1 files changed, 22 insertions, 0 deletions
diff --git a/test/Sema/implicit-builtin-decl.c b/test/Sema/implicit-builtin-decl.c
new file mode 100644
index 0000000000..3faef0b719
--- /dev/null
+++ b/test/Sema/implicit-builtin-decl.c
@@ -0,0 +1,22 @@
+// RUN: clang -fsyntax-only -verify %s
+void f() {
+  int *ptr = malloc(sizeof(int) * 10); // expected-warning{{implicitly declaring C library function 'malloc' with type}} \
+  // expected-note{{please include the header <stdlib.h> or explicitly provide a declaration for 'malloc'}} \
+  // expected-note{{'malloc' was implicitly declared here with type 'void *}}
+}
+
+void *alloca(__SIZE_TYPE__); // redeclaration okay
+
+int *calloc(__SIZE_TYPE__, __SIZE_TYPE__); // expected-error{{conflicting types for 'calloc'}} \
+                    // expected-note{{'calloc' was implicitly declared here with type 'void *}}
+
+
+void g(int malloc) { // okay: these aren't functions
+  int calloc = 1;
+}
+
+void h() {
+  int malloc(int); // expected-error{{conflicting types for 'malloc'}}
+  int strcpy(int); // expected-error{{conflicting types for 'strcpy'}} \
+  // expected-note{{'strcpy' was implicitly declared here with type 'char *(char *, char const *)'}}
+}