1 files changed, 50 insertions, 0 deletions
diff --git a/test/Sema/implicit-decl-c90.c b/test/Sema/implicit-decl-c90.c
new file mode 100644
index 0000000000000..6b3491cff7cfa
--- /dev/null
+++ b/test/Sema/implicit-decl-c90.c
@@ -0,0 +1,50 @@
+// RUN: %clang_cc1 %s -std=c90 -verify -fsyntax-only
+void t0(int x) {
+  int explicit_decl();
+  int (*p)();
+  if(x > 0)
+    x = g() + 1; // expected-note {{previous implicit declaration}}
+  p = g;
+  if(x < 0) {
+    extern void u(int (*)[h()]);
+    int (*q)() = h;
+  }
+  p = h; /* expected-error {{use of undeclared identifier 'h'}} */
+}
+
+void t1(int x) {
+  int (*p)();
+  switch (x) {
+    g();
+  case 0:
+    x = h() + 1;
+    break;
+  case 1:
+    p = g;
+    p = h;
+    break;
+  }
+  p = g; /* expected-error {{use of undeclared identifier 'g'}} */
+  p = h; /* expected-error {{use of undeclared identifier 'h'}} */
+  explicit_decl();
+  p = explicit_decl;
+}
+
+int t2(int x) {
+  int y = ({ if (x > 0) x = g() + 1; 2*x; });
+  int (*p)() = g; /* expected-error {{use of undeclared identifier 'g'}} */
+  return y;
+}
+
+int PR34822() {
+  {int i = sizeof(PR34822_foo());} /* expected-note {{previous definition is here}} */
+  {extern int PR34822_foo;} /* expected-error {{redefinition of 'PR34822_foo' as different kind of symbol}} */
+
+  {extern int PR34822_bar;} /* expected-note {{previous declaration is here}} */
+  {int i = sizeof(PR34822_bar());} /* expected-warning {{use of out-of-scope declaration of 'PR34822_bar' whose type is not compatible with that of an implicit declaration}} expected-error {{called object type 'int' is not a function or function pointer}} */
+}
+
+int (*p)() = g; /* expected-error {{use of undeclared identifier 'g'}} */
+int (*q)() = h; /* expected-error {{use of undeclared identifier 'h'}} */
+
+float g(); /* expected-error {{conflicting types for 'g'}} */