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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ARM] inefficient negation of bool"
href="https://llvm.org/bugs/show_bug.cgi?id=30660">30660</a>
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<th>Summary</th>
<td>[ARM] inefficient negation of bool
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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
</td>
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<th>Status</th>
<td>NEW
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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: ARM
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>spatel+llvm@rotateright.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>$ cat negate-i1.ll
define i32 @select_neg1_or_0(i1 %a) {
%b = sext i1 %a to i32
ret i32 %b
}
$ ./llc -o - negate-i1.ll -mtriple=arm
lsl r0, r0, #31
asr r0, r0, #31
mov pc, lr
Should this be neg/rsb?</pre>
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