<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 - gvn-hoist crashes with segmentation fault"
href="https://bugs.llvm.org/show_bug.cgi?id=43224">43224</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>gvn-hoist crashes with segmentation fault
</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=22473" name="attach_22473" title=".bc file of the source code">attachment 22473</a> <a href="attachment.cgi?id=22473&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 371001)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/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 -early-cse-memssa -die -gvn-hoist small.bc -o small-opt.bc
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt
-early-cse-memssa -die -gvn-hoist small.bc -o small-opt.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Early GVN Hoisting of Expressions' on function '@d'
#0 0x000055a336f21cfa llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x2742cfa)
#1 0x000055a336f1f9d4 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x27409d4)
#2 0x000055a336f1fb12 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x2740b12)
#3 0x00007f49a9045890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x000055a33678f3c0 llvm::BasicBlock::getModule() const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x1fb03c0)
#5 0x000055a336234309 llvm::MemoryLocation::get(llvm::LoadInst const*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x1a55309)
#6 0x000055a33623a053 llvm::MemoryLocation::getOrNone(llvm::Instruction
const*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x1a5b053)
#7 0x000055a33623df84
llvm::MemorySSAUtil::defClobbersUseOrDef(llvm::MemoryDef*, llvm::MemoryUseOrDef
const*, llvm::AAResults&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x1a5ef84)
#8 0x000055a336c9b5be llvm::GVNHoist::hasEHOrLoadsOnPath(llvm::Instruction
const*, llvm::MemoryDef*, int&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x24bc5be)
#9 0x000055a336c9e90a
llvm::GVNHoist::findHoistableCandidates(llvm::DenseMap<llvm::BasicBlock*,
llvm::SmallVector<llvm::CHIArg, 2u>, llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, llvm::SmallVector<llvm::CHIArg,
2u> > >&, llvm::GVNHoist::InsKind,
llvm::SmallVector<std::pair<llvm::BasicBlock*,
llvm::SmallVector<llvm::Instruction*, 4u> >, 4u>&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x24bf90a)
#10 0x000055a336ca0a52
llvm::GVNHoist::computeInsertionPoints(llvm::DenseMap<std::pair<unsigned int,
unsigned int>, llvm::SmallVector<llvm::Instruction*, 4u>,
llvm::DenseMapInfo<std::pair<unsigned int, unsigned int> >,
llvm::detail::DenseMapPair<std::pair<unsigned int, unsigned int>,
llvm::SmallVector<llvm::Instruction*, 4u> > > const&,
llvm::SmallVector<std::pair<llvm::BasicBlock*,
llvm::SmallVector<llvm::Instruction*, 4u> >, 4u>&, llvm::GVNHoist::InsKind)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x24c1a52)
#11 0x000055a336ca2458 llvm::GVNHoist::hoistExpressions(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x24c3458)
#12 0x000055a336ca2a22 llvm::GVNHoist::run(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x24c3a22)
#13 0x000055a336ca2f0a llvm::GVNHoistLegacyPass::runOnFunction(llvm::Function&)
(.part.597)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x24c3f0a)
#14 0x000055a3368793a9 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x209a3a9)
#15 0x000055a3368794a1 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x209a4a1)
#16 0x000055a336878601 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x2099601)
#17 0x000055a335065eff main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x886eff)
#18 0x00007f49a7cdab97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#19 0x000055a3350dcf2a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build7/bin/opt+0x8fdf2a)
Segmentation fault (core dumped)
------------------------------------------------
int *a;
void(b)();
long(c)();
int d() {
int e;
long f, g = 5;
{
int h, e = 0;
f = c(e, 5);
b(f);
char i = g;
{
long j, m;
int k, l = 0;
if (0L < l)
*a;
else
return 0;
}
}
return 0;
}</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>