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<body><span class="vcard"><a class="email" href="mailto:ehudkatz@gmail.com" title="Ehud Katz <ehudkatz@gmail.com>"> <span class="fn">Ehud Katz</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Reverse loop order with variable upper boundary not handled correctly by analyzer"
href="https://bugs.llvm.org/show_bug.cgi?id=12531">bug 12531</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>ehudkatz@gmail.com
</td>
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<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Reverse loop order with variable upper boundary not handled correctly by analyzer"
href="https://bugs.llvm.org/show_bug.cgi?id=12531#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Reverse loop order with variable upper boundary not handled correctly by analyzer"
href="https://bugs.llvm.org/show_bug.cgi?id=12531">bug 12531</a>
from <span class="vcard"><a class="email" href="mailto:ehudkatz@gmail.com" title="Ehud Katz <ehudkatz@gmail.com>"> <span class="fn">Ehud Katz</span></a>
</span></b>
<pre>(In reply to Jörg Sonnenberger from <a href="show_bug.cgi?id=12531#c0">comment #0</a>)
<span class="quote">> Consider this code:
>
> void f(int j)
> {
> void *buf[j];
> int i;
> if (j < 0)
> return;
> for (i = 0; i < j; ++i)
> buf[i] = malloc(100);
> #if WORKING
> for (i = 0; i < j; ++i)
> #else
> for (i = j - 1; i >= 0; ++i)
> #endif
> free(buf[i]);
> }
>
> The two for loops in the #if are equivalent, but the second triggers the
> "use of potentially uninitialised memory" check.</span >
Those loops are not equivalent. The analyzer is correct.
The second loop should have `--i` instead of `++i`.</pre>
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