forked from OSchip/llvm-project
432 lines
14 KiB
C++
432 lines
14 KiB
C++
//===--- ToolChain.cpp - Collections of tools for one platform ------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "Tools.h"
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#include "clang/Basic/ObjCRuntime.h"
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#include "clang/Driver/Action.h"
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#include "clang/Driver/Driver.h"
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#include "clang/Driver/DriverDiagnostic.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/SanitizerArgs.h"
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#include "clang/Driver/ToolChain.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/Option/Arg.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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using namespace clang::driver;
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using namespace clang;
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using namespace llvm::opt;
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ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
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const ArgList &A)
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: D(D), Triple(T), Args(A) {
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}
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ToolChain::~ToolChain() {
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}
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const Driver &ToolChain::getDriver() const {
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return D;
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}
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bool ToolChain::useIntegratedAs() const {
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return Args.hasFlag(options::OPT_fintegrated_as,
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options::OPT_fno_integrated_as,
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IsIntegratedAssemblerDefault());
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}
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const SanitizerArgs& ToolChain::getSanitizerArgs() const {
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if (!SanitizerArguments.get())
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SanitizerArguments.reset(new SanitizerArgs(*this, Args));
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return *SanitizerArguments.get();
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}
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StringRef ToolChain::getDefaultUniversalArchName() const {
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// In universal driver terms, the arch name accepted by -arch isn't exactly
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// the same as the ones that appear in the triple. Roughly speaking, this is
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// an inverse of the darwin::getArchTypeForDarwinArchName() function, but the
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// only interesting special case is powerpc.
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switch (Triple.getArch()) {
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case llvm::Triple::ppc:
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return "ppc";
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case llvm::Triple::ppc64:
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return "ppc64";
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case llvm::Triple::ppc64le:
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return "ppc64le";
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default:
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return Triple.getArchName();
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}
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}
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bool ToolChain::IsUnwindTablesDefault() const {
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return false;
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}
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Tool *ToolChain::getClang() const {
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if (!Clang)
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Clang.reset(new tools::Clang(*this));
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return Clang.get();
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}
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Tool *ToolChain::buildAssembler() const {
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return new tools::ClangAs(*this);
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}
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Tool *ToolChain::buildLinker() const {
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llvm_unreachable("Linking is not supported by this toolchain");
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}
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Tool *ToolChain::getAssemble() const {
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if (!Assemble)
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Assemble.reset(buildAssembler());
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return Assemble.get();
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}
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Tool *ToolChain::getClangAs() const {
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if (!Assemble)
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Assemble.reset(new tools::ClangAs(*this));
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return Assemble.get();
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}
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Tool *ToolChain::getLink() const {
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if (!Link)
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Link.reset(buildLinker());
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return Link.get();
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}
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Tool *ToolChain::getTool(Action::ActionClass AC) const {
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switch (AC) {
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case Action::AssembleJobClass:
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return getAssemble();
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case Action::LinkJobClass:
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return getLink();
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case Action::InputClass:
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case Action::BindArchClass:
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case Action::LipoJobClass:
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case Action::DsymutilJobClass:
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case Action::VerifyDebugInfoJobClass:
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llvm_unreachable("Invalid tool kind.");
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case Action::CompileJobClass:
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case Action::PrecompileJobClass:
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case Action::PreprocessJobClass:
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case Action::AnalyzeJobClass:
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case Action::MigrateJobClass:
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case Action::VerifyPCHJobClass:
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return getClang();
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}
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llvm_unreachable("Invalid tool kind.");
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}
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Tool *ToolChain::SelectTool(const JobAction &JA) const {
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if (getDriver().ShouldUseClangCompiler(JA))
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return getClang();
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Action::ActionClass AC = JA.getKind();
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if (AC == Action::AssembleJobClass && useIntegratedAs())
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return getClangAs();
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return getTool(AC);
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}
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std::string ToolChain::GetFilePath(const char *Name) const {
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return D.GetFilePath(Name, *this);
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}
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std::string ToolChain::GetProgramPath(const char *Name) const {
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return D.GetProgramPath(Name, *this);
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}
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std::string ToolChain::GetLinkerPath() const {
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if (Arg *A = Args.getLastArg(options::OPT_fuse_ld_EQ)) {
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StringRef Suffix = A->getValue();
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// If we're passed -fuse-ld= with no argument, or with the argument ld,
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// then use whatever the default system linker is.
