tree-parloops.c (loop_parallel_p): Call vect_is_simple_reduction with additional parameter.

	* tree-parloops.c (loop_parallel_p): Call vect_is_simple_reduction
	with additional parameter.
	* tree-vectorizer.h (enum vect_def_type): Add new value 
	vect_nested_cycle.
	(enum vect_relevant): Add comments.
	(vect_is_simple_reduction): Add new argument.
	* tree-vect-loop.c (vect_analyze_scalar_cycles_1): Add comments.
	Detect nested cycles.
	(vect_is_simple_reduction): Update documentation, add an argument to
	distinguish inner-loop reduction from nested cycle, detect nested
	cycles, fix printings and indentation, don't swap operands in case
	of nested cycle.
	(get_initial_def_for_reduction): Handle subtraction.
	(vect_create_epilog_for_reduction): Add new argument to specify
	reduction variable.
	(vect_finalize_reduction): Handle subtraction, fix comments.
	(vectorizable_reduction): Handle nested cycles. In case of nested cycle
	keep track of the reduction variable position. Call 
	vect_is_simple_reduction with additional parameter. Use original 
	statement code in reduction epilogue for nested cycle. Call
	vect_create_epilog_for_reduction with additional parameter.
	* tree-vect-patterns.c (vect_recog_dot_prod_pattern): Assert inner-loop
	vectorization.
	(vect_recog_widen_sum_pattern): Likewise.
	* tree-vect-stmts.c (process_use): Distinguish between nested cycles
	and reductions.
	(vect_mark_stmts_to_be_vectorized): Likewise.
	(vect_get_vec_def_for_operand): Handle nested cycles.

From-SVN: r148518

1 files changed, 6 insertions, 1 deletions

diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index c78e768..6e8f879 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -61,6 +61,7 @@ enum vect_def_type {
   vect_internal_def,
   vect_induction_def,
   vect_reduction_def,
+  vect_nested_cycle,
   vect_unknown_def_type
 };
 
@@ -339,7 +340,11 @@ enum stmt_vec_info_type {
    block.  */
 enum vect_relevant {
   vect_unused_in_scope = 0,
+  /* The def is in the inner loop, and the use is in the outer loop, and the
+     use is a reduction stmt.  */
   vect_used_in_outer_by_reduction,
+  /* The def is in the inner loop, and the use is in the outer loop (and is
+     not part of reduction).  */
   vect_used_in_outer,
 
   /* defs that feed computations that end up (only) in a reduction. These
@@ -817,7 +822,7 @@ extern tree vect_create_addr_base_for_vector_ref (gimple, gimple_seq *,
 /* In tree-vect-loop.c.  */
 /* FORNOW: Used in tree-parloops.c.  */
 extern void destroy_loop_vec_info (loop_vec_info, bool);
-extern gimple vect_is_simple_reduction (loop_vec_info, gimple);
+extern gimple vect_is_simple_reduction (loop_vec_info, gimple, bool);
 /* Drive for loop analysis stage.  */
 extern loop_vec_info vect_analyze_loop (struct loop *);
 /* Drive for loop transformation stage.  */