1 files changed, 82 insertions, 0 deletions

diff --git a/contrib/llvm-project/llvm/lib/MC/SubtargetFeature.cpp b/contrib/llvm-project/llvm/lib/MC/SubtargetFeature.cpp
new file mode 100644
index 000000000000..c4dd77359b24
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/MC/SubtargetFeature.cpp
@@ -0,0 +1,82 @@
+//===- SubtargetFeature.cpp - CPU characteristics Implementation ----------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file Implements the SubtargetFeature interface.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Config/llvm-config.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <cstring>
+#include <iterator>
+#include <string>
+#include <vector>
+
+using namespace llvm;
+
+/// Splits a string of comma separated items in to a vector of strings.
+void SubtargetFeatures::Split(std::vector<std::string> &V, StringRef S) {
+  SmallVector<StringRef, 3> Tmp;
+  S.split(Tmp, ',', -1, false /* KeepEmpty */);
+  V.assign(Tmp.begin(), Tmp.end());
+}
+
+void SubtargetFeatures::AddFeature(StringRef String, bool Enable) {
+  // Don't add empty features.
+  if (!String.empty())
+    // Convert to lowercase, prepend flag if we don't already have a flag.
+    Features.push_back(hasFlag(String) ? String.lower()
+                                       : (Enable ? "+" : "-") + String.lower());
+}
+
+SubtargetFeatures::SubtargetFeatures(StringRef Initial) {
+  // Break up string into separate features
+  Split(Features, Initial);
+}
+
+std::string SubtargetFeatures::getString() const {
+  return join(Features.begin(), Features.end(), ",");
+}
+
+void SubtargetFeatures::print(raw_ostream &OS) const {
+  for (auto &F : Features)
+    OS << F << " ";
+  OS << "\n";
+}
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_DUMP_METHOD void SubtargetFeatures::dump() const {
+  print(dbgs());
+}
+#endif
+
+void SubtargetFeatures::getDefaultSubtargetFeatures(const Triple& Triple) {
+  // FIXME: This is an inelegant way of specifying the features of a
+  // subtarget. It would be better if we could encode this information
+  // into the IR. See <rdar://5972456>.
+  if (Triple.getVendor() == Triple::Apple) {
+    if (Triple.getArch() == Triple::ppc) {
+      // powerpc-apple-*
+      AddFeature("altivec");
+    } else if (Triple.getArch() == Triple::ppc64) {
+      // powerpc64-apple-*
+      AddFeature("64bit");
+      AddFeature("altivec");
+    }
+  }
+}