Remove experimental fast-codegen. We are no longer working on this

src/fast-codegen.cc

Index: src/fast-codegen.cc
===================================================================
--- src/fast-codegen.cc	(revision 5256)
+++ src/fast-codegen.cc	(working copy)
@@ -1,746 +0,0 @@
-// Copyright 2010 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 "data-flow.h"
-#include "fast-codegen.h"
-#include "scopes.h"
-
-namespace v8 {
-namespace internal {
-
-#define BAILOUT(reason)                         \
-  do {                                          \
-    if (FLAG_trace_bailout) {                   \
-      PrintF("%s\n", reason);                   \
-    }                                           \
-    has_supported_syntax_ = false;              \
-    return;                                     \
-  } while (false)
-
-
-#define CHECK_BAILOUT                           \
-  do {                                          \
-    if (!has_supported_syntax_) return;         \
-  } while (false)
-
-
-void FastCodeGenSyntaxChecker::Check(CompilationInfo* info) {
-  info_ = info;
-
-  // We do not specialize if we do not have a receiver or if it is not a
-  // JS object with fast mode properties.
-  if (!info->has_receiver()) BAILOUT("No receiver");
-  if (!info->receiver()->IsJSObject()) BAILOUT("Receiver is not an object");
-  Handle<JSObject> object = Handle<JSObject>::cast(info->receiver());
-  if (!object->HasFastProperties()) BAILOUT("Receiver is in dictionary mode");
-
-  // We do not support stack or heap slots (both of which require
-  // allocation).
-  Scope* scope = info->scope();
-  if (scope->num_stack_slots() > 0) {
-    BAILOUT("Function has stack-allocated locals");
-  }
-  if (scope->num_heap_slots() > 0) {
-    BAILOUT("Function has context-allocated locals");
-  }
-
-  VisitDeclarations(scope->declarations());
-  CHECK_BAILOUT;
-
-  // We do not support empty function bodies.
-  if (info->function()->body()->is_empty()) {
-    BAILOUT("Function has an empty body");
-  }
-  VisitStatements(info->function()->body());
-}
-
-
-void FastCodeGenSyntaxChecker::VisitDeclarations(
-    ZoneList<Declaration*>* decls) {
-  if (!decls->is_empty()) BAILOUT("Function has declarations");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitStatements(ZoneList<Statement*>* stmts) {
-  if (stmts->length() != 1) {
-    BAILOUT("Function body is not a singleton statement.");
-  }
-  Visit(stmts->at(0));
-}
-
-
-void FastCodeGenSyntaxChecker::VisitDeclaration(Declaration* decl) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenSyntaxChecker::VisitBlock(Block* stmt) {
-  VisitStatements(stmt->statements());
-}
-
-
-void FastCodeGenSyntaxChecker::VisitExpressionStatement(
-    ExpressionStatement* stmt) {
-  Visit(stmt->expression());
-}
-
-
-void FastCodeGenSyntaxChecker::VisitEmptyStatement(EmptyStatement* stmt) {
-  // Supported.
-}
-
-
-void FastCodeGenSyntaxChecker::VisitIfStatement(IfStatement* stmt) {
-  BAILOUT("IfStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitContinueStatement(ContinueStatement* stmt) {
-  BAILOUT("Continuestatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitBreakStatement(BreakStatement* stmt) {
-  BAILOUT("BreakStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitReturnStatement(ReturnStatement* stmt) {
-  BAILOUT("ReturnStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitWithEnterStatement(
-    WithEnterStatement* stmt) {
-  BAILOUT("WithEnterStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitWithExitStatement(WithExitStatement* stmt) {
-  BAILOUT("WithExitStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitSwitchStatement(SwitchStatement* stmt) {
-  BAILOUT("SwitchStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitDoWhileStatement(DoWhileStatement* stmt) {
-  BAILOUT("DoWhileStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitWhileStatement(WhileStatement* stmt) {
-  BAILOUT("WhileStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitForStatement(ForStatement* stmt) {
-  BAILOUT("ForStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitForInStatement(ForInStatement* stmt) {
-  BAILOUT("ForInStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitTryCatchStatement(TryCatchStatement* stmt) {
-  BAILOUT("TryCatchStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitTryFinallyStatement(
-    TryFinallyStatement* stmt) {
-  BAILOUT("TryFinallyStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitDebuggerStatement(
-    DebuggerStatement* stmt) {
-  BAILOUT("DebuggerStatement");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitFunctionLiteral(FunctionLiteral* expr) {
-  BAILOUT("FunctionLiteral");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitSharedFunctionInfoLiteral(
-    SharedFunctionInfoLiteral* expr) {
-  BAILOUT("SharedFunctionInfoLiteral");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitConditional(Conditional* expr) {
-  BAILOUT("Conditional");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitSlot(Slot* expr) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenSyntaxChecker::VisitVariableProxy(VariableProxy* expr) {
-  // Only global variable references are supported.
