Bill Currie
db605fa998
Improve the type accuracy of dag_gencode.
...
Surprisingly, I don't yet have to "throw one out", but things are still
problematic: rcall1 is getting two arguments, goto and return get lost,
rcall2 got an old temp rather than the value it was supposed to, but
progress :)
2012-11-15 17:58:33 +09:00
Bill Currie
012a521dc5
Strip aliases off daglabel operands.
...
However, the original type of the operand, as seen by the statement, is
kept. Mostly works, but has some problems with plistmenu.r
2012-11-15 15:53:51 +09:00
Bill Currie
d76e2a8423
Make a start on regenerating code from dags.
...
Some parts are a lot messier than I thought, so the actual codegen in the
dags code is just a minimal stub for now.
2012-11-15 13:44:09 +09:00
Bill Currie
2b2ea5c9b3
Compute dags as part of data flow analysis.
...
I want to use the live variable information when building the dags.
2012-11-15 13:44:08 +09:00
Bill Currie
9f409b1ac4
Rename make_dag to dag_create.
2012-11-15 13:44:08 +09:00
Bill Currie
0b49bd343c
Collect information on statements that set or use vars.
...
First, it turns out using daglabels wasn't such a workable plan (due to
labels being flushed every sblock). Instead, flowvars are used. Each actual
variable (whether normal or temp) has a pointer to the flowvar attached to
that variable.
For each variable, the statements that use or define the variable are
recorded in the appropriate set attached to each (flow)variable.
2012-11-15 13:44:08 +09:00
Bill Currie
739ebc522c
Begin working on flow analysis.
...
For now, variable and flow graph node maps are built.
2012-11-15 13:44:06 +09:00
Bill Currie
dc9d2a982e
Make the returned dag a linked list of root-nodes.
...
A dag can have mulitple "root" nodes (ie, nodes with no parents).
2012-11-15 13:44:06 +09:00
Bill Currie
0ccf4093e4
Handle attached identifier labels correctly.
...
I'd forgotten I had the prev field. Makes for much cleaner code.
2012-11-15 13:44:06 +09:00
Bill Currie
dbf1aa8f72
Attach dags to statement blocks.
...
Now, if a dag is attached to a statement block, it will be included in the
flowgraph with that statement block.
2012-11-15 13:44:06 +09:00
Bill Currie
d9354255a3
Avoid double-printing dag nodes.
2012-11-15 13:44:05 +09:00
Bill Currie
8015e1b1e9
Put the dags stuff into a qfcc sub-section.
...
Not much point writting docs if they can't be found.
2012-11-15 13:44:05 +09:00
Bill Currie
aa2943709e
Start work on building dags from basic blocks.
...
Doesn't compile and the design is in flux anyway, but I want to get back to
iqm.
2012-11-15 13:44:05 +09:00
Bill Currie
60108c688c
Change dags from binary to trinary.
...
I'd forgotten some instructions take three inputs that can benefit from
CSE.
2012-11-15 13:44:05 +09:00
Bill Currie
0fefeb73fe
Initial support for basic block dags.
...
Currently, only dumping to dot, but that seems to be a very sensible place
to start: debug support.
2012-11-15 13:44:05 +09:00
