dbgcnt.def (gimple_unroll): New.

2019-11-07  Richard Biener  <rguenther@suse.de>

	* dbgcnt.def (gimple_unroll): New.
	* tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Check
	gimple_unroll debug counter before applying transform.
	(try_peel_loop): Likewise.

From-SVN: r277907

gcc/ChangeLog

+2019-11-07  Richard Biener  <rguenther@suse.de>
+
+	* dbgcnt.def (gimple_unroll): New.
+	* tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Check
+	gimple_unroll debug counter before applying transform.
+	(try_peel_loop): Likewise.
+
 2019-11-07  Kwok Cheung Yeung  <kcy@codesourcery.com>
 
 	* ira.c (setup_alloc_regs): Setup no_unit_alloc_regs for

gcc/dbgcnt.def

@@ -198,3 +198,4 @@ DEBUG_COUNTER (vect_slp)
 DEBUG_COUNTER (dom_unreachable_edges)
 DEBUG_COUNTER (match)
 DEBUG_COUNTER (store_merging)
+DEBUG_COUNTER (gimple_unroll)

gcc/tree-ssa-loop-ivcanon.c

@@ -64,6 +64,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-cfgcleanup.h"
 #include "builtins.h"
 #include "tree-ssa-sccvn.h"
+#include "dbgcnt.h"
 
 /* Specifies types of loops that may be unrolled.  */
 
@@ -884,6 +885,9 @@ try_unroll_loop_completely (class loop *loop,
 	    }
 	}
 
+      if (!dbg_cnt (gimple_unroll))
+	return false;
+
       initialize_original_copy_tables ();
       auto_sbitmap wont_exit (n_unroll + 1);
       if (exit && niter
@@ -1074,6 +1078,9 @@ try_peel_loop (class loop *loop,
       return false;
     }
 
+  if (!dbg_cnt (gimple_unroll))
+    return false;
+
   /* Duplicate possibly eliminating the exits.  */
   initialize_original_copy_tables ();
   auto_sbitmap wont_exit (npeel + 1);