1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 
3 void f(int x) {
4   char foo[10];
5   int bar[20];
6   char qux[30];
7 
8   (void)sizeof(bar + 10); // expected-warning{{sizeof on pointer operation will return size of 'int *' instead of 'int [20]'}}
9   (void)sizeof(foo - 20); // expected-warning{{sizeof on pointer operation will return size of 'char *' instead of 'char [10]'}}
10   (void)sizeof(bar - x); // expected-warning{{sizeof on pointer operation will return size of 'int *' instead of 'int [20]'}}
11   (void)sizeof(foo + x); // expected-warning{{sizeof on pointer operation will return size of 'char *' instead of 'char [10]'}}
12 
13   // This is ptrdiff_t.
14   (void)sizeof(foo - qux); // no-warning
15 
16   (void)sizeof(foo, x); // no-warning
17   (void)sizeof(x, foo); // expected-warning{{sizeof on pointer operation will return size of 'char *' instead of 'char [10]'}}
18 }
19