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tcg/optimize: Build and use o_bits in fold_extract

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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 15:34:12 -06:00
parent 9d80b3c890
commit fcde7363d3
1 changed files with 5 additions and 7 deletions
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12
tcg/optimize.c
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@ -1963,7 +1963,7 @@ static bool fold_eqv(OptContext *ctx, TCGOp *op)
static bool fold_extract(OptContext *ctx, TCGOp *op)
{
uint64_t z_mask_old, z_mask;
uint64_t z_mask, o_mask, a_mask;
TempOptInfo *t1 = arg_info(op->args[1]);
int pos = op->args[2];
int len = op->args[3];
@ -1973,13 +1973,11 @@ static bool fold_extract(OptContext *ctx, TCGOp *op)
extract64(ti_const_val(t1), pos, len));
}
z_mask_old = t1->z_mask;
z_mask = extract64(z_mask_old, pos, len);
if (pos == 0 && fold_affected_mask(ctx, op, z_mask_old ^ z_mask)) {
return true;
}
z_mask = extract64(t1->z_mask, pos, len);
o_mask = extract64(t1->o_mask, pos, len);
a_mask = pos ? -1 : t1->z_mask ^ z_mask;
return fold_masks_z(ctx, op, z_mask);
return fold_masks_zosa(ctx, op, z_mask, o_mask, 0, a_mask);
}
static bool fold_extract2(OptContext *ctx, TCGOp *op)