Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/compiler/frame.h" |
| 6 | |
| 7 | #include "src/compiler/linkage.h" |
| 8 | #include "src/compiler/register-allocator.h" |
| 9 | #include "src/macro-assembler.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | namespace compiler { |
| 14 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 15 | Frame::Frame(int fixed_frame_size_in_slots) |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 16 | : frame_slot_count_(fixed_frame_size_in_slots), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 17 | spill_slot_count_(0), |
| 18 | allocated_registers_(nullptr), |
| 19 | allocated_double_registers_(nullptr) {} |
| 20 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 21 | int Frame::AlignFrame(int alignment) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 22 | int alignment_slots = alignment / kPointerSize; |
| 23 | int delta = alignment_slots - (frame_slot_count_ & (alignment_slots - 1)); |
| 24 | if (delta != alignment_slots) { |
| 25 | frame_slot_count_ += delta; |
| 26 | if (spill_slot_count_ != 0) { |
| 27 | spill_slot_count_ += delta; |
| 28 | } |
| 29 | } |
| 30 | return delta; |
| 31 | } |
| 32 | |
| 33 | void FrameAccessState::MarkHasFrame(bool state) { |
| 34 | has_frame_ = state; |
| 35 | SetFrameAccessToDefault(); |
| 36 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 37 | |
| 38 | void FrameAccessState::SetFrameAccessToDefault() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 39 | if (has_frame() && !FLAG_turbo_sp_frame_access) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 40 | SetFrameAccessToFP(); |
| 41 | } else { |
| 42 | SetFrameAccessToSP(); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | |
| 47 | FrameOffset FrameAccessState::GetFrameOffset(int spill_slot) const { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 48 | const int frame_offset = FrameSlotToFPOffset(spill_slot); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 49 | if (access_frame_with_fp()) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 50 | return FrameOffset::FromFramePointer(frame_offset); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 51 | } else { |
| 52 | // No frame. Retrieve all parameters relative to stack pointer. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 53 | int sp_offset = frame_offset + GetSPToFPOffset(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 54 | return FrameOffset::FromStackPointer(sp_offset); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | |
| 59 | } // namespace compiler |
| 60 | } // namespace internal |
| 61 | } // namespace v8 |