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 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 39 RegScavenger *RS = nullptr) const override; 40 41 StackOffset getFrameIndexReference(const MachineFunction &MF, int FI, 42 Register &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 protected: 50 bool hasFPImpl(const MachineFunction &MF) const override; 51 52 private: 53 // Remap input registers to output registers for leaf procedure. 54 void remapRegsForLeafProc(MachineFunction &MF) const; 55 56 // Returns true if MF is a leaf procedure. 57 bool isLeafProc(MachineFunction &MF) const; 58 59 60 // Emits code for adjusting SP in function prologue/epilogue. 61 void emitSPAdjustment(MachineFunction &MF, 62 MachineBasicBlock &MBB, 63 MachineBasicBlock::iterator MBBI, 64 int NumBytes, unsigned ADDrr, unsigned ADDri) const; 65 66 }; 67 68 } // End llvm namespace 69 70 #endif 71