llvm/llvm/lib/Target/SystemZ/SystemZCallingConv.h

//===-- SystemZCallingConv.h - Calling conventions for SystemZ --*- 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_SYSTEMZCALLINGCONV_H
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCALLINGCONV_H

#include "SystemZSubtarget.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/MC/MCRegisterInfo.h"

namespace llvm {
namespace SystemZ {
  const unsigned ELFNumArgGPRs = …;
  extern const MCPhysReg ELFArgGPRs[ELFNumArgGPRs];

  const unsigned ELFNumArgFPRs = …;
  extern const MCPhysReg ELFArgFPRs[ELFNumArgFPRs];

  const unsigned XPLINK64NumArgGPRs = …;
  extern const MCPhysReg XPLINK64ArgGPRs[XPLINK64NumArgGPRs];

  const unsigned XPLINK64NumArgFPRs = …;
  extern const MCPhysReg XPLINK64ArgFPRs[XPLINK64NumArgFPRs];
} // end namespace SystemZ

class SystemZCCState : public CCState { … };

// Handle i128 argument types.  These need to be passed by implicit
// reference.  This could be as simple as the following .td line:
//    CCIfType<[i128], CCPassIndirect<i64>>,
// except that i128 is not a legal type, and therefore gets split by
// common code into a pair of i64 arguments.
inline bool CC_SystemZ_I128Indirect(unsigned &ValNo, MVT &ValVT,
                                    MVT &LocVT,
                                    CCValAssign::LocInfo &LocInfo,
                                    ISD::ArgFlagsTy &ArgFlags,
                                    CCState &State) { … }

// A pointer in 64bit mode is always passed as 64bit.
inline bool CC_XPLINK64_Pointer(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                                CCValAssign::LocInfo &LocInfo,
                                ISD::ArgFlagsTy &ArgFlags, CCState &State) { … }

inline bool CC_XPLINK64_Shadow_Reg(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                                   CCValAssign::LocInfo &LocInfo,
                                   ISD::ArgFlagsTy &ArgFlags, CCState &State) { … }

inline bool CC_XPLINK64_Allocate128BitVararg(unsigned &ValNo, MVT &ValVT,
                                             MVT &LocVT,
                                             CCValAssign::LocInfo &LocInfo,
                                             ISD::ArgFlagsTy &ArgFlags,
                                             CCState &State) { … }

inline bool RetCC_SystemZ_Error(unsigned &, MVT &, MVT &,
                                CCValAssign::LocInfo &, ISD::ArgFlagsTy &,
                                CCState &) { … }

inline bool CC_SystemZ_Error(unsigned &, MVT &, MVT &, CCValAssign::LocInfo &,
                             ISD::ArgFlagsTy &, CCState &) { … }

inline bool CC_SystemZ_GHC_Error(unsigned &, MVT &, MVT &,
                                 CCValAssign::LocInfo &, ISD::ArgFlagsTy &,
                                 CCState &) { … }

} // end namespace llvm

#endif