Am 05.09.2018 um 12:36 schrieb Remi Forax:
[...]
it's not free if you ask ASM (COMPUTE_FRAMES) to do the fix point algorithm
(which is not linear) and to infer the common supertype, if you generate the
StackFrames in the groovy compiler by calling explicitly visitFrame, the
runtime cost is not big (but you need to modify your compiler backend which has
development a cost).
we cannot let asm just do this 100% for us. The classes under
compilation are possibly not available through classloading, and asm
might not even use the right classloader if they would. what we do then
is using COMPUTE_FRAMES, but override
protected String getCommonSuperClass(String arg1, String arg2)
which does a not 100% correct calculation of the common super class.
(not 100% correct means here to claim it is Object in some cases, where
there would be a better fit)
bye Jochen
