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# 16 Mar 2026
# This is on top of
# https://github.com/kashyapc/llvm-project/commit/86e20a7c0f04

$ git describe
llvmorg-23-init-7562-g4e009a357be5

# Build with debug ("RelWithDebInfo")
$ cmake -G Ninja -S llvm -B build \
  -DLLVM_ENABLE_PROJECTS="mlir" \
  -DLLVM_TARGETS_TO_BUILD="RISCV" \
  -DCMAKE_BUILD_TYPE=RelWithDebInfo \
  -DLLVM_ENABLE_ASSERTIONS=ON \
  -DLLVM_USE_LINKER=lld \
  -DCMAKE_C_COMPILER=clang \
  -DCMAKE_CXX_COMPILER=clang++
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$ ninja -C build tools/mlir/unittests/ExecutionEngine/MLIRExecutionEngineTests
-----------------------------------------------------------------------
$ gdb --args ./build/tools/mlir/unittests/ExecutionEngine/MLIRExecutionEngineTests --gtest_filter=NativeMemRefJit.ZeroRankMemref

Starting program: /home/fedora/src/upstream/llvm-project/build/tools/mlir/unittests/ExecutionEngine/MLIRExecutionEngineTests --gtest_filter=NativeMemRefJit.ZeroRankMemref

This GDB supports auto-downloading debuginfo from the following URLs:
  <https://debuginfod.fedoraproject.org/>
Debuginfod has been enabled.
To make this setting permanent, add 'set debuginfod enabled on' to .gdbinit.
Function(s) ^std::(move|forward|as_const|(__)?addressof) will be skipped when stepping.
Function(s) ^std::(shared|unique)_ptr<.*>::(get|operator) will be skipped when stepping.
Function(s) ^std::(basic_string|vector|array|deque|(forward_)?list|(unordered_|flat_)?(multi)?(map|set)|span)<.*>::(c?r?(begin|end)|front|back|data|size|empty) will be skipped when stepping.
Function(s) ^std::(basic_string|vector|array|deque|span)<.*>::operator.] will be skipped when stepping.
Python Exception <class 'ModuleNotFoundError'>: No module named 'libstdcxx'
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/lp64d/libthread_db.so.1".
[New Thread 0x7ffff7a7bee0 (LWP 331820)]
[New Thread 0x7ffff727aee0 (LWP 331821)]

Thread 1 "MLIRExecutionEn" received signal SIGSEGV, Segmentation fault.
0x00008000022fb404 in ?? ()
Missing rpms, try: dnf --enablerepo='*debug*' install glibc-debuginfo-2.41-9.fc42.riscv64 zlib-ng-compat-debuginfo-2.2.4-1.fc42.riscv64 libzstd-debuginfo-1.5.7-1.fc42.riscv64 libstdc++-debuginfo-15.1.1-1.fc42.riscv64 libgcc-debuginfo-15.1.1-1.fc42.riscv64

