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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 - invalid IR caused by "-loop-rotate -jump-threading -load-store-vectorizer -sroa -gvn -correlated-propagation -scalarizer""
href="https://bugs.llvm.org/show_bug.cgi?id=50476">50476</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>invalid IR caused by "-loop-rotate -jump-threading -load-store-vectorizer -sroa -gvn -correlated-propagation -scalarizer"
</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=24891" name="attach_24891" title="small.bc">attachment 24891</a> <a href="attachment.cgi?id=24891&action=edit" title="small.bc">[details]</a></span>
small.bc
$clang -v
clang version 13.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
d56729b4a4393da9c65bdfe762b51f8b7b0ce0ca)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/oscar/compiler/llvm-project/build/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
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/10
Candidate multilib: .;@m64
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
$opt -loop-rotate -jump-threading -load-store-vectorizer -sroa -gvn
-correlated-propagation -scalarizer small.bc
WARNING: You're attempting to print out a bitcode file.
This is inadvisable as it may cause display problems. If
you REALLY want to taste LLVM bitcode first-hand, you
can force output with the `-f' option.
PHI nodes not grouped at top of basic block!
%cleanup.dest.slot.0 = phi i32 [ 2, %for.body5 ], [ undef, %if.end ], [ 1,
%if.else ]
label %cleanup
LLVM ERROR: Broken module found, compilation aborted!
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/oscar/compiler/llvm-project/build/bin/opt
-loop-rotate -jump-threading -load-store-vectorizer -sroa -gvn
-correlated-propagation -scalarizer small.bc
#0 0x000055773877aeac llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/oscar/compiler/llvm-project/build/bin/opt+0x1a98eac)
#1 0x0000557738778d64 llvm::sys::RunSignalHandlers()
(/home/oscar/compiler/llvm-project/build/bin/opt+0x1a96d64)
#2 0x0000557738778ed3 SignalHandler(int) Signals.cpp:0:0
#3 0x00007f04bc544980 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)
#4 0x00007f04bb1aafb7 raise
/build/glibc-S9d2JN/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f04bb1ac921 abort /build/glibc-S9d2JN/glibc-2.27/stdlib/abort.c:81:0
#6 0x00005577386d9f76 llvm::report_fatal_error(llvm::Twine const&, bool)
(/home/oscar/compiler/llvm-project/build/bin/opt+0x19f7f76)
#7 0x00005577386da0a8
(/home/oscar/compiler/llvm-project/build/bin/opt+0x19f80a8)
#8 0x0000557737f99d6a llvm::VerifierPass::run(llvm::Module&,
llvm::AnalysisManager<llvm::Module>&)
(/home/oscar/compiler/llvm-project/build/bin/opt+0x12b7d6a)
#9 0x000055773724b6b1 llvm::detail::PassModel<llvm::Module,
llvm::VerifierPass, llvm::PreservedAnalyses,
llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&,
llvm::AnalysisManager<llvm::Module>&)
(/home/oscar/compiler/llvm-project/build/bin/opt+0x5696b1)
#10 0x0000557737f6f724 llvm::PassManager<llvm::Module,
llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&,
llvm::AnalysisManager<llvm::Module>&)
(/home/oscar/compiler/llvm-project/build/bin/opt+0x128d724)
#11 0x00005577372555b1 llvm::runPassPipeline(llvm::StringRef, llvm::Module&,
llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*,
llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef,
llvm::ArrayRef<llvm::StringRef>, llvm::opt_tool::OutputKind,
llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool)
(/home/oscar/compiler/llvm-project/build/bin/opt+0x5735b1)
#12 0x00005577371d7274 main
(/home/oscar/compiler/llvm-project/build/bin/opt+0x4f5274)
#13 0x00007f04bb18dbf7 __libc_start_main
/build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:344:0
#14 0x000055773724975a _start
(/home/oscar/compiler/llvm-project/build/bin/opt+0x56775a)
Aborted (core dumped)
By using bugpoint, it shows this bug is caused by the scalarizer pass.
--------------------------------------------
int a, d;
long b;
char c;
short e;
short *f() {
int g;
d = 0;
h : {
int *i[] = {&g, &g, &g, &g};
b = 1;
for (; b;) {
int **j = &i[3];
int k, l, m;
for (; c;)
goto h;
*j = &a;
if (d)
;
else
return &e;
}
i[3];
}
}</pre>
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