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llvm-project/clang/lib/Driver/ToolChains/Hexagon.cpp
Serge Pavlov 70bf35070a [Driver] Add output file to properties of Command 
Object of class `Command` contains various properties of a command to
execute, but output file was missed from them. This change adds this
property. It is required for reporting consumed time and memory implemented
in D78903 and may be used in other cases too.

Differential Revision: https://reviews.llvm.org/D78902
2020-10-08 18:23:39 +07:00

682 lines
24 KiB
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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,
ResponseFileSupport::AtFileCurCP(),
Exec, CmdArgs, Inputs, Output));
}
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());
if (HTC.getTriple().isMusl()) {
if (!Args.hasArg(options::OPT_shared, options::OPT_static))
CmdArgs.push_back("-dynamic-linker=/lib/ld-musl-hexagon.so.1");
if (!Args.hasArg(options::OPT_shared, options::OPT_nostartfiles,
options::OPT_nostdlib))
CmdArgs.push_back(Args.MakeArgString(D.SysRoot + "/usr/lib/crt1.o"));
else if (Args.hasArg(options::OPT_shared) &&
!Args.hasArg(options::OPT_nostartfiles, options::OPT_nostdlib))
CmdArgs.push_back(Args.MakeArgString(D.SysRoot + "/usr/lib/crti.o"));
CmdArgs.push_back(
Args.MakeArgString(StringRef("-L") + D.SysRoot + "/usr/lib"));
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);
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
CmdArgs.push_back("-lclang_rt.builtins-hexagon");
CmdArgs.push_back("-lc");
}
if (D.CCCIsCXX()) {
if (HTC.ShouldLinkCXXStdlib(Args))
HTC.AddCXXStdlibLibArgs(Args, CmdArgs);
}
return;
}
//----------------------------------------------------------------------------
// 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,
ResponseFileSupport::AtFileCurCP(),
Exec, CmdArgs, Inputs, Output));
}
// 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() {}
void HexagonToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
CXXStdlibType Type = GetCXXStdlibType(Args);
switch (Type) {
case ToolChain::CST_Libcxx:
CmdArgs.push_back("-lc++");
CmdArgs.push_back("-lc++abi");
CmdArgs.push_back("-lunwind");
break;
case ToolChain::CST_Libstdcxx:
CmdArgs.push_back("-lstdc++");
break;
}
}
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 {
bool UseInitArrayDefault = getTriple().isMusl();
if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
options::OPT_fno_use_init_array,
UseInitArrayDefault))
CC1Args.push_back("-fno-use-init-array");
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();
if (!D.SysRoot.empty()) {
SmallString<128> P(D.SysRoot);
if (getTriple().isMusl())
llvm::sys::path::append(P, "usr/include");
else
llvm::sys::path::append(P, "include");
addExternCSystemInclude(DriverArgs, CC1Args, P.str());
return;
}
std::string TargetDir = getHexagonTargetDir(D.getInstalledDir(),
D.PrefixDirs);
addExternCSystemInclude(DriverArgs, CC1Args, TargetDir + "/hexagon/include");
}
void HexagonToolChain::addLibCxxIncludePaths(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const {
const Driver &D = getDriver();
if (!D.SysRoot.empty() && getTriple().isMusl())
addLibStdCXXIncludePaths(D.SysRoot + "/usr/include/c++/v1", "", "", "", "",
"", DriverArgs, CC1Args);
else if (getTriple().isMusl())
addLibStdCXXIncludePaths("/usr/include/c++/v1", "", "", "", "", "",
DriverArgs, CC1Args);
else {
std::string TargetDir = getHexagonTargetDir(D.InstalledDir, D.PrefixDirs);
addLibStdCXXIncludePaths(TargetDir, "/hexagon/include/c++/v1", "", "", "",
"", DriverArgs, CC1Args);
}
}
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) {
if (getTriple().isMusl())
return ToolChain::CST_Libcxx;
else
return ToolChain::CST_Libstdcxx;
}
StringRef Value = A->getValue();
if (Value != "libstdc++" && Value != "libc++")
getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args);
if (Value == "libstdc++")
return ToolChain::CST_Libstdcxx;
else if (Value == "libc++")
return ToolChain::CST_Libcxx;
else
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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