| 1 | // RUN: %clang_cc1 %s -fsyntax-only -verify -triple x86_64-pc-linux-gnu -Wno-unevaluated-expression |
| 2 | |
| 3 | typedef unsigned __uint32_t; |
| 4 | |
| 5 | #define __byte_swap_int_var(x) \ |
| 6 | __extension__ ({ register __uint32_t __X = (x); \ |
| 7 | __asm ("bswap %0" : "+r" (__X)); \ |
| 8 | __X; }) |
| 9 | |
| 10 | int test(int _x) { |
| 11 | return (__byte_swap_int_var(_x)); |
| 12 | } |
| 13 | |
| 14 | // PR2374 |
| 15 | int test2() { return ({L:5;}); } |
| 16 | int test3() { return ({ {5;} }); } // expected-error {{returning 'void' from a function with incompatible result type 'int'}}\ |
| 17 | // expected-warning {{expression result unused}} |
| 18 | int test4() { return ({ ({5;}); }); } |
| 19 | int test5() { return ({L1: L2: L3: 5;}); } |
| 20 | int test6() { return ({5;}); } |
| 21 | void test7() { ({5;}); } // expected-warning {{expression result unused}} |
| 22 | |
| 23 | // PR3062 |
| 24 | int test8[({10;})]; // expected-error {{statement expression not allowed at file scope}} |
| 25 | |
| 26 | // PR3912 |
| 27 | void test9(const void *P) { |
| 28 | __builtin_prefetch(P); |
| 29 | } |
| 30 | |
| 31 | |
| 32 | void *test10() { |
| 33 | bar: |
| 34 | return &&bar; // expected-warning {{returning address of label, which is local}} |
| 35 | } |
| 36 | |
| 37 | // PR38569: Don't warn when returning a label from a statement expression. |
| 38 | void test10_logpc(void*); |
| 39 | void test10a() { |
| 40 | test10_logpc(({ |
| 41 | my_pc: |
| 42 | &&my_pc; |
| 43 | })); |
| 44 | } |
| 45 | |
| 46 | // PR6034 |
| 47 | void test11(int bit) { |
| 48 | switch (bit) |
| 49 | switch (env->fpscr) // expected-error {{use of undeclared identifier 'env'}} |
| 50 | { |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | // rdar://3271964 |
| 55 | enum Numbers { kOne, kTwo, kThree, kFour}; |
| 56 | int test12(enum Numbers num) { |
| 57 | switch (num == kOne) {// expected-warning {{switch condition has boolean value}} |
| 58 | default: |
| 59 | case kThree: |
| 60 | break; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | |
| 65 | enum x { a, b, c, d, e, f, g }; |
| 66 | |
| 67 | void foo(enum x X) { |
| 68 | switch (X) { // expected-warning {{enumeration value 'g' not handled in switch}} |
| 69 | case a: |
| 70 | case b: |
| 71 | case c: |
| 72 | case d: |
| 73 | case e: |
| 74 | case f: |
| 75 | break; |
| 76 | } |
| 77 | |
| 78 | switch (X) { // expected-warning {{enumeration values 'f' and 'g' not handled in switch}} |
| 79 | case a: |
| 80 | case b: |
| 81 | case c: |
| 82 | case d: |
| 83 | case e: |
| 84 | break; |
| 85 | } |
| 86 | |
| 87 | switch (X) { // expected-warning {{enumeration values 'e', 'f', and 'g' not handled in switch}} |
| 88 | case a: |
| 89 | case b: |
| 90 | case c: |
| 91 | case d: |
| 92 | break; |
| 93 | } |
| 94 | |
| 95 | switch (X) { // expected-warning {{5 enumeration values not handled in switch: 'c', 'd', 'e'...}} |
| 96 | case a: |
| 97 | case b: |
| 98 | break; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | int test_pr8880() { |
| 103 | int first = 1; |
| 104 | for ( ; ({ if (first) { first = 0; continue; } 0; }); ) |
| 105 | return 0; |
| 106 | return 1; |
| 107 | } |
| 108 | |
| 109 | // In PR22849, we considered __ptr to be a static data member of the anonymous |
| 110 | // union. Now we declare it in the parent DeclContext. |
| 111 | void test_pr22849() { |
| 112 | struct Bug { |
| 113 | typeof(({ unsigned long __ptr; (int *)(0); })) __val; |
| 114 | union Nested { |
| 115 | typeof(({ unsigned long __ptr; (int *)(0); })) __val; |
| 116 | } n; |
| 117 | }; |
| 118 | enum E { |
| 119 | SIZE = sizeof(({unsigned long __ptr; __ptr;})) |
| 120 | }; |
| 121 | } |
| 122 | |