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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - using optimizations yields different output"
href="https://bugs.llvm.org/show_bug.cgi?id=40402">40402</a>
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<th>Summary</th>
<td>using optimizations yields different output
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>7.0
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>release blocker
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>LLVM Codegen
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>dvoreader@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21364" name="attach_21364" title="test case">attachment 21364</a> <a href="attachment.cgi?id=21364&action=edit" title="test case">[details]</a></span>
test case
I wrote a simple encryption algorithm as home project on my android device
above termux.
In the main function I used it to encrypt and decrypt a message.
When I used -O0 It printed the original message, but with -O2, it gave me
totally different output.
clang version :
<span class="quote">>>> clang -v</span >
clang version 7.0.0 (tags/RELEASE_700/final)
Target: arm--linux-android
Thread model: posix</pre>
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