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

src/x64/fast-codegen-x64.cc

-// 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"
-
-#if defined(V8_TARGET_ARCH_X64)
-
-#include "codegen-inl.h"
-#include "fast-codegen.h"
-#include "scopes.h"
-
-namespace v8 {
-namespace internal {
-
-#define __ ACCESS_MASM(masm())
-
-Register FastCodeGenerator::accumulator0() { return rax; }
-Register FastCodeGenerator::accumulator1() { return rdx; }
-Register FastCodeGenerator::scratch0() { return rcx; }
-Register FastCodeGenerator::scratch1() { return rdi; }
-Register FastCodeGenerator::receiver_reg() { return rbx; }
-Register FastCodeGenerator::context_reg() { return rsi; }
-
-
-void FastCodeGenerator::EmitLoadReceiver() {
-  // Offset 2 is due to return address and saved frame pointer.
-  int index = 2 + scope()->num_parameters();
-  __ movq(receiver_reg(), Operand(rbp, index * kPointerSize));
-}
-
-
-void FastCodeGenerator::EmitGlobalVariableLoad(Handle<Object> cell) {
-  ASSERT(!destination().is(no_reg));
-  ASSERT(cell->IsJSGlobalPropertyCell());
-
-  __ Move(destination(), cell);
-  __ movq(destination(),
-          FieldOperand(destination(), JSGlobalPropertyCell::kValueOffset));
-  if (FLAG_debug_code) {
-    __ Cmp(destination(), Factory::the_hole_value());
-    __ Check(not_equal, "DontDelete cells can't contain the hole");
-  }
-
-  // The loaded value is not known to be a smi.
-  clear_as_smi(destination());
-}
-
-
-void FastCodeGenerator::EmitThisPropertyStore(Handle<String> name) {
-  LookupResult lookup;
-  info()->receiver()->Lookup(*name, &lookup);
-
-  ASSERT(lookup.holder() == *info()->receiver());
-  ASSERT(lookup.type() == FIELD);
-  Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
-  int index = lookup.GetFieldIndex() - map->inobject_properties();
-  int offset = index * kPointerSize;
-
-  // We will emit the write barrier unless the stored value is statically
-  // known to be a smi.
-  bool needs_write_barrier = !is_smi(accumulator0());
-
-  // Perform the store.  Negative offsets are inobject properties.
-  if (offset < 0) {
-    offset += map->instance_size();
-    __ movq(FieldOperand(receiver_reg(), offset), accumulator0());
-    if (needs_write_barrier) {
-      // Preserve receiver from write barrier.
-      __ movq(scratch0(), receiver_reg());
-    }
-  } else {
-    offset += FixedArray::kHeaderSize;
-    __ movq(scratch0(),
-            FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
-    __ movq(FieldOperand(scratch0(), offset), accumulator0());
-  }
-
-  if (needs_write_barrier) {
-    if (destination().is(no_reg)) {
-      // After RecordWrite accumulator0 is only accidently a smi, but it is
-      // already marked as not known to be one.
-      __ RecordWrite(scratch0(), offset, accumulator0(), scratch1());
-    } else {
-      // Copy the value to the other accumulator to preserve a copy from the
-      // write barrier. One of the accumulators is available as a scratch
-      // register.  Neither is a smi.
-      __ movq(accumulator1(), accumulator0());
-      clear_as_smi(accumulator1());
-      Register value_scratch = other_accumulator(destination());
-      __ RecordWrite(scratch0(), offset, value_scratch, scratch1());
-    }
-  } else if (destination().is(accumulator1())) {
-    __ movq(accumulator1(), accumulator0());
-    // Is a smi because we do not need the write barrier.
-    set_as_smi(accumulator1());
-  }
-}
-
-
-void FastCodeGenerator::EmitThisPropertyLoad(Handle<String> name) {
-  ASSERT(!destination().is(no_reg));
-  LookupResult lookup;
-  info()->receiver()->Lookup(*name, &lookup);
-
-  ASSERT(lookup.holder() == *info()->receiver());
-  ASSERT(lookup.type() == FIELD);
-  Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
-  int index = lookup.GetFieldIndex() - map->inobject_properties();
-  int offset = index * kPointerSize;
-
-  // Perform the load.  Negative offsets are inobject properties.
