call(ic, RelocInfo::CODE_TARGET);
|
|
// Drop key and receiver left on the stack by IC.
|
|
__ pop();
|
|
}
|
|
DropAndMove(expr->context(), r0);
|
|
}
|
|
|
|
void FastCodeGenerator::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++) {
|
|
Visit(args->at(i));
|
|
ASSERT_EQ(Expression::kValue, args->at(i)->context());
|
|
}
|
|
// 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.
|
|
DropAndMove(expr->context(), r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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++) {
|
|
Visit(args->at(i));
|
|
}
|
|
// Record source position for debugger.
|
|
SetSourcePosition(expr->position());
|
|
CallFunctionStub stub(arg_count, NOT_IN_LOOP);
|
|
__ CallStub(&stub);
|
|
// Restore context register.
|
|
__ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
|
|
// Discard the function left on TOS.
|
|
DropAndMove(expr->context(), r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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);
|
|
Visit(prop->obj());
|
|
EmitCallWithIC(expr, key->handle(), RelocInfo::CODE_TARGET);
|
|
} else {
|
|
// Call to a keyed property, use keyed load IC followed by function
|
|
// call.
|
|
Visit(prop->obj());
|
|
Visit(prop->key());
|
|
// 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());
|
|
} 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);
|
|
}
|
|
Visit(fun);
|
|
// Load global receiver object.
|
|
__ ldr(r1, CodeGenerator::GlobalObject());
|
|
__ ldr(r1, FieldMemOperand(r1, GlobalObject::kGlobalReceiverOffset));
|
|
__ push(r1);
|
|
// Emit function call.
|
|
EmitCallWithStub(expr);
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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.
|
|
Visit(expr->expression());
|
|
ASSERT_EQ(Expression::kValue, expr->expression()->context());
|
|
|
|
// 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++) {
|
|
Visit(args->at(i));
|
|
ASSERT_EQ(Expression::kValue, args->at(i)->context());
|
|
// If location is value, it is already on the stack,
|
|
// so nothing to do here.
|
|
}
|
|
|
|
// 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.
|
|
DropAndMove(expr->context(), r0);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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++) {
|
|
Visit(args->at(i));
|
|
ASSERT_EQ(Expression::kValue, args->at(i)->context());
|
|
}
|
|
|
|
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.
|
|
DropAndMove(expr->context(), r0);
|
|
} else {
|
|
// Call the C runtime function.
|
|
__ CallRuntime(expr->function(), arg_count);
|
|
Move(expr->context(), r0);
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
|
|
switch (expr->op()) {
|
|
case Token::VOID: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (VOID)");
|
|
Visit(expr->expression());
|
|
ASSERT_EQ(Expression::kEffect, expr->expression()->context());
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
case Expression::kEffect:
|
|
break;
|
|
case Expression::kValue:
|
|
__ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
|
|
__ push(ip);
|
|
break;
|
|
case Expression::kTestValue:
|
|
// Value is false so it's needed.
|
|
__ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
|
|
__ push(ip);
|
|
case Expression::kTest:
|
|
case Expression::kValueTest:
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Token::NOT: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (NOT)");
|
|
ASSERT_EQ(Expression::kTest, expr->expression()->context());
|
|
|
|
Label push_true;
|
|
Label push_false;
|
|
Label done;
|
|
Label* saved_true = true_label_;
|
|
Label* saved_false = false_label_;
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
|
|
case Expression::kValue:
|
|
true_label_ = &push_false;
|
|
false_label_ = &push_true;
|
|
Visit(expr->expression());
|
|
__ bind(&push_true);
|
|
__ LoadRoot(ip, Heap::kTrueValueRootIndex);
|
|
__ push(ip);
|
|
__ jmp(&done);
|
|
__ bind(&push_false);
|
|
__ LoadRoot(ip, Heap::kFalseValueRootIndex);
|
|
__ push(ip);
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kEffect:
|
|
true_label_ = &done;
|
|
false_label_ = &done;
|
|
Visit(expr->expression());
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kTest:
|
|
true_label_ = saved_false;
|
|
false_label_ = saved_true;
|
|
Visit(expr->expression());
|
|
break;
|
|
|
|
case Expression::kValueTest:
|
|
true_label_ = saved_false;
|
|
false_label_ = &push_true;
|
|
Visit(expr->expression());
|
|
__ bind(&push_true);
|
|
__ LoadRoot(ip, Heap::kTrueValueRootIndex);
|
|
__ push(ip);
|
|
__ jmp(saved_true);
|
|
break;
|
|
|
|
case Expression::kTestValue:
|
|
true_label_ = &push_false;
|
|
false_label_ = saved_true;
|
|
Visit(expr->expression());
|
|
__ bind(&push_false);
|
|
__ LoadRoot(ip, Heap::kFalseValueRootIndex);
|
|
__ push(ip);
|
|
__ jmp(saved_false);
|
|
break;
|
|
}
|
|
true_label_ = saved_true;
|
|
false_label_ = saved_false;
|
|
break;
|
|
}
|
|
|
|
case Token::TYPEOF: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
|
|
ASSERT_EQ(Expression::kValue, expr->expression()->context());
|
|
|
|
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.
