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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 - Segmentation fault on "CallGraph Pass Manager" when attributor-cgscc pass is used"
href="https://bugs.llvm.org/show_bug.cgi?id=49570">49570</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Segmentation fault on "CallGraph Pass Manager" when attributor-cgscc pass is used
</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>Interprocedural 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=24635" name="attach_24635" title="small.bc">attachment 24635</a> <a href="attachment.cgi?id=24635&action=edit" title="small.bc">[details]</a></span>
small.bc
$clang -v
clang version 13.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
77394c12a48822bb7a9183408f922d90c1d563cd)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
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/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Candidate multilib: .;@m64
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
-o small.bc
$opt -sroa -attributor-cgscc small.bc -o small-opt.bc
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt -sroa
-attributor-cgscc small.bc -o small-opt.bc
1. Running pass 'CallGraph Pass Manager' on module 'small.bc'.
#0 0x000055d7d665a5ec llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x2e865ec)
#1 0x000055d7d66582b4 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x2e842b4)
#2 0x000055d7d6658423 SignalHandler(int) Signals.cpp:0:0
#3 0x00007ff76f45d8a0 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x128a0)
#4 0x000055d7d42256ad llvm::scc_iterator<llvm::CallGraph*,
llvm::GraphTraits<llvm::CallGraph*> >::DFSVisitOne(llvm::CallGraphNode*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0xa516ad)
#5 0x000055d7d4225fb8 llvm::scc_iterator<llvm::CallGraph*,
llvm::GraphTraits<llvm::CallGraph*> >::DFSVisitChildren()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0xa51fb8)
#6 0x000055d7d4226148 llvm::scc_iterator<llvm::CallGraph*,
llvm::GraphTraits<llvm::CallGraph*> >::GetNextSCC()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0xa52148)
#7 0x000055d7d553f5f9 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&) CallGraphSCCPass.cpp:0:0
#8 0x000055d7d5e09196 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x2635196)
#9 0x000055d7d414ac0d main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x976c0d)
#10 0x00007ff76e0a7b97 __libc_start_main
/build/glibc-2ORdQG/glibc-2.27/csu/../csu/libc-start.c:344:0
#11 0x000055d7d4213eaa _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0xa3feaa)
Segmentation fault (core dumped)
The source code of small.c is as follows.
--------------------------------------------------------
long a;
char c;
static char(fn1)(b) {}
static long(d)() { return a; }
int e, f;
void g() {
long h;
int i = 5;
c = 0;
h = d();
f = fn1(h != e == i);
}</pre>
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