[analyzer] PR43551: Do not dereferce void* in UndefOrNullArgVisitor.

Patch by Kristóf Umann!

Differential Revision: https://reviews.llvm.org/D68591

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@375329 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 5 deletions

diff --git a/test/Analysis/novoidtypecrash.c b/test/Analysis/novoidtypecrash.c
index c04cfca29b..b19990a279 100644
--- a/test/Analysis/novoidtypecrash.c
+++ b/test/Analysis/novoidtypecrash.c
@@ -1,8 +1,27 @@
 // RUN: %clang_analyze_cc1 -analyzer-checker=core %s
+x;
+y(void **z) { // no-crash
+  *z = x;
+  int *w;
+  y(&w);
+  *w;
+}
+
 a;
-b(void **c) { // no-crash
-  *c = a;
-  int *d;
-  b(&d);
-  *d;
+b(*c) {}
+e(*c) {
+  void *d = f();
+  b(d);
+  *c = d;
+}
+void *g() {
+  e(&a);
+  return a;
+}
+j() {
+  int h;
+  char i = g();
+  if (i)
+    for (; h;)
+      ;
 }