-  Variable* var = expr->var();
-  if (!var->is_global() || var->is_this()) BAILOUT("Non-global variable");
-
-  // Check if the global variable is existing and non-deletable.
-  if (info()->has_global_object()) {
-    LookupResult lookup;
-    info()->global_object()->Lookup(*expr->name(), &lookup);
-    if (!lookup.IsProperty()) {
-      BAILOUT("Non-existing global variable");
-    }
-    // We do not handle global variables with accessors or interceptors.
-    if (lookup.type() != NORMAL) {
-      BAILOUT("Global variable with accessors or interceptors.");
-    }
-    // We do not handle deletable global variables.
-    if (!lookup.IsDontDelete()) {
-      BAILOUT("Deletable global variable");
-    }
-  }
-}
-
-
-void FastCodeGenSyntaxChecker::VisitLiteral(Literal* expr) {
-  BAILOUT("Literal");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitRegExpLiteral(RegExpLiteral* expr) {
-  BAILOUT("RegExpLiteral");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitObjectLiteral(ObjectLiteral* expr) {
-  BAILOUT("ObjectLiteral");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitArrayLiteral(ArrayLiteral* expr) {
-  BAILOUT("ArrayLiteral");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitCatchExtensionObject(
-    CatchExtensionObject* expr) {
-  BAILOUT("CatchExtensionObject");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitAssignment(Assignment* expr) {
-  // Simple assignments to (named) this properties are supported.
-  if (expr->op() != Token::ASSIGN) BAILOUT("Non-simple assignment");
-
-  Property* prop = expr->target()->AsProperty();
-  if (prop == NULL) BAILOUT("Non-property assignment");
-  VariableProxy* proxy = prop->obj()->AsVariableProxy();
-  if (proxy == NULL || !proxy->var()->is_this()) {
-    BAILOUT("Non-this-property assignment");
-  }
-  if (!prop->key()->IsPropertyName()) {
-    BAILOUT("Non-named-property assignment");
-  }
-
-  // We will only specialize for fields on the object itself.
-  // Expression::IsPropertyName implies that the name is a literal
-  // symbol but we do not assume that.
-  Literal* key = prop->key()->AsLiteral();
-  if (key != NULL && key->handle()->IsString()) {
-    Handle<Object> receiver = info()->receiver();
-    Handle<String> name = Handle<String>::cast(key->handle());
-    LookupResult lookup;
-    receiver->Lookup(*name, &lookup);
-    if (!lookup.IsProperty()) {
-      BAILOUT("Assigned property not found at compile time");
-    }
-    if (lookup.holder() != *receiver) BAILOUT("Non-own property assignment");
-    if (!lookup.type() == FIELD) BAILOUT("Non-field property assignment");
-  } else {
-    UNREACHABLE();
-    BAILOUT("Unexpected non-string-literal property key");
-  }
-
-  Visit(expr->value());
-}
-
-
-void FastCodeGenSyntaxChecker::VisitThrow(Throw* expr) {
-  BAILOUT("Throw");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitProperty(Property* expr) {
-  // We support named this property references.
-  VariableProxy* proxy = expr->obj()->AsVariableProxy();
-  if (proxy == NULL || !proxy->var()->is_this()) {
-    BAILOUT("Non-this-property reference");
-  }
-  if (!expr->key()->IsPropertyName()) {
-    BAILOUT("Non-named-property reference");
-  }
-
-  // We will only specialize for fields on the object itself.
-  // Expression::IsPropertyName implies that the name is a literal
-  // symbol but we do not assume that.
-  Literal* key = expr->key()->AsLiteral();
-  if (key != NULL && key->handle()->IsString()) {
-    Handle<Object> receiver = info()->receiver();
-    Handle<String> name = Handle<String>::cast(key->handle());
-    LookupResult lookup;
-    receiver->Lookup(*name, &lookup);
-    if (!lookup.IsProperty()) {
-      BAILOUT("Referenced property not found at compile time");
-    }
-    if (lookup.holder() != *receiver) BAILOUT("Non-own property reference");
-    if (!lookup.type() == FIELD) BAILOUT("Non-field property reference");
-  } else {
-    UNREACHABLE();
-    BAILOUT("Unexpected non-string-literal property key");
-  }
-}
-
-
-void FastCodeGenSyntaxChecker::VisitCall(Call* expr) {
-  BAILOUT("Call");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitCallNew(CallNew* expr) {
-  BAILOUT("CallNew");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitCallRuntime(CallRuntime* expr) {
-  BAILOUT("CallRuntime");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitUnaryOperation(UnaryOperation* expr) {
-  BAILOUT("UnaryOperation");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitCountOperation(CountOperation* expr) {
-  BAILOUT("CountOperation");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitBinaryOperation(BinaryOperation* expr) {
-  // We support bitwise OR.
