Fix up mode confusion in combine_simplify_rtx.

The surrounding code was already fixed back when BImode was added.

	* combine.c (combine_simplify_rtx): In STORE_FLAG_VALUE == -1 case,
	also verify that mode is equal to the mode of op0.

From-SVN: r217089

gcc/ChangeLog

 2014-11-04  Bernd Schmidt  <bernds@codesourcery.com>
 
+	* combine.c (combine_simplify_rtx): In STORE_FLAG_VALUE == -1 case,
+	also verify that mode is equal to the mode of op0.
+
 	* bb-reorder.c (get_uncond_jump_length): Avoid using delete_insn,
 	emit into a sequence instead.
 

gcc/combine.c

@@ -5811,10 +5811,11 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest,
 	    ;
 
 	  else if (STORE_FLAG_VALUE == -1
-	      && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
-	      && op1 == const0_rtx
-	      && (num_sign_bit_copies (op0, mode)
-		  == GET_MODE_PRECISION (mode)))
+		   && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
+		   && op1 == const0_rtx
+		   && mode == GET_MODE (op0)
+		   && (num_sign_bit_copies (op0, mode)
+		       == GET_MODE_PRECISION (mode)))
 	    return gen_lowpart (mode,
 				expand_compound_operation (op0));