| // 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) |
| : fixed_slot_count_(fixed_frame_size_in_slots), |
| frame_slot_count_(fixed_frame_size_in_slots), |
| spill_slot_count_(0), |
| return_slot_count_(0), |
| allocated_registers_(nullptr), |
| allocated_double_registers_(nullptr) {} |
| |
| int Frame::AlignFrame(int alignment) { |
| int alignment_slots = alignment / kPointerSize; |
| // We have to align return slots separately, because they are claimed |
| // separately on the stack. |
| int return_delta = |
| alignment_slots - (return_slot_count_ & (alignment_slots - 1)); |
| if (return_delta != alignment_slots) { |
| frame_slot_count_ += return_delta; |
| } |
| int delta = alignment_slots - (frame_slot_count_ & (alignment_slots - 1)); |
| if (delta != alignment_slots) { |
| frame_slot_count_ += delta; |
| if (spill_slot_count_ != 0) { |
| spill_slot_count_ += delta; |
| } |
| } |
| return delta; |
| } |
| |
| void FrameAccessState::MarkHasFrame(bool state) { |
| has_frame_ = state; |
| SetFrameAccessToDefault(); |
| } |
| |
| void FrameAccessState::SetFrameAccessToDefault() { |
| if (has_frame() && !FLAG_turbo_sp_frame_access) { |
| SetFrameAccessToFP(); |
| } else { |
| SetFrameAccessToSP(); |
| } |
| } |
| |
| |
| FrameOffset FrameAccessState::GetFrameOffset(int spill_slot) const { |
| const int frame_offset = FrameSlotToFPOffset(spill_slot); |
| if (access_frame_with_fp()) { |
| return FrameOffset::FromFramePointer(frame_offset); |
| } else { |
| // No frame. Retrieve all parameters relative to stack pointer. |
| int sp_offset = frame_offset + GetSPToFPOffset(); |
| return FrameOffset::FromStackPointer(sp_offset); |
| } |
| } |
| |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |