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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 -jump-threading -mem2reg -gvn -ipsccp -gvn -adce -gvn-hoist": Assertion `UpperBound != 0' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=34462">34462</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>opt crashes with "opt -jump-threading -mem2reg -gvn -ipsccp -gvn -adce -gvn-hoist": Assertion `UpperBound != 0' 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 6.0.0 (trunk 312462)
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 -w -O3 -mllvm -disable-llvm-optzns -c -emit-llvm -o small.bc small.c
$ opt -jump-threading -mem2reg -gvn -ipsccp -gvn -adce -gvn-hoist -o
small-opt.bc small.bc
opt: /tmp/llvm-builder/llvm-source-trunk/lib/Analysis/MemorySSA.cpp:1248: void
llvm::MemorySSA::OptimizeUses::optimizeUsesInBlock(const llvm::BasicBlock*,
long unsigned int&, long unsigned int&,
llvm::SmallVectorImpl<llvm::MemoryAccess*>&,
llvm::DenseMap<{anonymous}::MemoryLocOrCall,
llvm::MemorySSA::OptimizeUses::MemlocStackInfo>&): Assertion `UpperBound != 0'
failed.
#0 0x0000000001f3031a (opt+0x1f3031a)
#1 0x0000000001f2e4ae (opt+0x1f2e4ae)
#2 0x0000000001f2e610 (opt+0x1f2e610)
#3 0x00007fe7428f5330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007fe7416ddc37 gsignal
/build/eglibc-SvCtMH/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007fe7416e1028 abort
/build/eglibc-SvCtMH/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007fe7416d6bf6 __assert_fail_base
/build/eglibc-SvCtMH/eglibc-2.19/assert/assert.c:92:0
#7 0x00007fe7416d6ca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x0000000001557cb3 (opt+0x1557cb3)
#9 0x0000000001559ce2 (opt+0x1559ce2)
#10 0x000000000155a0dc (opt+0x155a0dc)
#11 0x0000000001a51963 (opt+0x1a51963)
#12 0x0000000001a51a0c (opt+0x1a51a0c)
#13 0x0000000001a5227a (opt+0x1a5227a)
#14 0x00000000007fcfb7 (opt+0x7fcfb7)
#15 0x00007fe7416c8f45 __libc_start_main
/build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:321:0
#16 0x0000000000860c6a (opt+0x860c6a)
Stack dump:
0. Program arguments: opt -jump-threading -mem2reg -gvn -ipsccp -gvn -adce
-gvn-hoist -o small-opt.bc small.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Memory SSA' on function '@fn1'
Aborted (core dumped)
$
-------------------------------------------
int printf (const char *, ...);
int a, b, c, d, e, f, g, h;
void fn1 ()
{
long j = -2810502576847672268;
int k = j;
if (b)
printf ("0");
if (k)
h;
if (b)
while (e)
{
char l = c || d || a;
int m, n = m / j;
m = n = e;
if (c || (f && j > l))
printf ("1");
if (j && l)
continue;
e = n;
if (g)
return;
}
}
int main ()
{
fn1 ();
return 0;
}</pre>
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