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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - AsmLexer doesn't understand some escapes (notably '\r' and '\f')"
href="https://bugs.llvm.org/show_bug.cgi?id=48781">48781</a>
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<th>Summary</th>
<td>AsmLexer doesn't understand some escapes (notably '\r' and '\f')
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>MC
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>theferdi265@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>llvm-mc, or also the integrated assembler in clang (which uses the same
parser), doesn't understand the escapes '\r' and '\f'.
Reproducer: `llvm-mc <(echo ".byte '\\r'")`
Expected: `.text .byte 13`
Actual: `.text .byte 114`
After <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - asmparser cant grok '"
href="show_bug.cgi?id=8615">Bug 8615</a>, support was added for basic character escapes, but '\r' and
'\f' were seemlingly forgotten.
By adding those two escapes to llvm-mc, LLVM would achieve feature parity with
GNU as for character constants as described by the `info as` manual.
The relevant code block lives in `./llvm/lib/MC/MCParser/AsmLexer.cpp:566`.</pre>
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