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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 'Value Propagation' pass crashes with "opt -early-cse-memssa -loop-rotate -newgvn -mem2reg -loop-vectorize -indvars -gvn -licm -jump-threading -instcombine -loop-reroll -correlated-propagation""
href="https://bugs.llvm.org/show_bug.cgi?id=41696">41696</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>'Value Propagation' pass crashes with "opt -early-cse-memssa -loop-rotate -newgvn -mem2reg -loop-vectorize -indvars -gvn -licm -jump-threading -instcombine -loop-reroll -correlated-propagation"
</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=21861" name="attach_21861" title=".bc file of the source code">attachment 21861</a> <a href="attachment.cgi?id=21861&action=edit" title=".bc file of the source code">[details]</a></span>
.bc file of the source code
$clang -v
clang version 9.0.0 (trunk 355281)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/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/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -mllvm -disable-llvm-optzns small.c -o small.bc
$opt -early-cse-memssa -loop-rotate -newgvn -mem2reg -loop-vectorize -indvars
-gvn -licm -jump-threading -instcombine -loop-reroll -correlated-propagation
small.bc -o small-opt.bc
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt -early-cse-memssa
-loop-rotate -newgvn -mem2reg -loop-vectorize -indvars -gvn -licm
-jump-threading -instcombine -loop-reroll -correlated-propagation small.bc -o
small-opt.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Value Propagation' on function '@c'
#0 0x0000562f5e2e2d2a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d9d2a)
#1 0x0000562f5e2e0d04 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7d04)
#2 0x0000562f5e2e0e42 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7e42)
#3 0x00007fe71217e890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x0000562f5d6d629d getValueFromCondition(llvm::Value*, llvm::Value*, bool,
llvm::DenseMap<llvm::Value*, llvm::ValueLatticeElement,
llvm::DenseMapInfo<llvm::Value*>, llvm::detail::DenseMapPair<llvm::Value*,
llvm::ValueLatticeElement> >&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14cd29d)
#5 0x0000562f5d6d64ef getValueFromCondition(llvm::Value*, llvm::Value*, bool)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14cd4ef)
#6 0x0000562f5d6d75a3 (anonymous
namespace)::LazyValueInfoImpl::getEdgeValue(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*, llvm::ValueLatticeElement&, llvm::Instruction*) (.part.469)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14ce5a3)
#7 0x0000562f5d6d7845 (anonymous
namespace)::LazyValueInfoImpl::getEdgeValue(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*, llvm::ValueLatticeElement&, llvm::Instruction*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14ce845)
#8 0x0000562f5d6db2f4 llvm::LazyValueInfo::getConstantOnEdge(llvm::Value*,
llvm::BasicBlock*, llvm::BasicBlock*, llvm::Instruction*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14d22f4)
#9 0x0000562f5e03d842 runImpl(llvm::Function&, llvm::LazyValueInfo*,
llvm::DominatorTree*, llvm::SimplifyQuery const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1e34842)
#10 0x0000562f5e03f990 (anonymous
namespace)::CorrelatedValuePropagation::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1e36990)
#11 0x0000562f5dc9c7a9 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a937a9)
#12 0x0000562f5dc9c831 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a93831)
#13 0x0000562f5dc9bb59 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a92b59)
#14 0x0000562f5c839153 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x630153)
#15 0x00007fe710e13b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#16 0x0000562f5c8cdf6a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x6c4f6a)
Segmentation fault (core dumped)
-----------------------------------------
int a[10];
int b;
int c() {
unsigned long int d[8];
int *e = &a[2];
unsigned int f[8] = {e, e, e};
for (a[2] = 0; a[2] < 8; a[2]++)
d[a[2]] = 0;
b = ~*e >= *e;
}</pre>
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