[llvm-bugs] [Bug 35391] New: clang crashes with "-mllvm -enable-newgvn":Assertion `i_nocapture < OperandTraits<PHINode>::operands(this) && "getOperand() out of range!"' failed.
via llvm-bugs
llvm-bugs at lists.llvm.org
Wed Nov 22 20:34:47 PST 2017
https://bugs.llvm.org/show_bug.cgi?id=35391
Bug ID: 35391
Summary: clang crashes with "-mllvm -enable-newgvn":Assertion
`i_nocapture < OperandTraits<PHINode>::operands(this)
&& "getOperand() out of range!"' failed.
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: unassignedclangbugs at nondot.org
Reporter: helloqirun at gmail.com
CC: llvm-bugs at lists.llvm.org
It happens only with newgvn enabled.
$ clang-trunk -v
clang version 6.0.0 (trunk 318826)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
$ clang-trunk -mllvm -enable-newgvn -Os abc.c
abc.c:7:3: warning: expression result unused [-Wunused-value]
(b = a = p1) ?: (p1 /= 2);
^~~~~~~~~~~~~~~~~~~~~~~~~
abc.c:16:15: warning: incompatible pointer types assigning to 'char *' from
'short *' [-Wincompatible-pointer-types]
short g = f = &g;
^ ~~
abc.c:16:9: warning: incompatible pointer to integer conversion initializing
'short' with an expression of type 'char *'
[-Wint-conversion]
short g = f = &g;
^ ~~~~~~
clang-6.0: /home/absozero/trunk/llvm/include/llvm/IR/Instructions.h:2790:
llvm::Value* llvm::PHINode::getOperand(unsigned int) const: Assertion
`i_nocapture < OperandTraits<PHINode>::operands(this) && "getOperand() out of
range!"' failed.
#0 0x000000000210f8ca llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x210f8ca)
#1 0x000000000210d76e llvm::sys::RunSignalHandlers()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x210d76e)
#2 0x000000000210d8c2 SignalHandler(int)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x210d8c2)
#3 0x00007f31898c6330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007f3188443c37 gsignal
/build/eglibc-oGUzwX/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007f3188447028 abort
/build/eglibc-oGUzwX/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007f318843cbf6 __assert_fail_base
/build/eglibc-oGUzwX/eglibc-2.19/assert/assert.c:92:0
#7 0x00007f318843cca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x000000000177a06f (/home/absozero/trunk/root-clang/bin/clang-6.0+0x177a06f)
#9 0x0000000001da5824 llvm::InstCombiner::visitPHINode(llvm::PHINode&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1da5824)
#10 0x0000000001d4419c llvm::InstCombiner::run()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1d4419c)
#11 0x0000000001d4602f combineInstructionsOverFunction(llvm::Function&,
llvm::InstCombineWorklist&, llvm::AAResults*, llvm::AssumptionCache&,
llvm::TargetLibraryInfo&, llvm::DominatorTree&,
llvm::OptimizationRemarkEmitter&, bool, llvm::LoopInfo*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1d4602f)
#12 0x0000000001d469b9
llvm::InstructionCombiningPass::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1d469b9)
#13 0x0000000001c2e143 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1c2e143)
#14 0x00000000016b03ee (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x16b03ee)
#15 0x0000000001c2dcdd llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x1c2dcdd)
#16 0x00000000022c6aa6 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout
const&, llvm::Module*, clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x22c6aa6)
#17 0x0000000002af4c97
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2af4c97)
#18 0x0000000002cd5858 clang::ParseAST(clang::Sema&, bool, bool)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2cd5858)
#19 0x0000000002af404c clang::CodeGenAction::ExecuteAction()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2af404c)
#20 0x000000000267fece clang::FrontendAction::Execute()
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x267fece)
#21 0x000000000264f226
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x264f226)
#22 0x0000000002712fb3
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x2712fb3)
#23 0x0000000000a5a7c8 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/absozero/trunk/root-clang/bin/clang-6.0+0xa5a7c8)
#24 0x00000000009d5bf5 main
(/home/absozero/trunk/root-clang/bin/clang-6.0+0x9d5bf5)
#25 0x00007f318842ef45 __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:321:0
#26 0x0000000000a56cd9 _start
(/home/absozero/trunk/root-clang/bin/clang-6.0+0xa56cd9)
Stack dump:
0. Program arguments: /home/absozero/trunk/root-clang/bin/clang-6.0 -cc1
-triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name abc.c
-mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -resource-dir
/home/absozero/trunk/root-clang/lib/clang/6.0.0 -internal-isystem
/usr/local/include -internal-isystem
/home/absozero/trunk/root-clang/lib/clang/6.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -Os
-fdebug-compilation-dir /home/absozero/projects/reduction/crash -ferror-limit
19 -fmessage-length 128 -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -enable-newgvn -o
/tmp/abc-6f1319.o -x c abc.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'CallGraph Pass Manager' on module 'abc.c'.
4. Running pass 'Combine redundant instructions' on function '@fn2'
clang-6.0: error: unable to execute command: Aborted (core dumped)
clang-6.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 6.0.0 (trunk 318826)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-6.0: 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-6.0: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-6.0: note: diagnostic msg: /tmp/abc-f9b55c.c
clang-6.0: note: diagnostic msg: /tmp/abc-f9b55c.sh
clang-6.0: note: diagnostic msg:
********************
$ cat abc.c
char a;
int b, c;
long d;
long *e;
void fn1(int p1) {
l1:
(b = a = p1) ?: (p1 /= 2);
for (; p1 <= 0;)
for (; c;)
for (; p1;)
goto l1;
}
void fn2() {
fn1(0);
char *f;
short g = f = &g;
d = 0;
e = &d;
for (;;) {
a = *e ? 0 : (g = 28);
*f = (a && d) == 0;
*e ^= 5;
}
}
int main() {}
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