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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - target-features function attribute does not apply in 32-bit x86 target"
href="http://llvm.org/bugs/show_bug.cgi?id=22081">22081</a>
</td>
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<th>Summary</th>
<td>target-features function attribute does not apply in 32-bit x86 target
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sanxiyn@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>r225079.
Using target-features function attribute +sse2 does not cause 32-bit x86 code
generator to use SSE. Using command line flag -mattr=+sse2 does.
$ cat test.ll
define double @inv(double %x) #0 {
entry:
%div = fdiv double 1.0, %x
ret double %div
}
attributes #0 = { "target-features"="+sse2" }
$ llc test.ll -o -
inv:
fld1
fdivl 4(%esp)
retl
$ llc -mattr=+sse2 test.ll -o -
inv:
subl $12, %esp
movsd .LCPI0_0, %xmm0
divsd 16(%esp), %xmm0
movsd %xmm0, (%esp)
fldl (%esp)
addl $12, %esp
retl</pre>
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