From 682d6d57baf43c8f7273c328efa3402943bd557f Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 9 Dec 2024 21:13:02 -0600 Subject: [PATCH] tcg/optimize: Build and use z_bits and o_bits in fold_nor Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- tcg/optimize.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index 758f7b142ee..29d1f29124e 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -2231,16 +2231,22 @@ static bool fold_neg(OptContext *ctx, TCGOp *op) static bool fold_nor(OptContext *ctx, TCGOp *op) { - uint64_t s_mask; + uint64_t z_mask, o_mask, s_mask; + TempOptInfo *t1, *t2; if (fold_const2_commutative(ctx, op) || fold_xi_to_not(ctx, op, 0)) { return true; } - s_mask = arg_info(op->args[1])->s_mask - & arg_info(op->args[2])->s_mask; - return fold_masks_s(ctx, op, s_mask); + t1 = arg_info(op->args[1]); + t2 = arg_info(op->args[2]); + + z_mask = ~(t1->o_mask | t2->o_mask); + o_mask = ~(t1->z_mask | t2->z_mask); + s_mask = t1->s_mask & t2->s_mask; + + return fold_masks_zos(ctx, op, z_mask, o_mask, s_mask); } static bool fold_not(OptContext *ctx, TCGOp *op) -- 2.47.2