Implement inlining for #ifNil:*, #ifNotNil:* selectors #59
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This PR uses the existing support for inlining of
ifTrue:
etc to also supportifNil:
etc.The inlining logic is mostly unchanged, just generalized to support the different bytecodes.
The new bytecodes are, incl. JUMP2 omitted here:
The bytecodes check for
nil
and may keep the top element (TOP_TOP
to be read as top is set to top), or pop it on success.The PR also resolves some lint issues and improve the disassembler.
When integers are not tagged, BC_INC now needs a GC check, to avoid running out of memory on the
IfNil
benchmark.