[LLVMbugs] [Bug 18361] New: clang crashes on valid code at -O2 and -O3 on x86_64-linux-gnu
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Thu Jan 2 20:39:25 PST 2014
http://llvm.org/bugs/show_bug.cgi?id=18361
Bug ID: 18361
Summary: clang crashes on valid code at -O2 and -O3 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 testcase at -O2
and -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu.
This is a regression from clang 3.3.
$ clang-trunk -v
clang version 3.5 (trunk 198325) (llvm/trunk 198324)
Target: x86_64-unknown-linux-gnu
Thread model: posix
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/4.6.3
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
$
$ clang-trunk -Os -c small.c
$ clang-3.3 -O2 -c small.c
$
$ clang-trunk -O2 -c small.c
clang: /tmp/llvm/lib/Analysis/ScalarEvolution.cpp:2274: const llvm::SCEV
*llvm::ScalarEvolution::getAddRecExpr(SmallVectorImpl<const llvm::SCEV *> &,
const llvm::Loop *, SCEV::NoWrapFlags): Assertion `isLoopInvariant(Operands[i],
L) && "SCEVAddRecExpr operand is not loop-invariant!"' failed.
0 clang 0x0000000002322ac5 llvm::sys::PrintStackTrace(_IO_FILE*) +
37
1 clang 0x00000000023232b3
2 libpthread.so.0 0x00007f64bd40dcb0
3 libc.so.6 0x00007f64bc22f425 gsignal + 53
4 libc.so.6 0x00007f64bc232b8b abort + 379
5 libc.so.6 0x00007f64bc2280ee
6 libc.so.6 0x00007f64bc228192
7 clang 0x0000000002121606
8 clang 0x000000000211c69f
llvm::ScalarEvolution::getTruncateExpr(llvm::SCEV const*, llvm::Type*) + 1311
9 clang 0x000000000212eee9
llvm::ScalarEvolution::createSCEV(llvm::Value*) + 6361
10 clang 0x000000000212cbc0
llvm::ScalarEvolution::getSCEV(llvm::Value*) + 544
11 clang 0x000000000205d885 llvm::simplifyUsersOfIV(llvm::PHINode*,
llvm::ScalarEvolution*, llvm::LPPassManager*,
llvm::SmallVectorImpl<llvm::WeakVH>&, llvm::IVVisitor*) + 5445
12 clang 0x0000000001ee9d94
13 clang 0x00000000020f34e0
llvm::LPPassManager::runOnFunction(llvm::Function&) + 944
14 clang 0x000000000223905a
llvm::FPPassManager::runOnFunction(llvm::Function&) + 362
15 clang 0x000000000206e28a
16 clang 0x0000000002239887
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 999
17 clang 0x00000000008615e3
clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions
const&, clang::TargetOptions const&, clang::LangOptions const&,
llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::raw_ostream*) +
6211
18 clang 0x000000000085f0f1
19 clang 0x00000000009e63b3 clang::ParseAST(clang::Sema&, bool, bool)
+ 515
20 clang 0x000000000085df4e clang::CodeGenAction::ExecuteAction() +
142
21 clang 0x00000000006c9140 clang::FrontendAction::Execute() + 112
22 clang 0x00000000006a656d
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 925
23 clang 0x000000000068d1c0
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 2880
24 clang 0x000000000068543f cc1_main(char const**, char const**, char
const*, void*) + 687
25 clang 0x000000000068b420 main + 9184
26 libc.so.6 0x00007f64bc21a76d __libc_start_main + 237
27 clang 0x00000000006850c9
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 -fmath-errno -masm-verbose -mconstructor-aliases
-munwind-tables -target-cpu x86-64 -target-linker-version 2.22
-momit-leaf-frame-pointer -coverage-file
/data2/c-hunter-results/C/trans-bugs/20131229-clang-m32-m64-O2-O3-build-test31459/small.o
-resource-dir /usr/local/clang-trunk/bin/../lib/clang/3.5 -internal-isystem
/usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.5/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir
/data2/c-hunter-results/C/trans-bugs/20131229-clang-m32-m64-O2-O3-build-test31459
-ferror-limit 19 -fmessage-length 103 -mstackrealign -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp
-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 'Loop Pass Manager' on function '@foo'
5. Running pass 'Induction Variable Simplification' on basic block
'%for.cond1.preheader'
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 3.5 (trunk 198325) (llvm/trunk 198324)
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-55cecf.c
clang: note: diagnostic msg: /tmp/small-55cecf.sh
clang: note: diagnostic msg:
********************
$
---------------------------------
int a, b, c, d;
void
foo ()
{
short e;
int f;
for (d = 0; d < 1; d++)
for (a = 0; a < 1; a++)
{
e = (a >= c) + d;
int g = f = e ^ 1;
}
if (-f < 0)
b = 0;
}
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