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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 - Module Verifier failed with "opt -ipsccp -loop-distribute": Instruction operands must be first-class values!"
href="https://bugs.llvm.org/show_bug.cgi?id=41321">41321</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Module Verifier failed with "opt -ipsccp -loop-distribute": Instruction operands must be first-class values!
</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=21712" name="attach_21712" title=".bc file of the source code">attachment 21712</a> <a href="attachment.cgi?id=21712&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
$opt -loop-versioning-licm -structurizecfg -gvn -sccp -sroa -reg2mem
-forceattrs -loop-extract-single -gvn -jump-threading small.bc -o small-opt.bc
$opt -ipsccp -loop-distribute small2-opt.bc
Instruction operands must be first-class values!
br void Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt -ipsccp
-loop-distribute small-opt.bc
1. Running pass 'Function Pass Manager' on module 'small-opt.bc'.
2. Running pass 'Module Verifier' on function '@c'
#0 0x0000562392566d2a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d9d2a)
#1 0x0000562392564d04 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7d04)
#2 0x0000562392564e42 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7e42)
#3 0x00007fe0c19ee890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x0000562391e4813e llvm::SlotTracker::SlotTracker(llvm::Function const*,
bool) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19bb13e)
#5 0x0000562391e482bf createSlotTracker(llvm::Value const*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19bb2bf)
#6 0x0000562391e4dfaf WriteAsOperandInternal(llvm::raw_ostream&, llvm::Value
const*, (anonymous namespace)::TypePrinting*, llvm::SlotTracker*, llvm::Module
const*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19c0faf)
#7 0x0000562391e5475f (anonymous
namespace)::AssemblyWriter::printInstruction(llvm::Instruction const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19c775f)
#8 0x0000562391e58991 llvm::Value::print(llvm::raw_ostream&,
llvm::ModuleSlotTracker&, bool) const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19cb991)
#9 0x0000562391f7887b llvm::VerifierSupport::Write(llvm::Value const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1aeb87b)
#10 0x0000562391f8a223 (anonymous
namespace)::Verifier::visitInstruction(llvm::Instruction&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1afd223)
#11 0x0000562391f8b85b (anonymous
namespace)::Verifier::visitTerminator(llvm::Instruction&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1afe85b)
#12 0x0000562391f931c4 (anonymous namespace)::Verifier::verify(llvm::Function
const&) (.part.1280)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1b061c4)
#13 0x0000562391f95355 (anonymous
namespace)::VerifierLegacyPass::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1b08355)
#14 0x0000562391f207a9 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a937a9)
#15 0x0000562391f20831 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a93831)
#16 0x0000562391f1fb59 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a92b59)
#17 0x0000562390abd153 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x630153)
#18 0x00007fe0c0683b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#19 0x0000562390b51f6a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x6c4f6a)
Segmentation fault (core dumped)
Without -loop-distribute pass, opt also crashes.
$opt -ipsccp small-opt.bc
Referring to a basic block in another function!
br *** stack smashing detected ***: <unknown> terminated
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt -ipsccp
small-opt.bc
1. Running pass 'Function Pass Manager' on module 'small-opt.bc'.
2. Running pass 'Module Verifier' on function '@c'
#0 0x000055f6fac13d2a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d9d2a)
#1 0x000055f6fac11d04 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7d04)
#2 0x000055f6fac11e42 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7e42)
#3 0x00007f5b60424890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f5b5f0d6e97 gsignal
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f5b5f0d8801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f5b5f121897 __libc_message
/build/glibc-OTsEL5/glibc-2.27/libio/../sysdeps/posix/libc_fatal.c:181:0
#7 0x00007f5b5f1cccd1 __GI___fortify_fail_abort
/build/glibc-OTsEL5/glibc-2.27/debug/fortify_fail.c:33:0
#8 0x00007f5b5f1ccc92 (/lib/x86_64-linux-gnu/libc.so.6+0x134c92)
#9 0x000055f6fa4f8948
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19be948)
#10 0x000055f6fa501851 (anonymous
namespace)::AssemblyWriter::printInstruction(llvm::Instruction const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19c7851)
#11 0x000055f6fa505991 llvm::Value::print(llvm::raw_ostream&,
llvm::ModuleSlotTracker&, bool) const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x19cb991)
#12 0x000055f6fa62587b llvm::VerifierSupport::Write(llvm::Value const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1aeb87b)
#13 0x000055f6fa637223 (anonymous
namespace)::Verifier::visitInstruction(llvm::Instruction&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1afd223)
#14 0x000055f6fa63885b (anonymous
namespace)::Verifier::visitTerminator(llvm::Instruction&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1afe85b)
#15 0x000055f6fa6401c4 (anonymous namespace)::Verifier::verify(llvm::Function
const&) (.part.1280)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1b061c4)
#16 0x000055f6fa642355 (anonymous
namespace)::VerifierLegacyPass::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1b08355)
#17 0x000055f6fa5cd7a9 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a937a9)
#18 0x000055f6fa5cd831 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a93831)
#19 0x000055f6fa5ccb59 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a92b59)
#20 0x000055f6f916a153 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x630153)
#21 0x00007f5b5f0b9b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#22 0x000055f6f91fef6a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x6c4f6a)
Aborted (core dumped)
By using godbolt, it shows that this problem also occurs in LLVM 6/7/trunk.
-----------------------------------------------------
#include "csmith.h"
a, b;
c() {
a = 2;
d:
for (; a;) {
int e;
for (; b;) {
int e = safe_lshift_func_int16_t_s_s;
if (e)
continue;
}
for (; c;)
goto d;
}
}</pre>
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</p>
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