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Author SHA1 Message Date
David Given
b1a3d76d6f Re-re-add the type inference layer, now I know more about how things work. 
Remove that terrible float promotion code.
 2016-10-22 23:04:13 +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
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
7a6fc7a72b Made sure that all files end in vim magic. 2016-10-05 21:07:29 +02:00
David Given
ac063a6f54 Remove unused variable (reduce memory usage by 1/10). 2016-10-04 22:35:08 +02:00
David Given
bd28bddb92 Massive rewrite of how emitters and the instruction selector works, after I 
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 
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 
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
a3cfe6047f More rigorous dealing of IR groups; no need for is_generated and is_root any 
more (but now passes are required to set IR roots properly when changing
instructions).
 2016-10-01 22:58:29 +02:00
David Given
91e277e046 Predicates work; we now have prefers and requires clauses. Predicates must be 
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
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
a0131fdb47 You know what, the type inference stuff is a complete red herring. What this 
actually needs is a more intelligent register allocator. So, remove the type
inference.
 2016-09-29 19:58:02 +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
cc176e5183 Keep more data around about ir instructions. Implement a half-baked type 
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
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 
generated instruction tree --- holy cow, they look like instructions!
 2016-09-25 22:17:14 +02:00
David Given
629e0ddfc6 Some instruction selection is now happening. 2016-09-24 22:46:08 +02:00
David Given
ed67d427c9 Replaced the block splicer with a trivial block eliminator (which rewrites 
jumps to blocks which contain only a jump). Don't bother storing the bb graph
in the ir nodes; we can find it on demand by walking the tree instead ---
slower, but much easier to understand and more robust. Added a terrible map
library.
 2016-09-23 23:59:15 +02:00
David Given
9077baa850 Add a bodged in algorithm for converting basic block communication from stacked 
variables to SSA. Also add dead block removal and block splicing. IR code is
much better now.
 2016-09-22 23:19:29 +02:00
David Given
6a74cb2e11 Tracing cleanup. Simplified the IR code. Some more opcodes. 2016-09-22 00:15:48 +02:00
David Given
6ce2495aeb Store the EM code up front and build the basic block graph *before* 
generating the IR code. Lots more IR code.
 2016-09-19 23:06:59 +02:00
David Given
176cd7365c Archival checking of the half-written IR treebuilder. 2016-09-18 23:24:54 +02:00