|
|
Visit(expr->expression());
|
|
}
|
|
|
|
__ CallRuntime(Runtime::kTypeof, 1);
|
|
Move(expr->context(), r0);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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()->context() == Expression::kUninitialized)
|
|
? NAMED_PROPERTY
|
|
: KEYED_PROPERTY;
|
|
}
|
|
|
|
// Evaluate expression and get value.
|
|
if (assign_type == VARIABLE) {
|
|
ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
|
|
EmitVariableLoad(expr->expression()->AsVariableProxy()->var(),
|
|
Expression::kValue);
|
|
} else {
|
|
// Reserve space for result of postfix operation.
|
|
if (expr->is_postfix() && expr->context() != Expression::kEffect) {
|
|
ASSERT(expr->context() != Expression::kUninitialized);
|
|
__ mov(ip, Operand(Smi::FromInt(0)));
|
|
__ push(ip);
|
|
}
|
|
Visit(prop->obj());
|
|
ASSERT_EQ(Expression::kValue, prop->obj()->context());
|
|
if (assign_type == NAMED_PROPERTY) {
|
|
EmitNamedPropertyLoad(prop, Expression::kValue);
|
|
} else {
|
|
Visit(prop->key());
|
|
ASSERT_EQ(Expression::kValue, prop->key()->context());
|
|
EmitKeyedPropertyLoad(prop, Expression::kValue);
|
|
}
|
|
}
|
|
|
|
// Convert to number.
|
|
__ InvokeBuiltin(Builtins::TO_NUMBER, CALL_JS);
|
|
|
|
// Save result for postfix expressions.
|
|
if (expr->is_postfix()) {
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect:
|
|
// Do not save result.
|
|
break;
|
|
case Expression::kValue:
|
|
case Expression::kTest:
|
|
case Expression::kTestValue:
|
|
case Expression::kValueTest:
|
|
// 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 runtime for +1/-1.
|
|
if (expr->op() == Token::INC) {
|
|
__ mov(ip, Operand(Smi::FromInt(1)));
|
|
} else {
|
|
__ mov(ip, Operand(Smi::FromInt(-1)));
|
|
}
|
|
__ stm(db_w, sp, ip.bit() | r0.bit());
|
|
__ CallRuntime(Runtime::kNumberAdd, 2);
|
|
|
|
// Store the value returned in r0.
|
|
switch (assign_type) {
|
|
case VARIABLE:
|
|
__ push(r0);
|
|
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 (expr->context() != Expression::kEffect) {
|
|
MoveTOS(expr->context());
|
|
}
|
|
} else {
|
|
EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),
|
|
expr->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 (expr->context() != Expression::kEffect) {
|
|
MoveTOS(expr->context());
|
|
}
|
|
} else {
|
|
DropAndMove(expr->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 (expr->context() != Expression::kEffect) {
|
|
MoveTOS(expr->context());
|
|
}
|
|
} else {
|
|
DropAndMove(expr->context(), r0, 2);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitBinaryOperation(BinaryOperation* expr) {
|
|
Comment cmnt(masm_, "[ BinaryOperation");
|
|
switch (expr->op()) {
|
|
case Token::COMMA:
|
|
ASSERT_EQ(Expression::kEffect, expr->left()->context());
|
|
ASSERT_EQ(expr->context(), expr->right()->context());
|
|
Visit(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: {
|
|
ASSERT_EQ(Expression::kValue, expr->left()->context());
|
|
ASSERT_EQ(Expression::kValue, expr->right()->context());
|
|
|
|
Visit(expr->left());
|
|
Visit(expr->right());
|
|
__ pop(r0);
|
|
__ pop(r1);
|
|
GenericBinaryOpStub stub(expr->op(),
|
|
NO_OVERWRITE);
|
|
__ CallStub(&stub);
|
|
Move(expr->context(), r0);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
|
|
Comment cmnt(masm_, "[ CompareOperation");
|
|
ASSERT_EQ(Expression::kValue, expr->left()->context());
|
|
ASSERT_EQ(Expression::kValue, expr->right()->context());
|
|
Visit(expr->left());
|
|
Visit(expr->right());
|
|
|
|
// Convert current context to test context: Pre-test code.
