<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - globalopt crashes: Assertion `use_empty() && "Uses remain when a value is destroyed!"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=43423">43423</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>globalopt crashes: Assertion `use_empty() && "Uses remain when a value is destroyed!"' 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>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>Interprocedural 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>Created <span class=""><a href="attachment.cgi?id=22552" name="attach_22552" title=".bc file of the source code">attachment 22552</a> <a href="attachment.cgi?id=22552&action=edit" title=".bc file of the source code">[details]</a></span>
.bc file of the source code
$clang -v
clang version 10.0.0 (trunk 372364)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/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/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
$opt -loop-rotate -licm -jump-threading -loop-versioning -globalopt small.bc -o
small-opt.bc
While deleting: i32 %inc
Use still stuck around after Def is destroyed: %inc.lcssa6.lver.orig = phi i32
[ 0, %for.body.lver.orig ], [ %inc, %for.inc ]
opt: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/IR/Value.cpp:91:
llvm::Value::~Value(): Assertion `use_empty() && "Uses remain when a value is
destroyed!"' failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt -loop-rotate
-licm -jump-threading -loop-versioning -globalopt small.bc -o small-opt.bc
1. Running pass 'Global Variable Optimizer' on module 'small.bc'.
#0 0x0000558e55916dca llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x277adca)
#1 0x0000558e55914aa4 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2778aa4)
#2 0x0000558e55914be2 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2778be2)
#3 0x00007f4b89210890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f4b87ec2e97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f4b87ec4801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f4b87eb439a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007f4b87eb4412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x0000558e552b3635
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2117635)
#9 0x0000558e552b3690 llvm::Value::deleteValue()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2117690)
#10 0x0000558e5516bd92 llvm::BasicBlock::~BasicBlock()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x1fcfd92)
#11 0x0000558e559a5180 llvm::removeUnreachableBlocks(llvm::Function&,
llvm::LazyValueInfo*, llvm::DomTreeUpdater*, llvm::MemorySSAUpdater*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x2809180)
#12 0x0000558e55364ebc optimizeGlobalsInModule(llvm::Module&, llvm::DataLayout
const&, llvm::function_ref<llvm::TargetLibraryInfo& (llvm::Function&)>,
llvm::function_ref<llvm::TargetTransformInfo& (llvm::Function&)>,
llvm::function_ref<llvm::BlockFrequencyInfo& (llvm::Function&)>,
llvm::function_ref<llvm::DominatorTree& (llvm::Function&)>)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x21c8ebc)
#13 0x0000558e55365e4c (anonymous
namespace)::GlobalOptLegacyPass::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x21c9e4c)
#14 0x0000558e55255541 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x20b9541)
#15 0x0000558e53a29aef main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x88daef)
#16 0x00007f4b87ea5b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#17 0x0000558e53aa17ca _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build10/bin/opt+0x9057ca)
Aborted (core dumped)
Bugpoint cannot reproduce this bug.
-------------------------------------------------
int a, c;
char b;
void d() {
for (; b != 9; ++b) {
c = 0;
for (; c; ++c)
for (; a;)
;
}
}</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>