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6 commits

Author SHA1 Message Date
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
21034c0d65 No, dammit, for register allocation I need to walk the blocks in *dominance* 
order. Since the dominance tree has changed when I fiddled with the graph, I
need to recompute it, so factor it out of the SSA pass. Code is uglier than I'd
like but at least the RET statement goes last in the generated code now.
 2016-10-05 23:52:54 +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
c079e97492 Perform SSA conversion of locals. Much, *much* better code now, at least 
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