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//=== SystemZMachineFunctionInfo.h - SystemZ machine function info -*- C++ -*-//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
#include "llvm/CodeGen/MachineFunction.h"
namespace llvm {
namespace SystemZ {
// A struct to hold the low and high GPR registers to be saved/restored as
// well as the offset into the register save area of the low register.
struct GPRRegs {
unsigned LowGPR = 0;
unsigned HighGPR = 0;
unsigned GPROffset = 0;
GPRRegs() = default;
};
}
class SystemZMachineFunctionInfo : public MachineFunctionInfo {
virtual void anchor();
/// Size of expected parameter area for current function. (Fixed args only).
unsigned SizeOfFnParams;
SystemZ::GPRRegs SpillGPRRegs;
SystemZ::GPRRegs RestoreGPRRegs;
Register VarArgsFirstGPR;
Register VarArgsFirstFPR;
unsigned VarArgsFrameIndex;
unsigned RegSaveFrameIndex;
int FramePointerSaveIndex;
unsigned NumLocalDynamics;
/// z/OS XPLINK ABI: incoming ADA virtual register.
Register VRegADA;
public:
SystemZMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
: SizeOfFnParams(0), VarArgsFirstGPR(0), VarArgsFirstFPR(0),
VarArgsFrameIndex(0), RegSaveFrameIndex(0), FramePointerSaveIndex(0),
NumLocalDynamics(0) {}
MachineFunctionInfo *
clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
const override;
// z/OS: Get and set the size of the expected parameter area for the
// current function. (ie. Size of param area in caller).
unsigned getSizeOfFnParams() const { return SizeOfFnParams; }
void setSizeOfFnParams(unsigned Size) { SizeOfFnParams = Size; }
// Get and set the first and last call-saved GPR that should be saved by
// this function and the SP offset for the STMG. These are 0 if no GPRs
// need to be saved or restored.
SystemZ::GPRRegs getSpillGPRRegs() const { return SpillGPRRegs; }
void setSpillGPRRegs(Register Low, Register High, unsigned Offs) {
SpillGPRRegs.LowGPR = Low;
SpillGPRRegs.HighGPR = High;
SpillGPRRegs.GPROffset = Offs;
}
// Get and set the first and last call-saved GPR that should be restored by
// this function and the SP offset for the LMG. These are 0 if no GPRs
// need to be saved or restored.
SystemZ::GPRRegs getRestoreGPRRegs() const { return RestoreGPRRegs; }
void setRestoreGPRRegs(Register Low, Register High, unsigned Offs) {
RestoreGPRRegs.LowGPR = Low;
RestoreGPRRegs.HighGPR = High;
RestoreGPRRegs.GPROffset = Offs;
}
// Get and set the number of fixed (as opposed to variable) arguments
// that are passed in GPRs to this function.
Register getVarArgsFirstGPR() const { return VarArgsFirstGPR; }
void setVarArgsFirstGPR(Register GPR) { VarArgsFirstGPR = GPR; }
// Likewise FPRs.
Register getVarArgsFirstFPR() const { return VarArgsFirstFPR; }
void setVarArgsFirstFPR(Register FPR) { VarArgsFirstFPR = FPR; }
// Get and set the frame index of the first stack vararg.
unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }
// Get and set the frame index of the register save area
// (i.e. the incoming stack pointer).
unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }
// Get and set the frame index of where the old frame pointer is stored.
int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
// Count number of local-dynamic TLS symbols used.
unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
// Get and set the function's incoming special XPLINK ABI defined ADA
// register.
Register getADAVirtualRegister() const { return VRegADA; }
void setADAVirtualRegister(Register Reg) { VRegADA = Reg; }
};
} // end namespace llvm
#endif
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