cfglayout.c (insn_locators_alloc): Initialize curr_location and last_location to UNKNOWN_LOCATION.

	* cfglayout.c (insn_locators_alloc): Initialize curr_location and
	last_location to UNKNOWN_LOCATION.

From-SVN: r171722

gcc/ChangeLog

+2011-03-30  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* cfglayout.c (insn_locators_alloc): Initialize curr_location and
+	last_location to UNKNOWN_LOCATION.
+
 2011-03-30  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/48349

gcc/cfglayout.c

@@ -253,8 +253,8 @@ insn_locators_alloc (void)
   locations_locators_locs = VEC_alloc (int, heap, 32);
   locations_locators_vals = VEC_alloc (location_t, heap, 32);
 
-  last_location = -1;
-  curr_location = -1;
+  curr_location = UNKNOWN_LOCATION;
+  last_location = UNKNOWN_LOCATION;
   curr_block = NULL;
   last_block = NULL;
   curr_rtl_loc = 0;