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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 - clang crashes at -O3 with polly: `isl_set_is_subset(StmtDom, AccDom) && "Scalar must be loaded in all statement instances"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=34989">34989</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang crashes at -O3 with polly: `isl_set_is_subset(StmtDom, AccDom) && "Scalar must be loaded in all statement instances"' failed.
</td>
</tr>
<tr>
<th>Product</th>
<td>Polly
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>Optimizer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>polly-dev@googlegroups.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>helloqirun@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>It crashes with polly at "-O3" in 32-bit mode only.
$ clang-trunk -v
clang version 6.0.0 (trunk 315983)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
$ clang-trunk -mllvm -polly -m32 -O3 abc.c
abc.c:10:7: warning: incompatible pointer types assigning to 'int *' from 'long
long *' [-Wincompatible-pointer-types]
h = &d;
^ ~~
abc.c:8:17: warning: relational comparison result unused [-Wunused-comparison]
(d -= 0 || a) > (*g = 5);
~~~~~~~~~~~~~~^~~~~~~~~~
clang-6.0:
/home/absozero/trunk/llvm/tools/polly/lib/CodeGen/BlockGenerators.cpp:564: void
polly::BlockGenerator::generateScalarLoads(polly::ScopStmt&,
llvm::LoopToScevMapT&, polly::ValueMapT&, isl_id_to_ast_expr*): Assertion
`isl_set_is_subset(StmtDom, AccDom) && "Scalar must be loaded in all statement
instances"' failed.
#0 0x00000000023e165a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x23e165a)
#1 0x00000000023df81e llvm::sys::RunSignalHandlers()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x23df81e)
#2 0x00000000023df980 SignalHandler(int)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x23df980)
#3 0x00007faf2046d340 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#4 0x00007faf1f25ecc9 gsignal
/build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007faf1f2620d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007faf1f257b86 __assert_fail_base
/build/buildd/eglibc-2.19/assert/assert.c:92:0
#7 0x00007faf1f257c32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#8 0x0000000002ad0b42 (/home/absozero/trunk/root-clang/bin/clang-6.0+0x2ad0b42)
#9 0x0000000002ad0ba7 polly::BlockGenerator::copyBB(polly::ScopStmt&,
llvm::BasicBlock*, llvm::DenseMap<llvm::AssertingVH<llvm::Value>,
llvm::AssertingVH<llvm::Value>,
llvm::DenseMapInfo<llvm::AssertingVH<llvm::Value> >,
llvm::detail::DenseMapPair<llvm::AssertingVH<llvm::Value>,
llvm::AssertingVH<llvm::Value> > >&, llvm::DenseMap<llvm::Loop const*,
llvm::SCEV const*, llvm::DenseMapInfo<llvm::Loop const*>,
llvm::detail::DenseMapPair<llvm::Loop const*, llvm::SCEV const*> >&,
isl_id_to_ast_expr*) (/home/absozero/trunk/root-clang/bin/clang-6.0+0x2ad0ba7)
#10 0x0000000002ad0c51 polly::BlockGenerator::copyStmt(polly::ScopStmt&,
llvm::DenseMap<llvm::Loop const*, llvm::SCEV const*,
llvm::DenseMapInfo<llvm::Loop const*>, llvm::detail::DenseMapPair<llvm::Loop
const*, llvm::SCEV const*> >&, isl_id_to_ast_expr*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2ad0c51)
#11 0x0000000002ae0b20 IslNodeBuilder::createUser(isl_ast_node*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2ae0b20)
#12 0x0000000002add478 IslNodeBuilder::createBlock(isl_ast_node*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2add478)
#13 0x0000000002add478 IslNodeBuilder::createBlock(isl_ast_node*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2add478)
#14 0x0000000002a86294 CodeGen(polly::Scop&, polly::IslAstInfo&,
llvm::LoopInfo&, llvm::DominatorTree&, llvm::ScalarEvolution&,
llvm::RegionInfo&) (/home/absozero/trunk/root-clang/bin/clang-6.0+0x2a86294)
#15 0x0000000001aad8dd llvm::RGPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1aad8dd)
#16 0x0000000001f48343 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1f48343)
#17 0x0000000001f483ec llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1f483ec)
#18 0x0000000001f48c5a llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1f48c5a)
#19 0x0000000002588805 (anonymous
namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2588805)
#20 0x0000000002589be3 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout
const&, llvm::Module*, clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2589be3)
#21 0x0000000002dca97c
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2dca97c)
#22 0x0000000002ff657c clang::ParseAST(clang::Sema&, bool, bool)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2ff657c)
#23 0x0000000002dc9dc0 clang::CodeGenAction::ExecuteAction()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2dc9dc0)
#24 0x000000000294b296 clang::FrontendAction::Execute()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x294b296)
#25 0x000000000291dc16
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x291dc16)
#26 0x00000000029e8042
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x29e8042)
#27 0x0000000000d7b008 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/absozero/trunk/root-clang/bin/clang-6.0+0xd7b008)
#28 0x0000000000d05a27 main
(/home/absozero/trunk/root-clang/bin/clang-6.0+0xd05a27)
#29 0x00007faf1f249ec5 __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:321:0
#30 0x0000000000d76929 _start
(/home/absozero/trunk/root-clang/bin/clang-6.0+0xd76929)
Stack dump:
0. Program arguments: /home/absozero/trunk/root-clang/bin/clang-6.0 -cc1
-triple i386-unknown-linux-gnu -emit-obj -disable-free -main-file-name abc.c
-mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose
-mconstructor-aliases -fuse-init-array -target-cpu pentium4 -dwarf-column-info
-debugger-tuning=gdb -momit-leaf-frame-pointer -resource-dir
/home/absozero/trunk/root-clang/lib/clang/6.0.0 -c-isystem
/usr/local/include/csmith-2.3.0 -c-isystem . -cxx-isystem
/usr/local/include/csmith-2.3.0 -cxx-isystem . -internal-isystem
/usr/local/include -internal-isystem
/home/absozero/trunk/root-clang/lib/clang/6.0.0/include
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O3
-fdebug-compilation-dir /home/absozero/projects/reduction -ferror-limit 19
-fmessage-length 142 -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -polly -o
/tmp/abc-bdca69.o -x c abc.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'Function Pass Manager' on module 'abc.c'.
4. Running pass 'Region Pass Manager' on function '@fn1'
5. Running pass 'Polly - Create LLVM-IR from SCoPs' on basic block
'%for.body'
clang-6.0: error: unable to execute command: Aborted (core dumped)
clang-6.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 6.0.0 (trunk 315983)
Target: i386-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-6.0: note: diagnostic msg: PLEASE submit a bug report to
<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed source, and
associated run script.
clang-6.0: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-6.0: note: diagnostic msg: /tmp/abc-51b00c.c
clang-6.0: note: diagnostic msg: /tmp/abc-51b00c.sh
clang-6.0: note: diagnostic msg:
********************
$ cat abc.c
int a, c;
long b, f;
long long d;
long *e;
int *g, *h;
short i;
void fn1() {
(d -= 0 || a) > (*g = 5);
for (; d <= 2; d++) {
h = &d;
f = *e;
c -= (b -= d) || i & *h;
}
}</pre>
</div>
</p>
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