Tom Care | c4b5bd8 | 2010-07-23 23:04:53 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -analyze -analyzer-experimental-checks -analyzer-check-objc-mem -analyzer-check-dead-stores -verify -analyzer-opt-analyze-nested-blocks %s |
| 2 | |
| 3 | extern void foo(int a); |
| 4 | |
| 5 | void test(unsigned a) { |
| 6 | switch (a) { |
| 7 | a += 5; // expected-warning{{never executed}} |
| 8 | case 2: |
| 9 | a *= 10; |
| 10 | case 3: |
| 11 | a %= 2; |
| 12 | } |
| 13 | foo(a); |
| 14 | } |
| 15 | |
| 16 | void test2(unsigned a) { |
| 17 | help: |
| 18 | if (a > 0) |
| 19 | return; |
| 20 | if (a == 0) |
| 21 | return; |
| 22 | foo(a); // expected-warning{{never executed}} |
| 23 | goto help; |
| 24 | } |
| 25 | |
| 26 | void test3() { |
| 27 | int a = 5; |
| 28 | |
| 29 | while (a > 1) |
| 30 | a -= 2; |
| 31 | |
| 32 | if (a > 1) { |
| 33 | a = a + 56; // expected-warning{{never executed}} |
| 34 | } |
| 35 | |
| 36 | foo(a); |
| 37 | } |
| 38 | |
| 39 | void test4(unsigned a) { |
| 40 | while(1); |
| 41 | if (a > 5) { // expected-warning{{never executed}} |
| 42 | return; |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | extern void bar(char c); |
| 47 | |
| 48 | void test5(const char *c) { |
| 49 | foo(c[0]); |
| 50 | |
| 51 | if (!c) { |
| 52 | bar(1); // expected-warning{{never executed}} |
| 53 | } |
| 54 | } |
| 55 | |
Jordy Rose | 5e04bdd | 2010-07-27 03:39:53 +0000 | [diff] [blame] | 56 | void test6(const char *c) { |
| 57 | if (c) return; |
| 58 | if (!c) return; |
| 59 | __builtin_unreachable(); // no-warning |
| 60 | } |
| 61 | |