David Given
d2c14ca44f
Precisely one stack hreg gets allocated for each vreg/congruence group for
...
eviction; this prevents us from having to worry about moving values from stack
slot to stack slot, which is hard.
2018-09-08 18:59:55 +02:00
David Given
81bc2c74c5
A bb's regsin are no longer the same as those of its first instruction;
...
occasionally the first hop of a block would try to rearrange its registers (due
to evicted throughs), resulting in the phi moves copying values into the wrong
registers.
2016-11-16 20:52:15 +01:00
David Given
581fa4a457
Reenable eviction of corrupted registers, which had been broken by a previous
...
change. Change the register move code to get swaps right, or at least righter.
2016-11-15 21:55:10 +01:00
David Given
852d3a691d
Update the table to return call output values in the right registers. Fix the
...
register allocator so the corrupted registers only apply to throughs
(otherwise, you can't put output registers in corrupted registers).
2016-11-11 21:48:36 +01:00
David Given
2cc2c0ae98
Lots more opcodes. Rearrange the stack layout so that fp->ab is a fixed value
...
(needed for CHAINFP and FPTOAB). Wire up lfrs to calls via a phi when
necessary, to allow call-bra-lfr chains.
2016-10-29 11:57:56 +02:00
David Given
81525c0f2c
Swaps work (at least for registers). More opcodes. Rearrange the stack layout
...
so we can always trivially find fp, which lets CHAINFP work.
2016-10-27 21:50:58 +02:00
David Given
9977ce841a
Remove the bytes1, bytes2, bytes4, bytes8 attributes; remove the concept of a
...
register 'type'; now use int/float/long/double throughout to identify
registers. Lots of register allocator tweaks and table bugfixes --- we now get
through the dreading Mathlib.mod!
2016-10-25 23:04:20 +02:00
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
e4fec71f9c
Lots more opcodes; better eviction behaviour; better register moves. Lots more
...
PowerPC stuff (some working).
2016-10-19 23:29:05 +02:00
David Given
a8ee82d197
Stop passing proc around, and use a global instead --- much cleaner.
2016-10-15 23:19:44 +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
a63052427e
Factor out the register allocation routines to make them easier to deal with.
2016-10-14 23:17:06 +02:00
David Given
98fe70a7de
Output register equality constraints work.
2016-10-14 22:17:02 +02:00
David Given
f06b51c981
Keep track of register types as well as attributes --- the type being how we
...
find new registers when evicting values. Input constraints work (they were
being ignored before). Various bug fixing so they actually work.
2016-10-12 22:58:46 +02:00
David Given
96dffd2007
Clean up the allocator a bit, in preparation for making it lots more
...
complicated; no semantic changes.
2016-10-11 23:17:30 +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
fac12aae32
Calculate phi congruency groups; use them to solve the
...
importing-hreg-from-the-future problem (probably poorly).
2016-10-09 22:04:20 +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
ee93389c5f
Refactor the cfg and dominance stuff to make it a lot nicer.
2016-10-06 21:34:21 +02:00
David Given
d20b63dc94
The register allocator is really a pass, so arrange the code like one.
2016-10-05 23:55:38 +02:00
