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llvm-project/clang/lib/Driver/ToolChains/Hexagon.cpp

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//===--- Hexagon.cpp - Hexagon ToolChain Implementations --------*- 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 "Hexagon.h"
#include "CommonArgs.h"
#include "InputInfo.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/VirtualFileSystem.h"
using namespace clang::driver;
using namespace clang::driver::tools;
using namespace clang::driver::toolchains;
using namespace clang;
using namespace llvm::opt;
// Default hvx-length for various versions.
static StringRef getDefaultHvxLength(StringRef Cpu) {
return llvm::StringSwitch<StringRef>(Cpu)
.Case("v60", "64b")
.Case("v62", "64b")
.Case("v65", "64b")
.Default("128b");
}
static void handleHVXWarnings(const Driver &D, const ArgList &Args) {
// Handle the unsupported values passed to mhvx-length.
if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) {
StringRef Val = A->getValue();
if (!Val.equals_lower("64b") && !Val.equals_lower("128b"))
D.Diag(diag::err_drv_unsupported_option_argument)
<< A->getOption().getName() << Val;
}
}
// Handle hvx target features explicitly.
static void handleHVXTargetFeatures(const Driver &D, const ArgList &Args,
std::vector<StringRef> &Features,
StringRef Cpu, bool &HasHVX) {
// Handle HVX warnings.
handleHVXWarnings(D, Args);
// Add the +hvx* features based on commandline flags.
StringRef HVXFeature, HVXLength;
// Handle -mhvx, -mhvx=, -mno-hvx.
if (Arg *A = Args.getLastArg(options::OPT_mno_hexagon_hvx,
options::OPT_mhexagon_hvx,
options::OPT_mhexagon_hvx_EQ)) {
if (A->getOption().matches(options::OPT_mno_hexagon_hvx))
return;
if (A->getOption().matches(options::OPT_mhexagon_hvx_EQ)) {
HasHVX = true;
HVXFeature = Cpu = A->getValue();
HVXFeature = Args.MakeArgString(llvm::Twine("+hvx") + HVXFeature.lower());
} else if (A->getOption().matches(options::OPT_mhexagon_hvx)) {
HasHVX = true;
HVXFeature = Args.MakeArgString(llvm::Twine("+hvx") + Cpu);
}
Features.push_back(HVXFeature);
}
// Handle -mhvx-length=.
if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) {
// These flags are valid only if HVX in enabled.
if (!HasHVX)
D.Diag(diag::err_drv_invalid_hvx_length);
else if (A->getOption().matches(options::OPT_mhexagon_hvx_length_EQ))
HVXLength = A->getValue();
}
// Default hvx-length based on Cpu.
else if (HasHVX)
HVXLength = getDefaultHvxLength(Cpu);
if (!HVXLength.empty()) {
HVXFeature =
Args.MakeArgString(llvm::Twine("+hvx-length") + HVXLength.lower());
Features.push_back(HVXFeature);
}
}
// Hexagon target features.
void hexagon::getHexagonTargetFeatures(const Driver &D, const ArgList &Args,
std::vector<StringRef> &Features) {
handleTargetFeaturesGroup(Args, Features,
options::OPT_m_hexagon_Features_Group);
bool UseLongCalls = false;
if (Arg *A = Args.getLastArg(options::OPT_mlong_calls,
options::OPT_mno_long_calls)) {
if (A->getOption().matches(options::OPT_mlong_calls))
UseLongCalls = true;
}
Features.push_back(UseLongCalls ? "+long-calls" : "-long-calls");
bool HasHVX = false;
StringRef Cpu(toolchains::HexagonToolChain::GetTargetCPUVersion(Args));
// 't' in Cpu denotes tiny-core micro-architecture. For now, the co-processors
// have no dependency on micro-architecture.
const bool TinyCore = Cpu.contains('t');
if (TinyCore)
Cpu = Cpu.take_front(Cpu.size() - 1);
handleHVXTargetFeatures(D, Args, Features, Cpu, HasHVX);
if (HexagonToolChain::isAutoHVXEnabled(Args) && !HasHVX)
D.Diag(diag::warn_drv_vectorize_needs_hvx);
}
// Hexagon tools start.
