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Issue 1460183002: [turbofan] Add general support for sp-based frame access (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Last comment addressed Created 5 years ago
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1 // Copyright 2015 the V8 project authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "src/compiler/frame.h" 5 #include "src/compiler/frame.h"
6 6
7 #include "src/compiler/linkage.h" 7 #include "src/compiler/linkage.h"
8 #include "src/compiler/register-allocator.h" 8 #include "src/compiler/register-allocator.h"
9 #include "src/macro-assembler.h" 9 #include "src/macro-assembler.h"
10 10
11 namespace v8 { 11 namespace v8 {
12 namespace internal { 12 namespace internal {
13 namespace compiler { 13 namespace compiler {
14 14
15 Frame::Frame(int fixed_frame_size_in_slots) 15 Frame::Frame(int fixed_frame_size_in_slots, const CallDescriptor* descriptor)
16 : frame_slot_count_(fixed_frame_size_in_slots), 16 : needs_frame_((descriptor != nullptr) &&
17 outgoing_parameter_slot_count_(0), 17 descriptor->RequiresFrameAsIncoming()),
18 frame_slot_count_(fixed_frame_size_in_slots),
18 callee_saved_slot_count_(0), 19 callee_saved_slot_count_(0),
19 spill_slot_count_(0), 20 spill_slot_count_(0),
20 allocated_registers_(NULL), 21 allocated_registers_(NULL),
21 allocated_double_registers_(NULL) {} 22 allocated_double_registers_(NULL) {}
22 23
24
25 void FrameAccessState::SetFrameAccessToDefault() {
26 if (frame()->needs_frame() && !FLAG_turbo_sp_frame_access) {
27 SetFrameAccessToFP();
28 } else {
29 SetFrameAccessToSP();
30 }
31 }
32
33
34 FrameOffset FrameAccessState::GetFrameOffset(int spill_slot) const {
35 const int offset =
36 (StandardFrameConstants::kFixedSlotCountAboveFp - spill_slot - 1) *
37 kPointerSize;
38 if (access_frame_with_fp()) {
39 DCHECK(frame()->needs_frame());
40 return FrameOffset::FromFramePointer(offset);
41 } else {
42 // No frame. Retrieve all parameters relative to stack pointer.
43 int sp_offset =
44 offset + ((frame()->GetSpToFpSlotCount() + sp_delta()) * kPointerSize);
45 return FrameOffset::FromStackPointer(sp_offset);
46 }
47 }
48
49
23 } // namespace compiler 50 } // namespace compiler
24 } // namespace internal 51 } // namespace internal
25 } // namespace v8 52 } // namespace v8
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