1 files changed, 53 insertions, 0 deletions
diff --git a/test/Sema/implicit-builtin-decl.c b/test/Sema/implicit-builtin-decl.c
new file mode 100644
index 0000000..696a2b9
--- /dev/null
+++ b/test/Sema/implicit-builtin-decl.c
@@ -0,0 +1,53 @@
+// RUN: clang-cc -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' is a builtin with type 'void *}}
+}
+
+void *alloca(__SIZE_TYPE__); // redeclaration okay
+
+int *calloc(__SIZE_TYPE__, __SIZE_TYPE__); // expected-warning{{incompatible redeclaration of library function 'calloc'}} \
+                    // expected-note{{'calloc' is a builtin with type 'void *}}
+
+
+void g(int malloc) { // okay: these aren't functions
+  int calloc = 1;
+}
+
+void h() {
+  int malloc(int); // expected-warning{{incompatible redeclaration of library function 'malloc'}}
+  int strcpy(int); // expected-warning{{incompatible redeclaration of library function 'strcpy'}} \
+  // expected-note{{'strcpy' is a builtin with type 'char *(char *, char const *)'}}
+}
+
+void f2() {
+  fprintf(0, "foo"); // expected-error{{implicit declaration of 'fprintf' requires inclusion of the header <stdio.h>}}
+}
+
+// PR2892
+void __builtin_object_size(); // expected-error{{conflicting types}} \
+// expected-note{{'__builtin_object_size' is a builtin with type}}
+
+int a[10];
+
+int f0() {
+  return __builtin_object_size(&a); // expected-error {{too few arguments to function}}
+}
+
+void * realloc(void *p, int size) { // expected-warning{{incompatible redeclaration of library function 'realloc'}} \
+// expected-note{{'realloc' is a builtin with type 'void *(void *,}}
+  return p;
+}
+
+// PR3855
+void snprintf(); // expected-warning{{incompatible redeclaration of library function 'snprintf'}} \
+    // expected-note{{'snprintf' is a builtin}}
+
+int
+main(int argc, char *argv[])
+{
+  snprintf();
+}
+
+void snprintf() { }