void hexagon::Assembler::RenderExtraToolArgs(const JobAction &JA,
ArgStringList &CmdArgs) const {
}
void hexagon::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
claimNoWarnArgs(Args);
auto &HTC = static_cast<const toolchains::HexagonToolChain&>(getToolChain());
const Driver &D = HTC.getDriver();
ArgStringList CmdArgs;
CmdArgs.push_back("--arch=hexagon");
RenderExtraToolArgs(JA, CmdArgs);
const char *AsName = "llvm-mc";
CmdArgs.push_back("-filetype=obj");
CmdArgs.push_back(Args.MakeArgString(
"-mcpu=hexagon" +
toolchains::HexagonToolChain::GetTargetCPUVersion(Args)));
if (Output.isFilename()) {
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
} else {
assert(Output.isNothing() && "Unexpected output");
CmdArgs.push_back("-fsyntax-only");
}
if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) {
CmdArgs.push_back(Args.MakeArgString("-gpsize=" + Twine(G.getValue())));
}
Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
// Only pass -x if gcc will understand it; otherwise hope gcc
// understands the suffix correctly. The main use case this would go
// wrong in is for linker inputs if they happened to have an odd
// suffix; really the only way to get this to happen is a command
// like '-x foobar a.c' which will treat a.c like a linker input.
//
// FIXME: For the linker case specifically, can we safely convert
// inputs into '-Wl,' options?
for (const auto &II : Inputs) {
// Don't try to pass LLVM or AST inputs to a generic gcc.
if (types::isLLVMIR(II.getType()))
D.Diag(clang::diag::err_drv_no_linker_llvm_support)
<< HTC.getTripleString();
else if (II.getType() == types::TY_AST)
D.Diag(clang::diag::err_drv_no_ast_support)
<< HTC.getTripleString();
else if (II.getType() == types::TY_ModuleFile)
D.Diag(diag::err_drv_no_module_support)
<< HTC.getTripleString();
if (II.isFilename())
CmdArgs.push_back(II.getFilename());
else
// Don't render as input, we need gcc to do the translations.
// FIXME: What is this?
II.getInputArg().render(Args, CmdArgs);
}
auto *Exec = Args.MakeArgString(HTC.GetProgramPath(AsName));
C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
}
void hexagon::Linker::RenderExtraToolArgs(const JobAction &JA,
ArgStringList &CmdArgs) const {
}
static void
constructHexagonLinkArgs(Compilation &C, const JobAction &JA,
const toolchains::HexagonToolChain &HTC,
const InputInfo &Output, const InputInfoList &Inputs,
const ArgList &Args, ArgStringList &CmdArgs,
const char *LinkingOutput) {
const Driver &D = HTC.getDriver();
//----------------------------------------------------------------------------
//
//----------------------------------------------------------------------------
bool IsStatic = Args.hasArg(options::OPT_static);
bool IsShared = Args.hasArg(options::OPT_shared);
bool IsPIE = Args.hasArg(options::OPT_pie);
bool IncStdLib = !Args.hasArg(options::OPT_nostdlib);
bool IncStartFiles = !Args.hasArg(options::OPT_nostartfiles);
bool IncDefLibs = !Args.hasArg(options::OPT_nodefaultlibs);
bool UseG0 = false;
const char *Exec = Args.MakeArgString(HTC.GetLinkerPath());
bool UseLLD = (llvm::sys::path::filename(Exec).equals_lower("ld.lld") ||
llvm::sys::path::stem(Exec).equals_lower("ld.lld"));
bool UseShared = IsShared && !IsStatic;
StringRef CpuVer = toolchains::HexagonToolChain::GetTargetCPUVersion(Args);
//----------------------------------------------------------------------------
// Silence warnings for various options
//----------------------------------------------------------------------------
Args.ClaimAllArgs(options::OPT_g_Group);
Args.ClaimAllArgs(options::OPT_emit_llvm);
Args.ClaimAllArgs(options::OPT_w); // Other warning options are already
// handled somewhere else.
