re PR debug/89704 (ICE in add_const_value_attribute, at dwarf2out.c:19685)

	PR debug/89704
	* dwarf2out.c (add_const_value_attribute): Return false for MINUS,
	SIGN_EXTEND and ZERO_EXTEND.

	* gcc.dg/debug/pr89704.c: New test.

From-SVN: r269700

gcc/ChangeLog

+2019-03-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/89704
+	* dwarf2out.c (add_const_value_attribute): Return false for MINUS,
+	SIGN_EXTEND and ZERO_EXTEND.
+
 2019-03-14  Jason Merrill  <jason@redhat.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/dwarf2out.c

@@ -19670,6 +19670,9 @@ add_const_value_attribute (dw_die_ref die, rtx rtl)
 
     case HIGH:
     case CONST_FIXED:
+    case MINUS:
+    case SIGN_EXTEND:
+    case ZERO_EXTEND:
       return false;
 
     case MEM:

gcc/testsuite/ChangeLog

+2019-03-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/89704
+	* gcc.dg/debug/pr89704.c: New test.
+
 2019-03-15  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/89650

gcc/testsuite/gcc.dg/debug/pr89704.c

+/* PR debug/89704 */
+/* { dg-do compile } */
+
+typedef __INTPTR_TYPE__ intptr_t;
+
+int
+foo (void)
+{
+  lab1:;
+  lab2:;
+  static int i = (intptr_t) &&lab1 - (intptr_t) &&lab2;
+  static int j = (intptr_t) &&lab1 - (intptr_t) &&lab2;
+  return i;
+}