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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 - consthoist pass crashes: Assertion `UsesNum == (ReBasesNum + NotRebasedNum) && "Not all uses are rebased"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=48306">48306</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>consthoist pass crashes: Assertion `UsesNum == (ReBasesNum + NotRebasedNum) && "Not all uses are rebased"' 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>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>Created <span class=""><a href="attachment.cgi?id=24214" name="attach_24214" title="small.bc">attachment 24214</a> <a href="attachment.cgi?id=24214&action=edit" title="small.bc">[details]</a></span>
small.bc
$clang -v
clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
f6970503d291b7cae70fe583bed392387f93f9e4)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/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/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
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 -mem2reg -consthoist -licm -jump-threading -consthoist
small.bc -o small-opt.bc
opt:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/llvm/lib/Transforms/Scalar/ConstantHoisting.cpp:915:
bool llvm::ConstantHoistingPass::emitBaseConstants(llvm::GlobalVariable*):
Assertion `UsesNum == (ReBasesNum + NotRebasedNum) && "Not all uses are
rebased"' failed.
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt
-loop-rotate -mem2reg -consthoist -licm -jump-threading -consthoist small.bc -o
small-opt.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Constant Hoisting' on function '@e'
#0 0x000055cbb6c674ac llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x2caa4ac)
#1 0x000055cbb6c65064 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x2ca8064)
#2 0x000055cbb6c651d3 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x2ca81d3)
#3 0x00007fe02a64d8a0 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x128a0)
#4 0x00007fe0292fff47 raise
/build/glibc-2ORdQG/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007fe0293018b1 abort /build/glibc-2ORdQG/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007fe0292f142a __assert_fail_base
/build/glibc-2ORdQG/glibc-2.27/assert/assert.c:89:0
#7 0x00007fe0292f14a2 (/lib/x86_64-linux-gnu/libc.so.6+0x304a2)
#8 0x000055cbb692c926
llvm::ConstantHoistingPass::emitBaseConstants(llvm::GlobalVariable*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x296f926)
#9 0x000055cbb692d58a llvm::ConstantHoistingPass::runImpl(llvm::Function&,
llvm::TargetTransformInfo&, llvm::DominatorTree&, llvm::BlockFrequencyInfo*,
llvm::BasicBlock&, llvm::ProfileSummaryInfo*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x297058a)
#10 0x000055cbb692d798 (anonymous
namespace)::ConstantHoistingLegacyPass::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x2970798)
#11 0x000055cbb646f4f8 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x24b24f8)
#12 0x000055cbb646fff9 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x24b2ff9)
#13 0x000055cbb646ed76 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x24b1d76)
#14 0x000055cbb485db34 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x8a0b34)
#15 0x00007fe0292e2b97 __libc_start_main
/build/glibc-2ORdQG/glibc-2.27/csu/../csu/libc-start.c:344:0
#16 0x000055cbb491012a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm-project/build/bin/opt+0x95312a)
Aborted (core dumped)
$cat small.c
char a=0, b=0, c=0;
int d=0;
int e() {
long f = 8166192007;
g:
for (; 0;)
for (;;)
;
for (; c;) {
if (b) {
char h = 10;
if (h)
break;
f < 0;
for (; a;)
for (; d;)
;
} else
return 0;
for (; 0;)
goto g;
}
0 & f;
}</pre>
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