llvm-project/llvm/lib/Support/TargetRegistry.cpp

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//===--- TargetRegistry.cpp - Target registration -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/TargetRegistry.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <vector>
using namespace llvm;
// Clients are responsible for avoid race conditions in registration.
static Target *FirstTarget = nullptr;
iterator_range<TargetRegistry::iterator> TargetRegistry::targets() {
return make_range(iterator(FirstTarget), iterator());
}
const Target *TargetRegistry::lookupTarget(const std::string &ArchName,
Triple &TheTriple,
std::string &Error) {
// Allocate target machine. First, check whether the user has explicitly
// specified an architecture to compile for. If so we have to look it up by
// name, because it might be a backend that has no mapping to a target triple.
const Target *TheTarget = nullptr;
if (!ArchName.empty()) {
auto I = find_if(targets(),
[&](const Target &T) { return ArchName == T.getName(); });
if (I == targets().end()) {
Error = "error: invalid target '" + ArchName + "'.\n";
return nullptr;
}
TheTarget = &*I;
// Adjust the triple to match (if known), otherwise stick with the
// given triple.
Triple::ArchType Type = Triple::getArchTypeForLLVMName(ArchName);
if (Type != Triple::UnknownArch)
TheTriple.setArch(Type);
} else {
// Get the target specific parser.
std::string TempError;
TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), TempError);
if (!TheTarget) {
Error = ": error: unable to get target for '"
+ TheTriple.getTriple()
+ "', see --version and --triple.\n";
return nullptr;
}
}
return TheTarget;
}
const Target *TargetRegistry::lookupTarget(const std::string &TT,
std::string &Error) {
// Provide special warning when no targets are initialized.
if (targets().begin() == targets().end()) {
Error = "Unable to find target for this triple (no targets are registered)";
return nullptr;
}
Triple::ArchType Arch = Triple(TT).getArch();
auto ArchMatch = [&](const Target &T) { return T.ArchMatchFn(Arch); };
auto I = find_if(targets(), ArchMatch);
if (I == targets().end()) {
Error = "No available targets are compatible with this triple.";
return nullptr;
}
auto J = std::find_if(std::next(I), targets().end(), ArchMatch);
if (J != targets().end()) {
Error = std::string("Cannot choose between targets \"") + I->Name +
"\" and \"" + J->Name + "\"";
return nullptr;
}
return &*I;
}
void TargetRegistry::RegisterTarget(Target &T,
const char *Name,
const char *ShortDesc,
Target::ArchMatchFnTy ArchMatchFn,
bool HasJIT) {
assert(Name && ShortDesc && ArchMatchFn &&
"Missing required target information!");
Reapply TargetRegistry refactoring commits. --- Reverse-merging r75799 into '.': U test/Analysis/PointerTracking U include/llvm/Target/TargetMachineRegistry.h U include/llvm/Target/TargetMachine.h U include/llvm/Target/TargetRegistry.h U include/llvm/Target/TargetSelect.h U tools/lto/LTOCodeGenerator.cpp U tools/lto/LTOModule.cpp U tools/llc/llc.cpp U lib/Target/PowerPC/PPCTargetMachine.h U lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp U lib/Target/PowerPC/PPCTargetMachine.cpp U lib/Target/PowerPC/PPC.h U lib/Target/ARM/ARMTargetMachine.cpp U lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp U lib/Target/ARM/ARMTargetMachine.h U lib/Target/ARM/ARM.h U lib/Target/XCore/XCoreTargetMachine.cpp U lib/Target/XCore/XCoreTargetMachine.h U lib/Target/PIC16/PIC16TargetMachine.cpp U lib/Target/PIC16/PIC16TargetMachine.h U lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp U lib/Target/Alpha/AlphaTargetMachine.cpp U lib/Target/Alpha/AlphaTargetMachine.h U lib/Target/X86/X86TargetMachine.h U lib/Target/X86/X86.h U lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.h U lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp U lib/Target/X86/AsmPrinter/X86IntelAsmPrinter.h U lib/Target/X86/X86TargetMachine.cpp U lib/Target/MSP430/MSP430TargetMachine.cpp U lib/Target/MSP430/MSP430TargetMachine.h U lib/Target/CppBackend/CPPTargetMachine.h U lib/Target/CppBackend/CPPBackend.cpp U lib/Target/CBackend/CTargetMachine.h U lib/Target/CBackend/CBackend.cpp U lib/Target/TargetMachine.cpp U lib/Target/IA64/IA64TargetMachine.cpp U lib/Target/IA64/AsmPrinter/IA64AsmPrinter.cpp U lib/Target/IA64/IA64TargetMachine.h U lib/Target/IA64/IA64.h U lib/Target/MSIL/MSILWriter.cpp U lib/Target/CellSPU/SPUTargetMachine.h U lib/Target/CellSPU/SPU.h U lib/Target/CellSPU/AsmPrinter/SPUAsmPrinter.cpp U lib/Target/CellSPU/SPUTargetMachine.cpp U lib/Target/Mips/AsmPrinter/MipsAsmPrinter.cpp U lib/Target/Mips/MipsTargetMachine.cpp U lib/Target/Mips/MipsTargetMachine.h U lib/Target/Mips/Mips.h U lib/Target/Sparc/AsmPrinter/SparcAsmPrinter.cpp U lib/Target/Sparc/SparcTargetMachine.cpp U lib/Target/Sparc/SparcTargetMachine.h U lib/ExecutionEngine/JIT/TargetSelect.cpp U lib/Support/TargetRegistry.cpp llvm-svn: 75820
2009-07-16 04:24:03 +08:00
// Check if this target has already been initialized, we allow this as a
// convenience to some clients.
if (T.Name)
return;
// Add to the list of targets.
T.Next = FirstTarget;
2009-07-15 15:37:49 +08:00
FirstTarget = &T;
T.Name = Name;
T.ShortDesc = ShortDesc;
T.ArchMatchFn = ArchMatchFn;
T.HasJIT = HasJIT;
}
static int TargetArraySortFn(const std::pair<StringRef, const Target *> *LHS,
const std::pair<StringRef, const Target *> *RHS) {
return LHS->first.compare(RHS->first);
}
void TargetRegistry::printRegisteredTargetsForVersion() {
std::vector<std::pair<StringRef, const Target*> > Targets;
size_t Width = 0;
for (const auto &T : TargetRegistry::targets()) {
Targets.push_back(std::make_pair(T.getName(), &T));
Width = std::max(Width, Targets.back().first.size());
}
array_pod_sort(Targets.begin(), Targets.end(), TargetArraySortFn);
raw_ostream &OS = outs();
OS << " Registered Targets:\n";
for (unsigned i = 0, e = Targets.size(); i != e; ++i) {
OS << " " << Targets[i].first;
OS.indent(Width - Targets[i].first.size()) << " - "
<< Targets[i].second->getShortDescription() << '\n';
}
if (Targets.empty())
OS << " (none)\n";
}