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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 -gvn -correlated-propagation -indvars": Assertion `!L || L->contains(LI->getLoopFor(InsertPt->getParent()))' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=40422">40422</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>opt crashes with "opt -gvn -correlated-propagation -indvars": Assertion `!L || L->contains(LI->getLoopFor(InsertPt->getParent()))' failed.
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>6.0
</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>$ clang -v
clang version 6.0.0 (tags/RELEASE_600/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/jack-zhou/clang+llvm-6.0.0-x86_64-linux-gnu-ubuntu-16.04/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/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
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 -o small.bc
-I"path to csmith's runtime"
$ opt -gvn -correlated-propagation -indvars small.bc -o small-opt.bc
LLVMSymbolizer: error reading file: No such file or directory
#0 0x0000000001a68794 (opt+0x1a68794)
#1 0x0000000001a68a76 (opt+0x1a68a76)
#2 0x00007f31530a0890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#3 0x0000000001639070 (opt+0x1639070)
#4 0x000000000076ec64 (opt+0x76ec64)
#5 0x00000000018b0a40 (opt+0x18b0a40)
#6 0x00000000018b6b83 (opt+0x18b6b83)
#7 0x00000000011c0618 (opt+0x11c0618)
#8 0x00000000016021eb (opt+0x16021eb)
#9 0x0000000001602453 (opt+0x1602453)
#10 0x0000000001602858 (opt+0x1602858)
#11 0x000000000075b292 (opt+0x75b292)
#12 0x00007f3151f73b97 __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b97)
#13 0x000000000074c1b9 (opt+0x74c1b9)
Stack dump:
0. Program arguments: opt -gvn -correlated-propagation -indvars small.bc
-o small-opt.bc
1. Running pass 'Function Pass Manager' on module 'crash18.bc'.
2. Running pass 'Loop Pass Manager' on function '@c'
3. Running pass 'Induction Variable Simplification' on basic block '%19'
Segmentation fault (core dumped)
The following is the source code of small.c, which is generated by csmith and
reduced by creduce.
#include "csmith.h"
a;
b[][1];
static const int64_t c(int32_t, d, const *, *, uint8_t);
e() { f(c); }
const int64_t c(int32_t g, d, const *h, *i, uint8_t l) {
uint32_t j;
for (j = 0; j; j++) {
int32_t k;
if (b[0][0]) {
uint32_t n;
if (b[j + 1])
return d;
} else {
int32_t m;
for (; 3;)
return a;
}
b[j + 1];
}
}</pre>
</div>
</p>
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