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
d6984d60ac
Add parsing support for register aliases.
2016-10-20 21:47:28 +02:00
David Given
9504aec2bd
Function termination gets routed through an exit block; we now have prologues
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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
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
cfe5312fcc
Predicates can now take numeric arguments. The PowerPC predicates have been
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turned into generic ones (as they'll be useful everywhere). Node arguments for
predicates require the '%' prefix for consistency. Hex numbers are permitted.
2016-10-09 12:32:36 +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
3aa30e50d1
Come up with a syntax for register constraints.
2016-10-02 21:51:25 +02:00
David Given
91e277e046
Predicates work; we now have prefers and requires clauses. Predicates must be
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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
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to register classes, so combine them. Refactor the map code.
2016-10-01 12:17:14 +02:00
David Given
b32883b013
More properly keep track of register classes.
2016-09-29 22:32:43 +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
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
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
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compilation (so you can refer to them).
2016-09-24 18:31:35 +02:00
David Given
960259f0b0
Add support for labelled tree nodes.
2016-09-24 12:11:30 +02:00
David Given
4546dd5f22
Massive grammar overhaul and refactor. Hacked in support for predicates, where
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instructions can be turned on and off based on their parameters. New lexer
using a lexer. Now quite a lot of the way towards being a real instruction
selector.
2016-09-21 00:43:10 +02:00
David Given
2183c6c622
Run through clang-format.
2016-09-20 21:00:16 +02:00
David Given
13c117d15d
Import iburg.
2016-09-20 20:37:16 +02:00
