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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - (llvm 3.3) SHLX64rm assertion in JIT codegen"
href="http://llvm.org/bugs/show_bug.cgi?id=17422">17422</a>
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<th>Summary</th>
<td>(llvm 3.3) SHLX64rm assertion in JIT codegen
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>unspecified
</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>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>vtjnash@gmail.com
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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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</tr></table>
<p>
<div>
<pre>On the Haswell platform, it seems the SHLX64rm instruction causes an assertion
failure in the JIT. Unfortunately, I have not been able to make a reduced test
case.
Unknown immediate size
UNREACHABLE executed at
/home/jameson/julia/deps/llvm-3.3/lib/Target/X86/MCTargetDesc/X86BaseInfo.h:497!
%RSI<def> = SHLX64rm %RBP, 1, %noreg, -120, %noreg, %RAX<kill>;
mem:LD8[FixedStack3]
In gdb, I see that TSFlags&X86II::ImmMask = 0, so I guess this means it is
missing some metadata from somewhere?
I'm not sure where to go from here, other than disabling the Haswell
instruction set.
(on a side note, llvm 3.3 seems to be missing from the bug version target list)</pre>
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