svn commit: r251790 - in head/contrib/llvm/tools/clang: include/clang/Basic lib/Sema

[Andrew Turner]

Author: andrew
Date: Sat Jun 15 12:13:22 2013
New Revision: 251790
URL: http://svnweb.freebsd.org/changeset/base/251790

Log:
  Pull in r183926 from LLVM trunk:
  
    Allow clang to build __clear_cache on ARM.
  
    __clear_cache is special. It needs no signature, but is a real function in
    compiler_rt or libgcc.
  
    Patch by Andrew Turner.
  
  This allows us to build the __clear_cache function in compiler-rt.

Modified:
  head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.def
  head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.h
  head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsAArch64.def
  head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsARM.def
  head/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp

Modified: head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.def
==============================================================================
--- head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.def	Sat Jun 15 10:38:31 2013	(r251789)
+++ head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.def	Sat Jun 15 12:13:22 2013	(r251790)
@@ -70,6 +70,8 @@
 //  f -> this is a libc/libm function without the '__builtin_' prefix. It can
 //       be followed by ':headername:' to state which header this function
 //       comes from.
+//  i -> this is a runtime library implemented function without the
+//       '__builtin_' prefix. It will be implemented in compiter-rt or libgcc.
 //  p:N: -> this is a printf-like function whose Nth argument is the format
 //          string.
 //  P:N: -> similar to the p:N: attribute, but the function is like vprintf

Modified: head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.h
==============================================================================
--- head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.h	Sat Jun 15 10:38:31 2013	(r251789)
+++ head/contrib/llvm/tools/clang/include/clang/Basic/Builtins.h	Sat Jun 15 12:13:22 2013	(r251790)
@@ -128,6 +128,13 @@ public:
     return strchr(GetRecord(ID).Attributes, 'f') != 0;
   }
 
+  /// \brief 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') != 0;
+  }
+
   /// \brief Determines whether this builtin has custom typechecking.
   bool hasCustomTypechecking(unsigned ID) const {
     return strchr(GetRecord(ID).Attributes, 't') != 0;

Modified: head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsAArch64.def
==============================================================================
--- head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsAArch64.def	Sat Jun 15 10:38:31 2013	(r251789)
+++ head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsAArch64.def	Sat Jun 15 12:13:22 2013	(r251790)
@@ -15,4 +15,4 @@
 // The format of this database matches clang/Basic/Builtins.def.
 
 // In libgcc
-BUILTIN(__clear_cache, "vv*v*", "")
+BUILTIN(__clear_cache, "vv*v*", "i")

Modified: head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsARM.def
==============================================================================
--- head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsARM.def	Sat Jun 15 10:38:31 2013	(r251789)
+++ head/contrib/llvm/tools/clang/include/clang/Basic/BuiltinsARM.def	Sat Jun 15 12:13:22 2013	(r251790)
@@ -15,7 +15,7 @@
 // The format of this database matches clang/Basic/Builtins.def.
 
 // In libgcc
-BUILTIN(__clear_cache, "v.", "")
+BUILTIN(__clear_cache, "v.", "i")
 BUILTIN(__builtin_thread_pointer, "v*", "")
 
 // Saturating arithmetic

Modified: head/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp
==============================================================================
--- head/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp	Sat Jun 15 10:38:31 2013	(r251789)
+++ head/contrib/llvm/tools/clang/lib/Sema/SemaDecl.cpp	Sat Jun 15 12:13:22 2013	(r251790)
@@ -8671,7 +8671,8 @@ Decl *Sema::ActOnStartOfFunctionDef(Scop
 
   // Builtin functions cannot be defined.
   if (unsigned BuiltinID = FD->getBuiltinID()) {
-    if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) {
+    if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID) &&
+        !Context.BuiltinInfo.isPredefinedRuntimeFunction(BuiltinID)) {
       Diag(FD->getLocation(), diag::err_builtin_definition) << FD;
       FD->setInvalidDecl();
     }