Wed, 8 Aug 2001 12:16:18 -0700 (PDT)
> Matthew, commonBlock is causing regression failures (presumably due to scoping)
> on array4 and cases.
I'm checking in a fix to that right now.
Here's the problem:
fun f ()
fun loop (x) = ...
fun doit_1 () = loop (global_1)
fun doit_2 () = loop (global_1)
fun loop (x)
fun g () = loop (global_1)
fun h () = loop (global_1)
There are four blocks that have identical bodies. So, I want to replace
bodies of the form loop (global_1) with L () and insert the
declaration fun L () = loop (global_1).
The question is where do I insert that declaration? For g and h, it needs
to go as the first declaration inside loop. For doit_1 and doit_2 it
needs to go as the first declaration after loop. The increasingly
inelegant solution is to maintain two sets of common block declarations
for each jump label -- those that go inside and those that go after.
Ugh... Wouldn't it be great if there were some IL where I could just add
new blocks to a function without needing to maintain restrictive scoping