-  switch (expr->op()) {
-    case Token::COMMA:
-      BAILOUT("BinaryOperation COMMA");
-    case Token::OR:
-      BAILOUT("BinaryOperation OR");
-    case Token::AND:
-      BAILOUT("BinaryOperation AND");
-
-    case Token::BIT_OR:
-      // We support expressions nested on the left because they only require
-      // a pair of registers to keep all intermediate values in registers
-      // (i.e., the expression stack has height no more than two).
-      if (!expr->right()->IsLeaf()) BAILOUT("expression nested on right");
-
-      // We do not allow subexpressions with side effects because we
-      // (currently) bail out to the beginning of the full function.  The
-      // only expressions with side effects that we would otherwise handle
-      // are assignments.
-      if (expr->left()->AsAssignment() != NULL ||
-          expr->right()->AsAssignment() != NULL) {
-        BAILOUT("subexpression of binary operation has side effects");
-      }
-
-      Visit(expr->left());
-      CHECK_BAILOUT;
-      Visit(expr->right());
-      break;
-
-    case Token::BIT_XOR:
-      BAILOUT("BinaryOperation BIT_XOR");
-    case Token::BIT_AND:
-      BAILOUT("BinaryOperation BIT_AND");
-    case Token::SHL:
-      BAILOUT("BinaryOperation SHL");
-    case Token::SAR:
-      BAILOUT("BinaryOperation SAR");
-    case Token::SHR:
-      BAILOUT("BinaryOperation SHR");
-    case Token::ADD:
-      BAILOUT("BinaryOperation ADD");
-    case Token::SUB:
-      BAILOUT("BinaryOperation SUB");
-    case Token::MUL:
-      BAILOUT("BinaryOperation MUL");
-    case Token::DIV:
-      BAILOUT("BinaryOperation DIV");
-    case Token::MOD:
-      BAILOUT("BinaryOperation MOD");
-    default:
-      UNREACHABLE();
-  }
-}
-
-
-void FastCodeGenSyntaxChecker::VisitCompareOperation(CompareOperation* expr) {
-  BAILOUT("CompareOperation");
-}
-
-
-void FastCodeGenSyntaxChecker::VisitThisFunction(ThisFunction* expr) {
-  BAILOUT("ThisFunction");
-}
-
-#undef BAILOUT
-#undef CHECK_BAILOUT
-
-
-#define __ ACCESS_MASM(masm())
-
-Handle<Code> FastCodeGenerator::MakeCode(CompilationInfo* info) {
-  // Label the AST before calling MakeCodePrologue, so AST node numbers are
-  // printed with the AST.
-  AstLabeler labeler;
-  labeler.Label(info);
-
-  CodeGenerator::MakeCodePrologue(info);
-
-  const int kInitialBufferSize = 4 * KB;
-  MacroAssembler masm(NULL, kInitialBufferSize);
-
-  // Generate the fast-path code.
-  FastCodeGenerator fast_cgen(&masm);
-  fast_cgen.Generate(info);
-  if (fast_cgen.HasStackOverflow()) {
-    ASSERT(!Top::has_pending_exception());
-    return Handle<Code>::null();
-  }
-
-  // Generate the full code for the function in bailout mode, using the same
-  // macro assembler.
-  CodeGenerator cgen(&masm);
-  CodeGeneratorScope scope(&cgen);
-  info->set_mode(CompilationInfo::SECONDARY);
-  cgen.Generate(info);
-  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(&masm, flags, info);
-}
-
-
-void FastCodeGenerator::VisitDeclaration(Declaration* decl) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitBlock(Block* stmt) {
-  VisitStatements(stmt->statements());
-}
-
-
-void FastCodeGenerator::VisitExpressionStatement(ExpressionStatement* stmt) {
-  Visit(stmt->expression());
-}
-
-
-void FastCodeGenerator::VisitEmptyStatement(EmptyStatement* stmt) {
-  // Nothing to do.
