ARM.cpp | Explore in Territory

//===--- ARM.cpp - ARM (not AArch64) Helpers for Tools ----------*- 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
//
//===----------------------------------------------------------------------===//

#include "ARM.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Option/ArgList.h"
#include "llvm/TargetParser/ARMTargetParser.h"
#include "llvm/TargetParser/Host.h"

usingnamespaceclang::driver;
usingnamespaceclang::driver::tools;
usingnamespaceclang;
usingnamespacellvm::opt;

// Get SubArch (vN).
int arm::getARMSubArchVersionNumber(const llvm::Triple &Triple) { … }

// True if M-profile.
bool arm::isARMMProfile(const llvm::Triple &Triple) { … }

// On Arm the endianness of the output file is determined by the target and
// can be overridden by the pseudo-target flags '-mlittle-endian'/'-EL' and
// '-mbig-endian'/'-EB'. Unlike other targets the flag does not result in a
// normalized triple so we must handle the flag here.
bool arm::isARMBigEndian(const llvm::Triple &Triple, const ArgList &Args) { … }

// True if A-profile.
bool arm::isARMAProfile(const llvm::Triple &Triple) { … }

// Get Arch/CPU from args.
void arm::getARMArchCPUFromArgs(const ArgList &Args, llvm::StringRef &Arch,
                                llvm::StringRef &CPU, bool FromAs) { … }

// Handle -mhwdiv=.
// FIXME: Use ARMTargetParser.
static void getARMHWDivFeatures(const Driver &D, const Arg *A,
                                const ArgList &Args, StringRef HWDiv,
                                std::vector<StringRef> &Features) { … }

// Handle -mfpu=.
static llvm::ARM::FPUKind getARMFPUFeatures(const Driver &D, const Arg *A,
                                            const ArgList &Args, StringRef FPU,
                                            std::vector<StringRef> &Features) { … }

// Decode ARM features from string like +[no]featureA+[no]featureB+...
static bool DecodeARMFeatures(const Driver &D, StringRef text, StringRef CPU,
                              llvm::ARM::ArchKind ArchKind,
                              std::vector<StringRef> &Features,
                              llvm::ARM::FPUKind &ArgFPUKind) { … }

static void DecodeARMFeaturesFromCPU(const Driver &D, StringRef CPU,
                                     std::vector<StringRef> &Features) { … }

// Check if -march is valid by checking if it can be canonicalised and parsed.
// getARMArch is used here instead of just checking the -march value in order
// to handle -march=native correctly.
static void checkARMArchName(const Driver &D, const Arg *A, const ArgList &Args,
                             llvm::StringRef ArchName, llvm::StringRef CPUName,
                             std::vector<StringRef> &Features,
                             const llvm::Triple &Triple,
                             llvm::ARM::FPUKind &ArgFPUKind) { … }

// Check -mcpu=. Needs ArchName to handle -mcpu=generic.
static void checkARMCPUName(const Driver &D, const Arg *A, const ArgList &Args,
                            llvm::StringRef CPUName, llvm::StringRef ArchName,
                            std::vector<StringRef> &Features,
                            const llvm::Triple &Triple,
                            llvm::ARM::FPUKind &ArgFPUKind) { … }

// If -mfloat-abi=hard or -mhard-float are specified explicitly then check that
// floating point registers are available on the target CPU.
static void checkARMFloatABI(const Driver &D, const ArgList &Args,
                             bool HasFPRegs) { … }

bool arm::useAAPCSForMachO(const llvm::Triple &T) { … }

// We follow GCC and support when the backend has support for the MRC/MCR
// instructions that are used to set the hard thread pointer ("CP15 C13
// Thread id").
bool arm::isHardTPSupported(const llvm::Triple &Triple) { … }

// Select mode for reading thread pointer (-mtp=soft/cp15).
arm::ReadTPMode arm::getReadTPMode(const Driver &D, const ArgList &Args,
                                   const llvm::Triple &Triple, bool ForAS) { … }

void arm::setArchNameInTriple(const Driver &D, const ArgList &Args,
                              types::ID InputType, llvm::Triple &Triple) { … }

void arm::setFloatABIInTriple(const Driver &D, const ArgList &Args,
                              llvm::Triple &Triple) { … }

arm::FloatABI arm::getARMFloatABI(const ToolChain &TC, const ArgList &Args) { … }

arm::FloatABI arm::getDefaultFloatABI(const llvm::Triple &Triple) { … }

// Select the float ABI as determined by -msoft-float, -mhard-float, and
// -mfloat-abi=.
arm::FloatABI arm::getARMFloatABI(const Driver &D, const llvm::Triple &Triple,
                                  const ArgList &Args) { … }

static bool hasIntegerMVE(const std::vector<StringRef> &F) { … }

llvm::ARM::FPUKind arm::getARMTargetFeatures(const Driver &D,
                                             const llvm::Triple &Triple,
                                             const ArgList &Args,
                                             std::vector<StringRef> &Features,
                                             bool ForAS, bool ForMultilib) { … }

std::string arm::getARMArch(StringRef Arch, const llvm::Triple &Triple) { … }

/// Get the (LLVM) name of the minimum ARM CPU for the arch we are targeting.
StringRef arm::getARMCPUForMArch(StringRef Arch, const llvm::Triple &Triple) { … }

/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
std::string arm::getARMTargetCPU(StringRef CPU, StringRef Arch,
                                 const llvm::Triple &Triple) { … }

/// getLLVMArchSuffixForARM - Get the LLVM ArchKind value to use for a
/// particular CPU (or Arch, if CPU is generic). This is needed to
/// pass to functions like llvm::ARM::getDefaultFPU which need an
/// ArchKind as well as a CPU name.
llvm::ARM::ArchKind arm::getLLVMArchKindForARM(StringRef CPU, StringRef Arch,
                                               const llvm::Triple &Triple) { … }

/// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular
/// CPU  (or Arch, if CPU is generic).
// FIXME: This is redundant with -mcpu, why does LLVM use this.
StringRef arm::getLLVMArchSuffixForARM(StringRef CPU, StringRef Arch,
                                       const llvm::Triple &Triple) { … }

void arm::appendBE8LinkFlag(const ArgList &Args, ArgStringList &CmdArgs,
                            const llvm::Triple &Triple) { … }
llvm/clang/lib/Driver/ToolChains/Arch/ARM.cpp
