Split the virtual frame into heavy and light versions....

src/jump-target-light.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"
+
+#include "codegen-inl.h"
+#include "jump-target-inl.h"
+
+namespace v8 {
+namespace internal {
+
+
+void JumpTarget::Jump(Result* arg) {
+  UNIMPLEMENTED();
+}
+
+
+void JumpTarget::Branch(Condition cc, Result* arg, Hint hint) {
+  UNIMPLEMENTED();
+}
+
+
+void BreakTarget::Branch(Condition cc, Result* arg, Hint hint) {
+  UNIMPLEMENTED();
+}
+
+
+void JumpTarget::Bind(Result* arg) {
+  UNIMPLEMENTED();
+}
+
+
+void JumpTarget::ComputeEntryFrame() {
+  UNIMPLEMENTED();
+}
+
+
+DeferredCode::DeferredCode()
+    : masm_(CodeGeneratorScope::Current()->masm()),
+      statement_position_(masm_->current_statement_position()),
+      position_(masm_->current_position()) {
+  ASSERT(statement_position_ != RelocInfo::kNoPosition);
+  ASSERT(position_ != RelocInfo::kNoPosition);
+
+  CodeGeneratorScope::Current()->AddDeferred(this);
+#ifdef DEBUG
+  comment_ = "";
+#endif
+
+  // Copy the register locations from the code generator's frame.
+  // These are the registers that will be spilled on entry to the
+  // deferred code and restored on exit.
+  VirtualFrame* frame = CodeGeneratorScope::Current()->frame();
+  for (int i = 0; i < RegisterAllocator::kNumRegisters; i++) {
+    int loc = frame->register_location(i);
+    if (loc == VirtualFrame::kIllegalIndex) {
+      registers_[i] = kIgnore;
+    } else {
+      // Needs to be restored on exit but not saved on entry.
+      registers_[i] = frame->fp_relative(loc) | kSyncedFlag;
+    }
+  }
+}
+
+} }  // namespace v8::internal