[CrossTU] Handle case when no USR could be generated during Decl search.

Summary:
When searching for a declaration to be loaded the "lookup name" for every
other Decl is computed. If the USR can not be determined here should be
not an assert, instead skip this Decl.

Reviewers: martong

Reviewed By: martong

Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65445

llvm-svn: 368020

1 files changed, 14 insertions, 0 deletions

diff --git a/clang/test/Analysis/ctu-main.cpp b/clang/test/Analysis/ctu-main.cpp
index 1cb0d4a9d77..aae4808e90f 100644
--- a/clang/test/Analysis/ctu-main.cpp
+++ b/clang/test/Analysis/ctu-main.cpp
@@ -112,6 +112,19 @@ void test_virtual_functions(mycls* obj) {
   clang_analyzer_eval(obj->fvcl(1) == 8);      // expected-warning{{FALSE}} expected-warning{{TRUE}}
 }
 
+class TestAnonUnionUSR {
+public:
+  inline float f(int value) {
+    union {
+      float f;
+      int i;
+    };
+    i = value;
+    return f;
+  }
+  static const int Test;
+};
+
 int main() {
   clang_analyzer_eval(f(3) == 2); // expected-warning{{TRUE}}
   clang_analyzer_eval(f(4) == 3); // expected-warning{{TRUE}}
@@ -144,4 +157,5 @@ int main() {
   clang_analyzer_eval(extSubSCN.a == 1); // expected-warning{{TRUE}}
   // clang_analyzer_eval(extSCC.a == 7); // TODO
   clang_analyzer_eval(extU.a == 4); // expected-warning{{TRUE}}
+  clang_analyzer_eval(TestAnonUnionUSR::Test == 5); // expected-warning{{TRUE}}
 }