-}
-
-
-void FastCodeGenerator::VisitIfStatement(IfStatement* stmt) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitContinueStatement(ContinueStatement* stmt) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitBreakStatement(BreakStatement* stmt) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitReturnStatement(ReturnStatement* 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::VisitSharedFunctionInfoLiteral(
-    SharedFunctionInfoLiteral* expr) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitConditional(Conditional* expr) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitSlot(Slot* expr) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
-  ASSERT(expr->var()->is_global() && !expr->var()->is_this());
-  // Check if we can compile a global variable load directly from the cell.
-  ASSERT(info()->has_global_object());
-  LookupResult lookup;
-  info()->global_object()->Lookup(*expr->name(), &lookup);
-  // We only support normal (non-accessor/interceptor) DontDelete properties
-  // for now.
-  ASSERT(lookup.IsProperty());
-  ASSERT_EQ(NORMAL, lookup.type());
-  ASSERT(lookup.IsDontDelete());
-  Handle<Object> cell(info()->global_object()->GetPropertyCell(&lookup));
-
-  // Global variable lookups do not have side effects, so we do not need to
-  // emit code if we are in an effect context.
-  if (!destination().is(no_reg)) {
-    Comment cmnt(masm(), ";; Global");
-    if (FLAG_print_ir) {
-      SmartPointer<char> name = expr->name()->ToCString();
-      PrintF("%d: t%d = Global(%s)\n", expr->num(),
-             expr->num(), *name);
-    }
-    EmitGlobalVariableLoad(cell);
-  }
-}
-
-
-void FastCodeGenerator::VisitLiteral(Literal* expr) {
-  UNREACHABLE();
-}
-
-
-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::VisitAssignment(Assignment* expr) {
-  // Known to be a simple this property assignment.  Effectively a unary
-  // operation.
-  { Register my_destination = destination();
-    set_destination(accumulator0());
-    Visit(expr->value());
-    set_destination(my_destination);
-  }
-
-  Property* prop = expr->target()->AsProperty();
-  ASSERT_NOT_NULL(prop);
-  ASSERT_NOT_NULL(prop->obj()->AsVariableProxy());
-  ASSERT(prop->obj()->AsVariableProxy()->var()->is_this());
-  ASSERT(prop->key()->IsPropertyName());
-  Handle<String> name =
-      Handle<String>::cast(prop->key()->AsLiteral()->handle());
-
-  Comment cmnt(masm(), ";; Store to this");
-  if (FLAG_print_ir) {
-    SmartPointer<char> name_string = name->ToCString();
-    PrintF("%d: ", expr->num());
-    if (!destination().is(no_reg)) PrintF("t%d = ", expr->num());
-    PrintF("Store(this, \"%s\", t%d)\n", *name_string,
-           expr->value()->num());
-  }
-
-  EmitThisPropertyStore(name);
-}
-
-
-void FastCodeGenerator::VisitThrow(Throw* expr) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitProperty(Property* expr) {
-  ASSERT_NOT_NULL(expr->obj()->AsVariableProxy());
-  ASSERT(expr->obj()->AsVariableProxy()->var()->is_this());
-  ASSERT(expr->key()->IsPropertyName());
-  if (!destination().is(no_reg)) {
-    Handle<String> name =
-        Handle<String>::cast(expr->key()->AsLiteral()->handle());
-
-    Comment cmnt(masm(), ";; Load from this");
-    if (FLAG_print_ir) {
-      SmartPointer<char> name_string = name->ToCString();
-      PrintF("%d: t%d = Load(this, \"%s\")\n",
-             expr->num(), expr->num(), *name_string);
-    }
-    EmitThisPropertyLoad(name);
-  }
-}
-
-
-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) {
-  // We support limited binary operations: bitwise OR only allowed to be
-  // nested on the left.
-  ASSERT(expr->op() == Token::BIT_OR);
-  ASSERT(expr->right()->IsLeaf());
-
-  { Register my_destination = destination();
-    set_destination(accumulator1());
-    Visit(expr->left());
-    set_destination(accumulator0());
-    Visit(expr->right());
-    set_destination(my_destination);
-  }
-
-  Comment cmnt(masm(), ";; BIT_OR");
-  if (FLAG_print_ir) {
-    PrintF("%d: ", expr->num());
-    if (!destination().is(no_reg)) PrintF("t%d = ", expr->num());
-    PrintF("BIT_OR(t%d, t%d)\n", expr->left()->num(), expr->right()->num());
-  }
-  EmitBitOr();
-}
-
-
-void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
-  UNREACHABLE();
-}
-
-
-void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
-  UNREACHABLE();
-}
-
-#undef __
-
-
-} }  // namespace v8::internal