AST to AST JIT Backend
jamtlu at gmail.com
Tue Sep 1 22:06:30 UTC 2020
On Tuesday, 1 September 2020 at 21:36:13 UTC, Francesco Mecca
> On Tuesday, 1 September 2020 at 00:15:24 UTC, James Lu wrote:
>> I have an idea, one way we can get faster compiles for Dlang
>> is by compiling to an existing JITted language, which could be
>> easier to build a proof of concept for than a full optimizing
>> JIT compiler.
>> Perhaps we could compile Dlang to Lua, targeting LuaJIT or
>> well. Combined with Dlang's natural type information, it could
>> result in fast machine code, fast. Backends for the Nim
>> could generate decent quality machine code much faster than
>> LLVM D Compiler.
> Over the years I have made some experiments in ast-to-ast
> conversions for luajit, there is even a nice tool to do that
> easily here:
> The results weren't always satisfying because most of the time
> the luajit optimizer expects idiomatic lua code.
> To be more precise, luajit is so powerful because it is
> optimized for the kind of ast that is emitted from idiomatic
> lua code when compiled.
> It is very difficult to reproduce that for non trivial snippets
> of code.
engine internals. Care to link me to what idiomatically fast Lua
looks like? Or, should we, as you suggest, try microbenchmarking
myself? And should we base AST to AST translation off your work?
language, one needs to de-abstract the AST a bit to get something
easier to translate into a faster Lua/JS AST.)
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