Commits on Nov 16, 2021

1. Reduce function size in fast & dfast …

   Take the same approach as in PR facebook#2828 [0] to remove functions that force
   inline many function bodies and `switch`. Instead, create one function per
   "template" combination, and then switch between these functions. This
   allows the compiler to break the large function into many small
   functions, which generally helps codegen.
   
   Also, in the `extDict` modes when there is no ext-dict, call the top
   level function instead of the force inlined one, to save on code size.
   
   I'm specifically doing this because gcc on the parisc architecture doesn't
   handle the large function body well, and ends up using a lot of excess
   stack space. Outlining these functions fixes it.

   

   terrelln committed Nov 16, 2021
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