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if (Suffix.empty() || Suffix == "ld")
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return GetProgramPath("ld");
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llvm::SmallString<8> LinkerName("ld.");
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LinkerName.append(Suffix);
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std::string LinkerPath(GetProgramPath(LinkerName.c_str()));
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if (llvm::sys::fs::exists(LinkerPath))
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return LinkerPath;
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getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
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return "";
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}
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return GetProgramPath("ld");
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}
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types::ID ToolChain::LookupTypeForExtension(const char *Ext) const {
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return types::lookupTypeForExtension(Ext);
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}
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bool ToolChain::HasNativeLLVMSupport() const {
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return false;
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}
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bool ToolChain::isCrossCompiling() const {
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llvm::Triple HostTriple(LLVM_HOST_TRIPLE);
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switch (HostTriple.getArch()) {
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// The A32/T32/T16 instruction sets are not separate architectures in this
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// context.
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case llvm::Triple::arm:
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case llvm::Triple::armeb:
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case llvm::Triple::thumb:
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case llvm::Triple::thumbeb:
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return getArch() != llvm::Triple::arm && getArch() != llvm::Triple::thumb &&
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getArch() != llvm::Triple::armeb && getArch() != llvm::Triple::thumbeb;
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default:
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return HostTriple.getArch() != getArch();
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}
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}
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ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
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return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
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VersionTuple());
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}
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std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
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types::ID InputType) const {
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switch (getTriple().getArch()) {
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default:
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return getTripleString();
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case llvm::Triple::x86_64: {
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llvm::Triple Triple = getTriple();
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if (!Triple.isOSBinFormatMachO())
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return getTripleString();
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if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
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// x86_64h goes in the triple. Other -march options just use the
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// vanilla triple we already have.
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StringRef MArch = A->getValue();
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if (MArch == "x86_64h")
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Triple.setArchName(MArch);
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}
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return Triple.getTriple();
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}
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case llvm::Triple::aarch64: {
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llvm::Triple Triple = getTriple();
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if (!Triple.isOSBinFormatMachO())
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return getTripleString();
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// FIXME: older versions of ld64 expect the "arm64" component in the actual
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// triple string and query it to determine whether an LTO file can be
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// handled. Remove this when we don't care any more.
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Triple.setArchName("arm64");
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return Triple.getTriple();
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}
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case llvm::Triple::arm:
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case llvm::Triple::armeb:
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case llvm::Triple::thumb:
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case llvm::Triple::thumbeb: {
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// FIXME: Factor into subclasses.
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llvm::Triple Triple = getTriple();
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bool IsBigEndian = getTriple().getArch() == llvm::Triple::armeb ||
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getTriple().getArch() == llvm::Triple::thumbeb;
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// Handle pseudo-target flags '-mlittle-endian'/'-EL' and
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// '-mbig-endian'/'-EB'.
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if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
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options::OPT_mbig_endian)) {
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if (A->getOption().matches(options::OPT_mlittle_endian))
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IsBigEndian = false;
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else
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IsBigEndian = true;
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}
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// Thumb2 is the default for V7 on Darwin.
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//
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// FIXME: Thumb should just be another -target-feaure, not in the triple.
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StringRef Suffix = Triple.isOSBinFormatMachO()
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? tools::arm::getLLVMArchSuffixForARM(tools::arm::getARMCPUForMArch(Args, Triple))
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: tools::arm::getLLVMArchSuffixForARM(tools::arm::getARMTargetCPU(Args, Triple));
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bool ThumbDefault = Suffix.startswith("v6m") || Suffix.startswith("v7m") ||
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Suffix.startswith("v7em") ||
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(Suffix.startswith("v7") && getTriple().isOSBinFormatMachO());
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// FIXME: this is invalid for WindowsCE
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if (getTriple().isOSWindows())
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ThumbDefault = true;
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std::string ArchName;
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if (IsBigEndian)
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ArchName = "armeb";
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else
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ArchName = "arm";
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// Assembly files should start in ARM mode.
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if (InputType != types::TY_PP_Asm &&
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Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault))
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{
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if (IsBigEndian)
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ArchName = "thumbeb";
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else
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ArchName = "thumb";
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}
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Triple.setArchName(ArchName + Suffix.str());
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return Triple.getTriple();
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}
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}
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}
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std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
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types::ID InputType) const {
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return ComputeLLVMTriple(Args, InputType);
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}
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void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
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ArgStringList &CC1Args) const {
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// Each toolchain should provide the appropriate include flags.
