1*67e74705SXin Li // RUN: %clang_cc1 -verify -Wno-string-plus-int -Warray-bounds-pointer-arithmetic %s 2*67e74705SXin Li swallow(const char * x)3*67e74705SXin Livoid swallow (const char *x) { (void)x; } test_pointer_arithmetic(int n)4*67e74705SXin Livoid test_pointer_arithmetic(int n) { 5*67e74705SXin Li const char hello[] = "Hello world!"; // expected-note 2 {{declared here}} 6*67e74705SXin Li const char *helloptr = hello; 7*67e74705SXin Li 8*67e74705SXin Li swallow("Hello world!" + 6); // no-warning 9*67e74705SXin Li swallow("Hello world!" - 6); // expected-warning {{refers before the beginning of the array}} 10*67e74705SXin Li swallow("Hello world!" + 14); // expected-warning {{refers past the end of the array}} 11*67e74705SXin Li swallow("Hello world!" + 13); // no-warning 12*67e74705SXin Li 13*67e74705SXin Li swallow(hello + 6); // no-warning 14*67e74705SXin Li swallow(hello - 6); // expected-warning {{refers before the beginning of the array}} 15*67e74705SXin Li swallow(hello + 14); // expected-warning {{refers past the end of the array}} 16*67e74705SXin Li swallow(hello + 13); // no-warning 17*67e74705SXin Li 18*67e74705SXin Li swallow(helloptr + 6); // no-warning 19*67e74705SXin Li swallow(helloptr - 6); // no-warning 20*67e74705SXin Li swallow(helloptr + 14); // no-warning 21*67e74705SXin Li swallow(helloptr + 13); // no-warning 22*67e74705SXin Li 23*67e74705SXin Li double numbers[2]; // expected-note {{declared here}} 24*67e74705SXin Li swallow((char*)numbers + sizeof(double)); // no-warning 25*67e74705SXin Li swallow((char*)numbers + 60); // expected-warning {{refers past the end of the array}} 26*67e74705SXin Li 27*67e74705SXin Li char buffer[5]; // expected-note 2 {{declared here}} 28*67e74705SXin Li // TODO: Add FixIt notes for adding parens around non-ptr part of arith expr 29*67e74705SXin Li swallow(buffer + sizeof("Hello")-1); // expected-warning {{refers past the end of the array}} 30*67e74705SXin Li swallow(buffer + (sizeof("Hello")-1)); // no-warning 31*67e74705SXin Li if (n > 0 && n <= 6) swallow(buffer + 6 - n); // expected-warning {{refers past the end of the array}} 32*67e74705SXin Li if (n > 0 && n <= 6) swallow(buffer + (6 - n)); // no-warning 33*67e74705SXin Li } 34