| 1 | // RUN: %clang_cc1 -emit-llvm -o - %s |
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| 2 | // <rdar://problem/6108358> |
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| 3 | |
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| 4 | /* For posterity, the issue here begins initial "char []" decl for |
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| 5 | * s. This is a tentative definition and so a global was being |
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| 6 | * emitted, however the mapping in GlobalDeclMap referred to a bitcast |
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| 7 | * of this global. |
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| 8 | * |
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| 9 | * The problem was that later when the correct definition for s is |
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| 10 | * emitted we were doing a RAUW on the old global which was destroying |
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| 11 | * the bitcast in the GlobalDeclMap (since it cannot be replaced |
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| 12 | * properly), leaving a dangling pointer. |
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| 13 | * |
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| 14 | * The purpose of bar is just to trigger a use of the old decl |
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| 15 | * sometime after the dangling pointer has been introduced. |
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| 16 | */ |
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| 17 | |
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| 18 | char s[]; |
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| 19 | |
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| 20 | static void bar(void *db) { |
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| 21 | eek(s); |
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| 22 | } |
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| 23 | |
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| 24 | char s[5] = "hi"; |
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| 25 | |
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| 26 | int foo() { |
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| 27 | bar(0); |
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| 28 | } |
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| 29 | |
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