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}
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void ToolChain::addClangTargetOptions(const ArgList &DriverArgs,
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ArgStringList &CC1Args) const {
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}
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void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {}
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ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
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const ArgList &Args) const
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{
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if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) {
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StringRef Value = A->getValue();
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if (Value == "compiler-rt")
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return ToolChain::RLT_CompilerRT;
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if (Value == "libgcc")
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return ToolChain::RLT_Libgcc;
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getDriver().Diag(diag::err_drv_invalid_rtlib_name)
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<< A->getAsString(Args);
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}
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return GetDefaultRuntimeLibType();
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}
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ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
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if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
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StringRef Value = A->getValue();
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if (Value == "libc++")
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return ToolChain::CST_Libcxx;
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if (Value == "libstdc++")
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return ToolChain::CST_Libstdcxx;
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getDriver().Diag(diag::err_drv_invalid_stdlib_name)
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<< A->getAsString(Args);
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}
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return ToolChain::CST_Libstdcxx;
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}
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/// \brief Utility function to add a system include directory to CC1 arguments.
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/*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
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ArgStringList &CC1Args,
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const Twine &Path) {
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CC1Args.push_back("-internal-isystem");
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CC1Args.push_back(DriverArgs.MakeArgString(Path));
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}
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/// \brief Utility function to add a system include directory with extern "C"
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/// semantics to CC1 arguments.
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///
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/// Note that this should be used rarely, and only for directories that
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/// historically and for legacy reasons are treated as having implicit extern
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/// "C" semantics. These semantics are *ignored* by and large today, but its
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/// important to preserve the preprocessor changes resulting from the
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/// classification.
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/*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
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ArgStringList &CC1Args,
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const Twine &Path) {
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CC1Args.push_back("-internal-externc-isystem");
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CC1Args.push_back(DriverArgs.MakeArgString(Path));
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}
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void ToolChain::addExternCSystemIncludeIfExists(const ArgList &DriverArgs,
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ArgStringList &CC1Args,
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const Twine &Path) {
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if (llvm::sys::fs::exists(Path))
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addExternCSystemInclude(DriverArgs, CC1Args, Path);
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}
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/// \brief Utility function to add a list of system include directories to CC1.
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/*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
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ArgStringList &CC1Args,
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ArrayRef<StringRef> Paths) {
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for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end();
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I != E; ++I) {
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CC1Args.push_back("-internal-isystem");
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CC1Args.push_back(DriverArgs.MakeArgString(*I));
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}
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}
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void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
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ArgStringList &CC1Args) const {
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// Header search paths should be handled by each of the subclasses.
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// Historically, they have not been, and instead have been handled inside of
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// the CC1-layer frontend. As the logic is hoisted out, this generic function
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// will slowly stop being called.
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//
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// While it is being called, replicate a bit of a hack to propagate the
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// '-stdlib=' flag down to CC1 so that it can in turn customize the C++
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// header search paths with it. Once all systems are overriding this
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// function, the CC1 flag and this line can be removed.
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DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
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}
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void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
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ArgStringList &CmdArgs) const {
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CXXStdlibType Type = GetCXXStdlibType(Args);
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switch (Type) {
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case ToolChain::CST_Libcxx:
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CmdArgs.push_back("-lc++");
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break;
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case ToolChain::CST_Libstdcxx:
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CmdArgs.push_back("-lstdc++");
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break;
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}
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}
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void ToolChain::AddCCKextLibArgs(const ArgList &Args,
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ArgStringList &CmdArgs) const {
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CmdArgs.push_back("-lcc_kext");
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}
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bool ToolChain::AddFastMathRuntimeIfAvailable(const ArgList &Args,
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ArgStringList &CmdArgs) const {
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// Do not check for -fno-fast-math or -fno-unsafe-math when -Ofast passed
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// (to keep the linker options consistent with gcc and clang itself).
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if (!isOptimizationLevelFast(Args)) {
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// Check if -ffast-math or -funsafe-math.
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Arg *A =
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Args.getLastArg(options::OPT_ffast_math, options::OPT_fno_fast_math,
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options::OPT_funsafe_math_optimizations,
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options::OPT_fno_unsafe_math_optimizations);
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if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
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A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
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return false;
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}
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// If crtfastmath.o exists add it to the arguments.
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std::string Path = GetFilePath("crtfastmath.o");
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if (Path == "crtfastmath.o") // Not found.
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return false;
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CmdArgs.push_back(Args.MakeArgString(Path));
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return true;
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}
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