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<base href="https://bugs.llvm.org/">
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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 - llc crashes with Segmentation fault at all optimization levels caused by "Peephole Optimizations""
href="https://bugs.llvm.org/show_bug.cgi?id=43635">43635</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>llc crashes with Segmentation fault at all optimization levels caused by "Peephole Optimizations"
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>cszide@163.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=22646" name="attach_22646" title="VOLREND.bc">attachment 22646</a> <a href="attachment.cgi?id=22646&action=edit" title="VOLREND.bc">[details]</a></span>
VOLREND.bc
$clang -v
clang version 10.0.0 (trunk 373844)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$opt -loop-vectorize -sroa -simplifycfg -reg2mem -gvn-hoist -instcombine -sroa
VOLREND.bc -o VOLREND-opt.bc
In the following step, llc will crash with/without optimization levels
(-O1/2/3).
$llc VOLREND-opt.bc
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc VOLREND-opt.bc
1. Running pass 'Function Pass Manager' on module 'VOLREND-opt.bc'.
2. Running pass 'Peephole Optimizations' on function '@Trace_Ray'
#0 0x0000558b68f7a6ca llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x26e66ca)
#1 0x0000558b68f783a4 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x26e43a4)
#2 0x0000558b68f784e2 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x26e44e2)
#3 0x00007ff50dc67890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007ff50c96f30e _int_malloc
/build/glibc-OTsEL5/glibc-2.27/malloc/malloc.c:3557:0
#5 0x00007ff50c9720fc malloc
/build/glibc-OTsEL5/glibc-2.27/malloc/malloc.c:3058:0
#6 0x0000558b68f1b868 llvm::SmallVectorBase::grow_pod(void*, unsigned long,
unsigned long)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x2687868)
#7 0x0000558b685fb7e3
llvm::SmallVectorImpl<llvm::TargetInstrInfo::RegSubRegPair>::operator=(llvm::SmallVectorImpl<llvm::TargetInstrInfo::RegSubRegPair>
const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x1d677e3)
#8 0x0000558b685fba45 getNewSource(llvm::MachineRegisterInfo*,
llvm::TargetInstrInfo const*, llvm::TargetInstrInfo::RegSubRegPair,
llvm::SmallDenseMap<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult, 4u,
llvm::DenseMapInfo<llvm::TargetInstrInfo::RegSubRegPair>,
llvm::detail::DenseMapPair<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult> > const&, bool)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x1d67a45)
#9 0x0000558b685fbaf8 getNewSource(llvm::MachineRegisterInfo*,
llvm::TargetInstrInfo const*, llvm::TargetInstrInfo::RegSubRegPair,
llvm::SmallDenseMap<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult, 4u,
llvm::DenseMapInfo<llvm::TargetInstrInfo::RegSubRegPair>,
llvm::detail::DenseMapPair<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult> > const&, bool)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x1d67af8)
#10 0x0000558b685fbaf8 getNewSource(llvm::MachineRegisterInfo*,
llvm::TargetInstrInfo const*, llvm::TargetInstrInfo::RegSubRegPair,
llvm::SmallDenseMap<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult, 4u,
llvm::DenseMapInfo<llvm::TargetInstrInfo::RegSubRegPair>,
llvm::detail::DenseMapPair<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult> > const&, bool)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x1d67af8)
...
...
...
#255 0x0000558b685fbaf8 getNewSource(llvm::MachineRegisterInfo*,
llvm::TargetInstrInfo const*, llvm::TargetInstrInfo::RegSubRegPair,
llvm::SmallDenseMap<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult, 4u,
llvm::DenseMapInfo<llvm::TargetInstrInfo::RegSubRegPair>,
llvm::detail::DenseMapPair<llvm::TargetInstrInfo::RegSubRegPair, (anonymous
namespace)::ValueTrackerResult> > const&, bool)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/llc+0x1d67af8)</pre>
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