Args.ClaimAllArgs(options::OPT_static_libgcc);
//----------------------------------------------------------------------------
//
//----------------------------------------------------------------------------
if (Args.hasArg(options::OPT_s))
CmdArgs.push_back("-s");
if (Args.hasArg(options::OPT_r))
CmdArgs.push_back("-r");
for (const auto &Opt : HTC.ExtraOpts)
CmdArgs.push_back(Opt.c_str());
if (!UseLLD) {
CmdArgs.push_back("-march=hexagon");
CmdArgs.push_back(Args.MakeArgString("-mcpu=hexagon" + CpuVer));
}
if (IsShared) {
CmdArgs.push_back("-shared");
// The following should be the default, but doing as hexagon-gcc does.
CmdArgs.push_back("-call_shared");
}
if (IsStatic)
CmdArgs.push_back("-static");
if (IsPIE && !IsShared)
CmdArgs.push_back("-pie");
if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) {
CmdArgs.push_back(Args.MakeArgString("-G" + Twine(G.getValue())));
UseG0 = G.getValue() == 0;
}
//----------------------------------------------------------------------------
//
//----------------------------------------------------------------------------
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
//----------------------------------------------------------------------------
// moslib
//----------------------------------------------------------------------------
std::vector<std::string> OsLibs;
bool HasStandalone = false;
for (const Arg *A : Args.filtered(options::OPT_moslib_EQ)) {
A->claim();
OsLibs.emplace_back(A->getValue());
HasStandalone = HasStandalone || (OsLibs.back() == "standalone");
}
if (OsLibs.empty()) {
OsLibs.push_back("standalone");
HasStandalone = true;
}
//----------------------------------------------------------------------------
// Start Files
//----------------------------------------------------------------------------
const std::string MCpuSuffix = "/" + CpuVer.str();
const std::string MCpuG0Suffix = MCpuSuffix + "/G0";
const std::string RootDir =
HTC.getHexagonTargetDir(D.InstalledDir, D.PrefixDirs) + "/";
const std::string StartSubDir =
"hexagon/lib" + (UseG0 ? MCpuG0Suffix : MCpuSuffix);
auto Find = [&HTC] (const std::string &RootDir, const std::string &SubDir,
const char *Name) -> std::string {
std::string RelName = SubDir + Name;
std::string P = HTC.GetFilePath(RelName.c_str());
if (llvm::sys::fs::exists(P))
return P;
return RootDir + RelName;
};
if (IncStdLib && IncStartFiles) {
if (!IsShared) {
if (HasStandalone) {
std::string Crt0SA = Find(RootDir, StartSubDir, "/crt0_standalone.o");
CmdArgs.push_back(Args.MakeArgString(Crt0SA));
}
std::string Crt0 = Find(RootDir, StartSubDir, "/crt0.o");
CmdArgs.push_back(Args.MakeArgString(Crt0));
}
std::string Init = UseShared
? Find(RootDir, StartSubDir + "/pic", "/initS.o")
: Find(RootDir, StartSubDir, "/init.o");
CmdArgs.push_back(Args.MakeArgString(Init));
}
//----------------------------------------------------------------------------
// Library Search Paths
//----------------------------------------------------------------------------
const ToolChain::path_list &LibPaths = HTC.getFilePaths();
for (const auto &LibPath : LibPaths)
CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
//----------------------------------------------------------------------------
//
//----------------------------------------------------------------------------
Args.AddAllArgs(CmdArgs,
{options::OPT_T_Group, options::OPT_e, options::OPT_s,
options::OPT_t, options::OPT_u_Group});
AddLinkerInputs(HTC, Inputs, Args, CmdArgs, JA);
//----------------------------------------------------------------------------
// Libraries
//----------------------------------------------------------------------------
if (IncStdLib && IncDefLibs) {
if (D.CCCIsCXX()) {
if (HTC.ShouldLinkCXXStdlib(Args))
HTC.AddCXXStdlibLibArgs(Args, CmdArgs);
CmdArgs.push_back("-lm");
}
CmdArgs.push_back("--start-group");
if (!IsShared) {
for (StringRef Lib : OsLibs)
CmdArgs.push_back(Args.MakeArgString("-l" + Lib));
CmdArgs.push_back("-lc");
}
CmdArgs.push_back("-lgcc");
CmdArgs.push_back("--end-group");
}
//----------------------------------------------------------------------------
// End files
//----------------------------------------------------------------------------
if (IncStdLib && IncStartFiles) {
std::string Fini = UseShared
? Find(RootDir, StartSubDir + "/pic", "/finiS.o")
: Find(RootDir, StartSubDir, "/fini.o");
CmdArgs.push_back(Args.MakeArgString(Fini));
}
}
void hexagon::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
auto &HTC = static_cast<const toolchains::HexagonToolChain&>(getToolChain());
ArgStringList CmdArgs;
constructHexagonLinkArgs(C, JA, HTC, Output, Inputs, Args, CmdArgs,
LinkingOutput);
const char *Exec = Args.MakeArgString(HTC.GetLinkerPath());
C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
}
// Hexagon tools end.
