re PR middle-end/83977 (ICE in simd_clone_clauses_extract, at omp-simd-clone.c:184)

re PR middle-end/83977 (ICE in simd_clone_clauses_extract, at omp-simd-clone.c:184)

	PR middle-end/83977
	* tree.c (free_lang_data_in_decl): Don't clear DECL_ABSTRACT_ORIGIN
	here.
	* omp-low.c (create_omp_child_function): Remove "omp declare simd"
	attributes from DECL_ATTRIBUTES (decl) without affecting
	DECL_ATTRIBUTES (current_function_decl).
	* omp-simd-clone.c (expand_simd_clones): Ignore DECL_ARTIFICIAL
	functions with non-NULL DECL_ABSTRACT_ORIGIN.

	* c-c++-common/gomp/pr83977-1.c: New test.
	* c-c++-common/gomp/pr83977-2.c: New test.
	* c-c++-common/gomp/pr83977-3.c: New test.
	* gfortran.dg/gomp/pr83977.f90: New test.

From-SVN: r257023