+ wi->is_lhs = false;
+ }
+ break;
+ }
+
+ return NULL_TREE;
+}
+
+static tree convert_nonlocal_reference_stmt (gimple_stmt_iterator *, bool *,
+ struct walk_stmt_info *);
+
+/* Helper for convert_nonlocal_references, rewrite all references to VAR
+ and PARM_DECLs that belong to outer functions. */
+
+static bool
+convert_nonlocal_omp_clauses (tree *pclauses, struct walk_stmt_info *wi)
+{
+ struct nesting_info *const info = (struct nesting_info *) wi->info;
+ bool need_chain = false, need_stmts = false;
+ tree clause, decl;
+ int dummy;
+ bitmap new_suppress;
+
+ new_suppress = BITMAP_GGC_ALLOC ();
+ bitmap_copy (new_suppress, info->suppress_expansion);
+
+ for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause))
+ {
+ switch (OMP_CLAUSE_CODE (clause))
+ {
+ case OMP_CLAUSE_REDUCTION:
+ if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause))
+ need_stmts = true;
+ goto do_decl_clause;
+
+ case OMP_CLAUSE_LASTPRIVATE:
+ if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause))
+ need_stmts = true;
+ goto do_decl_clause;
+
+ case OMP_CLAUSE_PRIVATE:
+ case OMP_CLAUSE_FIRSTPRIVATE:
+ case OMP_CLAUSE_COPYPRIVATE:
+ case OMP_CLAUSE_SHARED:
+ do_decl_clause:
+ decl = OMP_CLAUSE_DECL (clause);
+ if (TREE_CODE (decl) == VAR_DECL
+ && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
+ break;
+ if (decl_function_context (decl) != info->context)
+ {
+ bitmap_set_bit (new_suppress, DECL_UID (decl));
+ OMP_CLAUSE_DECL (clause) = get_nonlocal_debug_decl (info, decl);
+ need_chain = true;
+ }
+ break;
+
+ case OMP_CLAUSE_SCHEDULE:
+ if (OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (clause) == NULL)
+ break;
+ /* FALLTHRU */
+ case OMP_CLAUSE_IF:
+ case OMP_CLAUSE_NUM_THREADS:
+ wi->val_only = true;
+ wi->is_lhs = false;
+ convert_nonlocal_reference_op (&OMP_CLAUSE_OPERAND (clause, 0),
+ &dummy, wi);
+ break;
+
+ case OMP_CLAUSE_NOWAIT:
+ case OMP_CLAUSE_ORDERED:
+ case OMP_CLAUSE_DEFAULT:
+ case OMP_CLAUSE_COPYIN:
+ case OMP_CLAUSE_COLLAPSE:
+ case OMP_CLAUSE_UNTIED:
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ }
+
+ info->suppress_expansion = new_suppress;
+
+ if (need_stmts)
+ for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause))
+ switch (OMP_CLAUSE_CODE (clause))
+ {
+ case OMP_CLAUSE_REDUCTION:
+ if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause))
+ {
+ tree old_context
+ = DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause));
+ DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause))
+ = info->context;
+ walk_body (convert_nonlocal_reference_stmt,
+ convert_nonlocal_reference_op, info,
+ OMP_CLAUSE_REDUCTION_GIMPLE_INIT (clause));
+ walk_body (convert_nonlocal_reference_stmt,
+ convert_nonlocal_reference_op, info,
+ OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (clause));
+ DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause))
+ = old_context;
+ }
+ break;
+
+ case OMP_CLAUSE_LASTPRIVATE:
+ walk_body (convert_nonlocal_reference_stmt,
+ convert_nonlocal_reference_op, info,
+ OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause));
+ break;
+
+ default:
+ break;
+ }
+
+ return need_chain;
+}
+
+/* Create nonlocal debug decls for nonlocal VLA array bounds. */
+
+static void
+note_nonlocal_vla_type (struct nesting_info *info, tree type)
+{
+ while (POINTER_TYPE_P (type) && !TYPE_NAME (type))
+ type = TREE_TYPE (type);
+
+ if (TYPE_NAME (type)
+ && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
+ && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
+ type = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
+
+ while (POINTER_TYPE_P (type)
+ || TREE_CODE (type) == VECTOR_TYPE
+ || TREE_CODE (type) == FUNCTION_TYPE
+ || TREE_CODE (type) == METHOD_TYPE)
+ type = TREE_TYPE (type);
+
+ if (TREE_CODE (type) == ARRAY_TYPE)
+ {
+ tree domain, t;
+
+ note_nonlocal_vla_type (info, TREE_TYPE (type));
+ domain = TYPE_DOMAIN (type);
+ if (domain)
+ {
+ t = TYPE_MIN_VALUE (domain);
+ if (t && (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == PARM_DECL)
+ && decl_function_context (t) != info->context)
+ get_nonlocal_debug_decl (info, t);
+ t = TYPE_MAX_VALUE (domain);
+ if (t && (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == PARM_DECL)
+ && decl_function_context (t) != info->context)
+ get_nonlocal_debug_decl (info, t);
+ }
+ }
+}
+
+/* Create nonlocal debug decls for nonlocal VLA array bounds for VLAs
+ in BLOCK. */
+
+static void
+note_nonlocal_block_vlas (struct nesting_info *info, tree block)
+{
+ tree var;
+
+ for (var = BLOCK_VARS (block); var; var = TREE_CHAIN (var))
+ if (TREE_CODE (var) == VAR_DECL
+ && variably_modified_type_p (TREE_TYPE (var), NULL)
+ && DECL_HAS_VALUE_EXPR_P (var)
+ && decl_function_context (var) != info->context)
+ note_nonlocal_vla_type (info, TREE_TYPE (var));
+}
+
+/* Callback for walk_gimple_stmt. Rewrite all references to VAR and
+ PARM_DECLs that belong to outer functions. This handles statements
+ that are not handled via the standard recursion done in
+ walk_gimple_stmt. STMT is the statement to examine, DATA is as in
+ convert_nonlocal_reference_op. Set *HANDLED_OPS_P to true if all the
+ operands of STMT have been handled by this function. */
+
+static tree
+convert_nonlocal_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p,
+ struct walk_stmt_info *wi)
+{
+ struct nesting_info *info = (struct nesting_info *) wi->info;
+ tree save_local_var_chain;
+ bitmap save_suppress;
+ gimple stmt = gsi_stmt (*gsi);
+
+ switch (gimple_code (stmt))
+ {
+ case GIMPLE_GOTO:
+ /* Don't walk non-local gotos for now. */
+ if (TREE_CODE (gimple_goto_dest (stmt)) != LABEL_DECL)
+ {
+ wi->val_only = true;
+ wi->is_lhs = false;
+ *handled_ops_p = true;
+ return NULL_TREE;
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