David Given
7ae888b754
Hacky workaround the way the Modula-2 compiler generates non-standard sized
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loads and saves. More opcodes; simplified table using macros.
2016-10-22 10:48:22 +02:00
David Given
f851ab83af
Better (and more correct) floating point conversions; fif; various new opcodes.
2016-10-22 00:48:26 +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
e4fec71f9c
Lots more opcodes; better eviction behaviour; better register moves. Lots more
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PowerPC stuff (some working).
2016-10-19 23:29:05 +02:00
David Given
5ad3aa8595
Add a pile of new instructions used by Pascal; I'm going to need to think about
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how locals and the local base are handled.
2016-10-15 13:07:59 +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
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
c079e97492
Perform SSA conversion of locals. Much, *much* better code now, at least
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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
21898f784a
We're going to need some type inference after all, I think. Let's do a little
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for now and see how it goes.
2016-10-01 19:10:22 +02:00
David Given
a0131fdb47
You know what, the type inference stuff is a complete red herring. What this
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actually needs is a more intelligent register allocator. So, remove the type
inference.
2016-09-29 19:58:02 +02:00
David Given
cc176e5183
Keep more data around about ir instructions. Implement a half-baked type
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inference routine to propagate information about floats up the tree, so we know
whether to put floats into special registers as early as possible.
2016-09-26 22:12:46 +02:00
David Given
629e0ddfc6
Some instruction selection is now happening.
2016-09-24 22:46:08 +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