/// Hexagon Toolchain
std::string HexagonToolChain::getHexagonTargetDir(
const std::string &InstalledDir,
const SmallVectorImpl<std::string> &PrefixDirs) const {
std::string InstallRelDir;
const Driver &D = getDriver();
// Locate the rest of the toolchain ...
for (auto &I : PrefixDirs)
if (D.getVFS().exists(I))
return I;
if (getVFS().exists(InstallRelDir = InstalledDir + "/../target"))
return InstallRelDir;
return InstalledDir;
}
Optional<unsigned> HexagonToolChain::getSmallDataThreshold(
const ArgList &Args) {
StringRef Gn = "";
if (Arg *A = Args.getLastArg(options::OPT_G)) {
Gn = A->getValue();
} else if (Args.getLastArg(options::OPT_shared, options::OPT_fpic,
options::OPT_fPIC)) {
Gn = "0";
}
unsigned G;
if (!Gn.getAsInteger(10, G))
return G;
return None;
}
void HexagonToolChain::getHexagonLibraryPaths(const ArgList &Args,
ToolChain::path_list &LibPaths) const {
const Driver &D = getDriver();
//----------------------------------------------------------------------------
// -L Args
//----------------------------------------------------------------------------
for (Arg *A : Args.filtered(options::OPT_L))
for (const char *Value : A->getValues())
LibPaths.push_back(Value);
//----------------------------------------------------------------------------
// Other standard paths
//----------------------------------------------------------------------------
std::vector<std::string> RootDirs;
std::copy(D.PrefixDirs.begin(), D.PrefixDirs.end(),
std::back_inserter(RootDirs));
std::string TargetDir = getHexagonTargetDir(D.getInstalledDir(),
D.PrefixDirs);
if (llvm::find(RootDirs, TargetDir) == RootDirs.end())
RootDirs.push_back(TargetDir);
bool HasPIC = Args.hasArg(options::OPT_fpic, options::OPT_fPIC);
// Assume G0 with -shared.
