<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 - clang crashes on valid code at -Os and above on x86_64-linux-gnu: Assertion `Index < Length && "Invalid index!"' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=52090">52090</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang crashes on valid code at -Os and above on x86_64-linux-gnu: Assertion `Index < Length && "Invalid index!"' failed
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zhendong.su@inf.ethz.ch
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>[503] % clangtk -v
clang version 14.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
a84b78198cdd76a2171fdf6b0d80e49f4a4cf572)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/opfuzz/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
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
[504] %
[504] % clangtk -O1 small.c; ./a.out
[505] %
[505] % clangtk -Os small.c
clang-14:
/local/suz-local/software/clangbuild/llvm-project/llvm/include/llvm/ADT/ArrayRef.h:257:
const T& llvm::ArrayRef<T>::operator[](size_t) const [with T = llvm::Value*;
size_t = long unsigned int]: Assertion `Index < Length && "Invalid index!"'
failed.
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments:
/local/suz-local/software/local/clang-trunk/bin/clang-14 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj --mrelax-relocations -disable-free
-main-file-name small.c -mrelocation-model static -mframe-pointer=none
-fmath-errno -fno-rounding-math -mconstructor-aliases -funwind-tables=2
-target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb
-fcoverage-compilation-dir=/home/suz -resource-dir
/local/suz-local/software/local/clang-trunk/lib/clang/14.0.0 -I
/usr/local/include/csmith -I /local/suz-local/software/local/include
-internal-isystem
/local/suz-local/software/local/clang-trunk/lib/clang/14.0.0/include
-internal-isystem /usr/local/include -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../x86_64-linux-gnu/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -Os
-fdebug-compilation-dir=/home/suz -ferror-limit 19 -fgnuc-version=4.2.1
-fcolor-diagnostics -vectorize-loops -vectorize-slp -faddrsig
-D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/small-39809b.o -x c small.c
1. <eof> parser at end of file
2. Optimizer
#0 0x00005648820ddc9f PrintStackTraceSignalHandler(void*) Signals.cpp:0:0
#1 0x00005648820db44d SignalHandler(int) Signals.cpp:0:0
#2 0x00007f04f8c85980 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)
#3 0x00007f04f7936fb7 raise
/build/glibc-S9d2JN/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#4 0x00007f04f7938921 abort /build/glibc-S9d2JN/glibc-2.27/stdlib/abort.c:81:0
#5 0x00007f04f792848a __assert_fail_base
/build/glibc-S9d2JN/glibc-2.27/assert/assert.c:89:0
#6 0x00007f04f7928502 (/lib/x86_64-linux-gnu/libc.so.6+0x30502)
#7 0x00005648822f813e
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3cc713e)
#8 0x00005648822fcca8
llvm::slpvectorizer::BoUpSLP::TreeEntry::isSame(llvm::ArrayRef<llvm::Value*>)
const (/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3ccbca8)
#9 0x000056488230d71a
llvm::slpvectorizer::BoUpSLP::isGatherShuffledEntry(llvm::slpvectorizer::BoUpSLP::TreeEntry
const*, llvm::SmallVectorImpl<int>&,
llvm::SmallVectorImpl<llvm::slpvectorizer::BoUpSLP::TreeEntry const*>&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3cdc71a)
#10 0x0000564882318bd6
llvm::slpvectorizer::BoUpSLP::getEntryCost(llvm::slpvectorizer::BoUpSLP::TreeEntry
const*, llvm::ArrayRef<llvm::Value*>)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3ce7bd6)
#11 0x00005648823343c4
llvm::slpvectorizer::BoUpSLP::getTreeCost(llvm::ArrayRef<llvm::Value*>)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3d033c4)
#12 0x0000564882338075
llvm::SLPVectorizerPass::tryToVectorizeList(llvm::ArrayRef<llvm::Value*>,
llvm::slpvectorizer::BoUpSLP&, bool) (.constprop.2100) SLPVectorizer.cpp:0:0
#13 0x000056488233c304
llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*,
llvm::slpvectorizer::BoUpSLP&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3d0b304)
#14 0x000056488233f7bc llvm::SLPVectorizerPass::runImpl(llvm::Function&,
llvm::ScalarEvolution*, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo*,
