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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - illegal instruction generated"
href="http://llvm.org/bugs/show_bug.cgi?id=21301">21301</a>
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<th>Summary</th>
<td>illegal instruction generated
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>Linux
</td>
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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
</td>
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<th>Component</th>
<td>LLVM Codegen
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>nathanael.schaeffer@gmail.com
</td>
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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 compiled with -march=native, clang 3.5 generates instruction "pextrb"
which is part of sse4.1, while my cpu does not support this instruction set.
Running the executable leads to:
Program received signal SIGILL, Illegal instruction.
Here are selected lines from /proc/cpuinfo :
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 37
model name : Intel(R) Pentium(R) CPU U5400 @ 1.20GHz
stepping : 5
microcode : 0x2
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rd
tscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm pcid p
opcnt lahf_lm arat dtherm
Regards,
Nathanael</pre>
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