[LLVMbugs] [Bug 22704] 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
Wed Feb 25 15:33:17 PST 2015
http://llvm.org/bugs/show_bug.cgi?id=22704
Bug ID: 22704
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 on
x86_64-linux-gnu at -O1 and above in both 32-bit and 64-bit modes.
This is a regression from 3.5.x.
$ clang-trunk -v
clang version 3.7.0 (trunk 230532)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
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/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.2
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
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/include/llvm/Support/Casting.h:95: static bool
llvm::isa_impl_cl<llvm::ReturnInst, const llvm::TerminatorInst *>::doit(const
>From *) [To = llvm::ReturnInst, From = const llvm::TerminatorInst *]: Assertion
`Val && "isa<> used on a null pointer"' failed.
#0 0x29642f8 llvm::sys::PrintStackTrace(_IO_FILE*)
(/usr/local/clang-trunk/bin/clang+0x29642f8)
#1 0x29654bb (/usr/local/clang-trunk/bin/clang+0x29654bb)
#2 0x7fc7bb79f340 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#3 0x7fc7ba7a9cc9 gsignal
/build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#4 0x7fc7ba7ad0d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0
#5 0x7fc7ba7a2b86 __assert_fail_base
/build/buildd/eglibc-2.19/assert/assert.c:92:0
#6 0x7fc7ba7a2c32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#7 0x24a88d9 (/usr/local/clang-trunk/bin/clang+0x24a88d9)
#8 0x24a7bcd (/usr/local/clang-trunk/bin/clang+0x24a7bcd)
#9 0x24a67ae (/usr/local/clang-trunk/bin/clang+0x24a67ae)
#10 0x28db5c2 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/local/clang-trunk/bin/clang+0x28db5c2)
#11 0x25c0e78 (/usr/local/clang-trunk/bin/clang+0x25c0e78)
#12 0x28dbcd5 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x28dbcd5)
#13 0x92fa03 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+0x92fa03)
#14 0x921ec5 (/usr/local/clang-trunk/bin/clang+0x921ec5)
#15 0xb15903 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang+0xb15903)
#16 0x73535e clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang+0x73535e)
#17 0x707c6c clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang+0x707c6c)
#18 0x6eb744 clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang+0x6eb744)
#19 0x6e2d02 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
(/usr/local/clang-trunk/bin/clang+0x6e2d02)
#20 0x6e9f9f main (/usr/local/clang-trunk/bin/clang+0x6e9f9f)
#21 0x7fc7ba794ec5 __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:321:0
#22 0x6e2989 _start (/usr/local/clang-trunk/bin/clang+0x6e2989)
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 2.24 -momit-leaf-frame-pointer -dwarf-column-info
-coverage-file
/data2/c-hunter-results/C/insert-bugs/REDUCED/20150225-clang-trunk-m64-O3-build-0138/small.c
-resource-dir /usr/local/clang-trunk/bin/../lib/clang/3.7.0 -internal-isystem
/usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.7.0/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/insert-bugs/REDUCED/20150225-clang-trunk-m64-O3-build-0138
-ferror-limit 19 -fmessage-length 120 -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 'CallGraph Pass Manager' on module 'small.c'.
4. Running pass 'Tail Call Elimination' 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 3.7.0 (trunk 230532)
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-bee619.c
clang: note: diagnostic msg: /tmp/small-bee619.sh
clang: note: diagnostic msg:
********************
$
-------------------------
int a, b;
int
fn1 ()
{
if (b)
goto lbl;
fn1 ();
return 0;
lbl:
a = 0;
fn1 ();
return 0;
}
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