| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/compiler/frame.h" |
| |
| #include "src/compiler/linkage.h" |
| #include "src/compiler/register-allocator.h" |
| #include "src/macro-assembler.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace compiler { |
| |
| Frame::Frame(int fixed_frame_size_in_slots, const CallDescriptor* descriptor) |
| : needs_frame_((descriptor != nullptr) && |
| descriptor->RequiresFrameAsIncoming()), |
| frame_slot_count_(fixed_frame_size_in_slots), |
| callee_saved_slot_count_(0), |
| spill_slot_count_(0), |
| allocated_registers_(nullptr), |
| allocated_double_registers_(nullptr) {} |
| |
| |
| void FrameAccessState::SetFrameAccessToDefault() { |
| if (frame()->needs_frame() && !FLAG_turbo_sp_frame_access) { |
| SetFrameAccessToFP(); |
| } else { |
| SetFrameAccessToSP(); |
| } |
| } |
| |
| |
| FrameOffset FrameAccessState::GetFrameOffset(int spill_slot) const { |
| const int offset = |
| (StandardFrameConstants::kFixedSlotCountAboveFp - spill_slot - 1) * |
| kPointerSize; |
| if (access_frame_with_fp()) { |
| DCHECK(frame()->needs_frame()); |
| return FrameOffset::FromFramePointer(offset); |
| } else { |
| // No frame. Retrieve all parameters relative to stack pointer. |
| int sp_offset = |
| offset + ((frame()->GetSpToFpSlotCount() + sp_delta()) * kPointerSize); |
| return FrameOffset::FromStackPointer(sp_offset); |
| } |
| } |
| |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |