[LLVMbugs] [Bug 22086] New: clang crashes at -Os and above on x86_64-linux-gnu
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Sat Jan 3 14:03:45 PST 2015
http://llvm.org/bugs/show_bug.cgi?id=22086
Bug ID: 22086
Summary: clang crashes at -Os and above on x86_64-linux-gnu
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: su at cs.ucdavis.edu
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
The current clang trunk and 3.5.0 crash when compiling the following test case
at -Os and above in both 32-bit and 64-bit modes on x86_64-linux-gnu.
This is a regression from clang 3.4.x.
$ clang-trunk -v
clang version 3.6.0 (trunk 225086)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.1
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
$
$ clang-trunk -O1 small.c; a.out
$ clang-3.4.2 -Os small.c; a.out
$
$ clang-trunk -Os small.c
clang: /tmp/llvm/include/llvm/IR/Instructions.h:2276: llvm::Value
*llvm::PHINode::getOperand(unsigned int) const: Assertion `i_nocapture <
OperandTraits<PHINode>::operands(this) && "getOperand() out of range!"' failed.
#0 0x29dce68 llvm::sys::PrintStackTrace(_IO_FILE*)
(/usr/local/clang-trunk/bin/clang+0x29dce68)
#1 0x29de3bb (/usr/local/clang-trunk/bin/clang+0x29de3bb)
#2 0x7f033fcfecb0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0xfcb0)
#3 0x7f033eb1d0d5 gsignal
/build/buildd/eglibc-2.15/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:64:0
#4 0x7f033eb2083b abort /build/buildd/eglibc-2.15/stdlib/abort.c:93:0
#5 0x7f033eb15d9e __assert_fail_base
/build/buildd/eglibc-2.15/assert/assert.c:55:0
#6 0x7f033eb15e42 (/lib/x86_64-linux-gnu/libc.so.6+0x2ee42)
#7 0x2783d75 (/usr/local/clang-trunk/bin/clang+0x2783d75)
#8 0x2782cbf (/usr/local/clang-trunk/bin/clang+0x2782cbf)
#9 0x2782be3 (/usr/local/clang-trunk/bin/clang+0x2782be3)
#10 0x2782cbf (/usr/local/clang-trunk/bin/clang+0x2782cbf)
#11 0x2782f7f (/usr/local/clang-trunk/bin/clang+0x2782f7f)
#12 0x2782a8a llvm::ComputeNumSignBits(llvm::Value*, llvm::DataLayout const*,
unsigned int, llvm::AssumptionTracker*, llvm::Instruction const*,
llvm::DominatorTree const*) (/usr/local/clang-trunk/bin/clang+0x2782a8a)
#13 0x26cc05f (/usr/local/clang-trunk/bin/clang+0x26cc05f)
#14 0x26d4719 llvm::SimplifyInstruction(llvm::Instruction*, llvm::DataLayout
const*, llvm::TargetLibraryInfo const*, llvm::DominatorTree const*,
llvm::AssumptionTracker*) (/usr/local/clang-trunk/bin/clang+0x26d4719)
#15 0x26d51a4 (/usr/local/clang-trunk/bin/clang+0x26d51a4)
#16 0x25f4e4d llvm::SimplifyInstructionsInBlock(llvm::BasicBlock*,
llvm::DataLayout const*, llvm::TargetLibraryInfo const*)
(/usr/local/clang-trunk/bin/clang+0x25f4e4d)
#17 0x2464d0c (/usr/local/clang-trunk/bin/clang+0x2464d0c)
#18 0x2461522 (/usr/local/clang-trunk/bin/clang+0x2461522)
#19 0x245f51e (/usr/local/clang-trunk/bin/clang+0x245f51e)
#20 0x2960293 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/local/clang-trunk/bin/clang+0x2960293)
#21 0x264e4e9 (/usr/local/clang-trunk/bin/clang+0x264e4e9)
#22 0x2960a67 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x2960a67)
#23 0x9093f3 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions
const&, llvm::StringRef, llvm::Module*, clang::BackendAction,
llvm::raw_ostream*) (/usr/local/clang-trunk/bin/clang+0x9093f3)
#24 0x8fdf25 (/usr/local/clang-trunk/bin/clang+0x8fdf25)
#25 0xae8913 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang+0xae8913)
#26 0x705ede clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang+0x705ede)
#27 0x6d8cbc clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang+0x6d8cbc)
#28 0x6ba90a clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang+0x6ba90a)
#29 0x6b15c2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
(/usr/local/clang-trunk/bin/clang+0x6b15c2)
#30 0x6b8f92 main (/usr/local/clang-trunk/bin/clang+0x6b8f92)
#31 0x7f033eb0876d __libc_start_main
/build/buildd/eglibc-2.15/csu/libc-start.c:258:0
#32 0x6b1229 _start (/usr/local/clang-trunk/bin/clang+0x6b1229)
Stack dump:
0. Program arguments: /usr/local/clang-trunk/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name small.c
-mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-target-linker-version 2.22 -momit-leaf-frame-pointer -dwarf-column-info
-resource-dir /usr/local/clang-trunk/bin/../lib/clang/3.6.0 -internal-isystem
/usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.6.0/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -Os -fdebug-compilation-dir
/data2/c-hunter-results/C/trans-bugs/REDUCED/20141225-clang-m32-m64-O2-O3-Os-build-test98879
-ferror-limit 19 -fmessage-length 100 -mstackrealign -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp
-o /tmp/small-d16385.o -x c small.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'small.c'.
4. Running pass 'Jump Threading' on function '@fn1'
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.6.0 (trunk 225086)
Target: x86_64-unknown-linux-gnu
Thread model: posix
clang: 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: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/small-0d1d60.c
clang: note: diagnostic msg: /tmp/small-0d1d60.sh
clang: note: diagnostic msg:
********************
$
--------------------------------------
static int a[5] = { 0, 0, 0, 0, 1 };
int b, c, d, e;
short f;
void
fn1 ()
{
int g = 0;
for (; e;)
for (;; g++)
{
if (d)
{
if (e == 0)
a[4] = 0;
for (d = 0; d < 1; d++)
;
}
else
for (; g; g++)
if (a[4])
break;
if (a[4])
break;
f = g;
if (f <= (d || b))
c = 0;
}
}
int
main ()
{
fn1 ();
return 0;
}
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