Commits on May 7, 2020

1. optimize composeChar …

   * unfold the non-decomposable case outside the recursive loop
   * use SPEC constr on encode

   

   harendra-kumar committed May 7, 2020
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2. refactor to reduce the number of cases in composeState …

   There was a lot of code bloat earlier, the core size reduced from 50K lines
   to 20K lines.

   

   harendra-kumar committed May 7, 2020
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3. invert the checking of state and char type …

   In composeChar:
   
   * First check the state and then make decisions based on the char type instead
     of doing the opposite. This simplifies the code, the core size reduces by
     1/3rd (it is still huge).
   
   * With this change the code is better amenable to spec-constr
     optimization, with -fspec-constr-count=8 it is able to produce a
     tighter loop improving performance by several times (best improvement is in
     English benchmark).

   

   harendra-kumar committed May 7, 2020
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4. Add bang on constr, remove UNPACKs, add a comment …

   UNPACK pragmas are redundant as we use a blanket -funbox-strict-fields

   

   harendra-kumar committed May 7, 2020
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