Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1 | // RUN: %clang_cc1 %s -verify |
| 2 | // RUN: %clang_cc1 %s -DCODEGEN -emit-llvm -o - | FileCheck %s |
| 3 | |
| 4 | #define O_CREAT 0x100 |
| 5 | typedef int mode_t; |
| 6 | typedef unsigned long size_t; |
| 7 | |
| 8 | int open(const char *pathname, int flags) __attribute__((enable_if(!(flags & O_CREAT), "must specify mode when using O_CREAT"))) __attribute__((overloadable)); // expected-note{{candidate disabled: must specify mode when using O_CREAT}} |
| 9 | int open(const char *pathname, int flags, mode_t mode) __attribute__((overloadable)); // expected-note{{candidate function not viable: requires 3 arguments, but 2 were provided}} |
| 10 | |
| 11 | void test1() { |
| 12 | #ifndef CODEGEN |
| 13 | open("path", O_CREAT); // expected-error{{no matching function for call to 'open'}} |
| 14 | #endif |
| 15 | open("path", O_CREAT, 0660); |
| 16 | open("path", 0); |
| 17 | open("path", 0, 0); |
| 18 | } |
| 19 | |
| 20 | size_t __strnlen_chk(const char *s, size_t requested_amount, size_t s_len); |
| 21 | |
| 22 | size_t strnlen(const char *s, size_t maxlen) // expected-note{{candidate function}} |
| 23 | __attribute__((overloadable)) |
| 24 | __asm__("strnlen_real1"); |
| 25 | |
| 26 | __attribute__((always_inline)) |
| 27 | inline size_t strnlen(const char *s, size_t maxlen) // expected-note{{candidate function}} |
| 28 | __attribute__((overloadable)) |
| 29 | __attribute__((enable_if(__builtin_object_size(s, 0) != -1, |
| 30 | "chosen when target buffer size is known"))) |
| 31 | { |
| 32 | return __strnlen_chk(s, maxlen, __builtin_object_size(s, 0)); |
| 33 | } |
| 34 | |
| 35 | size_t strnlen(const char *s, size_t maxlen) // expected-note{{candidate disabled: chosen when 'maxlen' is known to be less than or equal to the buffer size}} |
| 36 | __attribute__((overloadable)) |
| 37 | __attribute__((enable_if(__builtin_object_size(s, 0) != -1, |
| 38 | "chosen when target buffer size is known"))) |
| 39 | __attribute__((enable_if(maxlen <= __builtin_object_size(s, 0), |
| 40 | "chosen when 'maxlen' is known to be less than or equal to the buffer size"))) |
| 41 | __asm__("strnlen_real2"); |
| 42 | |
| 43 | size_t strnlen(const char *s, size_t maxlen) // expected-note{{candidate function has been explicitly made unavailable}} |
| 44 | __attribute__((overloadable)) |
| 45 | __attribute__((enable_if(__builtin_object_size(s, 0) != -1, |
| 46 | "chosen when target buffer size is known"))) |
| 47 | __attribute__((enable_if(maxlen > __builtin_object_size(s, 0), |
| 48 | "chosen when 'maxlen' is larger than the buffer size"))) |
| 49 | __attribute__((unavailable("'maxlen' is larger than the buffer size"))); |
| 50 | |
| 51 | void test2(const char *s, int i) { |
| 52 | // CHECK: define void @test2 |
| 53 | const char c[123]; |
| 54 | strnlen(s, i); |
| 55 | // CHECK: call {{.*}}strnlen_real1 |
| 56 | strnlen(s, 999); |
| 57 | // CHECK: call {{.*}}strnlen_real1 |
| 58 | strnlen(c, 1); |
| 59 | // CHECK: call {{.*}}strnlen_real2 |
| 60 | strnlen(c, i); |
| 61 | // CHECK: call {{.*}}strnlen_chk |
| 62 | #ifndef CODEGEN |
| 63 | strnlen(c, 999); // expected-error{{call to unavailable function 'strnlen': 'maxlen' is larger than the buffer size}} |
| 64 | #endif |
| 65 | } |
| 66 | |
| 67 | int isdigit(int c) __attribute__((overloadable)); // expected-note{{candidate function}} |
| 68 | int isdigit(int c) __attribute__((overloadable)) // expected-note{{candidate function has been explicitly made unavailable}} |
| 69 | __attribute__((enable_if(c <= -1 || c > 255, "'c' must have the value of an unsigned char or EOF"))) |
| 70 | __attribute__((unavailable("'c' must have the value of an unsigned char or EOF"))); |
| 71 | |
| 72 | void test3(int c) { |
| 73 | isdigit(c); |
| 74 | isdigit(10); |
| 75 | #ifndef CODEGEN |
| 76 | isdigit(-10); // expected-error{{call to unavailable function 'isdigit': 'c' must have the value of an unsigned char or EOF}} |
| 77 | #endif |
| 78 | } |
| 79 | |
| 80 | #ifndef CODEGEN |
| 81 | __attribute__((enable_if(n == 0, "chosen when 'n' is zero"))) void f1(int n); // expected-error{{use of undeclared identifier 'n'}} |
| 82 | |
| 83 | int n __attribute__((enable_if(1, "always chosen"))); // expected-warning{{'enable_if' attribute only applies to functions}} |
| 84 | |
| 85 | void f(int n) __attribute__((enable_if("chosen when 'n' is zero", n == 0))); // expected-error{{'enable_if' attribute requires a string}} |
| 86 | |
| 87 | void f(int n) __attribute__((enable_if())); // expected-error{{'enable_if' attribute requires exactly 2 arguments}} |
| 88 | |
| 89 | void f(int n) __attribute__((enable_if(unresolvedid, "chosen when 'unresolvedid' is non-zero"))); // expected-error{{use of undeclared identifier 'unresolvedid'}} |
| 90 | |
| 91 | int global; |
| 92 | void f(int n) __attribute__((enable_if(global == 0, "chosen when 'global' is zero"))); // expected-error{{'enable_if' attribute expression never produces a constant expression}} // expected-note{{subexpression not valid in a constant expression}} |
| 93 | |
| 94 | const int cst = 7; |
| 95 | void return_cst(void) __attribute__((overloadable)) __attribute__((enable_if(cst == 7, "chosen when 'cst' is 7"))); |
| 96 | void test_return_cst() { return_cst(); } |
| 97 | #endif |