2018-04-17  Jakub Jelinek  <jakub@redhat.com>

	PR debug/84637
	* dbxout.c (dbxout_int): Perform negation in unsigned int type.
	(stabstr_D): Change type of unum from unsigned int to
	unsigned HOST_WIDE_INT.  Perform negation in unsigned HOST_WIDE_INT
	type.

--- gcc/dbxout.c.jj	2018-01-18 21:11:58.613207125 +0100
+++ gcc/dbxout.c	2018-04-17 16:23:59.456993115 +0200
@@ -464,7 +464,7 @@ dbxout_int (int num)
   if (num < 0)
     {
       putc ('-', asm_out_file);
-      unum = -num;
+      unum = -(unsigned int) num;
     }
   else
     unum = num;
@@ -671,7 +671,7 @@ stabstr_D (HOST_WIDE_INT num)
 {
   char buf[64];
   char *p = buf + sizeof buf;
-  unsigned int unum;
+  unsigned HOST_WIDE_INT unum;
 
   if (num == 0)
     {
@@ -681,7 +681,7 @@ stabstr_D (HOST_WIDE_INT num)
   if (num < 0)
     {
       stabstr_C ('-');
-      unum = -num;
+      unum = -(unsigned HOST_WIDE_INT) num;
     }
   else
     unum = num;