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tcg/optimize: Build and use zero, one and affected bits in fold_orc

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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 2024-12-09 22:22:27 -06:00
parent 84b399df9a
commit cc4033ee47
1 changed files with 9 additions and 2 deletions
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11
tcg/optimize.c
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@ -2287,7 +2287,7 @@ static bool fold_or(OptContext *ctx, TCGOp *op)
static bool fold_orc(OptContext *ctx, TCGOp *op) static bool fold_orc(OptContext *ctx, TCGOp *op)
{ {
uint64_t s_mask; uint64_t z_mask, o_mask, s_mask, a_mask;
TempOptInfo *t1, *t2; TempOptInfo *t1, *t2;
if (fold_const2(ctx, op) || if (fold_const2(ctx, op) ||
@ -2318,8 +2318,15 @@ static bool fold_orc(OptContext *ctx, TCGOp *op)
} }
t1 = arg_info(op->args[1]); t1 = arg_info(op->args[1]);
z_mask = t1->z_mask | ~t2->o_mask;
o_mask = t1->o_mask | ~t2->z_mask;
s_mask = t1->s_mask & t2->s_mask; s_mask = t1->s_mask & t2->s_mask;
return fold_masks_s(ctx, op, s_mask);
/* Affected bits are those not known one, masked by those known one. */
a_mask = ~t1->o_mask & t2->o_mask;
return fold_masks_zosa(ctx, op, z_mask, o_mask, s_mask, a_mask);
} }
static bool fold_qemu_ld_1reg(OptContext *ctx, TCGOp *op) static bool fold_qemu_ld_1reg(OptContext *ctx, TCGOp *op)