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 #include "llvm/Support/TypeSize.h" 19 20 namespace llvm { 21 22 class SparcSubtarget; 23 class SparcFrameLowering : public TargetFrameLowering { 24 public: 25 explicit SparcFrameLowering(const SparcSubtarget &ST); 26 27 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into 28 /// the function. 29 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 30 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 31 32 MachineBasicBlock::iterator 33 eliminateCallFramePseudoInstr(MachineFunction &MF, 34 MachineBasicBlock &MBB, 35 MachineBasicBlock::iterator I) const override; 36 37 bool hasReservedCallFrame(const MachineFunction &MF) const override; 38 bool hasFP(const MachineFunction &MF) const override; 39 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 40 RegScavenger *RS = nullptr) const override; 41 42 StackOffset getFrameIndexReference(const MachineFunction &MF, int FI, 43 Register &FrameReg) const override; 44 45 /// targetHandlesStackFrameRounding - Returns true if the target is 46 /// responsible for rounding up the stack frame (probably at emitPrologue 47 /// time). 48 bool targetHandlesStackFrameRounding() const override { return true; } 49 50 private: 51 // Remap input registers to output registers for leaf procedure. 52 void remapRegsForLeafProc(MachineFunction &MF) const; 53 54 // Returns true if MF is a leaf procedure. 55 bool isLeafProc(MachineFunction &MF) const; 56 57 58 // Emits code for adjusting SP in function prologue/epilogue. 59 void emitSPAdjustment(MachineFunction &MF, 60 MachineBasicBlock &MBB, 61 MachineBasicBlock::iterator MBBI, 62 int NumBytes, unsigned ADDrr, unsigned ADDri) const; 63 64 }; 65 66 } // End llvm namespace 67 68 #endif 69