David Given
a311e61360
Add support for preserved registers.
2016-10-29 20:22:44 +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
abd0cedd61
Massive change to how IR types are handled; we use the type code for matching
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rather than the size. Much cleaner and simpler.
2016-10-23 21:54:14 +02:00
David Given
4db402f229
Add (pretty crummy) support for register aliases and static pairs of registers.
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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
d6984d60ac
Add parsing support for register aliases.
2016-10-20 21:47:28 +02:00
David Given
517120d0fb
Allow asm names for registers which are different from the friendly names shown
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in the tracing (because PowerPC register names are just numbers).
2016-10-15 11:42:47 +02:00
David Given
bb17aea73a
You can now mark a register as corrupting a certain register class; calls work,
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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
f06b51c981
Keep track of register types as well as attributes --- the type being how we
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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
23c3575f0f
The register allocator now makes a spirited attempt to honour register
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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
88fb231d6e
Better constraint syntax; mcgg now passes register usage information up to mcg;
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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
92502901a7
Better management of register data. Add struct hreg.
2016-10-05 21:00:28 +02:00
David Given
bd28bddb92
Massive rewrite of how emitters and the instruction selector works, after I
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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
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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
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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
b32883b013
More properly keep track of register classes.
2016-09-29 22:32:43 +02:00
David Given
0d246c0d73
Much better handling of fragments (no run-time code needed to distinguish them
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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
416b13fd76
Start factoring out the hardware op code.
2016-09-25 23:29:59 +02:00
David Given
39aa672422
Sort of keep track of registers and register classes. Start walking the
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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
bcc74ba18d
Stupid stringlist is stupid. Use a proper data structure, properly abstracted
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out (so other things can use it).
2016-09-25 12:18:39 +02:00
David Given
9f78e0b36b
Rethink the way patterns are mapped to rules; generate emitters (probably
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badly).
2016-09-25 11:49:51 +02:00
David Given
629e0ddfc6
Some instruction selection is now happening.
2016-09-24 22:46:08 +02:00
