2009-07-15 12:24:58 +08:00
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//===--- TargetRegistry.cpp - Target registration -------------------------===//
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//
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2019-01-19 16:50:56 +08:00
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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2009-07-15 12:24:58 +08:00
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//
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//===----------------------------------------------------------------------===//
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2011-08-25 02:08:43 +08:00
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#include "llvm/Support/TargetRegistry.h"
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2011-07-22 15:50:44 +08:00
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/raw_ostream.h"
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2009-07-15 12:24:58 +08:00
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#include <cassert>
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2011-07-22 15:50:44 +08:00
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#include <vector>
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2009-07-15 12:24:58 +08:00
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using namespace llvm;
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2009-07-15 15:09:29 +08:00
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// Clients are responsible for avoid race conditions in registration.
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2014-04-07 12:17:22 +08:00
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static Target *FirstTarget = nullptr;
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2009-07-15 12:24:58 +08:00
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2015-05-12 06:20:48 +08:00
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iterator_range<TargetRegistry::iterator> TargetRegistry::targets() {
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return make_range(iterator(FirstTarget), iterator());
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2009-07-16 10:06:09 +08:00
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}
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2012-05-09 07:38:45 +08:00
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const Target *TargetRegistry::lookupTarget(const std::string &ArchName,
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Triple &TheTriple,
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std::string &Error) {
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// Allocate target machine. First, check whether the user has explicitly
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// specified an architecture to compile for. If so we have to look it up by
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// name, because it might be a backend that has no mapping to a target triple.
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2014-04-07 12:17:22 +08:00
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const Target *TheTarget = nullptr;
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2012-05-09 07:38:45 +08:00
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if (!ArchName.empty()) {
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2016-08-12 08:18:03 +08:00
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auto I = find_if(targets(),
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2015-05-12 06:20:48 +08:00
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[&](const Target &T) { return ArchName == T.getName(); });
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2012-05-09 07:38:45 +08:00
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2015-05-12 06:20:48 +08:00
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if (I == targets().end()) {
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2012-05-09 07:38:45 +08:00
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Error = "error: invalid target '" + ArchName + "'.\n";
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2014-04-07 12:17:22 +08:00
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return nullptr;
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2012-05-09 07:38:45 +08:00
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}
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2015-05-12 06:20:48 +08:00
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TheTarget = &*I;
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2012-05-09 07:38:45 +08:00
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// Adjust the triple to match (if known), otherwise stick with the
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// given triple.
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Triple::ArchType Type = Triple::getArchTypeForLLVMName(ArchName);
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if (Type != Triple::UnknownArch)
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TheTriple.setArch(Type);
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} else {
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// Get the target specific parser.
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std::string TempError;
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TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), TempError);
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2014-04-09 12:20:00 +08:00
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if (!TheTarget) {
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2012-05-09 07:38:45 +08:00
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Error = ": error: unable to get target for '"
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+ TheTriple.getTriple()
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+ "', see --version and --triple.\n";
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2014-04-07 12:17:22 +08:00
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return nullptr;
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2012-05-09 07:38:45 +08:00
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}
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}
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return TheTarget;
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}
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2009-07-26 10:12:58 +08:00
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const Target *TargetRegistry::lookupTarget(const std::string &TT,
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std::string &Error) {
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2009-07-17 23:50:49 +08:00
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// Provide special warning when no targets are initialized.
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2015-05-12 06:20:48 +08:00
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if (targets().begin() == targets().end()) {
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2009-07-17 23:50:49 +08:00
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Error = "Unable to find target for this triple (no targets are registered)";
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2014-04-07 12:17:22 +08:00
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return nullptr;
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2009-07-17 23:50:49 +08:00
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}
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2015-05-12 06:20:48 +08:00
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Triple::ArchType Arch = Triple(TT).getArch();
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auto ArchMatch = [&](const Target &T) { return T.ArchMatchFn(Arch); };
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2016-08-12 08:18:03 +08:00
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auto I = find_if(targets(), ArchMatch);
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2009-07-15 12:24:58 +08:00
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2015-05-12 06:20:48 +08:00
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if (I == targets().end()) {
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2018-08-23 11:40:31 +08:00
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Error = "No available targets are compatible with triple \"" + TT + "\"";
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2014-04-07 12:17:22 +08:00
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return nullptr;
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2009-07-15 12:24:58 +08:00
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}
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2015-05-12 06:20:48 +08:00
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auto J = std::find_if(std::next(I), targets().end(), ArchMatch);
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if (J != targets().end()) {
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2016-10-01 15:08:23 +08:00
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Error = std::string("Cannot choose between targets \"") + I->Name +
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"\" and \"" + J->Name + "\"";
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2015-05-12 06:20:48 +08:00
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return nullptr;
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}
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return &*I;
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2009-07-15 12:24:58 +08:00
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}
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Add backend name to Target to enable runtime info to be fed back into TableGen
Summary:
Make it possible to feed runtime information back to tablegen to enable
profile-guided tablegen-eration, detection of untested tablegen definitions, etc.
Being a cross-compiler by nature, LLVM will potentially collect data for multiple
architectures (e.g. when running 'ninja check'). We therefore need a way for
TableGen to figure out what data applies to the backend it is generating at the
time. This patch achieves that by including the name of the 'def X : Target ...'
for the backend in the TargetRegistry.
