[llvm-bugs] [Bug 33461] New: clang crashes with "-mllvm -enable-newgvn": Assertion `Res.second && "Stored expression conflict exists in expression table"' failed.
via llvm-bugs
llvm-bugs at lists.llvm.org
Wed Jun 14 11:06:12 PDT 2017
https://bugs.llvm.org/show_bug.cgi?id=33461
Bug ID: 33461
Summary: clang crashes with "-mllvm -enable-newgvn": Assertion
`Res.second && "Stored expression conflict exists in
expression table"' 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
The following code crashes the current trunk version at "-O2" with "-mllvm
-enable-newgvn". Level "-O1" works fine. I have also a case that fails at "-O3"
and above.
$ clang-trunk --version
clang version 5.0.0 (trunk 305375)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
$ clang-trunk -mllvm -enable-newgvn -O2 abc.c
abc.c:8:14: warning: incompatible pointer types initializing 'short *' with an
expression of type 'short **'; remove & [-Wincompatible-pointer-types]
short *g = &e;
^ ~~
clang-5.0: /home/absozero/trunk/llvm/lib/Transforms/Scalar/NewGVN.cpp:3024:
void (anonymous namespace)::NewGVN::verifyStoreExpressions() const: Assertion
`Res.second && "Stored expression conflict exists in expression table"' failed.
#0 0x0000000001d11794 PrintStackTraceSignalHandler(void*)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1d11794)
#1 0x0000000001d11ab6 SignalHandler(int)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1d11ab6)
#2 0x00007fbfcccc8330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#3 0x00007fbfcb845c37 gsignal
/build/eglibc-oGUzwX/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#4 0x00007fbfcb849028 abort
/build/eglibc-oGUzwX/eglibc-2.19/stdlib/abort.c:91:0
#5 0x00007fbfcb83ebf6 __assert_fail_base
/build/eglibc-oGUzwX/eglibc-2.19/assert/assert.c:92:0
#6 0x00007fbfcb83eca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#7 0x0000000001bfab94 (anonymous namespace)::NewGVN::runGVN()
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1bfab94)
#8 0x0000000001bfe646 (anonymous
namespace)::NewGVNLegacyPass::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1bfe646)
#9 0x000000000189653f llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x189653f)
#10 0x000000000272f556 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x272f556)
#11 0x0000000001896c95 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x1896c95)
#12 0x0000000001e9d0eb 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-5.0+0x1e9d0eb)
#13 0x00000000025bc937
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x25bc937)
#14 0x0000000002a26916 clang::ParseAST(clang::Sema&, bool, bool)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x2a26916)
#15 0x0000000002280758 clang::FrontendAction::Execute()
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x2280758)
#16 0x00000000022313e1
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x22313e1)
#17 0x00000000023070aa
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x23070aa)
#18 0x0000000000844d44 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/absozero/trunk/root-clang/bin/clang-5.0+0x844d44)
#19 0x00000000008428cc main
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x8428cc)
#20 0x00007fbfcb830f45 __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:321:0
#21 0x000000000083fd49 _start
(/home/absozero/trunk/root-clang/bin/clang-5.0+0x83fd49)
Stack dump:
0. Program arguments: /home/absozero/trunk/root-clang/bin/clang-5.0 -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
-momit-leaf-frame-pointer -dwarf-column-info -debugger-tuning=gdb -resource-dir
/home/absozero/trunk/root-clang/lib/clang/5.0.0 -internal-isystem
/usr/local/include -internal-isystem
/home/absozero/trunk/root-clang/lib/clang/5.0.0/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-bc8c3c.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-5.0: error: unable to execute command: Aborted (core dumped)
clang-5.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 5.0.0 (trunk 305375)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-5.0: 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-5.0: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-5.0: note: diagnostic msg: /tmp/abc-f4218e.c
clang-5.0: note: diagnostic msg: /tmp/abc-f4218e.sh
clang-5.0: note: diagnostic msg:
********************
$ cat abc.c
short a, b, c;
void fn1() {
long d;
short *e = &b;
for (; d <= 3; d++)
if (*e) {
unsigned f;
short *g = &e;
*g = d;
for (;; b++) {
f /= *e += c < f;
l1:;
}
l2:;
}
for (; a;)
goto l2;
goto l1;
}
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