46 lines
1.3 KiB
ReStructuredText
46 lines
1.3 KiB
ReStructuredText
Generic-mode kernel is executed with a customized state machine that requires a fallback. [OMP132]
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==================================================================================================
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.. _omp132:
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This analysis remark indicates that a state machine rewrite occurred, but
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could not be done fully because of unknown calls to functions that may contain
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parallel regions. The state machine handles scheduling work between parallel
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worker threads on the device when operating in generic-mode. If there are
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unknown parallel regions it prevents the optimization from fully rewriting the
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state machine.
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Examples
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--------
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This will occur for any generic-mode kernel that may contain unknown parallel
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regions. This is typically coupled with the :ref:`OMP133 <omp133>` remark.
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.. code-block:: c++
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extern void setup();
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void foo() {
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#pragma omp target
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{
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setup();
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#pragma omp parallel
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{
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work();
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}
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}
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}
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.. code-block:: console
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$ clang++ -fopenmp -fopenmp-targets=nvptx64 -O2 -Rpass-analysis=openmp-opt omp132.cpp
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omp133.cpp:4:1: remark: Generic-mode kernel is executed with a customized state machine
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that requires a fallback. [OMP132]
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#pragma omp target
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^
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Diagnostic Scope
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----------------
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OpenMP target offloading analysis remark.
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