|
|
Label push_true;
|
|
Label push_false;
|
|
Label done;
|
|
Label* saved_true = true_label_;
|
|
Label* saved_false = false_label_;
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
|
|
case Expression::kValue:
|
|
true_label_ = &push_true;
|
|
false_label_ = &push_false;
|
|
break;
|
|
|
|
case Expression::kEffect:
|
|
true_label_ = &done;
|
|
false_label_ = &done;
|
|
break;
|
|
|
|
case Expression::kTest:
|
|
break;
|
|
|
|
case Expression::kValueTest:
|
|
true_label_ = &push_true;
|
|
break;
|
|
|
|
case Expression::kTestValue:
|
|
false_label_ = &push_false;
|
|
break;
|
|
}
|
|
// Convert current context to test context: End pre-test code.
|
|
|
|
switch (expr->op()) {
|
|
case Token::IN: {
|
|
__ InvokeBuiltin(Builtins::IN, CALL_JS);
|
|
__ LoadRoot(ip, Heap::kTrueValueRootIndex);
|
|
__ cmp(r0, ip);
|
|
__ b(eq, true_label_);
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
|
|
case Token::INSTANCEOF: {
|
|
InstanceofStub stub;
|
|
__ CallStub(&stub);
|
|
__ tst(r0, r0);
|
|
__ b(eq, true_label_); // The stub returns 0 for true.
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
|
|
default: {
|
|
Condition cc = eq;
|
|
bool strict = false;
|
|
switch (expr->op()) {
|
|
case Token::EQ_STRICT:
|
|
strict = true;
|
|
// Fall through
|
|
case Token::EQ:
|
|
cc = eq;
|
|
__ pop(r0);
|
|
__ pop(r1);
|
|
break;
|
|
case Token::LT:
|
|
cc = lt;
|
|
__ pop(r0);
|
|
__ pop(r1);
|
|
break;
|
|
case Token::GT:
|
|
// Reverse left and right sizes to obtain ECMA-262 conversion order.
|
|
cc = lt;
|
|
__ pop(r1);
|
|
__ pop(r0);
|
|
break;
|
|
case Token::LTE:
|
|
// Reverse left and right sizes to obtain ECMA-262 conversion order.
|
|
cc = ge;
|
|
__ pop(r1);
|
|
__ pop(r0);
|
|
break;
|
|
case Token::GTE:
|
|
cc = ge;
|
|
__ pop(r0);
|
|
__ 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, true_label_);
|
|
__ jmp(false_label_);
|
|
|
|
__ bind(&slow_case);
|
|
CompareStub stub(cc, strict);
|
|
__ CallStub(&stub);
|
|
__ tst(r0, r0);
|
|
__ b(cc, true_label_);
|
|
__ jmp(false_label_);
|
|
}
|
|
}
|
|
|
|
// Convert current context to test context: Post-test code.
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
|
|
case Expression::kValue:
|
|
__ bind(&push_true);
|
|
__ LoadRoot(ip, Heap::kTrueValueRootIndex);
|
|
__ push(ip);
|
|
__ jmp(&done);
|
|
__ bind(&push_false);
|
|
__ LoadRoot(ip, Heap::kFalseValueRootIndex);
|
|
__ push(ip);
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kEffect:
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kTest:
|
|
break;
|
|
|
|
case Expression::kValueTest:
|
|
__ bind(&push_true);
|
|
__ LoadRoot(ip, Heap::kTrueValueRootIndex);
|
|
__ push(ip);
|
|
__ jmp(saved_true);
|
|
break;
|
|
|
|
case Expression::kTestValue:
|
|
__ bind(&push_false);
|
|
__ LoadRoot(ip, Heap::kFalseValueRootIndex);
|
|
__ push(ip);
|
|
__ jmp(saved_false);
|
|
break;
|
|
}
|
|
true_label_ = saved_true;
|
|
false_label_ = saved_false;
|
|
// Convert current context to test context: End post-test code.
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
|
|
__ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
|
|
Move(expr->context(), r0);
|
|
}
|
|
|
|
|
|
Register FastCodeGenerator::result_register() { return r0; }
|
|
|
|
|
|
Register FastCodeGenerator::context_register() { return cp; }
|
|
|
|
|
|
void FastCodeGenerator::StoreToFrameField(int frame_offset, Register value) {
|
|
ASSERT_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset);
|
|
__ str(value, MemOperand(fp, frame_offset));
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::LoadContextField(Register dst, int context_index) {
|
|
__ ldr(dst, CodeGenerator::ContextOperand(cp, context_index));
|
|
}
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Non-local control flow support.
|
|
|
|
void FastCodeGenerator::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 FastCodeGenerator::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
|