[LLVMbugs] [Bug 23753] New: clang crashes at -O1 and above on x86_64-linux-gnu
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Wed Jun 3 21:28:45 PDT 2015
https://llvm.org/bugs/show_bug.cgi?id=23753
Bug ID: 23753
Summary: clang crashes 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 3.6.x.
$ clang-trunk -v
clang version 3.7.0 (trunk 238951)
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/i686-linux-gnu/5.1.0
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
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.1.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$
$ clang-trunk -O0 -c small.c
$ clang-3.6.1 -O1 -c small.c
$
$ clang-trunk -O1 -c small.c
clang: /tmp/llvm/include/llvm/Support/Casting.h:237: typename cast_retty<X, Y
*>::ret_type llvm::cast(Y *) [X = llvm::ConstantInt, Y = llvm::Value]:
Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
#0 0x2acbd48 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/clang-trunk/bin/clang+0x2acbd48)
#1 0x2acd0eb (/usr/local/clang-trunk/bin/clang+0x2acd0eb)
#2 0x7f4071e8b340 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#3 0x7f4070e26cc9 gsignal
/build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#4 0x7f4070e2a0d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0
#5 0x7f4070e1fb86 __assert_fail_base
/build/buildd/eglibc-2.19/assert/assert.c:92:0
#6 0x7f4070e1fc32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#7 0x29536dc (/usr/local/clang-trunk/bin/clang+0x29536dc)
#8 0x2967b33 llvm::ConstantExpr::getGetElementPtr(llvm::Type*, llvm::Constant*,
llvm::ArrayRef<llvm::Value*>, bool, llvm::Type*)
(/usr/local/clang-trunk/bin/clang+0x2967b33)
#9 0x282cfd3 (/usr/local/clang-trunk/bin/clang+0x282cfd3)
#10 0x282c236 llvm::SCEVExpander::expandAddToGEP(llvm::SCEV const* const*,
llvm::SCEV const* const*, llvm::PointerType*, llvm::Type*, llvm::Value*)
(/usr/local/clang-trunk/bin/clang+0x282c236)
#11 0x282e063 llvm::SCEVExpander::visitAddExpr(llvm::SCEVAddExpr const*)
(/usr/local/clang-trunk/bin/clang+0x282e063)
#12 0x282d312 llvm::SCEVExpander::expand(llvm::SCEV const*)
(/usr/local/clang-trunk/bin/clang+0x282d312)
#13 0x282f994
llvm::SCEVExpander::getAddRecExprPHILiterally(llvm::SCEVAddRecExpr const*,
llvm::Loop const*, llvm::Type*, llvm::Type*, llvm::Type*&, bool&)
(/usr/local/clang-trunk/bin/clang+0x282f994)
#14 0x283091a
llvm::SCEVExpander::expandAddRecExprLiterally(llvm::SCEVAddRecExpr const*)
(/usr/local/clang-trunk/bin/clang+0x283091a)
#15 0x282d312 llvm::SCEVExpander::expand(llvm::SCEV const*)
(/usr/local/clang-trunk/bin/clang+0x282d312)
#16 0x283056b llvm::SCEVExpander::expandCodeFor(llvm::SCEV const*, llvm::Type*,
llvm::Instruction*) (/usr/local/clang-trunk/bin/clang+0x283056b)
#17 0x25670a5 (/usr/local/clang-trunk/bin/clang+0x25670a5)
#18 0x2550756 (/usr/local/clang-trunk/bin/clang+0x2550756)
#19 0x2546dea (/usr/local/clang-trunk/bin/clang+0x2546dea)
#20 0x27c71ae llvm::LPPassManager::runOnFunction(llvm::Function&)
(/usr/local/clang-trunk/bin/clang+0x27c71ae)
#21 0x2a2fb44 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/local/clang-trunk/bin/clang+0x2a2fb44)
#22 0x2a2fd7b llvm::FPPassManager::runOnModule(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x2a2fd7b)
#23 0x2a30265 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x2a30265)
#24 0x95d74d clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions
const&, llvm::StringRef, llvm::Module*, clang::BackendAction,
llvm::raw_pwrite_stream*) (/usr/local/clang-trunk/bin/clang+0x95d74d)
#25 0x94fae5 (/usr/local/clang-trunk/bin/clang+0x94fae5)
#26 0xb65e83 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang+0xb65e83)
#27 0x756f0e clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang+0x756f0e)
#28 0x72863c clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang+0x72863c)
#29 0x70b6ec clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang+0x70b6ec)
#30 0x7028b2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
(/usr/local/clang-trunk/bin/clang+0x7028b2)
#31 0x709e7e main (/usr/local/clang-trunk/bin/clang+0x709e7e)
#32 0x7f4070e11ec5 __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:321:0
#33 0x70252d _start (/usr/local/clang-trunk/bin/clang+0x70252d)
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/instrument-bugs/CSMITH/CLANG/20150517-clang-trunk-m64-g-O3-build-054213/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/instrument-bugs/CSMITH/CLANG/20150517-clang-trunk-m64-g-O3-build-054213
-ferror-limit 19 -fmessage-length 94 -mstackrealign -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -o small.o -x c small.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'small.c'.
4. Running pass 'Loop Pass Manager' on function '@fn1'
5. Running pass 'Loop Strength Reduction' on basic block '%for.body'
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 238951)
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-a1eb8a.c
clang: note: diagnostic msg: /tmp/small-a1eb8a.sh
clang: note: diagnostic msg:
********************
$
------------------------------
int a[1], b, *c = &b;
char d;
void
fn1 ()
{
int e;
for (; e; e++)
{
b = &a[e] != (int *)&d;
*c = 0;
}
}
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