i386.c (ix86_decompose_address): If operand isn't UNSPEC, return 0.

	* config/i386/i386.c (ix86_decompose_address) <case ZERO_EXTEND>:
	If operand isn't UNSPEC, return 0.

From-SVN: r185568

gcc/ChangeLog

+2012-03-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* config/i386/i386.c (ix86_decompose_address) <case ZERO_EXTEND>:
+	If operand isn't UNSPEC, return 0.
+
 2012-03-20  Richard Guenther  <rguenther@suse.de>
 
 	* tree-pass.h (pass_rtl_eh): Remove.

gcc/config/i386/i386.c

@@ -11516,6 +11516,8 @@ ix86_decompose_address (rtx addr, struct ix86_address *out)
 
 	    case ZERO_EXTEND:
 	      op = XEXP (op, 0);
+	      if (GET_CODE (op) != UNSPEC)
+		return 0;
 	      /* FALLTHRU */
 
 	    case UNSPEC: