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* ir: use Serializer.serialize where possible
* ir.Serializer: serialize MultiInfo correctly
* ir.Serializer: empty body needs to result in a skip statement
The firrtl grammar requires at least one statement.
* ir.Serializer: correctly serialize fixed point types and literals
* Serializer: change Seq -> Iterable in order to be Scala 2.13 compatible
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This should speed up the common case
as the compiler never operates on the
unescaped string.
The new escape function also fixes a bug
where ']' was not escaped even though it
is the delimiting character for FileInfo.
In order to maintain backwards
compatibility for the ProtoBuf format,
this patch adds escape/unescape calls
when going from/to protobuf format.
For better performance we should consider
changing the protobuf format.
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This Serializer which is implemented
external to the IR node definition
uses a StringBuilder to achieve about a
1.7x performance improvement when serializing.
Eventually, all implementations of the
`serialize` methd should be replaced with
a call to `Serializer.serialize`.
However, for this PR we keep the old
code in place in order to allow for easy
regression testing with the benchmark JAR
like this:
> java -cp utils/bin/firrtl-benchmark.jar \
firrtl.benchmark.hot.SerializationBenchmark \
~/benchmarks/medium.pb 2 5 test
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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