llvm/lib/Target/Mips/MipsFrameLowering.h

   1 //===-- MipsFrameLowering.h - Define frame lowering for Mips ----*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 //
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_MIPS_MIPSFRAMELOWERING_H
  14 #define LLVM_LIB_TARGET_MIPS_MIPSFRAMELOWERING_H
  15
  16 #include "Mips.h"
  17 #include "llvm/CodeGen/TargetFrameLowering.h"
  18
  19 namespace llvm {
  20   class MipsSubtarget;
  21
  22 class MipsFrameLowering : public TargetFrameLowering {
  23 protected:
  24   const MipsSubtarget &STI;
  25
  26 public:
  27   explicit MipsFrameLowering(const MipsSubtarget &sti, Align Alignment)
  28       : TargetFrameLowering(StackGrowsDown, Alignment, 0, Alignment), STI(sti) {
  29   }
  30
  31   static const MipsFrameLowering *create(const MipsSubtarget &ST);
  32
  33   bool hasFP(const MachineFunction &MF) const override;
  34
  35   bool hasBP(const MachineFunction &MF) const;
  36
  37   bool allocateScavengingFrameIndexesNearIncomingSP(
  38     const MachineFunction &MF) const override {
  39     return false;
  40   }
  41
  42   bool enableShrinkWrapping(const MachineFunction &MF) const override {
  43     return true;
  44   }
  45
  46   MachineBasicBlock::iterator
  47   eliminateCallFramePseudoInstr(MachineFunction &MF,
  48                                 MachineBasicBlock &MBB,
  49                                 MachineBasicBlock::iterator I) const override;
  50
  51 protected:
  52   uint64_t estimateStackSize(const MachineFunction &MF) const;
  53 };
  54
  55 /// Create MipsFrameLowering objects.
  56 const MipsFrameLowering *createMips16FrameLowering(const MipsSubtarget &ST);
  57 const MipsFrameLowering *createMipsSEFrameLowering(const MipsSubtarget &ST);
  58
  59 } // End llvm namespace
  60
  61 #endif