Generalize commit 4089 to arbitrary closures, and not just the current
'space' or call frame. Now we should be treating spaces just like any
other data structure, and reclaiming all addresses inside them when we
need to.
The cost: all spaces must now specify what recipe generated them (so
they know how to interpret the array of locations) using the /names
property.
We can probably make this ergonomic with a little 'type inference'. But
at least things are safe now.
There seems to be some chance of speed-up when I inline these functions.
However, it's not a clear enough signal to justify improving the `build`
script to handle the `inline` keyword.
Current timing experiments:
Before After
ubuntu 1GB 9:22,8:48,8:51,9:16,9:17,8:36,9:05 8:55,8:41,8:15,8:27,8:29,8:54,9:29
OS X 8GB 4:05,4:00,4:18,4:09,3:40,3:51,3:56 3:58,3:52,4:01,4:13,4:16,4:31,4:13
It's always confusing when `break` refers to a `switch` but `continue`
refers to the loop around the `switch`. But we've done ugly things like
this and `goto` for expedience. However, we're starting to run into cases
where we now need to insert code at every `continue` or `continue`-mimicking
`goto` inside the core interpreter loop. Better to make the loop single-entry-single-exit.
Common things to run after every instruction will now happen inside the
`finish_instruction` function rather than at the `finish_instruction` label.
Always show instruction before any transforms in error messages.
This is likely going to make some errors unclear because they *need* to
show the original instruction. But if we don't have tests for those
situations did they ever really work?
Kartik Agaram
Stephen Malina