* tree-vectorizer.c (new_loop_vec_info): Initialize

        LOOP_VINFO_COST_MODEL_MIN_ITERS.
        * tree-vectorizer.h (_loop_vec_info): Added new filed
        min_profitable_iters.
        (LOOP_VINFO_COST_MODEL_MIN_ITERS): New access macro to above new field.
        (TARG_SCALAR_TO_VEC_COST): Define cost of scalar to vector operation.
        * tree-vect-analyze.c (vect_analyze_operations): Set
        LOOP_VINFO_COST_MODEL_MIN_ITERS.
        * tree-vect-transform.c (vect_estimate_min_profitable_iters): Use
        VEC_length to determine if there are any LOOP_VINFO_MAY_MISALIGN_STMTS.
        Fix calculation of peel_iters_prologue. Move consideration of epilogue
        and prologue cost to after they are computed.
        (vect_model_induction_cost): Use TARG_SCALAR_TO_VEC_COST instead of
        TARG_VEC_STMT_COST.
        (vect_model_simple_cost): Takes additional argument dt. Consider cost
        of creating vectors from scalars according to dt.
        (vect_model_store_cost): Likewise.
        (vectorizable_call): Use dt array instead of scalar dt. Call
        vect_model_simple_cost with additional argument dt.
        (vectorizable_assignment): Likewise.
        (vectorizable_operation): Likewise.
        (vectorizable_type_demotion): Likewise.
        (vectorizable_type_promotion): Likewise.
        (vectorizable_store): Use dt array instead of scalar dt. Call
        vect_model_store_cost with additional argument dt.
        (vect_do_peeling_for_loop_bound): Don't call
        vect_estimate_min_profitable_iters. Instead, lookup
        LOOP_VINFO_COST_MODEL_MIN_ITERS. Don't always print
        "may not be profitable".

        * gcc.dg/vect/costmodel/ppc: New directory.
        * gcc.dg/vect/costmodel/ppc/ppc-costmodel-vect.exp: New.
        * gcc.dg/vect/costmodel/ppc/costmodel-fast-math-vect-pr29925.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-31a.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-31b.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-31c.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-31d.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-76a.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-76c.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-68a.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-68b.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-68c.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-68d.c: New test.
        * gcc.dg/vect/costmodel/ppc/costmodel-vect-reduc-1char.c: New test.
	  * gcc.dg/vect/costmodel/i386/costmodel-vect-68.c: Now vectorized.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@126368 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 0 deletions

diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index 25299944e4f..e5957ca4a3d 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -99,6 +99,13 @@ typedef struct _loop_vec_info {
   /* Number of iterations.  */
   tree num_iters;
 
+  /* Minimum number of iterations below which vectorization is expected to
+     not be profitable (as estimated by the cost model). 
+     -1 indicates that vectorization will not be profitable.
+     FORNOW: This field is an int. Will be a tree in the future, to represent
+	     values unknown at compile time.  */ 
+  int min_profitable_iters;  
+  
   /* Is the loop vectorizable? */
   bool vectorizable;
 
@@ -140,6 +147,7 @@ typedef struct _loop_vec_info {
 #define LOOP_VINFO_BBS(L)             (L)->bbs
 #define LOOP_VINFO_EXIT_COND(L)       (L)->exit_cond
 #define LOOP_VINFO_NITERS(L)          (L)->num_iters
+#define LOOP_VINFO_COST_MODEL_MIN_ITERS(L)	(L)->min_profitable_iters
 #define LOOP_VINFO_VECTORIZABLE_P(L)  (L)->vectorizable
 #define LOOP_VINFO_VECT_FACTOR(L)     (L)->vectorization_factor
 #define LOOP_VINFO_PTR_MASK(L)        (L)->ptr_mask
@@ -329,6 +337,11 @@ typedef struct _stmt_vec_info {
 #define TARG_VEC_TO_SCALAR_COST      1
 #endif
 
+/* Cost of scalar to vector operation.  */
+#ifndef TARG_SCALAR_TO_VEC_COST
+#define TARG_SCALAR_TO_VEC_COST      1
+#endif
+
 /* Cost of aligned vector load.  */
 #ifndef TARG_VEC_LOAD_COST
 #define TARG_VEC_LOAD_COST           1