Ensure that dump calls are guarded with dump_enabled_p

If called when !dump_enabled_p, the dump_* functions effectively do
nothing, but as of r263178 this doing "nothing" involves non-trivial
work internally.

I wasn't sure whether the dump_* functions should assert that
  dump_enabled_p ()
is true when they're called, or if they should bail out immediately
for this case, so in this patch I implemented both, so that we get
an assertion failure, and otherwise bail out for the case where
!dump_enabled_p when assertions are disabled.

The patch also fixes all of the places I found during testing
(on x86_64-pc-linux-gnu) that call into dump_* but which
weren't guarded by
  if (dump_enabled_p ())

gcc/ChangeLog:
	* dumpfile.c (VERIFY_DUMP_ENABLED_P): New macro.
	(dump_gimple_stmt): Use it.
	(dump_gimple_stmt_loc): Likewise.
	(dump_gimple_expr): Likewise.
	(dump_gimple_expr_loc): Likewise.
	(dump_generic_expr): Likewise.
	(dump_generic_expr_loc): Likewise.
	(dump_printf): Likewise.
	(dump_printf_loc): Likewise.
	(dump_dec): Likewise.
	(dump_dec): Likewise.
	(dump_hex): Likewise.
	(dump_symtab_node): Likewise.

gcc/ChangeLog:
	* gimple-loop-interchange.cc (tree_loop_interchange::interchange):
	Guard dump call with dump_enabled_p.
	* graphite-isl-ast-to-gimple.c (graphite_regenerate_ast_isl): Likewise.
	* graphite-optimize-isl.c (optimize_isl): Likewise.
	* graphite.c (graphite_transform_loops): Likewise.
	* tree-loop-distribution.c (pass_loop_distribution::execute): Likewise.
	* tree-parloops.c (parallelize_loops): Likewise.
	* tree-ssa-loop-niter.c (number_of_iterations_exit): Likewise.
	* tree-vect-data-refs.c (vect_analyze_group_access_1): Likewise.
	(vect_prune_runtime_alias_test_list): Likewise.
	* tree-vect-loop.c (vect_update_vf_for_slp): Likewise.
	(vect_estimate_min_profitable_iters): Likewise.
	* tree-vect-slp.c (vect_record_max_nunits): Likewise.
	(vect_build_slp_tree_2): Likewise.
	(vect_supported_load_permutation_p): Likewise.
	(vect_slp_analyze_operations): Likewise.
	(vect_slp_analyze_bb_1): Likewise.
	(vect_slp_bb): Likewise.
	* tree-vect-stmts.c (vect_analyze_stmt): Likewise.
	* tree-vectorizer.c (try_vectorize_loop_1): Likewise.
	(pass_slp_vectorize::execute): Likewise.
	(increase_alignment): Likewise.

From-SVN: r266080

1 files changed, 16 insertions, 10 deletions

diff --git a/gcc/tree-vectorizer.c b/gcc/tree-vectorizer.c
index 12bf0fcd5bd..0a4eca51ad7 100644
--- a/gcc/tree-vectorizer.c
+++ b/gcc/tree-vectorizer.c
@@ -925,8 +925,9 @@ try_vectorize_loop_1 (hash_table<simduid_to_vf> *&simduid_to_vf_htab,
 	    }
 	  if (!require_loop_vectorize && vect_slp_bb (bb))
 	    {
-	      dump_printf_loc (MSG_NOTE, vect_location,
-			       "basic block vectorized\n");
+	      if (dump_enabled_p ())
+		dump_printf_loc (MSG_NOTE, vect_location,
+				 "basic block vectorized\n");
 	      fold_loop_internal_call (loop_vectorized_call,
 				       boolean_true_node);
 	      loop_vectorized_call = NULL;
@@ -955,12 +956,15 @@ try_vectorize_loop_1 (hash_table<simduid_to_vf> *&simduid_to_vf_htab,
     set_uid_loop_bbs (loop_vinfo, loop_vectorized_call);
 
   unsigned HOST_WIDE_INT bytes;
-  if (current_vector_size.is_constant (&bytes))
-    dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, vect_location,
-		     "loop vectorized using %wu byte vectors\n", bytes);
-  else
-    dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, vect_location,
-		     "loop vectorized using variable length vectors\n");
+  if (dump_enabled_p ())
+    {
+      if (current_vector_size.is_constant (&bytes))
+	dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, vect_location,
+			 "loop vectorized using %wu byte vectors\n", bytes);
+      else
+	dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, vect_location,
+			 "loop vectorized using variable length vectors\n");
+    }
 
   loop_p new_loop = vect_transform_loop (loop_vinfo);
   (*num_vectorized_loops)++;
@@ -1289,7 +1293,8 @@ pass_slp_vectorize::execute (function *fun)
   FOR_EACH_BB_FN (bb, fun)
     {
       if (vect_slp_bb (bb))
-	dump_printf_loc (MSG_NOTE, vect_location, "basic block vectorized\n");
+	if (dump_enabled_p ())
+	  dump_printf_loc (MSG_NOTE, vect_location, "basic block vectorized\n");
     }
 
   if (!in_loop_pipeline)
@@ -1447,7 +1452,8 @@ increase_alignment (void)
       if (alignment && vect_can_force_dr_alignment_p (decl, alignment))
         {
 	  vnode->increase_alignment (alignment);
-          dump_printf (MSG_NOTE, "Increasing alignment of decl: %T\n", decl);
+	  if (dump_enabled_p ())
+	    dump_printf (MSG_NOTE, "Increasing alignment of decl: %T\n", decl);
         }
     }