diff mbox series

debug-counter for GIMPLE unrolling

Message ID nycvar.YFH.7.76.1911070835020.5566@zhemvz.fhfr.qr
State New
Headers show
Series debug-counter for GIMPLE unrolling | expand

Commit Message

Richard Biener Nov. 7, 2019, 7:35 a.m. UTC 
Helps to narrow down some bugs.

Bootstrapped / tested on x86_64-unknown-linux-gnu, applied.

Richard.

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.
diff mbox series

Patch

Index: gcc/dbgcnt.def
===================================================================
--- gcc/dbgcnt.def	(revision 277873)
+++ gcc/dbgcnt.def	(working copy)
@@ -198,3 +198,4 @@  DEBUG_COUNTER (vect_slp)
 DEBUG_COUNTER (dom_unreachable_edges)
 DEBUG_COUNTER (match)
 DEBUG_COUNTER (store_merging)
+DEBUG_COUNTER (gimple_unroll)
Index: gcc/tree-ssa-loop-ivcanon.c
===================================================================
--- gcc/tree-ssa-loop-ivcanon.c	(revision 277873)
+++ gcc/tree-ssa-loop-ivcanon.c	(working copy)
@@ -64,6 +64,7 @@  along with GCC; see the file COPYING3.
 #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 +887,9 @@  try_unroll_loop_completely (class loop *
 	    }
 	}
 
+      if (!dbg_cnt (gimple_unroll))
+	return false;
+
       initialize_original_copy_tables ();
       auto_sbitmap wont_exit (n_unroll + 1);
       if (exit && niter
@@ -1074,6 +1080,9 @@  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);