re PR bootstrap/55049 (bootstrap failed with --with-multilib-list=m32,m64,mx32)

2012-10-24  Vladimir Makarov  <vmakarov@redhat.com>

	PR bootstrap/55049
	* lra-constraints.c (extract_loc_address_regs): Pass top_p for
	ZERO_EXTEND operand.

From-SVN: r192771

gcc/ChangeLog

 2012-10-24  Vladimir Makarov  <vmakarov@redhat.com>
 
+	PR bootstrap/55049
+	* lra-constraints.c (extract_loc_address_regs): Pass top_p for
+	ZERO_EXTEND operand.
+
+2012-10-24  Vladimir Makarov  <vmakarov@redhat.com>
+
 	PR bootstrap/55048
 	* lra-constraints.c (update_ebb_live_info): Skip
 	non-NOTE_INSN_BASIC_BLOCK notes.

gcc/lra-constraints.c

@@ -515,6 +515,12 @@ extract_loc_address_regs (bool top_p, enum machine_mode mode, addr_space_t as,
     case PC:
       return;
 
+    case ZERO_EXTEND:
+      /* Pass TOP_P for displacement.  */
+      extract_loc_address_regs (top_p, mode, as, &XEXP (*loc, 0), context_p,
+				code, index_code, modify_p, ad);
+      return;
+
     case PLUS:
     case LO_SUM:
       /* When we have an address that is a sum, we must determine