Vyacheslav Egorov
beb7114861
This relands commit b0a71d364c
Cq-Include-Trybots: dart/try:vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-linux-release-simarm64-try,vm-kernel-linux-release-simarm-try,vm-kernel-precomp-linux-release-x64-try
Change-Id: I1d32e5d0d44f4e422d188643b548ed81859f7d74
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/143807
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/compiler/ffi/frame_rebase.h"
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namespace dart {
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namespace compiler {
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namespace ffi {
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const NativeLocation& FrameRebase::Rebase(const NativeLocation& loc) const {
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if (!loc.IsStack() || loc.AsStack().base_register() != old_base_) {
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return loc;
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}
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return *new (zone_) NativeStackLocation(
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loc.payload_type(), loc.container_type(), new_base_,
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loc.AsStack().offset_in_bytes() + stack_delta_in_bytes_);
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}
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Location FrameRebase::Rebase(const Location loc) const {
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if (loc.IsPairLocation()) {
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return Location::Pair(Rebase(loc.Component(0)), Rebase(loc.Component(1)));
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}
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if (!loc.HasStackIndex() || loc.base_reg() != old_base_) {
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return loc;
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}
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const intptr_t new_stack_index =
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loc.stack_index() + stack_delta_in_bytes_ / compiler::target::kWordSize;
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if (loc.IsStackSlot()) {
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return Location::StackSlot(new_stack_index, new_base_);
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}
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if (loc.IsDoubleStackSlot()) {
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return Location::DoubleStackSlot(new_stack_index, new_base_);
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}
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ASSERT(loc.IsQuadStackSlot());
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return Location::QuadStackSlot(new_stack_index, new_base_);
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}
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} // namespace ffi
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} // namespace compiler
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} // namespace dart
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