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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Wrong value for array element in the debugger (with -O1)"
href="https://bugs.llvm.org/show_bug.cgi?id=39869">39869</a>
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<th>Summary</th>
<td>Wrong value for array element in the debugger (with -O1)
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>DebugInfo
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>davide@freebsd.org
</td>
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<th>CC</th>
<td>jdevlieghere@apple.com, keith.walker@arm.com, llvm-bugs@lists.llvm.org, paul_robinson@playstation.sony.com
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<p>
<div>
<pre>$ cat a.c
short a, c;
long b;
short fun1() { return c; }
char d() {
short l_30[4] = {1};
a = fun1();
l_30[3]++;
return b; // break here
}
int main() { d(); }
Process 24627 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x0000000100000f93 a.out`d at a.c:8:10 [opt]
5 short l_30[4] = {1};
6 a = fun1();
7 l_30[3]++;
-> 8 return b;
9 }
10 int main() { d(); }
(lldb) frame var l_30
(short [4]) l_30 = ([0] = 0, [1] = 0, [2] = 0, [3] = 1)
The first element should be 1, i.e. the array should look like:
(short [4]) l_30 = ([0] = 1, [1] = 0, [2] = 0, [3] = 1)</pre>
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