| 1 | // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -Wunreachable-code-aggressive -fblocks -verify %s |
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| 2 | |
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| 3 | int j; |
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| 4 | int bar(); |
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| 5 | int test1() { |
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| 6 | for (int i = 0; |
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| 7 | i != 10; |
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| 8 | ++i) { // expected-warning {{loop will run at most once (loop increment never executed)}} |
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| 9 | if (j == 23) // missing {}'s |
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| 10 | bar(); |
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| 11 | return 1; |
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| 12 | } |
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| 13 | return 0; |
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| 14 | return 1; // expected-warning {{will never be executed}} |
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| 15 | } |
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| 16 | |
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| 17 | int test1_B() { |
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| 18 | for (int i = 0; |
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| 19 | i != 10; |
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| 20 | ++i) { // expected-warning {{loop will run at most once (loop increment never executed)}} |
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| 21 | if (j == 23) // missing {}'s |
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| 22 | bar(); |
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| 23 | return 1; |
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| 24 | } |
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| 25 | return 0; |
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| 26 | return bar(); // expected-warning {{will never be executed}} |
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| 27 | } |
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| 28 | |
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| 29 | void test2(int i) { |
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| 30 | switch (i) { |
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| 31 | case 0: |
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| 32 | break; |
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| 33 | bar(); // expected-warning {{will never be executed}} |
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| 34 | case 2: |
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| 35 | switch (i) { |
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| 36 | default: |
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| 37 | a: goto a; |
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| 38 | } |
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| 39 | bar(); // expected-warning {{will never be executed}} |
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| 40 | } |
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| 41 | b: goto b; |
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| 42 | bar(); // expected-warning {{will never be executed}} |
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| 43 | } |
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| 44 | |
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| 45 | void test3() { |
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| 46 | ^{ return; |
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| 47 | bar(); // expected-warning {{will never be executed}} |
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| 48 | }(); |
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| 49 | while (++j) { |
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| 50 | continue; |
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| 51 | bar(); // expected-warning {{will never be executed}} |
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| 52 | } |
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| 53 | } |
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| 54 | |
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| 55 | // PR 6130 - Don't warn about bogus unreachable code with throw's and |
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| 56 | // temporary objects. |
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| 57 | class PR6130 { |
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| 58 | public: |
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| 59 | PR6130(); |
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| 60 | ~PR6130(); |
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| 61 | }; |
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| 62 | |
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| 63 | int pr6130(unsigned i) { |
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| 64 | switch(i) { |
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| 65 | case 0: return 1; |
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| 66 | case 1: return 2; |
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| 67 | default: |
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| 68 | throw PR6130(); // no-warning |
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| 69 | } |
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| 70 | } |
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| 71 | |
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