diff --git a/gcc/stor-layout.cc b/gcc/stor-layout.cc
index 4cf249133e9..31da2c123ab 100644
--- a/gcc/stor-layout.cc
+++ b/gcc/stor-layout.cc
@@ -2427,8 +2427,16 @@ layout_type (tree type)
 	  }
 	else
 	  {
-	    SET_TYPE_MODE (type, BLKmode);
 	    cnt = CEIL (TYPE_PRECISION (type), GET_MODE_PRECISION (limb_mode));
+	    machine_mode mode;
+	    /* Some targets use TARGET_ARRAY_MODE to select the mode they use
+	       for arrays with a specific element mode and a specific element
+	       count and we should use this mode for large bitints that are
+	       stored as such arrays.  */
+	    if (!targetm.array_mode (limb_mode, cnt).exists (&mode)
+		|| !targetm.array_mode_supported_p (limb_mode, cnt))
+	      mode = BLKmode;
+	    SET_TYPE_MODE (type, mode);
 	    gcc_assert (info.abi_limb_mode == info.limb_mode
 			|| !info.big_endian == !WORDS_BIG_ENDIAN);
 	  }