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Fix and optimize conditionals

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This commit is contained in:
Rerumu 2022-05-19 12:15:42 -04:00
parent 121774082e
commit 8792a123f4
3 changed files with 45 additions and 24 deletions
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28
codegen-luau/src/backend/expression.rs
View File

@ -5,9 +5,11 @@ use wasm_ast::node::{
UnOp, Value,
};
use crate::analyzer::operator::{bin_symbol_of, cmp_symbol_of};
use crate::analyzer::operator::bin_symbol_of;
use super::manager::{write_separated, write_variable, Driver, Manager};
use super::manager::{
write_cmp_op, write_condition, write_separated, write_variable, Driver, Manager,
};
impl Driver for Recall {
fn write(&self, _: &mut Manager, w: &mut dyn Write) -> Result<()> {
@ -18,8 +20,8 @@ impl Driver for Recall {
impl Driver for Select {
fn write(&self, mng: &mut Manager, w: &mut dyn Write) -> Result<()> {
write!(w, "(")?;
self.cond.write(mng, w)?;
write!(w, "~= 0 and ")?;
write_condition(&self.cond, mng, w)?;
write!(w, "and ")?;
self.a.write(mng, w)?;
write!(w, "or ")?;
self.b.write(mng, w)?;
@ -153,21 +155,9 @@ impl Driver for BinOp {
impl Driver for CmpOp {
fn write(&self, mng: &mut Manager, w: &mut dyn Write) -> Result<()> {
if let Some(symbol) = cmp_symbol_of(self.op) {
write!(w, "(")?;
self.lhs.write(mng, w)?;
write!(w, "{symbol} ")?;
self.rhs.write(mng, w)?;
write!(w, ")")
} else {
let (head, tail) = self.op.as_name();
write!(w, "{head}_{tail}(")?;
self.lhs.write(mng, w)?;
write!(w, ", ")?;
self.rhs.write(mng, w)?;
write!(w, ")")
}
write!(w, "(")?;
write_cmp_op(self, mng, w)?;
write!(w, "and 1 or 0)")
}
}

29
codegen-luau/src/backend/manager.rs
View File

@ -3,6 +3,10 @@ use std::{
ops::Range,
};
use wasm_ast::node::{CmpOp, Expression};
use crate::analyzer::operator::cmp_symbol_of;
#[derive(PartialEq, Eq)]
pub enum Label {
Forward,
@ -63,3 +67,28 @@ pub fn write_variable(var: usize, mng: &Manager, w: &mut dyn Write) -> Result<()
write!(w, "param_{var} ")
}
}
pub fn write_cmp_op(cmp: &CmpOp, mng: &mut Manager, w: &mut dyn Write) -> Result<()> {
if let Some(symbol) = cmp_symbol_of(cmp.op) {
cmp.lhs.write(mng, w)?;
write!(w, "{symbol} ")?;
cmp.rhs.write(mng, w)
} else {
let (head, tail) = cmp.op.as_name();
write!(w, "{head}_{tail}(")?;
cmp.lhs.write(mng, w)?;
write!(w, ", ")?;
cmp.rhs.write(mng, w)?;
write!(w, ")")
}
}
pub fn write_condition(data: &Expression, mng: &mut Manager, w: &mut dyn Write) -> Result<()> {
if let Expression::CmpOp(node) = data {
write_cmp_op(node, mng, w)
} else {
data.write(mng, w)?;
write!(w, "~= 0 ")
}
}

12
codegen-luau/src/backend/statement.rs
View File

@ -9,7 +9,9 @@ use wasm_ast::node::{
Return, SetGlobal, SetLocal, Statement, StoreAt,
};
use super::manager::{write_ascending, write_separated, write_variable, Driver, Label, Manager};
use super::manager::{
write_ascending, write_condition, write_separated, write_variable, Driver, Label, Manager,
};
fn br_target(level: usize, in_loop: bool, w: &mut dyn Write) -> Result<()> {
write!(w, "if desired then ")?;
@ -86,8 +88,8 @@ impl Driver for If {
write!(w, "while true do ")?;
write!(w, "if ")?;
self.cond.write(mng, w)?;
write!(w, "~= 0 then ")?;
write_condition(&self.cond, mng, w)?;
write!(w, "then ")?;
self.truthy.iter().try_for_each(|s| s.write(mng, w))?;
@ -132,8 +134,8 @@ impl Driver for Br {
impl Driver for BrIf {
fn write(&self, mng: &mut Manager, w: &mut dyn Write) -> Result<()> {
write!(w, "if ")?;
self.cond.write(mng, w)?;
write!(w, "~= 0 then ")?;
write_condition(&self.cond, mng, w)?;
write!(w, "then ")?;
write_br_at(self.target, mng, w)?;
write!(w, "end ")
}