Tweak code to avoid NVHPC 21.7 ICE #1385
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Replaced a code change with a more targeted CMake change. Should be good to go. |
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pramodk
approved these changes
Jul 27, 2021
| AND "${CMAKE_C_COMPILER_VERSION}" VERSION_GREATER_EQUAL 21.7) | ||
| set_source_files_properties(${PROJECT_SOURCE_DIR}/src/mesch/znorm.c PROPERTIES COMPILE_OPTIONS | ||
| -Mnovect) | ||
| endif() |
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Just for reference, see #901 : here intel compiled was causing deadlock with AVX-512.
Just an idea : as this issue is with the loop vectoriser, if writing loop in different form would avoid compiler internal error then that could be an option. Then we won't need to maintain cmake patches around.
alexsavulescu
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Jul 27, 2021
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Just as a side note, I also found out about |
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Without this change then NEURON fails to compile with the latest NVIDIA HPC compiler release, 21.7. There is an internal compiler error in
znorm.c, see https://forums.developer.nvidia.com/t/nvc-21-7-regression-internal-compiler-error-can-only-coerce-indirect-args/184847 for more information.This change disables vectorisation optimisations for that file to sidestep the error, as suggested on the NVIDIA forums.