| // 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. |
| |
| #ifndef V8_VIRTUAL_FRAME_LIGHT_INL_H_ |
| #define V8_VIRTUAL_FRAME_LIGHT_INL_H_ |
| |
| #include "codegen.h" |
| #include "register-allocator.h" |
| #include "scopes.h" |
| #include "type-info.h" |
| |
| #include "codegen-inl.h" |
| #include "jump-target-light-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| VirtualFrame::VirtualFrame(InvalidVirtualFrameInitializer* dummy) |
| : element_count_(0), |
| top_of_stack_state_(NO_TOS_REGISTERS), |
| register_allocation_map_(0), |
| tos_known_smi_map_(0) { } |
| |
| |
| // On entry to a function, the virtual frame already contains the receiver, |
| // the parameters, and a return address. All frame elements are in memory. |
| VirtualFrame::VirtualFrame() |
| : element_count_(parameter_count() + 2), |
| top_of_stack_state_(NO_TOS_REGISTERS), |
| register_allocation_map_(0), |
| tos_known_smi_map_(0) { } |
| |
| |
| // When cloned, a frame is a deep copy of the original. |
| VirtualFrame::VirtualFrame(VirtualFrame* original) |
| : element_count_(original->element_count()), |
| top_of_stack_state_(original->top_of_stack_state_), |
| register_allocation_map_(original->register_allocation_map_), |
| tos_known_smi_map_(0) { } |
| |
| |
| bool VirtualFrame::Equals(const VirtualFrame* other) { |
| ASSERT(element_count() == other->element_count()); |
| if (top_of_stack_state_ != other->top_of_stack_state_) return false; |
| if (register_allocation_map_ != other->register_allocation_map_) return false; |
| if (tos_known_smi_map_ != other->tos_known_smi_map_) return false; |
| |
| return true; |
| } |
| |
| |
| void VirtualFrame::PrepareForReturn() { |
| SpillAll(); |
| } |
| |
| |
| VirtualFrame::RegisterAllocationScope::RegisterAllocationScope( |
| CodeGenerator* cgen) |
| : cgen_(cgen), |
| old_is_spilled_(SpilledScope::is_spilled_) { |
| SpilledScope::is_spilled_ = false; |
| if (old_is_spilled_) { |
| VirtualFrame* frame = cgen->frame(); |
| if (frame != NULL) { |
| frame->AssertIsSpilled(); |
| } |
| } |
| } |
| |
| |
| VirtualFrame::RegisterAllocationScope::~RegisterAllocationScope() { |
| SpilledScope::is_spilled_ = old_is_spilled_; |
| if (old_is_spilled_) { |
| VirtualFrame* frame = cgen_->frame(); |
| if (frame != NULL) { |
| frame->SpillAll(); |
| } |
| } |
| } |
| |
| |
| CodeGenerator* VirtualFrame::cgen() const { |
| return CodeGeneratorScope::Current(); |
| } |
| |
| |
| MacroAssembler* VirtualFrame::masm() { return cgen()->masm(); } |
| |
| |
| void VirtualFrame::CallStub(CodeStub* stub, int arg_count) { |
| if (arg_count != 0) Forget(arg_count); |
| ASSERT(cgen()->HasValidEntryRegisters()); |
| masm()->CallStub(stub); |
| } |
| |
| |
| int VirtualFrame::parameter_count() const { |
| return cgen()->scope()->num_parameters(); |
| } |
| |
| |
| int VirtualFrame::local_count() const { |
| return cgen()->scope()->num_stack_slots(); |
| } |
| |
| |
| int VirtualFrame::frame_pointer() const { return parameter_count() + 3; } |
| |
| |
| int VirtualFrame::context_index() { return frame_pointer() - 1; } |
| |
| |
| int VirtualFrame::function_index() { return frame_pointer() - 2; } |
| |
| |
| int VirtualFrame::local0_index() const { return frame_pointer() + 2; } |
| |
| |
| int VirtualFrame::fp_relative(int index) { |
| ASSERT(index < element_count()); |
| ASSERT(frame_pointer() < element_count()); // FP is on the frame. |
| return (frame_pointer() - index) * kPointerSize; |
| } |
| |
| |
| int VirtualFrame::expression_base_index() const { |
| return local0_index() + local_count(); |
| } |
| |
| |
| int VirtualFrame::height() const { |
| return element_count() - expression_base_index(); |
| } |
| |
| |
| MemOperand VirtualFrame::LocalAt(int index) { |
| ASSERT(0 <= index); |
| ASSERT(index < local_count()); |
| return MemOperand(fp, kLocal0Offset - index * kPointerSize); |
| } |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_VIRTUAL_FRAME_LIGHT_INL_H_ |