David Given
4db402f229
Add (pretty crummy) support for register aliases and static pairs of registers.
...
We should have enough functionality now for rather buggy 8-bit ints and
doubles. Rework the table and the platform.c to match.
2016-10-21 23:31:00 +02:00
David Given
7aa60a6451
Register spilling to the stack frame works, more or less.
2016-10-15 22:53:56 +02:00
David Given
9504aec2bd
Function termination gets routed through an exit block; we now have prologues
...
and epilogues. mcgg now exports some useful data as headers. Start factoring
out some of the architecture-specific bits into an architecture-specific file.
2016-10-15 18:38:46 +02:00
David Given
bb17aea73a
You can now mark a register as corrupting a certain register class; calls work,
...
or at least look like they work. The bad news is that the register allocator
has a rare talent for putting things in the wrong register.
2016-10-15 01:15:08 +02:00
David Given
98fe70a7de
Output register equality constraints work.
2016-10-14 22:17:02 +02:00
David Given
e93c58dc8d
Refactored the way hops are rendered; add support for emitting code (although
...
with no prologue or epilogue yet).
2016-10-11 00:12:11 +02:00
David Given
92bd1ac5f4
Register allocator now gets all the way through all of my test file without
...
crashing (albeit with register moves and swaps stubbed out). Correct code? Who
knows.
2016-10-10 23:19:46 +02:00
David Given
23c3575f0f
The register allocator now makes a spirited attempt to honour register
...
attributes when allocating. Unfortunately, backward edges don't work (because
the limited def-use chain stuff doesn't work across basic blocks). Needs more
thought.
2016-10-09 15:09:34 +02:00
David Given
d75cc0a663
Basic register allocation works!
2016-10-08 23:32:54 +02:00
David Given
4e49830e09
Overhaul of everything phi related; critical edge splitting now happens before
...
anything SSA happens; liveness calculations now look like they might be
working.
2016-10-08 00:21:23 +02:00
David Given
88fb231d6e
Better constraint syntax; mcgg now passes register usage information up to mcg;
...
mcg can track individual hop inputs and outputs (needed for live range
analysis!); the register allocator now puts the basic blocks into the right
order in preparation for live range analysis.
2016-10-05 22:56:25 +02:00
David Given
7a6fc7a72b
Made sure that all files end in vim magic.
2016-10-05 21:07:29 +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
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
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
416b13fd76
Start factoring out the hardware op code.
2016-09-25 23:29:59 +02:00
