1 files changed, 55 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp b/contrib/llvm-project/llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp
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index 000000000000..7182d55ca3cf
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+++ b/contrib/llvm-project/llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp
@@ -0,0 +1,55 @@
+//===-- LoongArchFrameLowering.cpp - LoongArch Frame Information -*- C++ -*-==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the LoongArch implementation of TargetFrameLowering class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LoongArchFrameLowering.h"
+#include "LoongArchSubtarget.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/RegisterScavenging.h"
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/MC/MCDwarf.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "loongarch-frame-lowering"
+
+// Return true if the specified function should have a dedicated frame
+// pointer register.  This is true if frame pointer elimination is
+// disabled, if it needs dynamic stack realignment, if the function has
+// variable sized allocas, or if the frame address is taken.
+bool LoongArchFrameLowering::hasFP(const MachineFunction &MF) const {
+  const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo();
+
+  const MachineFrameInfo &MFI = MF.getFrameInfo();
+  return MF.getTarget().Options.DisableFramePointerElim(MF) ||
+         RegInfo->hasStackRealignment(MF) || MFI.hasVarSizedObjects() ||
+         MFI.isFrameAddressTaken();
+}
+
+bool LoongArchFrameLowering::hasBP(const MachineFunction &MF) const {
+  const MachineFrameInfo &MFI = MF.getFrameInfo();
+  const TargetRegisterInfo *TRI = STI.getRegisterInfo();
+
+  return MFI.hasVarSizedObjects() && TRI->hasStackRealignment(MF);
+}
+
+void LoongArchFrameLowering::emitPrologue(MachineFunction &MF,
+                                          MachineBasicBlock &MBB) const {
+  // TODO: Implement this when we have function calls
+}
+
+void LoongArchFrameLowering::emitEpilogue(MachineFunction &MF,
+                                          MachineBasicBlock &MBB) const {
+  // TODO: Implement this when we have function calls
+}