re PR debug/77773 (Segfault when compiling __simd64_float16_t using…

re PR debug/77773 (Segfault when compiling __simd64_float16_t using arm-none-eabi-g++ with debug information)

	PR debug/77773
	* c-pretty-print.c (simple_type_specifier): Do not dereference `t'
	if NULL.

From-SVN: r241653

gcc/c-family/ChangeLog

+2016-10-28  Aldy Hernandez  <aldyh@redhat.com>
+
+	PR debug/77773
+	* c-pretty-print.c (simple_type_specifier): Do not dereference `t'
+	if NULL.
+
 2016-10-25  Jakub Jelinek  <jakub@redhat.com>
 
 	* c-common.h (enum rid): Add RID_BUILTIN_LAUNDER.

gcc/c-family/c-pretty-print.c

@@ -344,14 +344,17 @@ c_pretty_printer::simple_type_specifier (tree t)
       else
 	{
 	  int prec = TYPE_PRECISION (t);
+	  tree common_t;
 	  if (ALL_FIXED_POINT_MODE_P (TYPE_MODE (t)))
-	    t = c_common_type_for_mode (TYPE_MODE (t), TYPE_SATURATING (t));
+	    common_t = c_common_type_for_mode (TYPE_MODE (t),
+					       TYPE_SATURATING (t));
 	  else
-	    t = c_common_type_for_mode (TYPE_MODE (t), TYPE_UNSIGNED (t));
-	  if (TYPE_NAME (t))
+	    common_t = c_common_type_for_mode (TYPE_MODE (t),
+					       TYPE_UNSIGNED (t));
+	  if (common_t && TYPE_NAME (common_t))
 	    {
-	      simple_type_specifier (t);
-	      if (TYPE_PRECISION (t) != prec)
+	      simple_type_specifier (common_t);
+	      if (TYPE_PRECISION (common_t) != prec)
 		{
 		  pp_colon (this);
 		  pp_decimal_int (this, prec);