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peepmatic: Simplify linear IR

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This commit splits "increments" in two; they previously contained both the
linearized left- and right-hand sides. But only the first increment ever had any
actions, so it was confusing (and space wasting) that all increments had an
"actions" vector. No more!

This commit separates the linearized left-hand side ("matches") from the
linearized right-hand side ("actions").
This commit is contained in:
Nick Fitzgerald
2020-09-22 16:06:07 -07:00
parent 3f0d789830
commit 447c3e71a6
4 changed files with 254 additions and 256 deletions
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19
cranelift/peepmatic/src/automatize.rs
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@@ -19,16 +19,23 @@ where
for opt in &opts.optimizations {
let mut insertion = builder.insert();
for inc in &opt.increments {
// Ensure that this state's associated data is this increment's
// match operation.
let mut is_first = true;
for m in &opt.matches {
// Ensure that this state's associated data is this match's
// operation.
if let Some(op) = insertion.get_state_data() {
assert_eq!(*op, inc.operation);
assert_eq!(*op, m.operation);
} else {
insertion.set_state_data(inc.operation);
insertion.set_state_data(m.operation);
}
insertion.next(inc.expected, inc.actions.clone().into_boxed_slice());
let actions = if is_first {
is_first = false;
opt.actions.clone().into_boxed_slice()
} else {
vec![].into_boxed_slice()
};
insertion.next(m.expected, actions);
}
insertion.finish();
}