using namespace llvm;
// Clients are responsible for avoid race conditions in registration.
-static Target *FirstTarget = 0;
+static Target *FirstTarget = nullptr;
TargetRegistry::iterator TargetRegistry::begin() {
return iterator(FirstTarget);
}
+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()) {
+ for (TargetRegistry::iterator it = TargetRegistry::begin(),
+ ie = TargetRegistry::end(); it != ie; ++it) {
+ if (ArchName == it->getName()) {
+ TheTarget = &*it;
+ break;
+ }
+ }
+
+ if (!TheTarget) {
+ Error = "error: invalid target '" + ArchName + "'.\n";
+ return nullptr;
+ }
+
+ // 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 (begin() == end()) {
Error = "Unable to find target for this triple (no targets are registered)";
- return 0;
+ return nullptr;
}
- const Target *Best = 0, *EquallyBest = 0;
- unsigned BestQuality = 0;
+ const Target *Matching = nullptr;
+ Triple::ArchType Arch = Triple(TT).getArch();
for (iterator it = begin(), ie = end(); it != ie; ++it) {
- if (unsigned Qual = it->TripleMatchQualityFn(TT)) {
- if (!Best || Qual > BestQuality) {
- Best = &*it;
- EquallyBest = 0;
- BestQuality = Qual;
- } else if (Qual == BestQuality)
- EquallyBest = &*it;
+ if (it->ArchMatchFn(Arch)) {
+ if (Matching) {
+ Error = std::string("Cannot choose between targets \"") +
+ Matching->Name + "\" and \"" + it->Name + "\"";
+ return nullptr;
+ }
+ Matching = &*it;
}
}
- if (!Best) {
+ if (!Matching) {
Error = "No available targets are compatible with this triple, "
"see -version for the available targets.";
- return 0;
- }
-
- // Otherwise, take the best target, but make sure we don't have two equally
- // good best targets.
- if (EquallyBest) {
- Error = std::string("Cannot choose between targets \"") +
- Best->Name + "\" and \"" + EquallyBest->Name + "\"";
- return 0;
+ return nullptr;
}
- return Best;
+ return Matching;
}
void TargetRegistry::RegisterTarget(Target &T,
const char *Name,
const char *ShortDesc,
- Target::TripleMatchQualityFnTy TQualityFn,
+ Target::ArchMatchFnTy ArchMatchFn,
bool HasJIT) {
- assert(Name && ShortDesc && TQualityFn &&
+ assert(Name && ShortDesc && ArchMatchFn &&
"Missing required target information!");
// Check if this target has already been initialized, we allow this as a
T.Name = Name;
T.ShortDesc = ShortDesc;
- T.TripleMatchQualityFn = TQualityFn;
+ T.ArchMatchFn = ArchMatchFn;
T.HasJIT = HasJIT;
}
const Target *TargetRegistry::getClosestTargetForJIT(std::string &Error) {
- const Target *TheTarget = lookupTarget(sys::getHostTriple(), Error);
+ const Target *TheTarget = lookupTarget(sys::getDefaultTargetTriple(), Error);
if (TheTarget && !TheTarget->hasJIT()) {
Error = "No JIT compatible target available for this host";
- return 0;
+ return nullptr;
}
return TheTarget;
}
-static int TargetArraySortFn(const void *LHS, const void *RHS) {
- typedef std::pair<StringRef, const Target*> pair_ty;
- return ((const pair_ty*)LHS)->first.compare(((const pair_ty*)RHS)->first);
+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() {