Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 263 insertions, 0 deletions

diff --git a/clang-r353983/include/clang/Basic/Builtins.h b/clang-r353983/include/clang/Basic/Builtins.h
new file mode 100644
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+++ b/clang-r353983/include/clang/Basic/Builtins.h
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+//===--- Builtins.h - Builtin function header -------------------*- C++ -*-===//
+//
+// 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
+/// Defines enum values for all the target-independent builtin
+/// functions.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_BUILTINS_H
+#define LLVM_CLANG_BASIC_BUILTINS_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include <cstring>
+
+// VC++ defines 'alloca' as an object-like macro, which interferes with our
+// builtins.
+#undef alloca
+
+namespace clang {
+class TargetInfo;
+class IdentifierTable;
+class ASTContext;
+class QualType;
+class LangOptions;
+
+enum LanguageID {
+  GNU_LANG = 0x1,     // builtin requires GNU mode.
+  C_LANG = 0x2,       // builtin for c only.
+  CXX_LANG = 0x4,     // builtin for cplusplus only.
+  OBJC_LANG = 0x8,    // builtin for objective-c and objective-c++
+  MS_LANG = 0x10,     // builtin requires MS mode.
+  OCLC20_LANG = 0x20, // builtin for OpenCL C 2.0 only.
+  OCLC1X_LANG = 0x40, // builtin for OpenCL C 1.x only.
+  OMP_LANG = 0x80,    // builtin requires OpenMP.
+  ALL_LANGUAGES = C_LANG | CXX_LANG | OBJC_LANG, // builtin for all languages.
+  ALL_GNU_LANGUAGES = ALL_LANGUAGES | GNU_LANG,  // builtin requires GNU mode.
+  ALL_MS_LANGUAGES = ALL_LANGUAGES | MS_LANG,    // builtin requires MS mode.
+  ALL_OCLC_LANGUAGES = OCLC1X_LANG | OCLC20_LANG // builtin for OCLC languages.
+};
+
+namespace Builtin {
+enum ID {
+  NotBuiltin  = 0,      // This is not a builtin function.
+#define BUILTIN(ID, TYPE, ATTRS) BI##ID,
+#include "clang/Basic/Builtins.def"
+  FirstTSBuiltin
+};
+
+struct Info {
+  const char *Name, *Type, *Attributes, *HeaderName;
+  LanguageID Langs;
+  const char *Features;
+};
+
+/// Holds information about both target-independent and
+/// target-specific builtins, allowing easy queries by clients.
+///
+/// Builtins from an optional auxiliary target are stored in
+/// AuxTSRecords. Their IDs are shifted up by TSRecords.size() and need to
+/// be translated back with getAuxBuiltinID() before use.
+class Context {
+  llvm::ArrayRef<Info> TSRecords;
+  llvm::ArrayRef<Info> AuxTSRecords;
+
+public:
+  Context() {}
+
+  /// Perform target-specific initialization
+  /// \param AuxTarget Target info to incorporate builtins from. May be nullptr.
+  void InitializeTarget(const TargetInfo &Target, const TargetInfo *AuxTarget);
+
+  /// Mark the identifiers for all the builtins with their
+  /// appropriate builtin ID # and mark any non-portable builtin identifiers as
+  /// such.
+  void initializeBuiltins(IdentifierTable &Table, const LangOptions& LangOpts);
+
+  /// Return the identifier name for the specified builtin,
+  /// e.g. "__builtin_abs".
+  const char *getName(unsigned ID) const {
+    return getRecord(ID).Name;
+  }
+
+  /// Get the type descriptor string for the specified builtin.
+  const char *getTypeString(unsigned ID) const {
+    return getRecord(ID).Type;
+  }
+
+  /// Return true if this function is a target-specific builtin.
+  bool isTSBuiltin(unsigned ID) const {
+    return ID >= Builtin::FirstTSBuiltin;
+  }
+
+  /// Return true if this function has no side effects.
+  bool isPure(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'U') != nullptr;
+  }
+
+  /// Return true if this function has no side effects and doesn't
+  /// read memory.
+  bool isConst(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'c') != nullptr;
+  }
+
+  /// Return true if we know this builtin never throws an exception.
+  bool isNoThrow(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'n') != nullptr;
+  }
+
+  /// Return true if we know this builtin never returns.
+  bool isNoReturn(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'r') != nullptr;
+  }
+
+  /// Return true if we know this builtin can return twice.
+  bool isReturnsTwice(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'j') != nullptr;
+  }
+
+  /// Returns true if this builtin does not perform the side-effects
+  /// of its arguments.
+  bool isUnevaluated(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'u') != nullptr;
+  }
+
+  /// Return true if this is a builtin for a libc/libm function,
+  /// with a "__builtin_" prefix (e.g. __builtin_abs).
+  bool isLibFunction(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'F') != nullptr;
+  }
+
+  /// Determines whether this builtin is a predefined libc/libm
+  /// function, such as "malloc", where we know the signature a
+  /// priori.
