1 //===-- SparcFrameLowering.h - Define frame lowering for Sparc --*- 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_SPARC_SPARCFRAMELOWERING_H 14 #define LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_H 15 16 #include "Sparc.h" 17 #include "llvm/CodeGen/TargetFrameLowering.h" 18 19 namespace llvm { 20 21 class SparcSubtarget; 22 class SparcFrameLowering : public TargetFrameLowering { 23 public: 24 explicit SparcFrameLowering(const SparcSubtarget &ST); 25 26 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into 27 /// the function. 28 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 29 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 30 31 MachineBasicBlock::iterator 32 eliminateCallFramePseudoInstr(MachineFunction &MF, 33 MachineBasicBlock &MBB, 34 MachineBasicBlock::iterator I) const override; 35 36 bool hasReservedCallFrame(const MachineFunction &MF) const override; 37 bool hasFP(const MachineFunction &MF) const override; 38 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 39 RegScavenger *RS = nullptr) const override; 40 41 int getFrameIndexReference(const MachineFunction &MF, int FI, 42 unsigned &FrameReg) const override; 43 44 /// targetHandlesStackFrameRounding - Returns true if the target is 45 /// responsible for rounding up the stack frame (probably at emitPrologue 46 /// time). 47 bool targetHandlesStackFrameRounding() const override { return true; } 48 49 private: 50 // Remap input registers to output registers for leaf procedure. 51 void remapRegsForLeafProc(MachineFunction &MF) const; 52 53 // Returns true if MF is a leaf procedure. 54 bool isLeafProc(MachineFunction &MF) const; 55 56 57 // Emits code for adjusting SP in function prologue/epilogue. 58 void emitSPAdjustment(MachineFunction &MF, 59 MachineBasicBlock &MBB, 60 MachineBasicBlock::iterator MBBI, 61 int NumBytes, unsigned ADDrr, unsigned ADDri) const; 62 63 }; 64 65 } // End llvm namespace 66 67 #endif 68