[flang-commits] [flang] [Flang][OpenMP] Add Semantics support for Nested OpenMPLoopConstructs (PR #145917)

[via flang-commits]

ronlieb wrote:

seeing random 5 out of 30 compilations fail 

"flang" "-fc1" "-triple" "x86_64-unknown-linux-gnu" "-emit-llvm-bc" "-mrelocation-model" "static" "-ffast-math" "-target-cpu" "x86-64" "-floop-interchange" "-vectorize-loops" "-vectorize-slp" "-fversion-loops-for-stride" "-fopenmp" "-fopenmp-targets=amdgcn-amd-amdhsa" "-mframe-pointer=none" "-O3" "-x" "f95" "update_halo_kernel-gfx90a-8cde79"



#4 0x000014937e341abe Fortran::semantics::CanonicalizationOfOmp::RewriteOpenMPLoopConstruct(Fortran::parser::OpenMPLoopConstruct&, std
::__cxx11::list<Fortran::parser::ExecutionPartConstruct, std::allocator<Fortran::parser::ExecutionPartConstruct>>&, std::_List_iterator
<Fortran::parser::ExecutionPartConstruct>) (/mnt/COD/2025-07-06/trunk_21.0-0/bin/../lib/../lib/libFortranSemantics.so.21.0git+0x1a8abe)
 #5 0x000014937e342040 Fortran::semantics::CanonicalizationOfOmp::Post(std::__cxx11::list<Fortran::parser::ExecutionPartConstruct, std:
:allocator<Fortran::parser::ExecutionPartConstruct>>&) (/mnt/COD/2025-07-06/trunk_21.0-0/bin/../lib/../lib/libFortranSemantics.so.21.0g
it+0x1a9040)
 #6 0x000014937e35151d void Fortran::parser::detail::ParseTreeVisitorLookupScope::Walk<Fortran::semantics::CanonicalizationOfOmp>(std::
__cxx11::list<Fortran::parser::ExecutionPartConstruct, std::allocator<Fortran::parser::ExecutionPartConstruct>>&, Fortran::semantics::C
anonicalizationOfOmp&) (/mnt/COD/2025-07-06/trunk_21.0-0/bin/../lib/../lib/libFortranSemantics.so.21.0git+0x1b851d)
 #7 0x000014937e35151d void Fortran::parser::detail::ParseTreeVisitorLookupScope::Walk<Fortran::semantics::CanonicalizationOfOmp>(std::
__cxx11::list<Fortran::parser::ExecutionPartConstruct, std::allocator<Fortran::parser::ExecutionPartConstruct>>&, Fortran::semantics::C
anonicalizationOfOmp&) (/mnt/COD/2025-07-06/trunk_21.0-0/bin/../lib/../lib/libFortranSemantics.so.21.0git+0x1b851d)




https://github.com/llvm/llvm-project/pull/145917