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: MipsFrameLowering(const MipsSubtarget & sti,Align Alignment)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 isFPCloseToIncomingSP()37 bool isFPCloseToIncomingSP() const override { return false; } 38 enableShrinkWrapping(const MachineFunction & MF)39 bool enableShrinkWrapping(const MachineFunction &MF) const override { 40 return true; 41 } 42 43 MachineBasicBlock::iterator 44 eliminateCallFramePseudoInstr(MachineFunction &MF, 45 MachineBasicBlock &MBB, 46 MachineBasicBlock::iterator I) const override; 47 48 protected: 49 uint64_t estimateStackSize(const MachineFunction &MF) const; 50 }; 51 52 /// Create MipsFrameLowering objects. 53 const MipsFrameLowering *createMips16FrameLowering(const MipsSubtarget &ST); 54 const MipsFrameLowering *createMipsSEFrameLowering(const MipsSubtarget &ST); 55 56 } // End llvm namespace 57 58 #endif 59