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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 -inline -newgvn": Assertion `CC->getMemoryLeader() && "Every MemoryAccess should be mapped to a " "congruence class with a represenative memory " "access"' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=32934">32934</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>opt crashes with "opt -inline -newgvn": Assertion `CC->getMemoryLeader() && "Every MemoryAccess should be mapped to a " "congruence class with a represenative memory " "access"' 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>$ clang -v
clang version 5.0.0 (trunk 302200)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/clang-trunk/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
$
$ clang -O3 -mllvm -disable-llvm-optzns -S -emit-llvm -o small.bc small.c
$ opt -inline -newgvn -o small-opt.bc small.bc
opt: /tmp/llvm-builder/llvm-source-trunk/lib/Transforms/Scalar/NewGVN.cpp:1022:
const llvm::MemoryAccess* {anonymous}::NewGVN::lookupMemoryLeader(const
llvm::MemoryAccess*) const: Assertion `CC->getMemoryLeader() && "Every
MemoryAccess should be mapped to a " "congruence class with a represenative
memory " "access"' failed.
#0 0x0000000001ec265a (opt+0x1ec265a)
#1 0x0000000001ec077e (opt+0x1ec077e)
#2 0x0000000001ec08e0 (opt+0x1ec08e0)
#3 0x00007ffc0c566330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007ffc0b34fc37 gsignal
/build/eglibc-MjiXCM/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007ffc0b353028 abort
/build/eglibc-MjiXCM/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007ffc0b348bf6 __assert_fail_base
/build/eglibc-MjiXCM/eglibc-2.19/assert/assert.c:92:0
#7 0x00007ffc0b348ca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x0000000000830ea2 (opt+0x830ea2)
#9 0x0000000001d8e27e (opt+0x1d8e27e)
#10 0x0000000001da333b (opt+0x1da333b)
#11 0x0000000001da4a4d (opt+0x1da4a4d)
#12 0x0000000001da60d7 (opt+0x1da60d7)
#13 0x0000000001a0aaa3 (opt+0x1a0aaa3)
#14 0x00000000014a61c6 (opt+0x14a61c6)
#15 0x0000000001a0b38a (opt+0x1a0b38a)
#16 0x000000000088bbef (opt+0x88bbef)
#17 0x00007ffc0b33af45 __libc_start_main
/build/eglibc-MjiXCM/eglibc-2.19/csu/libc-start.c:321:0
#18 0x00000000008e754a (opt+0x8e754a)
Stack dump:
0. Program arguments: opt -inline -newgvn -o small-opt.bc small.bc
1. Running pass 'CallGraph Pass Manager' on module 'small.bc'.
2. Running pass 'Global Value Numbering' on function '@fn1'
Aborted (core dumped)
$
----------------------------------------
int a, b;
void fn1 ()
{
int c = 0;
for (; c < 1; c++)
{
int d = a;
L:
if (d)
{
__builtin_printf ("0");
goto L;
}
}
while (b)
__builtin_printf ("0");
int f = a;
}
int main ()
{
fn1 ();
return 0;
}</pre>
</div>
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