MPX: Fix option handling.

2017-03-10  Martin Liska  <mliska@suse.cz>

        PR target/65705
        PR target/69804
	* toplev.c (process_options): Enable MPX with LSAN and UBSAN.
	* tree-chkp.c (chkp_walk_pointer_assignments): Verify that
	FIELD != NULL.

From-SVN: r246027

gcc/ChangeLog

+2017-03-10  Martin Liska  <mliska@suse.cz>
+
+        PR target/65705
+        PR target/69804
+	* toplev.c (process_options): Enable MPX with LSAN and UBSAN.
+	* tree-chkp.c (chkp_walk_pointer_assignments): Verify that
+	FIELD != NULL.
+
 2017-03-10  Olivier Hainque  <hainque@adacore.com>
 
 	* tree-switch-conversion (array_value_type): Start by resetting

gcc/testsuite/gcc.target/i386/pr71458.c

 /* { dg-do compile { target { ! x32 } } } */
 /* { dg-options "-fcheck-pointer-bounds -mmpx -fsanitize=bounds" } */
-/* { dg-error "-fcheck-pointer-bounds is not supported with Undefined Behavior Sanitizer" "" { target *-*-* } 0 } */
+/* { dg-error "'-fcheck-pointer-bounds' is not supported with '-fsanitize=bounds'" "" { target *-*-* } 0 } */
 
 enum {} a[0];
 void fn1(int);

gcc/toplev.c

@@ -1270,31 +1270,39 @@ process_options (void)
       if (targetm.chkp_bound_mode () == VOIDmode)
 	{
 	  error_at (UNKNOWN_LOCATION,
-		    "-fcheck-pointer-bounds is not supported for this target");
+		    "%<-fcheck-pointer-bounds%> is not supported for this "
+		    "target");
 	  flag_check_pointer_bounds = 0;
 	}
 
-      if (flag_sanitize)
+      if (flag_sanitize & SANITIZE_BOUNDS_STRICT)
 	{
-	  if (flag_sanitize & SANITIZE_ADDRESS)
-	    error_at (UNKNOWN_LOCATION,
-		      "-fcheck-pointer-bounds is not supported with "
-		      "Address Sanitizer");
-
-	  if (flag_sanitize & (SANITIZE_UNDEFINED | SANITIZE_NONDEFAULT))
-	    error_at (UNKNOWN_LOCATION,
-		      "-fcheck-pointer-bounds is not supported with "
-		      "Undefined Behavior Sanitizer");
-
-	  if (flag_sanitize & SANITIZE_LEAK)
-	    error_at (UNKNOWN_LOCATION,
-		      "-fcheck-pointer-bounds is not supported with "
-		      "Leak Sanitizer");
-
-	  if (flag_sanitize & SANITIZE_THREAD)
-	    error_at (UNKNOWN_LOCATION,
-		      "-fcheck-pointer-bounds is not supported with "
-		      "Thread Sanitizer");
+	  error_at (UNKNOWN_LOCATION,
+		    "%<-fcheck-pointer-bounds%> is not supported with "
+		    "%<-fsanitize=bounds-strict%>");
+	  flag_check_pointer_bounds = 0;
+	}
+      else if (flag_sanitize & SANITIZE_BOUNDS)
+	{
+	  error_at (UNKNOWN_LOCATION,
+		    "%<-fcheck-pointer-bounds%> is not supported with "
+		    "%<-fsanitize=bounds%>");
+	  flag_check_pointer_bounds = 0;
+	}
+
+      if (flag_sanitize & SANITIZE_ADDRESS)
+	{
+	  error_at (UNKNOWN_LOCATION,
+		    "%<-fcheck-pointer-bounds%> is not supported with "
+		    "Address Sanitizer");
+	  flag_check_pointer_bounds = 0;
+	}
+
+      if (flag_sanitize & SANITIZE_THREAD)
+	{
+	  error_at (UNKNOWN_LOCATION,
+		    "%<-fcheck-pointer-bounds%> is not supported with "
+		    "Thread Sanitizer");
 
 	  flag_check_pointer_bounds = 0;
 	}

gcc/tree-chkp.c

@@ -3803,7 +3803,7 @@ chkp_walk_pointer_assignments (tree lhs, tree rhs, void *arg,
 
 	  FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (rhs), cnt, field, val)
 	    {
-	      if (chkp_type_has_pointer (TREE_TYPE (field)))
+	      if (field && chkp_type_has_pointer (TREE_TYPE (field)))
 		{
 		  tree lhs_field = chkp_build_component_ref (lhs, field);
 		  chkp_walk_pointer_assignments (lhs_field, val, arg, handler);