[llvm-bugs] [Bug 35364] New: clang crashes with both "-mllvm -enable-newgvn" and "-mllvm -polly": Assertion `(TrackSubRegLiveness || V.RedefVNI) && "Instruction is reading nonexistent value"' failed.
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Nov 20 07:51:56 PST 2017
https://bugs.llvm.org/show_bug.cgi?id=35364
Bug ID: 35364
Summary: clang crashes with both "-mllvm -enable-newgvn" and
"-mllvm -polly": Assertion `(TrackSubRegLiveness ||
V.RedefVNI) && "Instruction is reading nonexistent
value"' 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
Either "clang-trunk -mllvm -enable-newgvn" or "clang-trunk -mllvm -polly" is
fine.
The hashtag for polly is c702e3805f3.
$ clang-trunk -v
clang version 6.0.0 (trunk 318641)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
$ clang-trunk -mllvm -polly -m32 -O3 abc.c
<warnings omitted>
4 warnings generated.
$ clang-trunk -mllvm -enable-newgvn -m32 -O3 abc.c
<warnings omitted>
4 warnings generated.
$ clang-trunk -mllvm -enable-newgvn -mllvm -polly -m32 -O3 abc.c
abc.c:18:11: warning: incompatible pointer types assigning to 'char *' from
'int *' [-Wincompatible-pointer-types]
k = &p1;
^ ~~~
abc.c:24:9: warning: incompatible pointer types assigning to 'char *' from
'short *' [-Wincompatible-pointer-types]
k = &l;
^ ~~
abc.c:27:11: warning: incompatible pointer types assigning to 'char *' from
'void (int)' [-Wincompatible-pointer-types]
j = fn1;
^ ~~~
abc.c:38:7: warning: incompatible pointer types assigning to 'int *' from 'long
long *' [-Wincompatible-pointer-types]
m = &f;
^ ~~
clang-6.0: /home/absozero/trunk/llvm/lib/CodeGen/RegisterCoalescer.cpp:2302:
{anonymous}::JoinVals::ConflictResolution
{anonymous}::JoinVals::analyzeValue(unsigned int, {anonymous}::JoinVals&):
Assertion `(TrackSubRegLiveness || V.RedefVNI) && "Instruction is reading
nonexistent value"' failed.
#0 0x0000000002109b8a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2109b8a)
#1 0x0000000002107a2e llvm::sys::RunSignalHandlers()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2107a2e)
#2 0x0000000002107b82 SignalHandler(int)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2107b82)
#3 0x00007fd866318330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007fd864e95c37 gsignal
/build/eglibc-oGUzwX/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007fd864e99028 abort
/build/eglibc-oGUzwX/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007fd864e8ebf6 __assert_fail_base
/build/eglibc-oGUzwX/eglibc-2.19/assert/assert.c:92:0
#7 0x00007fd864e8eca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x00000000019b271a (anonymous
namespace)::JoinVals::computeAssignment(unsigned int, (anonymous
namespace)::JoinVals&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x19b271a)
#9 0x00000000019b27cb (anonymous namespace)::JoinVals::mapValues((anonymous
namespace)::JoinVals&) [clone .constprop.331]
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x19b27cb)
#10 0x00000000019b3999 (anonymous
namespace)::RegisterCoalescer::joinVirtRegs(llvm::CoalescerPair&) [clone
.constprop.329] (/home/absozero/trunk/root-clang/bin/clang-6.0+0x19b3999)
#11 0x00000000019b9132 (anonymous
namespace)::RegisterCoalescer::joinCopy(llvm::MachineInstr*, bool&) [clone
.constprop.326] (/home/absozero/trunk/root-clang/bin/clang-6.0+0x19b9132)
#12 0x00000000019bb54f (anonymous
namespace)::RegisterCoalescer::copyCoalesceWorkList(llvm::MutableArrayRef<llvm::MachineInstr*>)
[clone .constprop.322]
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x19bb54f)
#13 0x00000000019bb6eb (anonymous
namespace)::RegisterCoalescer::coalesceLocals() [clone .constprop.318]
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x19bb6eb)
#14 0x00000000019bc322 (anonymous
namespace)::RegisterCoalescer::runOnMachineFunction(llvm::MachineFunction&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x19bc322)
#15 0x00000000018e87bd
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x18e87bd)
#16 0x0000000001c28903 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1c28903)
#17 0x0000000001c289cc llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1c289cc)
#18 0x0000000001c2849d llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1c2849d)
#19 0x00000000022bff75 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+0x22bff75)
#20 0x0000000002aeb0c7
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2aeb0c7)
#21 0x0000000002ccbc18 clang::ParseAST(clang::Sema&, bool, bool)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2ccbc18)
#22 0x0000000002aea47c clang::CodeGenAction::ExecuteAction()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2aea47c)
#23 0x000000000267681e clang::FrontendAction::Execute()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x267681e)
#24 0x0000000002645b66
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2645b66)
#25 0x00000000027097a3
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x27097a3)
#26 0x0000000000a593e8 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/absozero/trunk/root-clang/bin/clang-6.0+0xa593e8)
#27 0x00000000009d4d15 main
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x9d4d15)
#28 0x00007fd864e80f45 __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:321:0
#29 0x0000000000a558f9 _start
(/home/absozero/trunk/root-clang/bin/clang-6.0+0xa558f9)
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 -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/crash -ferror-limit
19 -fmessage-length 130 -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -enable-newgvn
-mllvm -polly -o /tmp/abc-0ca0b8.o -x c abc.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'abc.c'.
4. Running pass 'Simple Register Coalescing' 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 318641)
Target: i386-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-6de924.c
clang-6.0: note: diagnostic msg: /tmp/abc-6de924.sh
clang-6.0: note: diagnostic msg:
********************
$ cat abc.c
short a, e, g, i;
char b, d, h;
long c;
long long f;
void fn1(int p1) {
for (; e;) {
char *j = &b;
if (f) {
for (;;)
;
char *k;
short l;
for (; p1 <= 9; p1++) {
*j ? p1 ^= (l -= 2) ?: f : 0;
l1:
l2:
f = b <= (*k ^= (a &= 1) % *j ^ 2);
k = &p1;
}
l /= *k;
if (d)
*j = f;
p1 = 7;
k = &l;
goto l2;
for (;;) {
j = fn1;
l3:
for (; *j;)
goto l1;
}
}
goto l3;
}
for (; c; c++) {
int *m;
short *n = &g;
m = &f;
f = h || *m;
h = *m = 0;
i = g ? a < f : 0;
a = *n /= p1 >= ((f &= 8) < 0);
}
}
int main() {}
--
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