[Bug tree-optimization/114635] OpenMP reductions fail dependency analysis

["kugan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114635

--- Comment #18 from kugan at gcc dot gnu.org ---
Also, can we set INT_MAX when there is no explicit safelen specified in OMP.
Something like:

--- a/gcc/omp-low.cc
+++ b/gcc/omp-low.cc
@@ -6975,14 +6975,11 @@ lower_rec_input_clauses (tree clauses, gimple_seq
*ilist, gimple_seq *dlist,
     {
       tree c = omp_find_clause (gimple_omp_for_clauses (ctx->stmt),
                                OMP_CLAUSE_SAFELEN);
-      poly_uint64 safe_len;
-      if (c == NULL_TREE
-         || (poly_int_tree_p (OMP_CLAUSE_SAFELEN_EXPR (c), &safe_len)
-             && maybe_gt (safe_len, sctx.max_vf)))
+      if (c == NULL_TREE)
        {
          c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_SAFELEN);
          OMP_CLAUSE_SAFELEN_EXPR (c) = build_int_cst (integer_type_node,
-                                                      sctx.max_vf);
+                                                      INT_MAX);
          OMP_CLAUSE_CHAIN (c) = gimple_omp_for_clauses (ctx->stmt);
          gimple_omp_for_set_clauses (ctx->stmt, c);
        }