move the various builtins stuff from libast to libbasic. This

fixes a layering violation in lib/Basic/Targets.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73318 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 137 insertions, 0 deletions

diff --git a/include/clang/Basic/Builtins.h b/include/clang/Basic/Builtins.h
new file mode 100644
index 0000000000..a18faf688f
--- /dev/null
+++ b/include/clang/Basic/Builtins.h
@@ -0,0 +1,137 @@
+//===--- Builtins.h - Builtin function header -------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines enum values for all the target-independent builtin
+// functions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_BUILTINS_H
+#define LLVM_CLANG_BASIC_BUILTINS_H
+
+#include <cstring>
+
+namespace llvm {
+  template <typename T> class SmallVectorImpl;
+}
+
+namespace clang {
+  class TargetInfo;
+  class IdentifierTable;
+  class ASTContext;
+  class QualType;
+
+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;
+  bool Suppressed;
+
+  bool operator==(const Info &RHS) const {
+    return !strcmp(Name, RHS.Name) &&
+           !strcmp(Type, RHS.Type) &&
+           !strcmp(Attributes, RHS.Attributes);
+  }
+  bool operator!=(const Info &RHS) const { return !(*this == RHS); }
+};
+
+/// Builtin::Context - This holds information about target-independent and
+/// target-specific builtins, allowing easy queries by clients.
+class Context {
+  const Info *TSRecords;
+  unsigned NumTSRecords;
+public:
+  Context() : TSRecords(0), NumTSRecords(0) {}
+
+  /// \brief Load all of the target builtins. This should be called
+  /// prior to initializing the builtin identifiers.
+  void InitializeTargetBuiltins(const TargetInfo &Target);
+
+  /// InitializeBuiltins - 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, bool NoBuiltins = false);
+
+  /// \brief Popular the vector with the names of all of the builtins.
+  void GetBuiltinNames(llvm::SmallVectorImpl<const char *> &Names,
+                       bool NoBuiltins);
+  
+  /// Builtin::GetName - Return the identifier name for the specified builtin,
+  /// e.g. "__builtin_abs".
+  const char *GetName(unsigned ID) const {
+    return GetRecord(ID).Name;
+  }
+  
+  /// GetTypeString - Get the type descriptor string for the specified builtin.
+  const char *GetTypeString(unsigned ID) const {
+    return GetRecord(ID).Type;
+  }
+  
+  /// isConst - 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') != 0;
+  }
+  
+  /// isNoThrow - Return true if we know this builtin never throws an exception.
+  bool isNoThrow(unsigned ID) const {
+    return strchr(GetRecord(ID).Attributes, 'n') != 0;
+  }
+  
+  /// isLibFunction - 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') != 0;
+  }
+  
+  /// \brief 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') != 0;
+  }
+
+  /// \brief 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;
+  }
+
+  /// \brief 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);
+
+  /// hasVAListUse - Return true of the specified builtin uses __builtin_va_list
+  /// as an operand or return type.
+  bool hasVAListUse(unsigned ID) const {
+    return strpbrk(GetRecord(ID).Type, "Aa") != 0;
+  }
+  
+  /// isConstWithoutErrno - 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') != 0;
+  }
+
+private:
+  const Info &GetRecord(unsigned ID) const;
+};
+
+}
+} // end namespace clang
+#endif