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 62