diff options
Diffstat (limited to 'gcc/tree-vectorizer.h')
| -rw-r--r-- | gcc/tree-vectorizer.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h index 86f90ae..524c86c 100644 --- a/gcc/tree-vectorizer.h +++ b/gcc/tree-vectorizer.h @@ -642,6 +642,13 @@ public: about the reductions that generated them. */ hash_map<tree, vect_reusable_accumulator> reusable_accumulators; + /* The number of times that the target suggested we unroll the vector loop + in order to promote more ILP. This value will be used to re-analyze the + loop for vectorization and if successful the value will be folded into + vectorization_factor (and therefore exactly divides + vectorization_factor). */ + unsigned int suggested_unroll_factor; + /* Maximum runtime vectorization factor, or MAX_VECTORIZATION_FACTOR if there is no particular limit. */ unsigned HOST_WIDE_INT max_vectorization_factor; @@ -1465,6 +1472,7 @@ public: unsigned int epilogue_cost () const; unsigned int outside_cost () const; unsigned int total_cost () const; + unsigned int suggested_unroll_factor () const; protected: unsigned int record_stmt_cost (stmt_vec_info, vect_cost_model_location, @@ -1484,6 +1492,9 @@ protected: /* The costs of the three regions, indexed by vect_cost_model_location. */ unsigned int m_costs[3]; + /* The suggested unrolling factor determined at finish_cost. */ + unsigned int m_suggested_unroll_factor; + /* True if finish_cost has been called. */ bool m_finished; }; @@ -1496,6 +1507,7 @@ vector_costs::vector_costs (vec_info *vinfo, bool costing_for_scalar) : m_vinfo (vinfo), m_costing_for_scalar (costing_for_scalar), m_costs (), + m_suggested_unroll_factor(1), m_finished (false) { } @@ -1544,6 +1556,15 @@ vector_costs::total_cost () const return body_cost () + outside_cost (); } +/* Return the suggested unroll factor. */ + +inline unsigned int +vector_costs::suggested_unroll_factor () const +{ + gcc_checking_assert (m_finished); + return m_suggested_unroll_factor; +} + #define VECT_MAX_COST 1000 /* The maximum number of intermediate steps required in multi-step type @@ -1720,12 +1741,14 @@ add_stmt_cost (vector_costs *costs, stmt_info_for_cost *i) static inline void finish_cost (vector_costs *costs, const vector_costs *scalar_costs, unsigned *prologue_cost, unsigned *body_cost, - unsigned *epilogue_cost) + unsigned *epilogue_cost, unsigned *suggested_unroll_factor = NULL) { costs->finish_cost (scalar_costs); *prologue_cost = costs->prologue_cost (); *body_cost = costs->body_cost (); *epilogue_cost = costs->epilogue_cost (); + if (suggested_unroll_factor) + *suggested_unroll_factor = costs->suggested_unroll_factor (); } inline void |