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tcg/optimize: Fold orc with immediate to or

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Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-10 08:13:10 -06:00
parent 49bd751497
commit 50e40ecd7a
1 changed files with 23 additions and 2 deletions
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25
tcg/optimize.c
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@ -2143,6 +2143,7 @@ static bool fold_or(OptContext *ctx, TCGOp *op)
static bool fold_orc(OptContext *ctx, TCGOp *op)
{
uint64_t s_mask;
TempOptInfo *t1, *t2;
if (fold_const2(ctx, op) ||
fold_xx_to_i(ctx, op, -1) ||
@ -2151,8 +2152,28 @@ static bool fold_orc(OptContext *ctx, TCGOp *op)
return true;
}
s_mask = arg_info(op->args[1])->s_mask
& arg_info(op->args[2])->s_mask;
t2 = arg_info(op->args[2]);
if (ti_is_const(t2)) {
/* Fold orc r,x,i to or r,x,~i. */
switch (ctx->type) {
case TCG_TYPE_I32:
case TCG_TYPE_I64:
op->opc = INDEX_op_or;
break;
case TCG_TYPE_V64:
case TCG_TYPE_V128:
case TCG_TYPE_V256:
op->opc = INDEX_op_or_vec;
break;
default:
g_assert_not_reached();
}
op->args[2] = arg_new_constant(ctx, ~ti_const_val(t2));
return fold_or(ctx, op);
}
t1 = arg_info(op->args[1]);
s_mask = t1->s_mask & t2->s_mask;
return fold_masks_s(ctx, op, s_mask);
}