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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 - loop-unroll crashes: Assertion `OuterL->isLCSSAForm(*DT) && "Loops should be in LCSSA form after loop-unroll."' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=43458">43458</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>loop-unroll crashes: Assertion `OuterL->isLCSSAForm(*DT) && "Loops should be in LCSSA form after loop-unroll."' failed.
</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>Scalar Optimizations
</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=22573" name="attach_22573" title="bugpoint-reduced-simplified.bc">attachment 22573</a> <a href="attachment.cgi?id=22573&action=edit" title="bugpoint-reduced-simplified.bc">[details]</a></span>
bugpoint-reduced-simplified.bc
$clang -v
clang version 10.0.0 (trunk 372856)
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 bugpoint-reduced-simplified.bc -loop-reduce -loop-unroll
WARNING: You're attempting to print out a bitcode file.
This is inadvisable as it may cause display problems. If
you REALLY want to taste LLVM bitcode first-hand, you
can force output with the `-f' option.
opt:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/Transforms/Utils/LoopUnroll.cpp:942:
llvm::LoopUnrollResult llvm::UnrollLoop(llvm::Loop*, llvm::UnrollLoopOptions,
llvm::LoopInfo*, llvm::ScalarEvolution*, llvm::DominatorTree*,
llvm::AssumptionCache*, llvm::OptimizationRemarkEmitter*, bool, llvm::Loop**):
Assertion `OuterL->isLCSSAForm(*DT) && "Loops should be in LCSSA form after
loop-unroll."' failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt
bugpoint-reduced-simplified.bc -loop-reduce -loop-unroll
1. Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.bc'.
2. Running pass 'Loop Pass Manager' on function '@jpeg_make_c_derived_tbl'
3. Running pass 'Unroll loops' on basic block '%.lr.ph27'
#0 0x000055d08271005a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x278405a)
#1 0x000055d08270dd34 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2781d34)
#2 0x000055d08270de72 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2781e72)
#3 0x00007f1974dbb890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f1973a6de97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f1973a6f801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f1973a5f39a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007f1973a5f412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x000055d0827b145f llvm::UnrollLoop(llvm::Loop*, llvm::UnrollLoopOptions,
llvm::LoopInfo*, llvm::ScalarEvolution*, llvm::DominatorTree*,
llvm::AssumptionCache*, llvm::OptimizationRemarkEmitter*, bool, llvm::Loop**)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x282545f)
#9 0x000055d082554492 tryToUnrollLoop(llvm::Loop*, llvm::DominatorTree&,
llvm::LoopInfo*, llvm::ScalarEvolution&, llvm::TargetTransformInfo const&,
llvm::AssumptionCache&, llvm::OptimizationRemarkEmitter&,
llvm::BlockFrequencyInfo*, llvm::ProfileSummaryInfo*, bool, int, bool, bool,
llvm::Optional<unsigned int>, llvm::Optional<unsigned int>,
llvm::Optional<bool>, llvm::Optional<bool>, llvm::Optional<bool>,
llvm::Optional<bool>, llvm::Optional<bool>, llvm::Optional<unsigned int>)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x25c8492)
#10 0x000055d082554971 (anonymous
namespace)::LoopUnroll::runOnLoop(llvm::Loop*, llvm::LPPassManager&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x25c8971)
#11 0x000055d0819dfe7b llvm::LPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x1a53e7b)
#12 0x000055d08204e9a9 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c29a9)
#13 0x000055d08204eaa1 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c2aa1)
#14 0x000055d08204dc01 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20c1c01)
#15 0x000055d08081d94f main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x89194f)
#16 0x00007f1973a50b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#17 0x000055d080895a7a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x909a7a)
Aborted (core dumped)</pre>
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