+  bool isPredefinedLibFunction(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'f') != nullptr;
+  }
+
+  /// Returns true if this builtin requires appropriate header in other
+  /// compilers. In Clang it will work even without including it, but we can emit
+  /// a warning about missing header.
+  bool isHeaderDependentFunction(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'h') != nullptr;
+  }
+
+  /// Determines whether this builtin is a predefined compiler-rt/libgcc
+  /// function, such as "__clear_cache", where we know the signature a
+  /// priori.
+  bool isPredefinedRuntimeFunction(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'i') != nullptr;
+  }
+
+  /// Determines whether this builtin has custom typechecking.
+  bool hasCustomTypechecking(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 't') != nullptr;
+  }
+
+  /// Determines whether this builtin has a result or any arguments which
+  /// are pointer types.
+  bool hasPtrArgsOrResult(unsigned ID) const {
+    return strchr(getRecord(ID).Type, '*') != nullptr;
+  }
+
+  /// Return true if this builtin has a result or any arguments which are
+  /// reference types.
+  bool hasReferenceArgsOrResult(unsigned ID) const {
+    return strchr(getRecord(ID).Type, '&') != nullptr ||
+           strchr(getRecord(ID).Type, 'A') != nullptr;
+  }
+
+  /// Completely forget that the given ID was ever considered a builtin,
+  /// e.g., because the user provided a conflicting signature.
+  void forgetBuiltin(unsigned ID, IdentifierTable &Table);
+
+  /// If this is a library function that comes from a specific
+  /// header, retrieve that header name.
+  const char *getHeaderName(unsigned ID) const {
+    return getRecord(ID).HeaderName;
+  }
+
+  /// Determine whether this builtin is like printf in its
+  /// formatting rules and, if so, set the index to the format string
+  /// argument and whether this function as a va_list argument.
+  bool isPrintfLike(unsigned ID, unsigned &FormatIdx, bool &HasVAListArg);
+
+  /// Determine whether this builtin is like scanf in its
+  /// formatting rules and, if so, set the index to the format string
+  /// argument and whether this function as a va_list argument.
+  bool isScanfLike(unsigned ID, unsigned &FormatIdx, bool &HasVAListArg);
+
+  /// Determine whether this builtin has callback behavior (see
+  /// llvm::AbstractCallSites for details). If so, add the index to the
+  /// callback callee argument and the callback payload arguments.
+  bool performsCallback(unsigned ID,
+                        llvm::SmallVectorImpl<int> &Encoding) const;
+
+  /// Return true if this function has no side effects and doesn't
+  /// read memory, except for possibly errno.
+  ///
+  /// Such functions can be const when the MathErrno lang option is disabled.
+  bool isConstWithoutErrno(unsigned ID) const {
+    return strchr(getRecord(ID).Attributes, 'e') != nullptr;
+  }
+
+  const char *getRequiredFeatures(unsigned ID) const {
+    return getRecord(ID).Features;
+  }
+
+  unsigned getRequiredVectorWidth(unsigned ID) const;
+
+  /// Return true if builtin ID belongs to AuxTarget.
+  bool isAuxBuiltinID(unsigned ID) const {
+    return ID >= (Builtin::FirstTSBuiltin + TSRecords.size());
+  }
+
+  /// Return real builtin ID (i.e. ID it would have during compilation
+  /// for AuxTarget).
+  unsigned getAuxBuiltinID(unsigned ID) const { return ID - TSRecords.size(); }
+
+  /// Returns true if this is a libc/libm function without the '__builtin_'
+  /// prefix.
+  static bool isBuiltinFunc(const char *Name);
+
+  /// Returns true if this is a builtin that can be redeclared.  Returns true
+  /// for non-builtins.
+  bool canBeRedeclared(unsigned ID) const;
+
+private:
+  const Info &getRecord(unsigned ID) const;
+
+  /// Is this builtin supported according to the given language options?
+  bool builtinIsSupported(const Builtin::Info &BuiltinInfo,
+                          const LangOptions &LangOpts);
+
+  /// Helper function for isPrintfLike and isScanfLike.
+  bool isLike(unsigned ID, unsigned &FormatIdx, bool &HasVAListArg,
+              const char *Fmt) const;
+};
+
+/// For a given BuiltinID, return the ID of the fortified variant function. For
+/// instance, if Builtin::BIsprintf is passed, this function will return
+/// Builtin::BI__builtin___sprintf_chk. If BuiltinID doesn't have a fortified
+/// variant, 0 is returned.
+unsigned getFortifiedVariantFunction(unsigned BuiltinID);
+
+} // end namespace Builtin
+
+/// Kinds of BuiltinTemplateDecl.
+enum BuiltinTemplateKind : int {
+  /// This names the __make_integer_seq BuiltinTemplateDecl.
+  BTK__make_integer_seq,
+
+  /// This names the __type_pack_element BuiltinTemplateDecl.
+  BTK__type_pack_element
+};
+
+} // end namespace clang
+#endif