* doc/passes.texi: Document predictive commoning.

	* doc/invoke.texi (-fpredictive-commoning): Document.
	* opts.c (decode_options): Enable flag_predictive_commoning on -O3.
	* tree-ssa-loop-im.c (get_lsm_tmp_name): Export.  Allow
	adding indices to the generated name.
	(schedule_sm): Pass 0 to get_lsm_tmp_name.
	* tree-ssa-loop-niter.c (stmt_dominates_stmt_p): Export.
	* tree-pretty-print.c (op_symbol_1): Renamed to ...
	(op_symbol_code): ... and exported.
	(dump_omp_clause, op_symbol): Use op_symbol_code
	instead of op_symbol_1.
	* tree-pass.h (pass_predcom): Declare.
	* timevar.def (TV_PREDCOM): New timevar.
	* tree-ssa-loop.c (run_tree_predictive_commoning,
	gate_tree_predictive_commoning, pass_predcom): New.
	* tree-data-ref.c (find_data_references_in_loop): Find the
	references in dominance order.
	(canonicalize_base_object_address): Ensure that the result has
	pointer type.
	(dr_analyze_innermost): Export.
	(create_data_ref): Code to fail for references with invariant
	address moved ...
	(find_data_references_in_stmt): ... here.
	* tree-data-ref.h (dr_analyze_innermost): Declare.
	* tree-affine.c: Include tree-gimple.h and hashtab.h.
	(aff_combination_find_elt, name_expansion_hash,
	name_expansion_eq, tree_to_aff_combination_expand,
	double_int_constant_multiple_p, aff_combination_constant_multiple_p):
	New functions.
	* tree-affine.h (aff_combination_constant_multiple_p,
	tree_to_aff_combination_expand): Declare.
	* tree-predcom.c: New file.
	* common.opt (fpredictive-commoning): New option.
	* tree-flow.h (op_symbol_code, tree_predictive_commoning,
	stmt_dominates_stmt_p, get_lsm_tmp_name): Declare.
	* Makefile.in (tree-predcom.o): Add.
	(tree-affine.o): Add TREE_GIMPLE_H dependency.
	* passes.c (init_optimization_passes):  Add dceloop after
	copy propagation in loop optimizer.  Add predictive commoning
	to loop optimizer passes.

	* gcc.dg/tree-ssa/predcom-1.c: New test.
	* gcc.dg/tree-ssa/predcom-2.c: New test.
	* gcc.dg/tree-ssa/predcom-3.c: New test.
	* gcc.dg/tree-ssa/predcom-4.c: New test.
	* gcc.dg/tree-ssa/predcom-5.c: New test.
	* gcc.dg/vect/dump-tree-dceloop-pr26359.c: Test dceloop2 dumps.



git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@125030 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 36 insertions, 0 deletions

diff --git a/gcc/tree-ssa-loop.c b/gcc/tree-ssa-loop.c
index c5724cbcf86..895c9c25174 100644
--- a/gcc/tree-ssa-loop.c
+++ b/gcc/tree-ssa-loop.c
@@ -176,6 +176,42 @@ struct tree_opt_pass pass_tree_unswitch =
   0					/* letter */
 };
 
+/* Predictive commoning.  */
+
+static unsigned
+run_tree_predictive_commoning (void)
+{
+  if (!current_loops)
+    return 0;
+
+  tree_predictive_commoning ();
+  return 0;
+}
+
+static bool
+gate_tree_predictive_commoning (void)
+{
+  return flag_predictive_commoning != 0;
+}
+
+struct tree_opt_pass pass_predcom = 
+{
+  "pcom",				/* name */
+  gate_tree_predictive_commoning,	/* gate */
+  run_tree_predictive_commoning,	/* execute */
+  NULL,					/* sub */
+  NULL,					/* next */
+  0,					/* static_pass_number */
+  TV_PREDCOM,				/* tv_id */
+  PROP_cfg,				/* properties_required */
+  0,					/* properties_provided */
+  0,					/* properties_destroyed */
+  0,					/* todo_flags_start */
+  TODO_dump_func | TODO_verify_loops
+    | TODO_update_ssa_only_virtuals,	/* todo_flags_finish */
+  0					/* letter */
+};
+
 /* Loop autovectorization.  */
 
 static unsigned int