[Analyzer] Handle implicit function reference in bodyfarming std::call_once

Differential Revision: https://reviews.llvm.org/D39201

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@316402 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 0 deletions

diff --git a/test/Analysis/call_once.cpp b/test/Analysis/call_once.cpp
index db701457f6..2154be6f48 100644
--- a/test/Analysis/call_once.cpp
+++ b/test/Analysis/call_once.cpp
@@ -290,3 +290,16 @@ void test_mutator_noref() {
   std::call_once(flag, &fail_mutator, a);
   clang_analyzer_eval(a == 42); // expected-warning{{FALSE}}
 }
+
+// Function is implicitly treated as a function pointer
+// even when an ampersand is not explicitly set.
+void callbackn(int &param) {
+  param = 42;
+};
+void test_implicit_funcptr() {
+  int x = 0;
+  static std::once_flag flagn;
+
+  std::call_once(flagn, callbackn, x);
+  clang_analyzer_eval(x == 42); // expected-warning{{TRUE}}
+}