bool HasG0 = Args.hasArg(options::OPT_shared);
if (auto G = getSmallDataThreshold(Args))
HasG0 = G.getValue() == 0;
const std::string CpuVer = GetTargetCPUVersion(Args).str();
for (auto &Dir : RootDirs) {
std::string LibDir = Dir + "/hexagon/lib";
std::string LibDirCpu = LibDir + '/' + CpuVer;
if (HasG0) {
if (HasPIC)
LibPaths.push_back(LibDirCpu + "/G0/pic");
LibPaths.push_back(LibDirCpu + "/G0");
}
LibPaths.push_back(LibDirCpu);
LibPaths.push_back(LibDir);
}
}
HexagonToolChain::HexagonToolChain(const Driver &D, const llvm::Triple &Triple,
const llvm::opt::ArgList &Args)
: Linux(D, Triple, Args) {
const std::string TargetDir = getHexagonTargetDir(D.getInstalledDir(),
D.PrefixDirs);
// Note: Generic_GCC::Generic_GCC adds InstalledDir and getDriver().Dir to
// program paths
const std::string BinDir(TargetDir + "/bin");
if (D.getVFS().exists(BinDir))
getProgramPaths().push_back(BinDir);
ToolChain::path_list &LibPaths = getFilePaths();
// Remove paths added by Linux toolchain. Currently Hexagon_TC really targets
// 'elf' OS type, so the Linux paths are not appropriate. When we actually
// support 'linux' we'll need to fix this up
LibPaths.clear();
getHexagonLibraryPaths(Args, LibPaths);
}
HexagonToolChain::~HexagonToolChain() {}
Tool *HexagonToolChain::buildAssembler() const {
return new tools::hexagon::Assembler(*this);
}
Tool *HexagonToolChain::buildLinker() const {
return new tools::hexagon::Linker(*this);
}
unsigned HexagonToolChain::getOptimizationLevel(
const llvm::opt::ArgList &DriverArgs) const {
// Copied in large part from lib/Frontend/CompilerInvocation.cpp.
Arg *A = DriverArgs.getLastArg(options::OPT_O_Group);
if (!A)
return 0;
if (A->getOption().matches(options::OPT_O0))
return 0;
if (A->getOption().matches(options::OPT_Ofast) ||
A->getOption().matches(options::OPT_O4))
return 3;
assert(A->getNumValues() != 0);
StringRef S(A->getValue());
if (S == "s" || S == "z" || S.empty())
return 2;
if (S == "g")
return 1;
unsigned OptLevel;
if (S.getAsInteger(10, OptLevel))
return 0;
return OptLevel;
}
void HexagonToolChain::addClangTargetOptions(const ArgList &DriverArgs,
ArgStringList &CC1Args,
Action::OffloadKind) const {
if (DriverArgs.hasArg(options::OPT_ffixed_r19)) {
CC1Args.push_back("-target-feature");
CC1Args.push_back("+reserved-r19");
}
if (isAutoHVXEnabled(DriverArgs)) {
CC1Args.push_back("-mllvm");
CC1Args.push_back("-hexagon-autohvx");
}
}
void HexagonToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
if (DriverArgs.hasArg(options::OPT_nostdinc) ||
DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
const Driver &D = getDriver();
std::string TargetDir = getHexagonTargetDir(D.getInstalledDir(),
D.PrefixDirs);
addExternCSystemInclude(DriverArgs, CC1Args, TargetDir + "/hexagon/include");
}
void HexagonToolChain::addLibStdCxxIncludePaths(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const {
const Driver &D = getDriver();
std::string TargetDir = getHexagonTargetDir(D.InstalledDir, D.PrefixDirs);
addLibStdCXXIncludePaths(TargetDir, "/hexagon/include/c++", "", "", "", "",
DriverArgs, CC1Args);
}
ToolChain::CXXStdlibType
HexagonToolChain::GetCXXStdlibType(const ArgList &Args) const {
Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
if (!A)
return ToolChain::CST_Libstdcxx;
StringRef Value = A->getValue();
if (Value != "libstdc++")
getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args);
return ToolChain::CST_Libstdcxx;
}
bool HexagonToolChain::isAutoHVXEnabled(const llvm::opt::ArgList &Args) {
if (Arg *A = Args.getLastArg(options::OPT_fvectorize,
options::OPT_fno_vectorize))
return A->getOption().matches(options::OPT_fvectorize);
return false;
}
//
// Returns the default CPU for Hexagon. This is the default compilation target
// if no Hexagon processor is selected at the command-line.
//
const StringRef HexagonToolChain::GetDefaultCPU() {
return "hexagonv60";
}
const StringRef HexagonToolChain::GetTargetCPUVersion(const ArgList &Args) {
Arg *CpuArg = nullptr;
if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
CpuArg = A;
StringRef CPU = CpuArg ? CpuArg->getValue() : GetDefaultCPU();
if (CPU.startswith("hexagon"))
return CPU.substr(sizeof("hexagon") - 1);
return CPU;
}
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