Change the representation of builtin functions in the AST

(__builtin_* etc.) so that it isn't possible to take their address.
Specifically, introduce a new type to represent a reference to a builtin
function, and a new cast kind to convert it to a function pointer in the
operand of a call.  Fixes PR13195.

llvm-svn: 162962

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp b/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp
index 56858f4883e..8881f26366b 100644
--- a/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp
+++ b/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp
@@ -266,7 +266,8 @@ void ExprEngine::VisitCast(const CastExpr *CastE, const Expr *Ex,
       case CK_NoOp:
       case CK_ConstructorConversion:
       case CK_UserDefinedConversion:
-      case CK_FunctionToPointerDecay: {
+      case CK_FunctionToPointerDecay:
+      case CK_BuiltinFnToFnPtr: {
         // Copy the SVal of Ex to CastE.
         ProgramStateRef state = Pred->getState();
         const LocationContext *LCtx = Pred->getLocationContext();