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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Assertion failure when compiling a non-trivial combination of simple operations on i193 integers"
href="http://llvm.org/bugs/show_bug.cgi?id=20921">20921</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion failure when compiling a non-trivial combination of simple operations on i193 integers
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</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>jaak.randmets@cyber.ee
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13028" name="attach_13028" title="The LLVM code that crashes llc.">attachment 13028</a> <a href="attachment.cgi?id=13028&action=edit" title="The LLVM code that crashes llc.">[details]</a></span>
The LLVM code that crashes llc.
To reproduce the issue compile the attached file with "llc -O1 Bug.ll".
The assert does not happen when compiling with "-O0" or when using 192
bit-integers. Even slight modifications to the attached code tend to result in
the crash disappearing. As such I haven't managed to simplify the code any
further.
LLVM is from SVN trunk 217588. x86_64 target.
The stack trace follows:
llc:
/home/jaak/usr/src/llvm.svn/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp:1703:
virtual void (anonymous namespace)::RegReductionPQBase::remove(llvm::SUnit *):
Assertion `!Queue.empty() && "Queue is empty!"' failed.
0 libLLVM-3.6svn.so 0x00007fa7f8c7e1c5 llvm::sys::PrintStackTrace(_IO_FILE*) +
37
1 libLLVM-3.6svn.so 0x00007fa7f8c7ec5b
2 libpthread.so.0 0x00007fa7f84d2ed0
3 libc.so.6 0x00007fa7f72a4319 gsignal + 57
4 libc.so.6 0x00007fa7f72a5678 abort + 328
5 libc.so.6 0x00007fa7f729d486
6 libc.so.6 0x00007fa7f729d532
7 libLLVM-3.6svn.so 0x00007fa7f8d9d663
8 libLLVM-3.6svn.so 0x00007fa7f8da4d75
9 libLLVM-3.6svn.so 0x00007fa7f8da2337
10 libLLVM-3.6svn.so 0x00007fa7f8e2c5e2
llvm::SelectionDAGISel::CodeGenAndEmitDAG() + 4178
11 libLLVM-3.6svn.so 0x00007fa7f8e2aaa9
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 8553
12 libLLVM-3.6svn.so 0x00007fa7f8e27974
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 1364
13 libLLVM-3.6svn.so 0x00007fa7f953a7a6
14 libLLVM-3.6svn.so 0x00007fa7f96d873c
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 124
15 libLLVM-3.6svn.so 0x00007fa7f934cebb
llvm::FPPassManager::runOnFunction(llvm::Function&) + 539
16 libLLVM-3.6svn.so 0x00007fa7f934d12b
llvm::FPPassManager::runOnModule(llvm::Module&) + 43
17 libLLVM-3.6svn.so 0x00007fa7f934d6a7
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 967
18 llc 0x000000000040ac91 main + 6193
19 libc.so.6 0x00007fa7f7290b25 __libc_start_main + 245
20 llc 0x0000000000407c01
Stack dump:
0. Program arguments: llc -O1 Bug.ll
1. Running pass 'Function Pass Manager' on module 'Bug.ll'.
2. Running pass 'X86 DAG->DAG Instruction Selection' on function '@func'
Aborted</pre>
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