Thread 3 (Thread 0x7ffff727aee0 (LWP 331821) "llvm-worker-1"):
#0  0x00007ffff7ad3418 in __syscall_cancel_arch () from /lib64/lp64d/libc.so.6
No symbol table info available.
#1  0x00007ffff7ac9448 in __internal_syscall_cancel () from /lib64/lp64d/libc.so.6
No symbol table info available.
#2  0x00007ffff7ac96f2 in __futex_abstimed_wait_cancelable64 () from /lib64/lp64d/libc.so.6
No symbol table info available.
#3  0x00007ffff7acb646 in pthread_cond_wait@@GLIBC_2.27 () from /lib64/lp64d/libc.so.6
No symbol table info available.
#4  0x00007ffff7c27258 in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /lib64/lp64d/libstdc++.so.6
No symbol table info available.
#5  0x00000000059c0f06 in std::condition_variable::wait<llvm::StdThreadPool::processTasks(llvm::ThreadPoolTaskGroup*)::$_0>(std::unique_lock<std::mutex>&, llvm::StdThreadPool::processTasks(llvm::ThreadPoolTaskGroup*)::$_0) (this=0x5bfb028, __lock=..., __p=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/condition_variable:107
No locals.
#6  llvm::StdThreadPool::processTasks (this=0x5bfaf50, WaitingForGroup=0x0) at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:82
        LockGuard = {_M_device = 0x5bfb000, _M_owns = true}
        workCompletedForGroup = false
        Task = {<llvm::detail::UniqueFunctionBase<void>> = {static InlineStorageSize = 24, static InlineStorageAlign = 8, StorageUnion = {OutOfLineStorage = {StoragePtr = 0xadadadadadadadad, Size = 12514849900987264429, Alignment = 12514849900987264429}, InlineStorage = {173 <repeats 24 times>}}, CallbackAndInlineFlag = {Value = {Data = "\000\000\000\000\000\000\000"}}}, <No data fields>}
        GroupOfTask = 0x7fffffffdb28
        Notify = <optimized out>
        NotifyGroup = <optimized out>
#7  0x00000000059c245a in llvm::StdThreadPool::grow(int)::$_0::operator()() const (this=0x5c5cb20) at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:62
No locals.
#8  llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}::operator()<llvm::StdThreadPool::grow(int)::$_0&>(llvm::StdThreadPool::grow(int)::$_0&) const (F=..., this=<optimized out>) at /home/fedora/src/upstream/llvm-project/llvm/include/llvm/Support/thread.h:46
No locals.
#9  std::__invoke_impl<void, llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, llvm::StdThreadPool::grow(int)::$_0&>(std::__invoke_other, llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, llvm::StdThreadPool::grow(int)::$_0&) (__args=..., __f=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/bits/invoke.h:63
No locals.
#10 std::__invoke<llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, llvm::StdThreadPool::grow(int)::$_0&>(llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, llvm::StdThreadPool::grow(int)::$_0&) (__args=..., __fn=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/bits/invoke.h:98
No locals.
#11 std::__apply_impl<llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&, 0ul>(llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&, std::integer_sequence<unsigned long, 0ul>) (__t=..., __f=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/tuple:2920
No locals.
#12 std::apply<llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&>(llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&) (__t=..., __f=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/tuple:2935
No locals.
#13 llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> > (Ptr=0x5c5cb20) at /home/fedora/src/upstream/llvm-project/llvm/include/llvm/Support/thread.h:44
        Callee = {_M_t = {<std::__uniq_ptr_impl<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)>, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> > >> = {_M_t = {<std::_Tuple_impl<0UL, std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> *, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> > >> = {<std::_Tuple_impl<1UL, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> > >> = {<std::_Head_base<1UL, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> >, true>> = {_M_head_impl = {<No data fields>}}, <No data fields>}, <std::_Head_base<0UL, std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> *, false>> = {_M_head_impl = 0x5c5cb20}, <No data fields>}, <No data fields>}}, <No data fields>}}
#14 llvm::thread::ThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> > (Ptr=0x5c5cb20) at /home/fedora/src/upstream/llvm-project/llvm/include/llvm/Support/thread.h:62
No locals.
#15 0x00007ffff7acbe0a in start_thread () from /lib64/lp64d/libc.so.6
No symbol table info available.
#16 0x00007ffff7b22744 in __thread_start_clone3 () from /lib64/lp64d/libc.so.6
No symbol table info available.

