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tcg/optimize: Simplify fold_andc constant checks

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If operand 2 is constant, then the computation of z_mask and a_mask
will produce the same results as the explicit check via fold_xi_to_i.
Shift the calls of fold_xx_to_i and fold_ix_to_not down below the
i2->is_const check.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-09 17:56:10 -06:00
parent 9ffa5420e9
commit 3c75cb4d64
1 changed files with 5 additions and 4 deletions
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9
tcg/optimize.c
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@ -1482,10 +1482,7 @@ static bool fold_andc(OptContext *ctx, TCGOp *op)
uint64_t z_mask, o_mask, s_mask, a_mask;
TempOptInfo *t1, *t2;
if (fold_const2(ctx, op) ||
fold_xx_to_i(ctx, op, 0) ||
fold_xi_to_x(ctx, op, 0) ||
fold_ix_to_not(ctx, op, -1)) {
if (fold_const2(ctx, op)) {
return true;
}
@ -1510,6 +1507,10 @@ static bool fold_andc(OptContext *ctx, TCGOp *op)
op->args[2] = arg_new_constant(ctx, ~ti_const_val(t2));
return fold_and(ctx, op);
}
if (fold_xx_to_i(ctx, op, 0) ||
fold_ix_to_not(ctx, op, -1)) {
return true;
}
z_mask = t1->z_mask & ~t2->o_mask;
o_mask = t1->o_mask & ~t2->z_mask;