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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - MIPS integrated assembler incorrectly warns for t4-t7 usage" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D24094&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=tpiHgVhusue9V--i8oe7jCrnPGhBe2y2T5lrdLI4TkM&s=usKQi7zMzFhmVCNU3J3HkQvsnQlX0TN2h-offg1IqYw&e=">24094</a>
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<th>Summary</th>
<td>MIPS integrated assembler incorrectly warns for t4-t7 usage
</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>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: MIPS
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>csdavec@swan.ac.uk
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The N32 ABI (and Wikipedia and the implementation in GCC) name registers
$12-$15 $t4-$t7. GCC, as an extension, allows $8-$11 to be referred to as
$t0-$t3 in all modes and as $a4-$17 in N modes.
Recent LLVM has introduced a regression, warning if $t4-$t7 are used and
suggesting that they be replaced with $t0-$t3. This warning is the exact
inverse of a useful warning (suggesting that $t0-$t3 be replaced with $t4-$t7).</pre>
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