v8/src/fast-codegen.cc

// 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 "fast-codegen.h"

namespace v8 {
namespace internal {

Handle<Code> FastCodeGenerator::MakeCode(FunctionLiteral* fun,
                                         Handle<Script> script) {
  CodeGenerator::MakeCodePrologue(fun);
  const int kInitialBufferSize = 4 * KB;
  MacroAssembler masm(NULL, kInitialBufferSize);
  FastCodeGenerator cgen(&masm);
  cgen.Generate(fun);
  if (cgen.HasStackOverflow()) {
    ASSERT(!Top::has_pending_exception());
    return Handle<Code>::null();
  }
  Code::Flags flags = Code::ComputeFlags(Code::FUNCTION, NOT_IN_LOOP);
  return CodeGenerator::MakeCodeEpilogue(fun, &masm, flags, script);
}


int FastCodeGenerator::SlotOffset(Slot* slot) {
  // Offset is negative because higher indexes are at lower addresses.
  int offset = -slot->index() * kPointerSize;
  // Adjust by a (parameter or local) base offset.
  switch (slot->type()) {
    case Slot::PARAMETER:
      offset += (function_->scope()->num_parameters() + 1) * kPointerSize;
      break;
    case Slot::LOCAL:
      offset += JavaScriptFrameConstants::kLocal0Offset;
      break;
    default:
      UNREACHABLE();
  }
  return offset;
}

void FastCodeGenerator::SetFunctionPosition(FunctionLiteral* fun) {
  if (FLAG_debug_info) {
    CodeGenerator::RecordPositions(masm_, fun->start_position());
  }
}


void FastCodeGenerator::SetReturnPosition(FunctionLiteral* fun) {
  if (FLAG_debug_info) {
    CodeGenerator::RecordPositions(masm_, fun->end_position());
  }
}


void FastCodeGenerator::SetStatementPosition(Statement* stmt) {
  if (FLAG_debug_info) {
    CodeGenerator::RecordPositions(masm_, stmt->statement_pos());
  }
}


void FastCodeGenerator::SetSourcePosition(int pos) {
  if (FLAG_debug_info && pos != RelocInfo::kNoPosition) {
    masm_->RecordPosition(pos);
  }
}


void FastCodeGenerator::VisitDeclaration(Declaration* decl) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitBlock(Block* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitEmptyStatement(EmptyStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitIfStatement(IfStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitContinueStatement(ContinueStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitBreakStatement(BreakStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitWithEnterStatement(WithEnterStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitWithExitStatement(WithExitStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitDoWhileStatement(DoWhileStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitWhileStatement(WhileStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitForStatement(ForStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitTryCatchStatement(TryCatchStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitTryFinallyStatement(TryFinallyStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitDebuggerStatement(DebuggerStatement* stmt) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitFunctionLiteral(FunctionLiteral* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitFunctionBoilerplateLiteral(
    FunctionBoilerplateLiteral* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitConditional(Conditional* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitSlot(Slot* expr) {
  // Slots do not appear directly in the AST.
  UNREACHABLE();
}


void FastCodeGenerator::VisitLiteral(Literal* expr) {
  // No code is emitted (here) for simple literals.
}


void FastCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitCatchExtensionObject(CatchExtensionObject* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitThrow(Throw* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitProperty(Property* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitCall(Call* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitCallNew(CallNew* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitCountOperation(CountOperation* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitBinaryOperation(BinaryOperation* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
  UNREACHABLE();
}


void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
  UNREACHABLE();
}


} }  // namespace v8::internal