Today I learned six new things:

  - Clang thinks compressing 0x104111 to 0x495 is a good idea
  - Clang thinks 0x495>>((c-'a')>>1)&1 is better than
      1<<c-'a'&0x104111
  - LLVM has a machine code analyzer
  - Godbolt has a button to apply it
  - Clang is wrong about that
  - Gcc-9 and newer prefers to index into a jump table, 
      instead of bitmasking. (!)

Yet another reason to set up a periodic contribution to Godbolt.