re PR gcov-profile/46266 (gcov generates data for non-existing file <built-in>)

Fix PR gcov-profile/46266

	PR gcov-profile/46266
	* lib/gcov.exp: Verify that <built-in>.gcov file is not
	considered.
	* input.h (RESERVED_LOCATION_P): New macro.
	* profile.c (branch_prob): Use RESERVED_LOCATION_P and
	instread of comparison with UNKNOWN_LOCATION.

From-SVN: r240536

gcc/ChangeLog

+2016-09-27  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/46266
+	* input.h (RESERVED_LOCATION_P): New macro.
+	* profile.c (branch_prob): Use RESERVED_LOCATION_P and
+	instread of comparison with UNKNOWN_LOCATION.
+
 2016-09-27  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/77745

gcc/input.h

@@ -61,6 +61,8 @@ extern location_t input_location;
 #define LOCATION_BLOCK(LOC) \
   ((tree) ((IS_ADHOC_LOC (LOC)) ? get_data_from_adhoc_loc (line_table, (LOC)) \
    : NULL))
+#define RESERVED_LOCATION_P(LOC) \
+  (LOCATION_LOCUS (LOC) < RESERVED_LOCATION_COUNT)
 
 /* Return a positive value if LOCATION is the locus of a token that is
    located in a system header, O otherwise. It returns 1 if LOCATION

gcc/profile.c

@@ -1042,7 +1042,7 @@ branch_prob (void)
 	       gsi_prev_nondebug (&gsi))
 	    {
 	      last = gsi_stmt (gsi);
-	      if (gimple_has_location (last))
+	      if (!RESERVED_LOCATION_P (gimple_location (last)))
 		break;
 	    }
 
@@ -1053,7 +1053,7 @@ branch_prob (void)
 	     is not computed twice.  */
 	  if (last
 	      && gimple_has_location (last)
-	      && LOCATION_LOCUS (e->goto_locus) != UNKNOWN_LOCATION
+	      && !RESERVED_LOCATION_P (e->goto_locus)
 	      && !single_succ_p (bb)
 	      && (LOCATION_FILE (e->goto_locus)
 	          != LOCATION_FILE (gimple_location (last))
@@ -1262,15 +1262,14 @@ branch_prob (void)
 	  for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
 	    {
 	      gimple *stmt = gsi_stmt (gsi);
-	      if (gimple_has_location (stmt))
+	      if (!RESERVED_LOCATION_P (gimple_location (stmt)))
 		output_location (gimple_filename (stmt), gimple_lineno (stmt),
 				 &offset, bb);
 	    }
 
 	  /* Notice GOTO expressions eliminated while constructing the CFG.  */
 	  if (single_succ_p (bb)
-	      && LOCATION_LOCUS (single_succ_edge (bb)->goto_locus)
-		 != UNKNOWN_LOCATION)
+	      && !RESERVED_LOCATION_P (single_succ_edge (bb)->goto_locus))
 	    {
 	      expanded_location curr_location
 		= expand_location (single_succ_edge (bb)->goto_locus);

gcc/testsuite/ChangeLog

+2016-09-27  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/46266
+	* lib/gcov.exp: Verify that <built-in>.gcov file is not
+	considered.
+
 2016-09-27  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/77745

gcc/testsuite/lib/gcov.exp

@@ -364,13 +364,20 @@ proc run-gcov { args } {
 	return
     }
 
+    set builtin_index [string first "File '<built-in>'" $result]
+    if { $builtin_index != -1 } {
+        fail "$testname gcov failed: <built-in>.gcov should not be created"
+        clean-gcov $testcase
+        return
+    }
+
     # Get the gcov output file after making sure it exists.
     set files [glob -nocomplain $testcase.gcov]
     if { $files == "" } {
 	if { $xfailed } {
 	    setup_xfail "*-*-*"
 	}
-        fail "$testname gcov failed: $testcase.gov does not exist"
+        fail "$testname gcov failed: $testcase.gcov does not exist"
         clean-gcov $testcase
         return
     }