[LLVMbugs] [Bug 21378] New: clang crashes on valid code at -O1 and above on x86_64-linux-gnu
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Oct 24 19:36:06 PDT 2014
http://llvm.org/bugs/show_bug.cgi?id=21378
Bug ID: 21378
Summary: clang crashes on valid code at -O1 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 crashes when compiling the following test case at -O1
and above in both 32-bit and 64-bit modes on x86_64-linux-gnu.
This is a regression from clang 3.5.0.
$ clang-trunk -v
clang version 3.6.0 (trunk 220587)
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 -O0 -c small.c
$ clang-3.5.0 -O1 -c small.c
$
$ clang-trunk -O1 -c small.c
clang: /tmp/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp:1055:
llvm::Instruction* llvm::InstCombiner::FoldICmpCstShrCst(llvm::ICmpInst&,
llvm::Value*, llvm::Value*, llvm::ConstantInt*, llvm::ConstantInt*): Assertion
`AP2 != 0 && "Handled in InstSimplify"' failed.
#0 0x2918a92 llvm::sys::PrintStackTrace(_IO_FILE*)
(/usr/local/clang-trunk/bin/clang+0x2918a92)
#1 0x29169fb (/usr/local/clang-trunk/bin/clang+0x29169fb)
#2 0x7f90fcf6acb0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0xfcb0)
#3 0x7f90fbf910d5 gsignal
/build/buildd/eglibc-2.15/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:64:0
#4 0x7f90fbf9483b abort /build/buildd/eglibc-2.15/stdlib/abort.c:93:0
#5 0x7f90fbf89d9e __assert_fail_base
/build/buildd/eglibc-2.15/assert/assert.c:55:0
#6 0x7f90fbf89e42 (/lib/x86_64-linux-gnu/libc.so.6+0x2ee42)
#7 0x24be3fb (/usr/local/clang-trunk/bin/clang+0x24be3fb)
#8 0x24c1180 (/usr/local/clang-trunk/bin/clang+0x24c1180)
#9 0x248be0a (/usr/local/clang-trunk/bin/clang+0x248be0a)
#10 0x248d155 (/usr/local/clang-trunk/bin/clang+0x248d155)
#11 0x289feff llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/local/clang-trunk/bin/clang+0x289feff)
#12 0x289ff4b llvm::FPPassManager::runOnModule(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x289ff4b)
#13 0x28a15ef llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x28a15ef)
#14 0x93af10 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+0x93af10)
#15 0x92bbc3 (/usr/local/clang-trunk/bin/clang+0x92bbc3)
#16 0xb11d9a clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang+0xb11d9a)
#17 0x92e061 clang::CodeGenAction::ExecuteAction()
(/usr/local/clang-trunk/bin/clang+0x92e061)
#18 0x74e796 clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang+0x74e796)
#19 0x72c36e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang+0x72c36e)
#20 0x70e1dc clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang+0x70e1dc)
#21 0x704d28 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
(/usr/local/clang-trunk/bin/clang+0x704d28)
#22 0x70d46e main (/usr/local/clang-trunk/bin/clang+0x70d46e)
#23 0x7f90fbf7c76d __libc_start_main
/build/buildd/eglibc-2.15/csu/libc-start.c:258:0
#24 0x703979 _start (/usr/local/clang-trunk/bin/clang+0x703979)
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
-coverage-file
/data2/c-hunter-results/C/trans-bugs/REDUCED/20141023-clang-m32-m64-O1-O2-O3-Os-build-test389956/small.c
-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 -O1 -fdebug-compilation-dir
/data2/c-hunter-results/C/trans-bugs/REDUCED/20141023-clang-m32-m64-O1-O2-O3-Os-build-test389956
-ferror-limit 19 -fmessage-length 104 -mstackrealign -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -o small.o -x c small.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'Function Pass Manager' on module 'small.c'.
4. Running pass 'Combine redundant instructions' 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 220587)
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-c2165d.c
clang: note: diagnostic msg: /tmp/small-c2165d.sh
clang: note: diagnostic msg:
********************
$
--------------------------
static int a = -1;
int b, c, d;
void
fn1 ()
{
int e = 0, i;
for (i = 0; i < 1; i++)
{
if (c)
e = (b != 0) == a;
d = (e < 0) != e;
}
}
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