39 lines
1.3 KiB
ReStructuredText
39 lines
1.3 KiB
ReStructuredText
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.. _omp180:
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Replacing OpenMP runtime call <call> with <value>.
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====================================================================
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This optimization remark indicates that analysis determined an OpenMP runtime
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calls can be replaced with a constant value. This can occur when an OpenMP
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runtime call that queried some internal state was found to always return a
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single value after analysis.
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Example
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-------
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This optimization will trigger for most target regions to simplify the runtime
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once certain constants are known. This will trigger for internal runtime
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functions so it requires enabling verbose remarks with
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`-openmp-opt-verbose-remarks` (prefixed with `-mllvm` for use with clang).
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.. code-block:: c++
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void foo() {
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#pragma omp target parallel
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{ }
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}
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.. code-block:: console
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$ clang test.c -fopenmp -fopenmp-targets=nvptx64 -O1 -Rpass=openmp-opt \
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-mllvm -openmp-opt-verbose-remarks
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remark: Replacing runtime call __kmpc_is_spmd_exec_mode with 1. [OMP180] [-Rpass=openmp-opt]
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remark: Replacing runtime call __kmpc_is_spmd_exec_mode with 1. [OMP180] [-Rpass=openmp-opt]
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remark: Replacing runtime call __kmpc_parallel_level with 1. [OMP180] [-Rpass=openmp-opt]
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remark: Replacing runtime call __kmpc_parallel_level with 1. [OMP180] [-Rpass=openmp-opt]
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Diagnostic Scope
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----------------
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OpenMP optimization remark.
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