1 files changed, 74 insertions, 1 deletions
diff --git a/contrib/llvm-project/clang/lib/Basic/Attributes.cpp b/contrib/llvm-project/clang/lib/Basic/Attributes.cpp
index 9a8eb3d932cc..74cc3d1d03da 100644
--- a/contrib/llvm-project/clang/lib/Basic/Attributes.cpp
+++ b/contrib/llvm-project/clang/lib/Basic/Attributes.cpp
@@ -1,5 +1,6 @@
 #include "clang/Basic/Attributes.h"
 #include "clang/Basic/AttrSubjectMatchRules.h"
+#include "clang/Basic/AttributeCommonInfo.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "llvm/ADT/StringSwitch.h"
 using namespace clang;
@@ -21,7 +22,7 @@ int clang::hasAttribute(AttrSyntax Syntax, const IdentifierInfo *Scope,
 
 #include "clang/Basic/AttrHasAttributeImpl.inc"
 
-  return 0;
+  return 0;
 }
 
 const char *attr::getSubjectMatchRuleSpelling(attr::SubjectMatchRule Rule) {
@@ -33,3 +34,75 @@ const char *attr::getSubjectMatchRuleSpelling(attr::SubjectMatchRule Rule) {
   }
   llvm_unreachable("Invalid subject match rule");
 }
+
+static StringRef
+normalizeAttrScopeName(StringRef ScopeName,
+                       AttributeCommonInfo::Syntax SyntaxUsed) {
+  // Normalize the "__gnu__" scope name to be "gnu" and the "_Clang" scope name
+  // to be "clang".
+  if (SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
+      SyntaxUsed == AttributeCommonInfo::AS_C2x) {
+    if (ScopeName == "__gnu__")
+      ScopeName = "gnu";
+    else if (ScopeName == "_Clang")
+      ScopeName = "clang";
+  }
+  return ScopeName;
+}
+
+static StringRef normalizeAttrName(StringRef AttrName,
+                                   StringRef NormalizedScopeName,
+                                   AttributeCommonInfo::Syntax SyntaxUsed) {
+  // Normalize the attribute name, __foo__ becomes foo. This is only allowable
+  // for GNU attributes, and attributes using the double square bracket syntax.
+  bool ShouldNormalize =
+      SyntaxUsed == AttributeCommonInfo::AS_GNU ||
+      ((SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
+        SyntaxUsed == AttributeCommonInfo::AS_C2x) &&
+       (NormalizedScopeName.empty() || NormalizedScopeName == "gnu" ||
+        NormalizedScopeName == "clang"));
+  if (ShouldNormalize && AttrName.size() >= 4 && AttrName.startswith("__") &&
+      AttrName.endswith("__"))
+    AttrName = AttrName.slice(2, AttrName.size() - 2);
+
+  return AttrName;
+}
+
+bool AttributeCommonInfo::isGNUScope() const {
+  return ScopeName && (ScopeName->isStr("gnu") || ScopeName->isStr("__gnu__"));
+}
+
+#include "clang/Sema/AttrParsedAttrKinds.inc"
+
+AttributeCommonInfo::Kind
+AttributeCommonInfo::getParsedKind(const IdentifierInfo *Name,
+                                   const IdentifierInfo *ScopeName,
+                                   Syntax SyntaxUsed) {
+  StringRef AttrName = Name->getName();
+
+  SmallString<64> FullName;
+  if (ScopeName)
+    FullName += normalizeAttrScopeName(ScopeName->getName(), SyntaxUsed);
+
+  AttrName = normalizeAttrName(AttrName, FullName, SyntaxUsed);
+
+  // Ensure that in the case of C++11 attributes, we look for '::foo' if it is
+  // unscoped.
+  if (ScopeName || SyntaxUsed == AS_CXX11 || SyntaxUsed == AS_C2x)
+    FullName += "::";
+  FullName += AttrName;
+
+  return ::getAttrKind(FullName, SyntaxUsed);
+}
+
+unsigned AttributeCommonInfo::calculateAttributeSpellingListIndex() const {
+  // Both variables will be used in tablegen generated
+  // attribute spell list index matching code.
+  auto Syntax = static_cast<AttributeCommonInfo::Syntax>(getSyntax());
+  StringRef Scope =
+      getScopeName() ? normalizeAttrScopeName(getScopeName()->getName(), Syntax)
+                     : "";
+  StringRef Name = normalizeAttrName(getAttrName()->getName(), Scope, Syntax);
+
+#include "clang/Sema/AttrSpellingListIndex.inc"
+}