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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - When assembling, report multiple potential instructions with missing features."
href="http://llvm.org/bugs/show_bug.cgi?id=21066">21066</a>
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<th>Summary</th>
<td>When assembling, report multiple potential instructions with missing features.
</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>All
</td>
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<th>OS</th>
<td>All
</td>
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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
</td>
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<th>Component</th>
<td>LLVM assembly language parser
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>oliver.stannard@arm.com
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</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>When the LLVM assembler does not find a matching instruction, but does find
instructions which would match if more target features were available, it
attempts to report the missing features. However, if there are multiple such
instructions, it currently only reports the one with the fewest missing
features, which is often not the most useful one.
For example, assembling "adds r0, #0x100" for Thumb1 will result in an error
message claiming that the "arm-mode" feature is required, but there is also a
version of the instruction which is available for Thumb2. In this case, it
would be better to report both of these potential matches.</pre>
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</p>
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