[llvm-bugs] [Bug 24354] New: clang crashes at -Os and above on x86_64-linux-gnu
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Tue Aug 4 21:40:01 PDT 2015
https://llvm.org/bugs/show_bug.cgi?id=24354
Bug ID: 24354
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: llvm-bugs at lists.llvm.org
Classification: Unclassified
The current clang trunk crashes when compiling the following test case on
x86_64-linux-gnu at -Os and above in both 32-bit and 64-bit modes.
This is a regression from 3.6.x.
$ clang-trunk -v
clang version 3.8.0 (trunk 243961)
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 -O1 -c small.c
$ clang-3.6 -Os -c small.c
$
$ clang-trunk -Os -c small.c
clang: /tmp/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp:2117: bool
llvm::InstCombiner::OptimizeOverflowCheck(llvm::OverflowCheckFlavor,
llvm::Value *, llvm::Value *, llvm::Instruction &, llvm::Value *&,
llvm::Constant *&): Assertion `(!OrigI.isCommutative() || !(isa<Constant>(LHS)
&& !isa<Constant>(RHS))) && "call with a constant RHS if possible!"' failed.
#0 0x2b7347d llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/clang-trunk/bin/clang+0x2b7347d)
#1 0x2b729c6 llvm::sys::RunSignalHandlers()
(/usr/local/clang-trunk/bin/clang+0x2b729c6)
#2 0x2b747d3 (/usr/local/clang-trunk/bin/clang+0x2b747d3)
#3 0x7f884980c340 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)
#4 0x7f88487a7cc9 gsignal
/build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x7f88487ab0d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0
#6 0x7f88487a0b86 __assert_fail_base
/build/buildd/eglibc-2.19/assert/assert.c:92:0
#7 0x7f88487a0c32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)
#8 0x26851ea (/usr/local/clang-trunk/bin/clang+0x26851ea)
#9 0x268bd13 (/usr/local/clang-trunk/bin/clang+0x268bd13)
#10 0x264322b (/usr/local/clang-trunk/bin/clang+0x264322b)
#11 0x2644e2b (/usr/local/clang-trunk/bin/clang+0x2644e2b)
#12 0x2646199 (/usr/local/clang-trunk/bin/clang+0x2646199)
#13 0x2ad2e54 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/local/clang-trunk/bin/clang+0x2ad2e54)
#14 0x27903a8 (/usr/local/clang-trunk/bin/clang+0x27903a8)
#15 0x2ad3575 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/usr/local/clang-trunk/bin/clang+0x2ad3575)
#16 0x97ecb3 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+0x97ecb3)
#17 0x96fd25 (/usr/local/clang-trunk/bin/clang+0x96fd25)
#18 0xb8aba3 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/clang-trunk/bin/clang+0xb8aba3)
#19 0x76992e clang::FrontendAction::Execute()
(/usr/local/clang-trunk/bin/clang+0x76992e)
#20 0x738a3c clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/clang-trunk/bin/clang+0x738a3c)
#21 0x71a90c clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/clang-trunk/bin/clang+0x71a90c)
#22 0x710fd5 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
(/usr/local/clang-trunk/bin/clang+0x710fd5)
#23 0x719055 main (/usr/local/clang-trunk/bin/clang+0x719055)
#24 0x7f8848792ec5 __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:321:0
#25 0x710a6d _start (/usr/local/clang-trunk/bin/clang+0x710a6d)
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/test/reduce/small.c -resource-dir
/usr/local/clang-trunk/bin/../lib/clang/3.8.0 -internal-isystem
/usr/local/include -internal-isystem
/usr/local/clang-trunk/bin/../lib/clang/3.8.0/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/test/reduce -ferror-limit 19 -fmessage-length 112
-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 'Combine redundant instructions' on function '@fn3'
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 3.8.0 (trunk 243961)
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-947f55.c
clang: note: diagnostic msg: /tmp/small-947f55.sh
clang: note: diagnostic msg:
********************
$
-------------------------------------------
short a;
int b, c, d;
int
fn1 (int p1, int p2)
{
return p1 + p2;
}
int
fn2 (int p1)
{
return p1;
}
void
fn3 ()
{
int e = fn2 (c || fn1 (b, 255) >= 255U);
d = e && a;
}
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