gcc/
* coretypes.h (gimple_omp_continue): New typedef.
(const_gimple_omp_continue): New typedef.
* gimple.h (gimple_statement_base::as_a_gimple_omp_continue): New.
(gimple_build_omp_continue): Return a gimple_omp_continue rather
than a plain gimple.
(gimple_omp_continue_control_def): Require a
const_gimple_omp_continue rather than a plain const_gimple.
(gimple_omp_continue_control_use): Likewise.
(gimple_omp_continue_control_def_ptr): Require a gimple_omp_continue
rather than a plain gimple.
(gimple_omp_continue_set_control_def): Likewise.
(gimple_omp_continue_control_use_ptr): Likewise.
(gimple_omp_continue_set_control_use): Likewise.
* gimple-pretty-print.c (dump_gimple_omp_continue): Require a
gimple_omp_continue rather than a plain gimple.
(pp_gimple_stmt_1): Add a checked cast to gimple_omp_continue
within GIMPLE_OMP_CONTINUE case of switch statement.
* gimple-walk.c (walk_gimple_op): Likewise, adding a new local.
* gimple.c (gimple_build_omp_continue): Return a
gimple_omp_continue rather than a plain gimple.
* omp-low.c (gimple_build_cond_empty): Return a gimple_cond
rather than a plain gimple.
(expand_omp_for_generic): Split local "stmt" into "assign_stmt",
"cont_stmt", "cond_stmt", "call_stmt" of types gimple_assign,
gimple_omp_continue, gimple_cond, gimple_call respectively.
(expand_omp_for_static_nochunk): Likewise, splitting into two
"cond_stmt" decls. "assign_stmt", "cont_stmt"
(expand_omp_for_static_chunk): Likewise, splitting into
"cond_stmt", "assign_stmt", "cont_stmt".
(expand_omp_sections): Strengthen local "cont" from gimple to
gimple_omp_continue.