101 lines
3.8 KiB
C++
101 lines
3.8 KiB
C++
//=== SystemZMachineFunctionInfo.h - SystemZ machine function info -*- C++ -*-//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
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#include "llvm/CodeGen/MachineFunction.h"
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namespace llvm {
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namespace SystemZ {
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// A struct to hold the low and high GPR registers to be saved/restored as
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// well as the offset into the register save area of the low register.
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struct GPRRegs {
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unsigned LowGPR;
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unsigned HighGPR;
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unsigned GPROffset;
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GPRRegs() : LowGPR(0), HighGPR(0), GPROffset(0) {}
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};
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}
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class SystemZMachineFunctionInfo : public MachineFunctionInfo {
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virtual void anchor();
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SystemZ::GPRRegs SpillGPRRegs;
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SystemZ::GPRRegs RestoreGPRRegs;
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Register VarArgsFirstGPR;
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Register VarArgsFirstFPR;
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unsigned VarArgsFrameIndex;
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unsigned RegSaveFrameIndex;
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int FramePointerSaveIndex;
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bool ManipulatesSP;
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unsigned NumLocalDynamics;
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public:
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explicit SystemZMachineFunctionInfo(MachineFunction &MF)
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: VarArgsFirstGPR(0), VarArgsFirstFPR(0), VarArgsFrameIndex(0),
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RegSaveFrameIndex(0), FramePointerSaveIndex(0), ManipulatesSP(false),
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NumLocalDynamics(0) {}
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// Get and set the first and last call-saved GPR that should be saved by
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// this function and the SP offset for the STMG. These are 0 if no GPRs
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// need to be saved or restored.
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SystemZ::GPRRegs getSpillGPRRegs() const { return SpillGPRRegs; }
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void setSpillGPRRegs(Register Low, Register High, unsigned Offs) {
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SpillGPRRegs.LowGPR = Low;
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SpillGPRRegs.HighGPR = High;
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SpillGPRRegs.GPROffset = Offs;
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}
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// Get and set the first and last call-saved GPR that should be restored by
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// this function and the SP offset for the LMG. These are 0 if no GPRs
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// need to be saved or restored.
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SystemZ::GPRRegs getRestoreGPRRegs() const { return RestoreGPRRegs; }
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void setRestoreGPRRegs(Register Low, Register High, unsigned Offs) {
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RestoreGPRRegs.LowGPR = Low;
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RestoreGPRRegs.HighGPR = High;
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RestoreGPRRegs.GPROffset = Offs;
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}
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// Get and set the number of fixed (as opposed to variable) arguments
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// that are passed in GPRs to this function.
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Register getVarArgsFirstGPR() const { return VarArgsFirstGPR; }
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void setVarArgsFirstGPR(Register GPR) { VarArgsFirstGPR = GPR; }
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// Likewise FPRs.
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Register getVarArgsFirstFPR() const { return VarArgsFirstFPR; }
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void setVarArgsFirstFPR(Register FPR) { VarArgsFirstFPR = FPR; }
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// Get and set the frame index of the first stack vararg.
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unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }
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// Get and set the frame index of the register save area
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// (i.e. the incoming stack pointer).
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unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
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void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }
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// Get and set the frame index of where the old frame pointer is stored.
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int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
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void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }
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// Get and set whether the function directly manipulates the stack pointer,
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// e.g. through STACKSAVE or STACKRESTORE.
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bool getManipulatesSP() const { return ManipulatesSP; }
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void setManipulatesSP(bool MSP) { ManipulatesSP = MSP; }
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// Count number of local-dynamic TLS symbols used.
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unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
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void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
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};
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} // end namespace llvm
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#endif
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