-  if (offset < 0) {
-    offset += map->instance_size();
-    __ movq(destination(), FieldOperand(receiver_reg(), offset));
-  } else {
-    offset += FixedArray::kHeaderSize;
-    __ movq(scratch0(),
-            FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
-    __ movq(destination(), FieldOperand(scratch0(), offset));
-  }
-
-  // The loaded value is not known to be a smi.
-  clear_as_smi(destination());
-}
-
-
-void FastCodeGenerator::EmitBitOr() {
-  if (is_smi(accumulator0()) && is_smi(accumulator1())) {
-    // If both operands are known to be a smi then there is no need to check
-    // the operands or result.
-    if (destination().is(no_reg)) {
-      __ or_(accumulator1(), accumulator0());
-    } else {
-      // Leave the result in the destination register.  Bitwise or is
-      // commutative.
-      __ or_(destination(), other_accumulator(destination()));
-    }
-  } else {
-    // Left is in accumulator1, right in accumulator0.
-    if (destination().is(accumulator0())) {
-      __ movq(scratch0(), accumulator0());
-      __ or_(destination(), accumulator1());  // Or is commutative.
-      Label* bailout =
-          info()->AddBailout(accumulator1(), scratch0());  // Left, right.
-      __ JumpIfNotSmi(destination(), bailout);
-    } else if (destination().is(accumulator1())) {
-      __ movq(scratch0(), accumulator1());
-      __ or_(destination(), accumulator0());
-      Label* bailout = info()->AddBailout(scratch0(), accumulator0());
-      __ JumpIfNotSmi(destination(), bailout);
-    } else {
-      ASSERT(destination().is(no_reg));
-      __ movq(scratch0(), accumulator1());
-      __ or_(scratch0(), accumulator0());
-      Label* bailout = info()->AddBailout(accumulator1(), accumulator0());
-      __ JumpIfNotSmi(scratch0(), bailout);
-    }
-  }
-
-  // If we didn't bailout, the result (in fact, both inputs too) is known to
-  // be a smi.
-  set_as_smi(accumulator0());
-  set_as_smi(accumulator1());
-}
-
-
-void FastCodeGenerator::Generate(CompilationInfo* compilation_info) {
-  ASSERT(info_ == NULL);
-  info_ = compilation_info;
-  Comment cmnt(masm_, "[ function compiled by fast code generator");
-
-  // Save the caller's frame pointer and set up our own.
-  Comment prologue_cmnt(masm(), ";; Prologue");
-  __ push(rbp);
-  __ movq(rbp, rsp);
-  __ push(rsi);  // Context.
-  __ push(rdi);  // Closure.
-  // Note that we keep a live register reference to esi (context) at this
-  // point.
-
-  Label* bailout_to_beginning = info()->AddBailout();
-  // Receiver (this) is allocated to a fixed register.
-  if (info()->has_this_properties()) {
-    Comment cmnt(masm(), ";; MapCheck(this)");
-    if (FLAG_print_ir) {
-      PrintF("MapCheck(this)\n");
-    }
-    ASSERT(info()->has_receiver() && info()->receiver()->IsHeapObject());
-    Handle<HeapObject> object = Handle<HeapObject>::cast(info()->receiver());
-    Handle<Map> map(object->map());
-    EmitLoadReceiver();
-    __ CheckMap(receiver_reg(), map, bailout_to_beginning, false);
-  }
-
-  // If there is a global variable access check if the global object is the
-  // same as at lazy-compilation time.
-  if (info()->has_globals()) {
-    Comment cmnt(masm(), ";; MapCheck(GLOBAL)");
-    if (FLAG_print_ir) {
-      PrintF("MapCheck(GLOBAL)\n");
-    }
-    ASSERT(info()->has_global_object());
-    Handle<Map> map(info()->global_object()->map());
-    __ movq(scratch0(), CodeGenerator::GlobalObject());
-    __ CheckMap(scratch0(), map, bailout_to_beginning, true);
-  }
-
-  VisitStatements(info()->function()->body());
-
-  Comment return_cmnt(masm(), ";; Return(<undefined>)");
-  if (FLAG_print_ir) {
-    PrintF("Return(<undefined>)\n");
-  }
-  __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-  __ movq(rsp, rbp);
-  __ pop(rbp);
-  __ ret((scope()->num_parameters() + 1) * kPointerSize);
-}
-
-
-#undef __
-
-
-} }  // namespace v8::internal
-
-#endif  // V8_TARGET_ARCH_X64