| 1 | // XFAIL: * |
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| 2 | // Incorrect location for variable "parama", see PR48719. |
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| 3 | |
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| 4 | // REQUIRES: lldb |
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| 5 | // UNSUPPORTED: system-windows |
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| 6 | // RUN: %clang -std=gnu11 -O3 -glldb %s -o %t |
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| 7 | // RUN: %dexter --fail-lt 1.0 -w --debugger lldb --binary %t -- %s |
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| 8 | |
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| 9 | // 1. parama is escaped by esc(¶ma) so it is not promoted by |
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| 10 | // SROA/mem2reg. |
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| 11 | // 2. InstCombine's LowerDbgDeclare converts the dbg.declare to a set of |
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| 12 | // dbg.values (tracking the stored SSA values). |
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| 13 | // 3. InstCombine replaces the two stores to parama's alloca (the initial |
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| 14 | // parameter register store in entry and the assignment in if.then) with a |
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| 15 | // PHI+store in the common sucessor. |
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| 16 | // 4. SimplifyCFG folds the blocks together and converts the PHI to a |
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| 17 | // select. |
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| 18 | |
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| 19 | // The debug info is not updated to account for the merged value in the |
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| 20 | // sucessor prior to SimplifyCFG when it exists as a PHI, or during when it |
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| 21 | // becomes a select. As a result we see parama=5 for the entire function, when |
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| 22 | // we'd expect to see param=20 when stepping onto fluff(). |
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| 23 | |
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| 24 | __attribute__((optnone)) |
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| 25 | void esc(int* p) {} |
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| 26 | |
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| 27 | __attribute__((optnone)) |
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| 28 | void fluff() {} |
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| 29 | |
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| 30 | __attribute__((noinline)) |
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| 31 | int fun(int parama, int paramb) { |
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| 32 | if (parama) |
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| 33 | parama = paramb; |
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| 34 | fluff(); // DexLabel('s0') |
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| 35 | esc(p: ¶ma); |
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| 36 | return 0; |
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| 37 | } |
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| 38 | |
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| 39 | int main() { |
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| 40 | return fun(parama: 5, paramb: 20); |
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| 41 | } |
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| 42 | |
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| 43 | // DexExpectWatchValue('parama', 20, on_line=ref('s0')) |
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| 44 | |
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