Make sure we aggressively attach nounwind (etc.) to calls to library

functions of the form __builtin_XXX.

llvm-svn: 128198

clang/lib/CodeGen/CGBuiltin.cpp

@@ -948,8 +948,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
       getContext().BuiltinInfo.isPredefinedLibFunction(BuiltinID))
     return EmitCall(E->getCallee()->getType(),
                     CGM.getBuiltinLibFunction(FD, BuiltinID),
-                    ReturnValueSlot(),
-                    E->arg_begin(), E->arg_end());
+                    ReturnValueSlot(), E->arg_begin(), E->arg_end(), FD);
 
   // See if we have a target specific intrinsic.
   const char *Name = getContext().BuiltinInfo.GetName(BuiltinID);

clang/test/CodeGen/builtin-attributes.c

@@ -10,3 +10,8 @@ void f0() {
 void f1() {
   exit(1);
 }
+
+// CHECK: call i8* @strstr{{.*}} nounwind
+char* f2(char* a, char* b) {
+  return __builtin_strstr(a, b);
+}