llvm/llvm/lib/Target/X86/X86CallingConv.cpp

//=== X86CallingConv.cpp - X86 Custom Calling Convention Impl   -*- 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 implementation of custom routines for the X86
// Calling Convention that aren't done by tablegen.
//
//===----------------------------------------------------------------------===//

#include "X86CallingConv.h"
#include "X86Subtarget.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Module.h"

usingnamespacellvm;

/// When regcall calling convention compiled to 32 bit arch, special treatment
/// is required for 64 bit masks.
/// The value should be assigned to two GPRs.
/// \return true if registers were allocated and false otherwise.
static bool CC_X86_32_RegCall_Assign2Regs(unsigned &ValNo, MVT &ValVT,
                                          MVT &LocVT,
                                          CCValAssign::LocInfo &LocInfo,
                                          ISD::ArgFlagsTy &ArgFlags,
                                          CCState &State) { … }

static ArrayRef<MCPhysReg> CC_X86_VectorCallGetSSEs(const MVT &ValVT) { … }

static ArrayRef<MCPhysReg> CC_X86_64_VectorCallGetGPRs() { … }

static bool CC_X86_VectorCallAssignRegister(unsigned &ValNo, MVT &ValVT,
                                            MVT &LocVT,
                                            CCValAssign::LocInfo &LocInfo,
                                            ISD::ArgFlagsTy &ArgFlags,
                                            CCState &State) { … }

/// Vectorcall calling convention has special handling for vector types or
/// HVA for 64 bit arch.
/// For HVAs shadow registers might be allocated on the first pass
/// and actual XMM registers are allocated on the second pass.
/// For vector types, actual XMM registers are allocated on the first pass.
/// \return true if registers were allocated and false otherwise.
static bool CC_X86_64_VectorCall(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                                 CCValAssign::LocInfo &LocInfo,
                                 ISD::ArgFlagsTy &ArgFlags, CCState &State) { … }

/// Vectorcall calling convention has special handling for vector types or
/// HVA for 32 bit arch.
/// For HVAs actual XMM registers are allocated on the second pass.
/// For vector types, actual XMM registers are allocated on the first pass.
/// \return true if registers were allocated and false otherwise.
static bool CC_X86_32_VectorCall(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                                 CCValAssign::LocInfo &LocInfo,
                                 ISD::ArgFlagsTy &ArgFlags, CCState &State) { … }

static bool CC_X86_AnyReg_Error(unsigned &, MVT &, MVT &,
                                CCValAssign::LocInfo &, ISD::ArgFlagsTy &,
                                CCState &) { … }

static bool CC_X86_32_MCUInReg(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                               CCValAssign::LocInfo &LocInfo,
                               ISD::ArgFlagsTy &ArgFlags, CCState &State) { … }

/// X86 interrupt handlers can only take one or two stack arguments, but if
/// there are two arguments, they are in the opposite order from the standard
/// convention. Therefore, we have to look at the argument count up front before
/// allocating stack for each argument.
static bool CC_X86_Intr(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                        CCValAssign::LocInfo &LocInfo,
                        ISD::ArgFlagsTy &ArgFlags, CCState &State) { … }

static bool CC_X86_64_Pointer(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
                              CCValAssign::LocInfo &LocInfo,
                              ISD::ArgFlagsTy &ArgFlags, CCState &State) { … }

// Provides entry points of CC_X86 and RetCC_X86.
#include "X86GenCallingConv.inc"