Add dbgcnt for gimple_match and generic_match.

2019-07-03  Martin Liska  <mliska@suse.cz>

	* dbgcnt.def (DEBUG_COUNTER): Add match debug counter.
	* genmatch.c (dt_simplify::gen_1): Generate dbgcnt
	condition.
	* generic-match-head.c: Include dbgcnt.h.
	* gimple-match-head.c: Likewise.

From-SVN: r273006

gcc/ChangeLog

 2019-07-03  Martin Liska  <mliska@suse.cz>
 
+	* dbgcnt.def (DEBUG_COUNTER): Add match debug counter.
+	* genmatch.c (dt_simplify::gen_1): Generate dbgcnt
+	condition.
+	* generic-match-head.c: Include dbgcnt.h.
+	* gimple-match-head.c: Likewise.
+
+2019-07-03  Martin Liska  <mliska@suse.cz>
+
 	* gcov-counter.def (GCOV_COUNTER_V_SINGLE): Remove.
 	(GCOV_COUNTER_V_TOPN): New.
 	(GCOV_COUNTER_V_INDIR): Use _topn.

gcc/dbgcnt.def

@@ -195,3 +195,4 @@ DEBUG_COUNTER (tree_sra)
 DEBUG_COUNTER (vect_loop)
 DEBUG_COUNTER (vect_slp)
 DEBUG_COUNTER (dom_unreachable_edges)
+DEBUG_COUNTER (match)

gcc/generic-match-head.c

@@ -35,7 +35,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "case-cfn-macros.h"
 #include "gimplify.h"
 #include "optabs-tree.h"
-
+#include "dbgcnt.h"
 
 /* Routine to determine if the types T1 and T2 are effectively
    the same for GENERIC.  If T1 or T2 is not a type, the test

gcc/genmatch.c

@@ -3310,6 +3310,10 @@ dt_simplify::gen_1 (FILE *f, int indent, bool gimple, operand *result)
 	}
     }
 
+  if (s->kind == simplify::SIMPLIFY)
+    fprintf_indent (f, indent, "if (__builtin_expect (!dbg_cnt (match), 0)) return %s;\n",
+		    gimple ? "false" : "NULL_TREE");
+
   fprintf_indent (f, indent, "if (__builtin_expect (dump_file && (dump_flags & TDF_FOLDING), 0)) "
 	   "fprintf (dump_file, \"%s ",
 	   s->kind == simplify::SIMPLIFY

gcc/gimple-match-head.c

@@ -42,7 +42,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "gimplify.h"
 #include "optabs-tree.h"
 #include "tree-eh.h"
-
+#include "dbgcnt.h"
 
 /* Forward declarations of the private auto-generated matchers.
    They expect valueized operands in canonical order and do not