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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 -early-cse-memssa -jump-threading -mem2reg": Assertion `!contains(New, this) && "this->replaceAllUsesWith(expr(this)) is NOT valid!"' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=37632">37632</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>opt crashes with "opt -early-cse-memssa -jump-threading -mem2reg": Assertion `!contains(New, this) && "this->replaceAllUsesWith(expr(this)) is NOT valid!"' 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>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>Tested with trunk revision 333424.
$ clangpolly -v
clang version 7.0.0 (<a href="http://llvm.org/git/clang.git">http://llvm.org/git/clang.git</a>
3de179a61e5c29a0f91918da87c692756bc755b4) (llvm/trunk 333424)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/su/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.4
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.3.0
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/4.7.3
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/4.9.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.2.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$
$ clangpolly -O3 -mllvm -disable-llvm-optzns -c -emit-llvm -o small.bc small.c
$
$ optpolly -early-cse-memssa -jump-threading -mem2reg -o small-opt.bc small.bc
optpolly: /home/su/software/tmp/polly/llvm/lib/IR/Value.cpp:411: void
llvm::Value::doRAUW(llvm::Value*, bool): Assertion `!contains(New, this) &&
"this->replaceAllUsesWith(expr(this)) is NOT valid!"' failed.
Stack dump:
0. Program arguments: optpolly -early-cse-memssa -jump-threading -mem2reg
-o small-opt.bc small.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Promote Memory to Register' on function '@main'
LLVMSymbolizer: error reading file: No such file or directory
#0 0x00000000021c43ea (optpolly+0x21c43ea)
#1 0x00000000021c28da (optpolly+0x21c28da)
#2 0x00000000021c2a09 (optpolly+0x21c2a09)
#3 0x00007f507f7ca330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007f507e5b2c37 gsignal
/build/eglibc-SvCtMH/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007f507e5b6028 abort
/build/eglibc-SvCtMH/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007f507e5abbf6 __assert_fail_base
/build/eglibc-SvCtMH/eglibc-2.19/assert/assert.c:92:0
#7 0x00007f507e5abca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x0000000001ce8c46 (optpolly+0x1ce8c46)
#9 0x0000000002284bc5 (optpolly+0x2284bc5)
#10 0x0000000002286217 (optpolly+0x2286217)
#11 0x00000000022717ff (optpolly+0x22717ff)
#12 0x0000000001ca1183 (optpolly+0x1ca1183)
#13 0x0000000001ca123c (optpolly+0x1ca123c)
#14 0x0000000001ca193a (optpolly+0x1ca193a)
#15 0x00000000008e776c (optpolly+0x8e776c)
#16 0x00007f507e59df45 __libc_start_main
/build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:321:0
#17 0x0000000000961226 (optpolly+0x961226)
Aborted (core dumped)
$
--------------------------------
int main ()
{
while (0)
for (int a = 0; a; a++)
a--;
return 0;
}</pre>
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