Variable Width Allocation Phase II (take 2) #4773
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This commit removes T_PAYLOAD since the new VWA implementation no longer requires T_PAYLOAD types. Co-authored-by: Aaron Patterson <tenderlove@ruby-lang.org>
This commits implements size classes in the GC for the Variable Width Allocation feature. Unless `USE_RVARGC` compile flag is set, only a single size class is created, maintaining current behaviour. See the redmine ticket for more details. Co-authored-by: Aaron Patterson <tenderlove@ruby-lang.org>
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#4680 caused build failures on Debian i386 and Solaris SPARC due to the most significant bit in pointers being set so the pointers would become negative when casted to
intptr_t. This is problematic for pointer comparisons. We now useuintptr_twhich does not have these problems. This branch has been tested on the previously crashing systems to ensure it works.