Escape non-printable chars in strings.

	* tree-pretty-print.c (pretty_print_string): Escape non-printable
	chars in strings.
	* gcc.dg/tree-ssa/dump-3.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@243477 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 1 deletions

diff --git a/gcc/tree-pretty-print.c b/gcc/tree-pretty-print.c
index 95db7100428..5b3e23e40f7 100644
--- a/gcc/tree-pretty-print.c
+++ b/gcc/tree-pretty-print.c
@@ -3869,7 +3869,14 @@ pretty_print_string (pretty_printer *pp, const char *str)
 	  break;
 
 	default:
-	  pp_character (pp, str[0]);
+	  if (!ISPRINT (str[0]))
+	    {
+	      char buf[5];
+	      sprintf (buf, "\\x%x", (unsigned char)str[0]);
+	      pp_string (pp, buf);
+	    }
+	  else
+	    pp_character (pp, str[0]);
 	  break;
 	}
       str++;