re PR target/55487 (ICE in mark_jump_label_1, at jump.c:1134 compiling…

re PR target/55487 (ICE in mark_jump_label_1, at jump.c:1134 compiling gcc.c-torture/execute/pr51447.c at -O2 and above)

	PR target/55487
	* config/pa/pa.c (legitimize_pic_address): Before incrementing label
	nuses, make sure we have a label.

From-SVN: r197541

gcc/ChangeLog

+2013-04-06  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	PR target/55487
+	* config/pa/pa.c (legitimize_pic_address): Before incrementing label
+	nuses, make sure we have a label.
+
 2013-04-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	PR target/56843

gcc/config/pa/pa.c

@@ -792,7 +792,9 @@ legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
 	  /* Extract CODE_LABEL.  */
 	  orig = XEXP (orig, 0);
 	  add_reg_note (insn, REG_LABEL_OPERAND, orig);
-	  LABEL_NUSES (orig)++;
+	  /* Make sure we have label and not a note.  */
+	  if (LABEL_P (orig))
+	    LABEL_NUSES (orig)++;
 	}
       crtl->uses_pic_offset_table = 1;
       return reg;