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tcg/optimize: Build and use o_bits in fold_xor

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Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-10 08:39:56 -06:00
parent cc4033ee47
commit 787190e3f4
1 changed files with 6 additions and 3 deletions
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9
tcg/optimize.c
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@ -3039,7 +3039,7 @@ static bool fold_tcg_st_memcopy(OptContext *ctx, TCGOp *op)
static bool fold_xor(OptContext *ctx, TCGOp *op)
{
uint64_t z_mask, s_mask;
uint64_t z_mask, o_mask, s_mask;
TempOptInfo *t1, *t2;
if (fold_const2_commutative(ctx, op) ||
@ -3051,9 +3051,12 @@ static bool fold_xor(OptContext *ctx, TCGOp *op)
t1 = arg_info(op->args[1]);
t2 = arg_info(op->args[2]);
z_mask = t1->z_mask | t2->z_mask;
z_mask = (t1->z_mask | t2->z_mask) & ~(t1->o_mask & t2->o_mask);
o_mask = (t1->o_mask & ~t2->z_mask) | (t2->o_mask & ~t1->z_mask);
s_mask = t1->s_mask & t2->s_mask;
return fold_masks_zs(ctx, op, z_mask, s_mask);
return fold_masks_zos(ctx, op, z_mask, o_mask, s_mask);
}
/* Propagate constants and copies, fold constant expressions. */