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<head>
<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 -gvn -jump-threading -indvars" while running pass 'Induction Variable Simplification'"
href="https://bugs.llvm.org/show_bug.cgi?id=37827">37827</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>opt crashes with "opt -gvn -jump-threading -indvars" while running pass 'Induction Variable Simplification'
</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>All
</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>su@cs.ucdavis.edu
</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=20436" name="attach_20436" title="crash triggering LLVM IR">attachment 20436</a> <a href="attachment.cgi?id=20436&action=edit" title="crash triggering LLVM IR">[details]</a></span>
crash triggering LLVM IR
Tested with trunk revision 334906.
$ clangpolly -v
clang version 7.0.0 (<a href="http://llvm.org/git/clang.git">http://llvm.org/git/clang.git</a>
c36069cffc57a30a20782bf327a87bed4e48a6c2) (<a href="http://llvm.org/git/llvm.git">http://llvm.org/git/llvm.git</a>
59cb663e72874dda740aa2b18bf47ba65b32fe9b)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/su/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.4.0
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/6.0.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.4
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/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.0.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$
$ clangpolly -O0 -w small.c; ./a.out
$
$ clangpolly -O3 -mllvm -disable-llvm-optzns -w -c -emit-llvm -o small.bc
small.c
$ optpolly -gvn -jump-threading -indvars -o small-opt.bc small.bc
Stack dump:
0. Program arguments: optpolly -gvn -jump-threading -indvars -o
small-opt.bc small.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Loop Pass Manager' on function '@f'
3. Running pass 'Induction Variable Simplification' on basic block
'%for.cond'
LLVMSymbolizer: error reading file: No such file or directory
#0 0x00000000020eebca (optpolly+0x20eebca)
#1 0x00000000020ed1cc (optpolly+0x20ed1cc)
#2 0x00000000020ed337 (optpolly+0x20ed337)
#3 0x00007f40d95cc390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#4 0x0000000001ac26b4 (optpolly+0x1ac26b4)
#5 0x0000000001ef7824 (optpolly+0x1ef7824)
#6 0x0000000001ef7aa3 (optpolly+0x1ef7aa3)
#7 0x0000000001ef88dd (optpolly+0x1ef88dd)
#8 0x0000000001efbc43 (optpolly+0x1efbc43)
#9 0x0000000001efd615 (optpolly+0x1efd615)
#10 0x0000000001eff9b1 (optpolly+0x1eff9b1)
#11 0x0000000001635c4f (optpolly+0x1635c4f)
#12 0x0000000001b93493 (optpolly+0x1b93493)
#13 0x0000000001b9356c (optpolly+0x1b9356c)
#14 0x0000000001b9303d (optpolly+0x1b9303d)
#15 0x00000000007bfca8 (optpolly+0x7bfca8)
#16 0x00007f40d8329830 __libc_start_main
/build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:325:0
#17 0x000000000084fd89 (optpolly+0x84fd89)
Segmentation fault (core dumped)
$
--------------------------------
int a, b[3], c, d;
void f ()
{
for (; d < 1; d++)
{
b[d + 2];
for (c = 0; c == 1; c++)
while (a)
(d || 0, d + 2);
}
}
int main ()
{
f ();
return 0;
}</pre>
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