2019-10-02 Kwok Cheung Yeung <kcy@codesourcery.com> gcc/fortran/ * f95-lang.c (LANG_HOOKS_OMP_IS_OPTIONAL_ARGUMENT): Define to gfc_omp_is_optional_argument. * trans-decl.c (create_function_arglist): Set GFC_DECL_OPTIONAL_ARGUMENT in the generated decl if the parameter is optional. * trans-openmp.c (gfc_omp_is_optional_argument): New. (gfc_omp_privatize_by_reference): Return true if the decl is an optional pass-by-reference argument. * trans.h (gfc_omp_is_optional_argument): New declaration. (lang_decl): Add new optional_arg field. (GFC_DECL_OPTIONAL_ARGUMENT): New macro. gcc/ * langhooks-def.h (LANG_HOOKS_OMP_IS_OPTIONAL_ARGUMENT): Default to false. (LANG_HOOKS_DECLS): Add LANG_HOOKS_OMP_IS_OPTIONAL_ARGUMENT. * langhooks.h (omp_is_optional_argument): New hook. * omp-general.c (omp_is_optional_argument): New. * omp-general.h (omp_is_optional_argument): New declaration. * omp-low.c (lower_omp_target): Create temporary for received value and take the address for new_var if the original variable was a DECL_BY_REFERENCE. Use size of referenced object when a pass-by-reference optional argument used as argument to firstprivate. From-SVN: r276444
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