[llvm-bugs] [Bug 35813] New: clang crashes with "-mllvm -enable-newgvn": Assertion `User && To != User' failed.
via llvm-bugs
llvm-bugs at lists.llvm.org
Wed Jan 3 14:58:16 PST 2018
https://bugs.llvm.org/show_bug.cgi?id=35813
Bug ID: 35813
Summary: clang crashes with "-mllvm -enable-newgvn": Assertion
`User && To != User' failed.
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: unassignedclangbugs at nondot.org
Reporter: helloqirun at gmail.com
CC: llvm-bugs at lists.llvm.org
It happens only with newgvn enabled.
$ clang-trunk -v
clang version 6.0.0 (trunk 321697)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
$ clang-trunk -mllvm -enable-newgvn -O2 abc.c
abc.c:19:23: warning: | has lower precedence than >; > will be evaluated first
[-Wparentheses]
a.f0 = 2 > e.f0 | d.f3;
~~~~~~~~~^
abc.c:19:23: note: place parentheses around the '>' expression to silence this
warning
a.f0 = 2 > e.f0 | d.f3;
^
( )
abc.c:19:23: note: place parentheses around the | expression to evaluate it
first
a.f0 = 2 > e.f0 | d.f3;
^
( )
clang-6.0: /home/absozero/trunk/llvm/lib/Transforms/Scalar/NewGVN.cpp:2079:
void {anonymous}::NewGVN::addAdditionalUsers(llvm::Value*, llvm::Value*) const:
Assertion `User && To != User' failed.
#0 0x0000000002173c1a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2173c1a)
#1 0x0000000002171abe llvm::sys::RunSignalHandlers()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2171abe)
#2 0x0000000002171c12 SignalHandler(int)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2171c12)
#3 0x00007f8044eb0330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007f8043a2dc37 gsignal
/build/eglibc-oGUzwX/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007f8043a31028 abort
/build/eglibc-oGUzwX/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007f8043a26bf6 __assert_fail_base
/build/eglibc-oGUzwX/eglibc-2.19/assert/assert.c:92:0
#7 0x00007f8043a26ca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x000000000205a35b (anonymous
namespace)::NewGVN::addAdditionalUsers(llvm::Value*, llvm::Value*) const
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x205a35b)
#9 0x000000000205a53f (anonymous
namespace)::NewGVN::checkSimplificationResults(llvm::GVNExpression::Expression*,
llvm::Instruction*, llvm::Value*) const [clone .constprop.1458]
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x205a53f)
#10 0x000000000205a8d7 (anonymous
namespace)::NewGVN::createExpression(llvm::Instruction*) const
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x205a8d7)
#11 0x000000000205b39b (anonymous
namespace)::NewGVN::performSymbolicEvaluation(llvm::Value*,
llvm::SmallPtrSetImpl<llvm::Value*>&) const [clone .isra.1336]
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x205b39b)
#12 0x0000000002066d3c (anonymous
namespace)::NewGVN::iterateTouchedInstructions()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2066d3c)
#13 0x000000000206960b (anonymous namespace)::NewGVN::runGVN() [clone
.constprop.1401] (/home/absozero/trunk/root-clang/bin/clang-6.0+0x206960b)
#14 0x000000000206b4c7 (anonymous
namespace)::NewGVNLegacyPass::runOnFunction(llvm::Function&) [clone .part.1394]
[clone .constprop.1398]
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x206b4c7)
#15 0x0000000001c8a0a3 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1c8a0a3)
#16 0x00000000017067ce (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x17067ce)
#17 0x0000000001c89c3d llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1c89c3d)
#18 0x0000000002330cce 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+0x2330cce)
#19 0x0000000002b74a37
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2b74a37)
#20 0x0000000002d55dc8 clang::ParseAST(clang::Sema&, bool, bool)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2d55dc8)
#21 0x0000000002b73dec clang::CodeGenAction::ExecuteAction()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2b73dec)
#22 0x00000000026f778e clang::FrontendAction::Execute()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x26f778e)
#23 0x00000000026c5a76
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x26c5a76)
#24 0x000000000278b3a3
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x278b3a3)
#25 0x0000000000a69368 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/absozero/trunk/root-clang/bin/clang-6.0+0xa69368)
#26 0x00000000009e1ece main
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x9e1ece)
#27 0x00007f8043a18f45 __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:321:0
#28 0x0000000000a65469 _start
(/home/absozero/trunk/root-clang/bin/clang-6.0+0xa65469)
Stack dump:
0. Program arguments: /home/absozero/trunk/root-clang/bin/clang-6.0 -cc1
-triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name abc.c
-mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -resource-dir
/home/absozero/trunk/root-clang/lib/clang/6.0.0 -internal-isystem
/usr/local/include -internal-isystem
/home/absozero/trunk/root-clang/lib/clang/6.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O2
-fdebug-compilation-dir /home/absozero/projects/reduction/crash -ferror-limit
19 -fmessage-length 172 -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -enable-newgvn -o
/tmp/abc-39bdb7.o -x c abc.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'abc.c'.
4. Running pass 'Global Value Numbering' on function '@fn1'
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 321697)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-6.0: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ 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-363af1.c
clang-6.0: note: diagnostic msg: /tmp/abc-363af1.sh
clang-6.0: note: diagnostic msg:
********************
$ cat abc.c
struct {
signed f0 : 17;
} a;
union {
int f0;
int f3;
} d;
union U2 {
unsigned f0;
int f1;
};
int b;
short c;
void fn1() {
union U2 e;
for (;;) {
d.f0 = 0;
for (; d.f0 <= 3; d.f0++) {
a.f0 = 2 > e.f0 | d.f3;
for (; b;)
for (;;)
;
}
e.f1 = 0;
for (; c;)
e.f1 = 5;
}
}
int main() {}
--
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20180103/141c3512/attachment.html>
More information about the llvm-bugs
mailing list