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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - .arch/.cpu without extra features is ignored"
href="https://bugs.llvm.org/show_bug.cgi?id=32873">32873</a>
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<th>Summary</th>
<td>.arch/.cpu without extra features is ignored
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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
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: AArch64
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>ahmed.bougacha@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>According to
<a href="https://sourceware.org/binutils/docs/as/AArch64-Directives.html#AArch64-Directives">https://sourceware.org/binutils/docs/as/AArch64-Directives.html#AArch64-Directives</a>
"Specifying .arch clears any previously selected architecture extensions."
And yet, this is accepted:
.arch v8.2a+ras
.arch v8
esb
But this is rejected:
.arch v8.2a+ras
.arch v8+noras
esb
with:
error: instruction requires: ras
Even though they look semantically identical to me.
The logic in parseDirectiveCpu/parseDirectiveArch only ever calls
setAvailableFeatures if there was an extra "+feature" specified.
Should it also do it unconditionally on the default arch/cpu features?</pre>
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