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 15 Frame::Frame(int fixed_frame_size_in_slots) 16 : frame_slot_count_(fixed_frame_size_in_slots), 17 spill_slot_count_(0), 18 allocated_registers_(nullptr), 19 allocated_double_registers_(nullptr) {} 20 21 int Frame::AlignFrame(int alignment) { 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 } 37 38 void FrameAccessState::SetFrameAccessToDefault() { 39 if (has_frame() && !FLAG_turbo_sp_frame_access) { 40 SetFrameAccessToFP(); 41 } else { 42 SetFrameAccessToSP(); 43 } 44 } 45 46 47 FrameOffset FrameAccessState::GetFrameOffset(int spill_slot) const { 48 const int frame_offset = FrameSlotToFPOffset(spill_slot); 49 if (access_frame_with_fp()) { 50 return FrameOffset::FromFramePointer(frame_offset); 51 } else { 52 // No frame. Retrieve all parameters relative to stack pointer. 53 int sp_offset = frame_offset + GetSPToFPOffset(); 54 return FrameOffset::FromStackPointer(sp_offset); 55 } 56 } 57 58 59 } // namespace compiler 60 } // namespace internal 61 } // namespace v8 62