llvm::AAResults*, llvm::LoopInfo*, llvm::DominatorTree*,
llvm::AssumptionCache*, llvm::DemandedBits*, llvm::OptimizationRemarkEmitter*)
(.part.2083) SLPVectorizer.cpp:0:0
#15 0x00005648823407cb llvm::SLPVectorizerPass::run(llvm::Function&,
llvm::AnalysisManager<llvm::Function>&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3d0f7cb)
#16 0x00005648832ec511 llvm::detail::PassModel<llvm::Function,
llvm::SLPVectorizerPass, llvm::PreservedAnalyses,
llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&,
llvm::AnalysisManager<llvm::Function>&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x4cbb511)
#17 0x000056488188761c llvm::PassManager<llvm::Function,
llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&,
llvm::AnalysisManager<llvm::Function>&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x325661c)
#18 0x000056487fe0b481 llvm::detail::PassModel<llvm::Function,
llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function> >,
llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function>
<span class="quote">>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&)</span >
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x17da481)
#19 0x0000564881886f04 llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&,
llvm::AnalysisManager<llvm::Module>&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3255f04)
#20 0x000056487fe0bd51 llvm::detail::PassModel<llvm::Module,
llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses,
llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&,
llvm::AnalysisManager<llvm::Module>&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x17dad51)
#21 0x000056488188564d llvm::PassManager<llvm::Module,
llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&,
llvm::AnalysisManager<llvm::Module>&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x325464d)
#22 0x00005648823e3096 (anonymous
namespace)::EmitAssemblyHelper::EmitAssemblyWithNewPassManager(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >) BackendUtil.cpp:0:0
#23 0x00005648823e7a03 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef,
llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x3db6a03)
#24 0x0000564883115f1a
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x4ae4f1a)
#25 0x0000564883fc1189 clang::ParseAST(clang::Sema&, bool, bool)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x5990189)
#26 0x0000564883114ab8 clang::CodeGenAction::ExecuteAction()
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x4ae3ab8)
#27 0x0000564882a4a2a1 clang::FrontendAction::Execute()
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x44192a1)
#28 0x00005648829e6a7a
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x43b5a7a)
#29 0x0000564882b19203
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x44e8203)
#30 0x000056487fb6883c cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/local/suz-local/software/local/clang-trunk/bin/clang-14+0x153783c)
#31 0x000056487fb63c39 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
driver.cpp:0:0
#32 0x000056487fa8c731 main
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x145b731)
#33 0x00007f04f7919bf7 __libc_start_main
/build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:344:0
#34 0x000056487fb637aa _start
(/local/suz-local/software/local/clang-trunk/bin/clang-14+0x15327aa)
clang-14: error: unable to execute command: Aborted
clang-14: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 14.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
a84b78198cdd76a2171fdf6b0d80e49f4a4cf572)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/opfuzz/bin
clang-14: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-14: note: diagnostic msg: /tmp/small-e29f5d.c
clang-14: note: diagnostic msg: /tmp/small-e29f5d.sh
clang-14: note: diagnostic msg:
********************
[506] %
[506] % cat small.c
int a, b, c, d, e, f;
int main() {
int h, i = 1, k = 0, g;
if (c && e)
goto L3;
L1:
if (f) {
while (k)
;
k = i;
int m = i;
L2:
if (m)
goto L3;
}
if (a) {
if (h)
goto L2;
int o = i;
if (b)
i = c = d;
if (a)
L3:
if (c)
goto L4;
h || (h = 1);
g = o;
}
L4:
if (a)
goto L1;
if (b && g)
__builtin_abort ();
return 0;
}</pre>
</div>
</p>
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