dbgcnt.def (ivopts_loop): Add.

2019-11-08  Richard Biener  <rguenther@suse.de>

	* dbgcnt.def (ivopts_loop): Add.
	* tree-ssa-loop-ivopts.c (tree_ssa_iv_optimize): Check
	ivopts_loop before optimizing a loop.

From-SVN: r277973

gcc/ChangeLog

 2019-11-08  Richard Biener  <rguenther@suse.de>
 
+	* dbgcnt.def (ivopts_loop): Add.
+	* tree-ssa-loop-ivopts.c (tree_ssa_iv_optimize): Check
+	ivopts_loop before optimizing a loop.
+
+2019-11-08  Richard Biener  <rguenther@suse.de>
+
 	PR ipa/92409
 	* tree-inline.c (declare_return_variable): Properly handle
 	type mismatches for the return slot.

gcc/dbgcnt.def

@@ -199,3 +199,4 @@ DEBUG_COUNTER (dom_unreachable_edges)
 DEBUG_COUNTER (match)
 DEBUG_COUNTER (store_merging)
 DEBUG_COUNTER (gimple_unroll)
+DEBUG_COUNTER (ivopts_loop)

gcc/tree-ssa-loop-ivopts.c

@@ -131,6 +131,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-ssa-address.h"
 #include "builtins.h"
 #include "tree-vectorizer.h"
+#include "dbgcnt.h"
 
 /* FIXME: Expressions are expanded to RTL in this pass to determine the
    cost of different addressing modes.  This should be moved to a TBD
@@ -8043,6 +8044,9 @@ tree_ssa_iv_optimize (void)
   /* Optimize the loops starting with the innermost ones.  */
   FOR_EACH_LOOP (loop, LI_FROM_INNERMOST)
     {
+      if (!dbg_cnt (ivopts_loop))
+	continue;
+
       if (dump_file && (dump_flags & TDF_DETAILS))
 	flow_loop_dump (loop, dump_file, NULL, 1);