1 files changed, 0 insertions, 151 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsFrameLowering.cpp b/contrib/llvm/lib/Target/Mips/MipsFrameLowering.cpp
deleted file mode 100644
index 8d5eabf59b71..000000000000
--- a/contrib/llvm/lib/Target/Mips/MipsFrameLowering.cpp
+++ /dev/null
@@ -1,151 +0,0 @@
-//===-- MipsFrameLowering.cpp - Mips Frame Information --------------------===//
-//
-// 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 Mips implementation of TargetFrameLowering class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MipsFrameLowering.h"
-#include "MCTargetDesc/MipsBaseInfo.h"
-#include "MipsInstrInfo.h"
-#include "MipsMachineFunction.h"
-#include "MipsTargetMachine.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/Function.h"
-#include "llvm/Target/TargetOptions.h"
-
-using namespace llvm;
-
-
-//===----------------------------------------------------------------------===//
-//
-// Stack Frame Processing methods
-// +----------------------------+
-//
-// The stack is allocated decrementing the stack pointer on
-// the first instruction of a function prologue. Once decremented,
-// all stack references are done thought a positive offset
-// from the stack/frame pointer, so the stack is considering
-// to grow up! Otherwise terrible hacks would have to be made
-// to get this stack ABI compliant :)
-//
-//  The stack frame required by the ABI (after call):
-//  Offset
-//
-//  0                 ----------
-//  4                 Args to pass
-//  .                 saved $GP  (used in PIC)
-//  .                 Alloca allocations
-//  .                 Local Area
-//  .                 CPU "Callee Saved" Registers
-//  .                 saved FP
-//  .                 saved RA
-//  .                 FPU "Callee Saved" Registers
-//  StackSize         -----------
-//
-// Offset - offset from sp after stack allocation on function prologue
-//
-// The sp is the stack pointer subtracted/added from the stack size
-// at the Prologue/Epilogue
-//
-// References to the previous stack (to obtain arguments) are done
-// with offsets that exceeds the stack size: (stacksize+(4*(num_arg-1))
-//
-// Examples:
-// - reference to the actual stack frame
-//   for any local area var there is smt like : FI >= 0, StackOffset: 4
-//     sw REGX, 4(SP)
-//
-// - reference to previous stack frame
-//   suppose there's a load to the 5th arguments : FI < 0, StackOffset: 16.
-//   The emitted instruction will be something like:
-//     lw REGX, 16+StackSize(SP)
-//
-// Since the total stack size is unknown on LowerFormalArguments, all
-// stack references (ObjectOffset) created to reference the function
-// arguments, are negative numbers. This way, on eliminateFrameIndex it's
-// possible to detect those references and the offsets are adjusted to
-// their real location.
-//
-//===----------------------------------------------------------------------===//
-
-const MipsFrameLowering *MipsFrameLowering::create(const MipsSubtarget &ST) {
-  if (ST.inMips16Mode())
-    return llvm::createMips16FrameLowering(ST);
-
-  return llvm::createMipsSEFrameLowering(ST);
-}
-
-// hasFP - Return true if the specified function should have a dedicated frame
-// pointer register.  This is true if the function has variable sized allocas,
-// if it needs dynamic stack realignment, if frame pointer elimination is
-// disabled, or if the frame address is taken.
-bool MipsFrameLowering::hasFP(const MachineFunction &MF) const {
-  const MachineFrameInfo &MFI = MF.getFrameInfo();
-  const TargetRegisterInfo *TRI = STI.getRegisterInfo();
-
-  return MF.getTarget().Options.DisableFramePointerElim(MF) ||
-      MFI.hasVarSizedObjects() || MFI.isFrameAddressTaken() ||
-      TRI->needsStackRealignment(MF);
-}
-
-bool MipsFrameLowering::hasBP(const MachineFunction &MF) const {
-  const MachineFrameInfo &MFI = MF.getFrameInfo();
-  const TargetRegisterInfo *TRI = STI.getRegisterInfo();
-
-  return MFI.hasVarSizedObjects() && TRI->needsStackRealignment(MF);
-}
-
-// Estimate the size of the stack, including the incoming arguments. We need to
-// account for register spills, local objects, reserved call frame and incoming
-// arguments. This is required to determine the largest possible positive offset
-// from $sp so that it can be determined if an emergency spill slot for stack
-// addresses is required.
-uint64_t MipsFrameLowering::estimateStackSize(const MachineFunction &MF) const {
-  const MachineFrameInfo &MFI = MF.getFrameInfo();
-  const TargetRegisterInfo &TRI = *STI.getRegisterInfo();
-
-  int64_t Size = 0;
-
-  // Iterate over fixed sized objects which are incoming arguments.
-  for (int I = MFI.getObjectIndexBegin(); I != 0; ++I)
-    if (MFI.getObjectOffset(I) > 0)
-      Size += MFI.getObjectSize(I);
-
-  // Conservatively assume all callee-saved registers will be saved.
-  for (const MCPhysReg *R = TRI.getCalleeSavedRegs(&MF); *R; ++R) {
-    unsigned RegSize = TRI.getSpillSize(*TRI.getMinimalPhysRegClass(*R));
-    Size = alignTo(Size + RegSize, RegSize);
-  }
-
-  // Get the size of the rest of the frame objects and any possible reserved
-  // call frame, accounting for alignment.
-  return Size + MFI.estimateStackSize(MF);
-}
-
-// Eliminate ADJCALLSTACKDOWN, ADJCALLSTACKUP pseudo instructions
-MachineBasicBlock::iterator MipsFrameLowering::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
-                              MachineBasicBlock::iterator I) const {
-  unsigned SP = STI.getABI().IsN64() ? Mips::SP_64 : Mips::SP;
-
-  if (!hasReservedCallFrame(MF)) {
-    int64_t Amount = I->getOperand(0).getImm();
-    if (I->getOpcode() == Mips::ADJCALLSTACKDOWN)
-      Amount = -Amount;
-
-    STI.getInstrInfo()->adjustStackPtr(SP, Amount, MBB, I);
-  }
-
-  return MBB.erase(I);
-}