[llvm-bugs] [Bug 41632] New: opt crashes with "opt -early-cse-memssa -die -gvn-hoist": Assertion `I1->getParent() == I2->getParent()' failed.
via llvm-bugs
llvm-bugs at lists.llvm.org
Sat Apr 27 21:48:49 PDT 2019
https://bugs.llvm.org/show_bug.cgi?id=41632
Bug ID: 41632
Summary: opt crashes with "opt -early-cse-memssa -die
-gvn-hoist": Assertion `I1->getParent() ==
I2->getParent()' failed.
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedbugs at nondot.org
Reporter: cszide at 163.com
CC: llvm-bugs at lists.llvm.org
Created attachment 21832
--> https://bugs.llvm.org/attachment.cgi?id=21832&action=edit
.bc file of the source code
$clang -v
clang version 9.0.0 (trunk 355281)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -mllvm -disable-llvm-optzns small.c -o small.bc
$opt -early-cse-memssa -die -gvn-hoist small.bc -o small-opt.bc
opt:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:376:
bool llvm::GVNHoist::firstInBB(const llvm::Instruction*, const
llvm::Instruction*): Assertion `I1->getParent() == I2->getParent()' failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build2/bin/opt -early-cse-memssa
-die -gvn-hoist small.bc -o small-opt.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Early GVN Hoisting of Expressions' on function '@a'
#0 0x000055c6f5d2ab7b llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Support/Unix/Signals.inc:494:0
#1 0x000055c6f5d2ac0e PrintStackTraceSignalHandler(void*)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Support/Unix/Signals.inc:558:0
#2 0x000055c6f5d28b92 llvm::sys::RunSignalHandlers()
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Support/Signals.cpp:68:0
#3 0x000055c6f5d2a59d SignalHandler(int)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Support/Unix/Signals.inc:357:0
#4 0x00007f6b7780d890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#5 0x00007f6b764bfe97 gsignal
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#6 0x00007f6b764c1801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#7 0x00007f6b764b139a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#8 0x00007f6b764b1412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#9 0x000055c6f5a092fc llvm::GVNHoist::firstInBB(llvm::Instruction const*,
llvm::Instruction const*)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:377:0
#10 0x000055c6f5a0949b llvm::GVNHoist::hasMemoryUse(llvm::Instruction const*,
llvm::MemoryDef*, llvm::BasicBlock const*)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:400:0
#11 0x000055c6f5a09810 llvm::GVNHoist::hasEHOrLoadsOnPath(llvm::Instruction
const*, llvm::MemoryDef*, int&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:468:0
#12 0x000055c6f5a09c0f llvm::GVNHoist::safeToHoistLdSt(llvm::Instruction
const*, llvm::Instruction const*, llvm::MemoryUseOrDef*,
llvm::GVNHoist::InsKind, int&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:542:0
#13 0x000055c6f5a09fc6
llvm::GVNHoist::checkSafety(llvm::iterator_range<llvm::CHIArg*>,
llvm::BasicBlock*, llvm::GVNHoist::InsKind,
llvm::SmallVectorImpl<llvm::CHIArg>&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:608:0
#14 0x000055c6f5a0ab18
llvm::GVNHoist::findHoistableCandidates(llvm::DenseMap<llvm::BasicBlock*,
llvm::SmallVector<llvm::CHIArg, 2u>, llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, llvm::SmallVector<llvm::CHIArg,
2u> > >&, llvm::GVNHoist::InsKind,
llvm::SmallVector<std::pair<llvm::BasicBlock*,
llvm::SmallVector<llvm::Instruction*, 4u> >, 4u>&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:722:0
#15 0x000055c6f5a0b485
llvm::GVNHoist::computeInsertionPoints(llvm::DenseMap<std::pair<unsigned int,
unsigned int>, llvm::SmallVector<llvm::Instruction*, 4u>,
llvm::DenseMapInfo<std::pair<unsigned int, unsigned int> >,
llvm::detail::DenseMapPair<std::pair<unsigned int, unsigned int>,
llvm::SmallVector<llvm::Instruction*, 4u> > > const&,
llvm::SmallVector<std::pair<llvm::BasicBlock*,
llvm::SmallVector<llvm::Instruction*, 4u> >, 4u>&, llvm::GVNHoist::InsKind)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:765:0
#16 0x000055c6f5a0cbeb llvm::GVNHoist::hoistExpressions(llvm::Function&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:1135:0
#17 0x000055c6f5a0902e llvm::GVNHoist::run(llvm::Function&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:284:0
#18 0x000055c6f5a0ceeb llvm::GVNHoistLegacyPass::runOnFunction(llvm::Function&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/Transforms/Scalar/GVNHoist.cpp:1160:0
#19 0x000055c6f54ab1fc llvm::FPPassManager::runOnFunction(llvm::Function&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/IR/LegacyPassManager.cpp:1643:0
#20 0x000055c6f54ab473 llvm::FPPassManager::runOnModule(llvm::Module&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/IR/LegacyPassManager.cpp:1678:0
#21 0x000055c6f54ab844 (anonymous
namespace)::MPPassManager::runOnModule(llvm::Module&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/IR/LegacyPassManager.cpp:1743:0
#22 0x000055c6f54abfd3 llvm::legacy::PassManagerImpl::run(llvm::Module&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/IR/LegacyPassManager.cpp:1856:0
#23 0x000055c6f54ac1c5 llvm::legacy::PassManager::run(llvm::Module&)
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/lib/IR/LegacyPassManager.cpp:1888:0
#24 0x000055c6f370915f main
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/tools/opt/opt.cpp:862:0
#25 0x00007f6b764a2b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#26 0x000055c6f36cacba _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build2/bin/opt+0x1808cba)
Aborted (core dumped)
By using godbolt, it shows that llvm 6/7/truck versions also have this bug.
------------------------------------
a() {
for (;;) {
int b=0;
char ***c[4][8][1];
{
char ****d = &c[1][4][0];
if (b)
continue;
*d = c[1][4][0];
}
}
}
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