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Filter: Implement constant promotion for multiple dispatch methods

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This commit is contained in:
Ondrej Zajicek
2023-07-25 17:43:52 +02:00
parent e886959131
commit f0d1396073
3 changed files with 25 additions and 10 deletions
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19
filter/decl.m4
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@@ -379,7 +379,8 @@ m4_undivert(102)m4_dnl
[[m4_dnl The one case in The Big Switch inside interpreter
case INST_NAME():
#define whati (&(what->i_]]INST_NAME()[[))
m4_ifelse(m4_eval(INST_INVAL() > 0), 1, [[if (fstk->vcnt < INST_INVAL()) runtime("Stack underflow"); fstk->vcnt -= INST_INVAL(); ]])
m4_ifelse(m4_eval(INST_INVAL() > 0), 1, [[if (fstk->vcnt < INST_INVAL()) runtime("Stack underflow");
fstk->vcnt -= INST_INVAL();]])
m4_undivert(108)m4_dnl
#undef whati
break;
@@ -572,8 +573,8 @@ fi_constant(struct f_inst *what, struct f_val val)
return what;
}
static int
f_const_promotion(struct f_inst *arg, enum f_type want)
int
f_const_promotion_(struct f_inst *arg, enum f_type want, int update)
{
if (arg->fi_code != FI_CONSTANT)
return 0;
@@ -581,15 +582,17 @@ f_const_promotion(struct f_inst *arg, enum f_type want)
struct f_val *c = &arg->i_FI_CONSTANT.val;
if ((c->type == T_IP) && ipa_is_ip4(c->val.ip) && (want == T_QUAD)) {
*c = (struct f_val) {
.type = T_QUAD,
.val.i = ipa_to_u32(c->val.ip),
};
if (update)
*c = (struct f_val) {
.type = T_QUAD,
.val.i = ipa_to_u32(c->val.ip),
};
return 1;
}
else if ((c->type == T_SET) && (!c->val.t) && (want == T_PREFIX_SET)) {
*c = f_const_empty_prefix_set;
if (update)
*c = f_const_empty_prefix_set;
return 1;
}