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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 - opt crashes with "opt -early-cse -indvars -sroa -lowerswitch -loop-unswitch -licm -loop-extract-single -inline""
href="https://bugs.llvm.org/show_bug.cgi?id=42016">42016</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>opt crashes with "opt -early-cse -indvars -sroa -lowerswitch -loop-unswitch -licm -loop-extract-single -inline"
</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=22017" name="attach_22017" title=".bc file of the source code">attachment 22017</a> <a href="attachment.cgi?id=22017&action=edit" title=".bc file of the source code">[details]</a></span>
.bc file of the source code
$clang -v
clang version 9.0.0 (trunk 355281)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/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
$clang -O3 -c -emit-llvm -mllvm -disable-llvm-optzns small.c
$opt -early-cse -indvars -sroa -lowerswitch -loop-unswitch -licm
-loop-extract-single -inline small.bc -o small-opt.bc
Instruction does not dominate all uses!
<badref> = alloca [5 x i64], *** stack smashing detected ***: <unknown>
terminated
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt -early-cse
-indvars -sroa -lowerswitch -loop-unswitch -licm -loop-extract-single -inline
small.bc -o small-opt.bc
1. Running pass 'CallGraph Pass Manager' on module 'small.bc'.
2. Running pass 'Module Verifier' on function '@fn1'
#0 0x000055b2535e3d2a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d9d2a)
#1 0x000055b2535e1d04 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7d04)
#2 0x000055b2535e1e42 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7e42)
#3 0x00007f974ba5b890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f974a70de97 gsignal
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f974a70f801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f974a758897 __libc_message
/build/glibc-OTsEL5/glibc-2.27/libio/../sysdeps/posix/libc_fatal.c:181:0
#7 0x00007f974a803cd1 __GI___fortify_fail_abort
/build/glibc-OTsEL5/glibc-2.27/debug/fortify_fail.c:33:0
#8 0x00007f974a803c92 (/lib/x86_64-linux-gnu/libc.so.6+0x134c92)
#9 0x000055b252ec8948
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19be948)
#10 0x000055b252ecd071 (anonymous
namespace)::AssemblyWriter::writeOperand(llvm::Value const*, bool)
(.constprop.1019)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19c3071)
#11 0x000055b252ed258f (anonymous
namespace)::AssemblyWriter::printInstruction(llvm::Instruction const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19c858f)
#12 0x000055b252ed5991 llvm::Value::print(llvm::raw_ostream&,
llvm::ModuleSlotTracker&, bool) const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19cb991)
#13 0x000055b252ff587b llvm::VerifierSupport::Write(llvm::Value const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1aeb87b)
#14 0x000055b2530076ca (anonymous
namespace)::Verifier::visitInstruction(llvm::Instruction&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1afd6ca)
#15 0x000055b25300f1a6 (anonymous namespace)::Verifier::verify(llvm::Function
const&) (.part.1280)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1b051a6)
#16 0x000055b253012355 (anonymous
namespace)::VerifierLegacyPass::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1b08355)
#17 0x000055b252f9d7a9 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a937a9)
#18 0x000055b25294a570 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1440570)
#19 0x000055b252f9cb59 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a92b59)
#20 0x000055b251b3a153 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x630153)
#21 0x00007f974a6f0b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#22 0x000055b251bcef6a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x6c4f6a)
Aborted (core dumped)
-----------------------------------------
struct a {
signed e;
} c;
int b, d;
int *fn1(signed char f, struct a p) {
int g=0;
l:
for (; f;) {
int i=0;
for (; 0; 0)
;
if (p.e)
break;
for (; 0; 1) {
long int h[5];
for (; 5; g++)
h[g] = d;
}
}
{
int k=0;
if (b)
goto l;
}
}</pre>
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