Reviewers: qcolombet
Reviewed By: qcolombet
Subscribers: jholewinski, arsenm, jyknight, aditya_nandakumar, sdardis, nemanjai, ab, nhaehnle, t.p.northover, javed.absar, qcolombet, llvm-commits, fedor.sergeev
Differential Revision: https://reviews.llvm.org/D39742
llvm-svn: 318352
2017-11-16 07:55:44 +08:00
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void TargetRegistry::RegisterTarget(Target &T, const char *Name,
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2016-10-01 15:08:23 +08:00
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const char *ShortDesc,
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Add backend name to Target to enable runtime info to be fed back into TableGen
Summary:
Make it possible to feed runtime information back to tablegen to enable
profile-guided tablegen-eration, detection of untested tablegen definitions, etc.
Being a cross-compiler by nature, LLVM will potentially collect data for multiple
architectures (e.g. when running 'ninja check'). We therefore need a way for
TableGen to figure out what data applies to the backend it is generating at the
time. This patch achieves that by including the name of the 'def X : Target ...'
for the backend in the TargetRegistry.
Reviewers: qcolombet
Reviewed By: qcolombet
Subscribers: jholewinski, arsenm, jyknight, aditya_nandakumar, sdardis, nemanjai, ab, nhaehnle, t.p.northover, javed.absar, qcolombet, llvm-commits, fedor.sergeev
Differential Revision: https://reviews.llvm.org/D39742
llvm-svn: 318352
2017-11-16 07:55:44 +08:00
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const char *BackendName,
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2013-12-14 00:05:32 +08:00
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Target::ArchMatchFnTy ArchMatchFn,
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2009-07-25 18:09:50 +08:00
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bool HasJIT) {
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2016-10-01 15:08:23 +08:00
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assert(Name && ShortDesc && ArchMatchFn &&
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2009-07-15 12:24:58 +08:00
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"Missing required target information!");
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2009-07-16 04:24:03 +08:00
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// Check if this target has already been initialized, we allow this as a
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// convenience to some clients.
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2016-10-01 15:08:23 +08:00
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if (T.Name)
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2009-07-16 04:24:03 +08:00
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return;
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2018-07-31 03:41:25 +08:00
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2009-07-15 12:24:58 +08:00
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// Add to the list of targets.
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T.Next = FirstTarget;
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2009-07-15 15:37:49 +08:00
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FirstTarget = &T;
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2009-07-15 12:24:58 +08:00
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T.Name = Name;
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T.ShortDesc = ShortDesc;
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Add backend name to Target to enable runtime info to be fed back into TableGen
Summary:
Make it possible to feed runtime information back to tablegen to enable
profile-guided tablegen-eration, detection of untested tablegen definitions, etc.
Being a cross-compiler by nature, LLVM will potentially collect data for multiple
architectures (e.g. when running 'ninja check'). We therefore need a way for
TableGen to figure out what data applies to the backend it is generating at the
time. This patch achieves that by including the name of the 'def X : Target ...'
for the backend in the TargetRegistry.
Reviewers: qcolombet
Reviewed By: qcolombet
Subscribers: jholewinski, arsenm, jyknight, aditya_nandakumar, sdardis, nemanjai, ab, nhaehnle, t.p.northover, javed.absar, qcolombet, llvm-commits, fedor.sergeev
Differential Revision: https://reviews.llvm.org/D39742
llvm-svn: 318352
2017-11-16 07:55:44 +08:00
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T.BackendName = BackendName;
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2013-12-14 00:05:32 +08:00
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T.ArchMatchFn = ArchMatchFn;
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2009-07-25 18:09:50 +08:00
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T.HasJIT = HasJIT;
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2009-07-15 12:24:58 +08:00
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}
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2014-03-08 05:52:38 +08:00
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static int TargetArraySortFn(const std::pair<StringRef, const Target *> *LHS,
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const std::pair<StringRef, const Target *> *RHS) {
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return LHS->first.compare(RHS->first);
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}
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2017-06-07 05:54:04 +08:00
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void TargetRegistry::printRegisteredTargetsForVersion(raw_ostream &OS) {
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2011-07-22 15:50:44 +08:00
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std::vector<std::pair<StringRef, const Target*> > Targets;
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size_t Width = 0;
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2015-05-12 06:20:48 +08:00
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for (const auto &T : TargetRegistry::targets()) {
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Targets.push_back(std::make_pair(T.getName(), &T));
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2011-07-22 15:50:44 +08:00
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Width = std::max(Width, Targets.back().first.size());
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}
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2014-03-08 05:52:38 +08:00
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array_pod_sort(Targets.begin(), Targets.end(), TargetArraySortFn);
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2011-07-22 15:50:44 +08:00
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OS << " Registered Targets:\n";
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for (unsigned i = 0, e = Targets.size(); i != e; ++i) {
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OS << " " << Targets[i].first;
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OS.indent(Width - Targets[i].first.size()) << " - "
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<< Targets[i].second->getShortDescription() << '\n';
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}
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if (Targets.empty())
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OS << " (none)\n";
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}
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