David Given
e13ff5be31
Don't allocate new vregs for REG and NOP --- a bit hacky, but suppresses stray
...
movs very effectively.
2016-10-04 21:29:03 +02:00
David Given
bd28bddb92
Massive rewrite of how emitters and the instruction selector works, after I
...
realised that the existing approach wasn't working. Now, hopefully, tracks the
instruction trees generated during selection properly.
2016-10-04 00:16:06 +02:00
David Given
68f98cbad7
Instruction selection now happens on a shadow tree, rather than on the IR tree
...
itself. Currently it's semantically the same but the implementation is cleaner.
2016-10-03 20:52:36 +02:00
David Given
288ee56203
Get quite a long way towards basic output-register equality constraints (needed
...
to make special nodes like NOP work properly). Realise that the way I'm dealing
with the instruction selector is all wrong; I need to physically copy chunks of
tree to give to burg (so I can terminate them correctly).
2016-10-02 23:25:54 +02:00
David Given
3aa30e50d1
Come up with a syntax for register constraints.
2016-10-02 21:51:25 +02:00
David Given
c079e97492
Perform SSA conversion of locals. Much, *much* better code now, at least
...
inasmuch as it looks better before register allocation. Basic blocks now know
their own successors and predecessors (after a certain point in the IR
processing).
2016-10-02 17:50:34 +02:00
David Given
06059233da
Make betterer.
2016-10-01 23:41:45 +02:00
David Given
21898f784a
We're going to need some type inference after all, I think. Let's do a little
...
for now and see how it goes.
2016-10-01 19:10:22 +02:00
David Given
91e277e046
Predicates work; we now have prefers and requires clauses. Predicates must be
...
functions. Not convinced that semantic types are actually working --- there are
still problems with earlier statements leaving things in the wrong registers.
2016-10-01 13:56:52 +02:00
David Given
4a3a9a98dc
It doesn't really make a lot of sense to have BURG nonterminal names different
...
to register classes, so combine them. Refactor the map code.
2016-10-01 12:17:14 +02:00
David Given
3a973a19f3
Move fatal(), warning() and aprintf() into the new data module (because they're
...
really useful).
2016-09-30 19:10:30 +02:00
David Given
0d246c0d73
Much better handling of fragments (no run-time code needed to distinguish them
...
from registers) and better handling of individual hops within a paragraph ---
no more ghastly hacks to try and distinguish the input from the output.
2016-09-29 22:06:04 +02:00
David Given
a0131fdb47
You know what, the type inference stuff is a complete red herring. What this
...
actually needs is a more intelligent register allocator. So, remove the type
inference.
2016-09-29 19:58:02 +02:00
David Given
4572f1b774
Actually, I don't need vregs: hops work just as well. Particularly if I
...
restructure things so that I don't need to walk the blasted ir / burg tree
every time I look at an instruction.
2016-09-27 23:38:47 +02:00
David Given
e77c5164cf
Fleshed out hops and vregs. The result is almost looking like code now ---
...
uncanny.
2016-09-27 00:19:45 +02:00
David Given
39aa672422
Sort of keep track of registers and register classes. Start walking the
...
generated instruction tree --- holy cow, they look like instructions!
2016-09-25 22:17:14 +02:00
David Given
bde5792b1a
Collapse several rule arrays into one; actually generate the array properly.
2016-09-25 17:14:54 +02:00
David Given
9f78e0b36b
Rethink the way patterns are mapped to rules; generate emitters (probably
...
badly).
2016-09-25 11:49:51 +02:00
David Given
7c028bdd45
We now record the code fragments to be emitted by each rule.
2016-09-25 00:21:46 +02:00
David Given
629e0ddfc6
Some instruction selection is now happening.
2016-09-24 22:46:08 +02:00
David Given
c8fcbe282a
More grammar changes.
2016-09-24 19:03:55 +02:00
David Given
2acc4ed29d
IR codes are now owned by mcgg; ir terminals are inserted into the table during
...
compilation (so you can refer to them).
2016-09-24 18:31:35 +02:00
David Given
1516657907
Crudely bolt on mcgg to mcg itself.
2016-09-24 17:20:40 +02:00
