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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Compilation hang at -O2"
href="https://bugs.llvm.org/show_bug.cgi?id=43571">43571</a>
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<th>Summary</th>
<td>Compilation hang at -O2
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Global Analyses
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>paulsson@linux.vnet.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22630" name="attach_22630" title="unreduced test case">attachment 22630</a> <a href="attachment.cgi?id=22630&action=edit" title="unreduced test case">[details]</a></span>
unreduced test case
time at -O1 is <1s, but at -O3 it's been nearly 10hrs.
clang -cc1 -triple s390x-ibm-linux -S -save-temps=cwd -disable-free
-mrelocation-model static -mthread-model posix -mframe-pointer=none
-fmath-errno -masm-verbose -mconstructor-aliases -fuse-init-array -target-cpu
z10 -dwarf-column-info -debugger-tuning=gdb -v -O3 -w -ferror-limit 19
-fmessage-length 0 -fno-signed-char -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp
-faddrsig -o tc_opthang.s -x ir tc_opthang.bc</pre>
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