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1//=== SystemZMachineFunctionInfo.h - SystemZ machine function info -*- 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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H10#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H11 12#include "llvm/CodeGen/MachineFunction.h"13 14namespace llvm {15 16namespace SystemZ {17// A struct to hold the low and high GPR registers to be saved/restored as18// well as the offset into the register save area of the low register.19struct GPRRegs {20 unsigned LowGPR = 0;21 unsigned HighGPR = 0;22 unsigned GPROffset = 0;23 GPRRegs() = default;24 };25}26 27class SystemZMachineFunctionInfo : public MachineFunctionInfo {28 virtual void anchor();29 30 /// Size of expected parameter area for current function. (Fixed args only).31 unsigned SizeOfFnParams;32 33 SystemZ::GPRRegs SpillGPRRegs;34 SystemZ::GPRRegs RestoreGPRRegs;35 Register VarArgsFirstGPR;36 Register VarArgsFirstFPR;37 unsigned VarArgsFrameIndex;38 unsigned RegSaveFrameIndex;39 int FramePointerSaveIndex;40 unsigned NumLocalDynamics;41 /// z/OS XPLINK ABI: incoming ADA virtual register.42 Register VRegADA;43 44public:45 SystemZMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)46 : SizeOfFnParams(0), VarArgsFirstGPR(0), VarArgsFirstFPR(0),47 VarArgsFrameIndex(0), RegSaveFrameIndex(0), FramePointerSaveIndex(0),48 NumLocalDynamics(0) {}49 50 MachineFunctionInfo *51 clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,52 const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)53 const override;54 55 // z/OS: Get and set the size of the expected parameter area for the56 // current function. (ie. Size of param area in caller).57 unsigned getSizeOfFnParams() const { return SizeOfFnParams; }58 void setSizeOfFnParams(unsigned Size) { SizeOfFnParams = Size; }59 60 // Get and set the first and last call-saved GPR that should be saved by61 // this function and the SP offset for the STMG. These are 0 if no GPRs62 // need to be saved or restored.63 SystemZ::GPRRegs getSpillGPRRegs() const { return SpillGPRRegs; }64 void setSpillGPRRegs(Register Low, Register High, unsigned Offs) {65 SpillGPRRegs.LowGPR = Low;66 SpillGPRRegs.HighGPR = High;67 SpillGPRRegs.GPROffset = Offs;68 }69 70 // Get and set the first and last call-saved GPR that should be restored by71 // this function and the SP offset for the LMG. These are 0 if no GPRs72 // need to be saved or restored.73 SystemZ::GPRRegs getRestoreGPRRegs() const { return RestoreGPRRegs; }74 void setRestoreGPRRegs(Register Low, Register High, unsigned Offs) {75 RestoreGPRRegs.LowGPR = Low;76 RestoreGPRRegs.HighGPR = High;77 RestoreGPRRegs.GPROffset = Offs;78 }79 80 // Get and set the number of fixed (as opposed to variable) arguments81 // that are passed in GPRs to this function.82 Register getVarArgsFirstGPR() const { return VarArgsFirstGPR; }83 void setVarArgsFirstGPR(Register GPR) { VarArgsFirstGPR = GPR; }84 85 // Likewise FPRs.86 Register getVarArgsFirstFPR() const { return VarArgsFirstFPR; }87 void setVarArgsFirstFPR(Register FPR) { VarArgsFirstFPR = FPR; }88 89 // Get and set the frame index of the first stack vararg.90 unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }91 void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }92 93 // Get and set the frame index of the register save area94 // (i.e. the incoming stack pointer).95 unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }96 void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }97 98 // Get and set the frame index of where the old frame pointer is stored.99 int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }100 void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }101 102 // Count number of local-dynamic TLS symbols used.103 unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }104 void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }105 106 // Get and set the function's incoming special XPLINK ABI defined ADA107 // register.108 Register getADAVirtualRegister() const { return VRegADA; }109 void setADAVirtualRegister(Register Reg) { VRegADA = Reg; }110};111 112} // end namespace llvm113 114#endif115