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// 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
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