AST to AST JIT Backend
me at francescomecca.eu
Tue Sep 1 21:36:13 UTC 2020
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
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
It is very difficult to reproduce that for non trivial snippets
I suggest you to try that yourself.
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