Thread 2 (Thread 0x7ffff7a7bee0 (LWP 331820) "llvm-worker-0"):
#0  0x00007ffff7ad3418 in __syscall_cancel_arch () from /lib64/lp64d/libc.so.6
No symbol table info available.
#1  0x00007ffff7ac9448 in __internal_syscall_cancel () from /lib64/lp64d/libc.so.6
No symbol table info available.
#2  0x00007ffff7ac96f2 in __futex_abstimed_wait_cancelable64 () from /lib64/lp64d/libc.so.6
No symbol table info available.
#3  0x00007ffff7acb646 in pthread_cond_wait@@GLIBC_2.27 () from /lib64/lp64d/libc.so.6
No symbol table info available.
#4  0x00007ffff7c27258 in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /lib64/lp64d/libstdc++.so.6
No symbol table info available.
#5  0x00000000059c0f06 in std::condition_variable::wait<llvm::StdThreadPool::processTasks(llvm::ThreadPoolTaskGroup*)::$_0>(std::unique_lock<std::mutex>&, llvm::StdThreadPool::processTasks(llvm::ThreadPoolTaskGroup*)::$_0) (this=0x5bfb028, __lock=..., __p=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/condition_variable:107
No locals.
#6  llvm::StdThreadPool::processTasks (this=0x5bfaf50, WaitingForGroup=0x0) at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:82
        LockGuard = {_M_device = 0x5bfb000, _M_owns = true}
        workCompletedForGroup = false
        Task = {<llvm::detail::UniqueFunctionBase<void>> = {static InlineStorageSize = 24, static InlineStorageAlign = 8, StorageUnion = {OutOfLineStorage = {StoragePtr = 0xadadadadadadadad, Size = 12514849900987264429, Alignment = 12514849900987264429}, InlineStorage = {173 <repeats 24 times>}}, CallbackAndInlineFlag = {Value = {Data = "\000\000\000\000\000\000\000"}}}, <No data fields>}
        GroupOfTask = 0x7fffffffdb28
        Notify = <optimized out>
        NotifyGroup = <optimized out>
#7  0x00000000059c245a in llvm::StdThreadPool::grow(int)::$_0::operator()() const (this=0x5ca5220) at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:62
No locals.
#8  llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}::operator()<llvm::StdThreadPool::grow(int)::$_0&>(llvm::StdThreadPool::grow(int)::$_0&) const (F=..., this=<optimized out>) at /home/fedora/src/upstream/llvm-project/llvm/include/llvm/Support/thread.h:46
No locals.
#9  std::__invoke_impl<void, llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, llvm::StdThreadPool::grow(int)::$_0&>(std::__invoke_other, llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, llvm::StdThreadPool::grow(int)::$_0&) (__args=..., __f=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/bits/invoke.h:63
No locals.
#10 std::__invoke<llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, llvm::StdThreadPool::grow(int)::$_0&>(llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, llvm::StdThreadPool::grow(int)::$_0&) (__args=..., __fn=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/bits/invoke.h:98
No locals.
#11 std::__apply_impl<llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&, 0ul>(llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&, std::integer_sequence<unsigned long, 0ul>) (__t=..., __f=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/tuple:2920
No locals.
#12 std::apply<llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&>(llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> >(void*)::{lambda(auto:1&&, (auto:2&&)...)#1}&&, std::tuple<llvm::StdThreadPool::grow(int)::$_0>&) (__t=..., __f=...) at /usr/lib/gcc/riscv64-redhat-linux/15/../../../../include/c++/15/tuple:2935
No locals.
#13 llvm::thread::GenericThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> > (Ptr=0x5ca5220) at /home/fedora/src/upstream/llvm-project/llvm/include/llvm/Support/thread.h:44
        Callee = {_M_t = {<std::__uniq_ptr_impl<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)>, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> > >> = {_M_t = {<std::_Tuple_impl<0UL, std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> *, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> > >> = {<std::_Tuple_impl<1UL, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> > >> = {<std::_Head_base<1UL, std::default_delete<std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> >, true>> = {_M_head_impl = {<No data fields>}}, <No data fields>}, <std::_Head_base<0UL, std::tuple<(lambda at /home/fedora/src/upstream/llvm-project/llvm/lib/Support/ThreadPool.cpp:51:26)> *, false>> = {_M_head_impl = 0x5ca5220}, <No data fields>}, <No data fields>}}, <No data fields>}}
#14 llvm::thread::ThreadProxy<std::tuple<llvm::StdThreadPool::grow(int)::$_0> > (Ptr=0x5ca5220) at /home/fedora/src/upstream/llvm-project/llvm/include/llvm/Support/thread.h:62
No locals.
#15 0x00007ffff7acbe0a in start_thread () from /lib64/lp64d/libc.so.6
No symbol table info available.
#16 0x00007ffff7b22744 in __thread_start_clone3 () from /lib64/lp64d/libc.so.6
No symbol table info available.

Thread 1 (Thread 0x7ffff7e19020 (LWP 331817) "MLIRExecutionEn"):
#0  0x00008000022fb404 in ?? ()
No symbol table info available.
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