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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash while building compiler-rt/lib/builtins/atomic.c"
href="https://bugs.llvm.org/show_bug.cgi?id=34020">34020</a>
</td>
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<tr>
<th>Summary</th>
<td>Crash while building compiler-rt/lib/builtins/atomic.c
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>5.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>release blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>Catherine_Moore@mentor.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=18886" name="attach_18886" title="Preprocesed source">attachment 18886</a> <a href="attachment.cgi?id=18886&action=edit" title="Preprocesed source">[details]</a></span>
Preprocesed source
This file compiled successfully with LLVM 4.0, but now crashes when compiled
with 5.0 and trunk. The errors reported are:
fatal error: error in backend: Cannot select: t7: i32,ch = AtomicSwap<Volatile
LDST4[%21]> t4:1, t6, t4
t6: i32,ch = CopyFromReg t0, Register:i32 %vreg1
t5: i32 = Register %vreg1
t4: i32,ch = load<LD4[%.atomictmp2](dereferenceable)> t0, FrameIndex:i32<7>,
undef:i32
t1: i32 = FrameIndex<7>
t3: i32 = undef
In function: __atomic_exchange_c
clang-6.0: error: clang frontend command failed with exit code 70 (use -v to
see invocation)
clang version 6.0.0 (trunk) (llvm/trunk 309605)
Target: arm-none--eabi
Thread model: single
InstalledDir: /scratch/cmoore/virgin-llvm-upstream-trunk/install-stage2/bin
clang-6.0: note: diagnostic msg: PLEASE submit a bug report to
<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed s
ource, and associated run script.
clang-6.0: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-6.0: note: diagnostic msg: /tmp/atomic-d9e982.c
clang-6.0: note: diagnostic msg: /tmp/atomic-d9e982.sh
clang-6.0: note: diagnostic msg:</pre>
</div>
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