This patch adjusts a couple of cases in which we had established that two modes were equal and happened to be using the one with the more general type instead of the one with the more specific type.
2017-07-13 Richard Sandiford <[email protected]> Alan Hayward <[email protected]> David Sherwood <[email protected]> gcc/ * expr.c (expand_expr_real_2): Use word_mode instead of innermode when the two are known to be equal. Index: gcc/expr.c =================================================================== --- gcc/expr.c 2017-07-13 09:18:47.609081780 +0100 +++ gcc/expr.c 2017-07-13 09:18:48.752992795 +0100 @@ -8671,7 +8671,7 @@ #define REDUCE_BIT_FIELD(expr) (reduce_b rtx htem, hipart; op0 = expand_normal (treeop0); if (TREE_CODE (treeop1) == INTEGER_CST) - op1 = convert_modes (innermode, mode, + op1 = convert_modes (word_mode, mode, expand_normal (treeop1), TYPE_UNSIGNED (TREE_TYPE (treeop1))); else @@ -8682,8 +8682,8 @@ #define REDUCE_BIT_FIELD(expr) (reduce_b goto widen_mult_const; temp = expand_binop (mode, other_optab, op0, op1, target, unsignedp, OPTAB_LIB_WIDEN); - hipart = gen_highpart (innermode, temp); - htem = expand_mult_highpart_adjust (innermode, hipart, + hipart = gen_highpart (word_mode, temp); + htem = expand_mult_highpart_adjust (word_mode, hipart, op0, op1, hipart, zextend_p); if (htem != hipart)
