llvm/llvm/lib/Target/ARM/ARMCallingConv.cpp

//=== ARMCallingConv.cpp - ARM Custom CC Routines ---------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file contains the custom routines for the ARM Calling Convention that
// aren't done by tablegen, and includes the table generated implementations.
//
//===----------------------------------------------------------------------===//

#include "ARM.h"
#include "ARMCallingConv.h"
#include "ARMSubtarget.h"
#include "ARMRegisterInfo.h"
usingnamespacellvm;

// APCS f64 is in register pairs, possibly split to stack
static bool f64AssignAPCS(unsigned ValNo, MVT ValVT, MVT LocVT,
                          CCValAssign::LocInfo LocInfo,
                          CCState &State, bool CanFail) { … }

static bool CC_ARM_APCS_Custom_f64(unsigned ValNo, MVT ValVT, MVT LocVT,
                                   CCValAssign::LocInfo LocInfo,
                                   ISD::ArgFlagsTy ArgFlags,
                                   CCState &State) { … }

// AAPCS f64 is in aligned register pairs
static bool f64AssignAAPCS(unsigned ValNo, MVT ValVT, MVT LocVT,
                           CCValAssign::LocInfo LocInfo,
                           CCState &State, bool CanFail) { … }

static bool CC_ARM_AAPCS_Custom_f64(unsigned ValNo, MVT ValVT, MVT LocVT,
                                    CCValAssign::LocInfo LocInfo,
                                    ISD::ArgFlagsTy ArgFlags,
                                    CCState &State) { … }

static bool f64RetAssign(unsigned ValNo, MVT ValVT, MVT LocVT,
                         CCValAssign::LocInfo LocInfo, CCState &State) { … }

static bool RetCC_ARM_APCS_Custom_f64(unsigned ValNo, MVT ValVT, MVT LocVT,
                                      CCValAssign::LocInfo LocInfo,
                                      ISD::ArgFlagsTy ArgFlags,
                                      CCState &State) { … }

static bool RetCC_ARM_AAPCS_Custom_f64(unsigned ValNo, MVT ValVT, MVT LocVT,
                                       CCValAssign::LocInfo LocInfo,
                                       ISD::ArgFlagsTy ArgFlags,
                                       CCState &State) { … }

static const MCPhysReg RRegList[] = …;

static const MCPhysReg SRegList[] = …;
static const MCPhysReg DRegList[] = …;
static const MCPhysReg QRegList[] = …;


// Allocate part of an AAPCS HFA or HVA. We assume that each member of the HA
// has InConsecutiveRegs set, and that the last member also has
// InConsecutiveRegsLast set. We must process all members of the HA before
// we can allocate it, as we need to know the total number of registers that
// will be needed in order to (attempt to) allocate a contiguous block.
static bool CC_ARM_AAPCS_Custom_Aggregate(unsigned ValNo, MVT ValVT,
                                          MVT LocVT,
                                          CCValAssign::LocInfo LocInfo,
                                          ISD::ArgFlagsTy ArgFlags,
                                          CCState &State) { … }

static bool CustomAssignInRegList(unsigned ValNo, MVT ValVT, MVT LocVT,
                                  CCValAssign::LocInfo LocInfo, CCState &State,
                                  ArrayRef<MCPhysReg> RegList) { … }

static bool CC_ARM_AAPCS_Custom_f16(unsigned ValNo, MVT ValVT, MVT LocVT,
                                    CCValAssign::LocInfo LocInfo,
                                    ISD::ArgFlagsTy ArgFlags, CCState &State) { … }

static bool CC_ARM_AAPCS_VFP_Custom_f16(unsigned ValNo, MVT ValVT, MVT LocVT,
                                        CCValAssign::LocInfo LocInfo,
                                        ISD::ArgFlagsTy ArgFlags,
                                        CCState &State) { … }

// Include the table generated calling convention implementations.
#include "ARMGenCallingConv.inc"