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, unsigned Alignment)
  28     : TargetFrameLowering(StackGrowsDown, Alignment, 0, Alignment), STI(sti) {}
  29
  30   static const MipsFrameLowering *create(const MipsSubtarget &ST);
  31
  32   bool hasFP(const MachineFunction &MF) const override;
  33
  34   bool hasBP(const MachineFunction &MF) const;
  35
  36   bool isFPCloseToIncomingSP() const override { return false; }
  37
  38   bool enableShrinkWrapping(const MachineFunction &MF) const override {
  39     return true;
  40   }
  41
  42   MachineBasicBlock::iterator
  43   eliminateCallFramePseudoInstr(MachineFunction &MF,
  44                                 MachineBasicBlock &MBB,
  45                                 MachineBasicBlock::iterator I) const override;
  46
  47 protected:
  48   uint64_t estimateStackSize(const MachineFunction &MF) const;
  49 };
  50
  51 /// Create MipsFrameLowering objects.
  52 const MipsFrameLowering *createMips16FrameLowering(const MipsSubtarget &ST);
  53 const MipsFrameLowering *createMipsSEFrameLowering(const MipsSubtarget &ST);
  54
  55 } // End llvm namespace
  56
  57 #endif