Commits on Apr 12, 2024

1. [M68k] Add support for MOVEQ instruction …

   Add support for the moveq instruction, which is both faster and smaller
   (1/2 to 1/3 the size) than a move with immediate to register.
   
   This change introduces the instruction, along with a set of
   pseudoinstructions to handle immediate moves to a register that is
   lowered post-RA.
   
   Pseudos are used as moveq can only write to the full register, which makes
   matching i8 and i16 immediate loads difficult in tablegen. Furthermore,
   selecting moveq before RA constrains that immediate to be moved into a data
   register, which may not be optimal.
   
   The bulk of this change are fixes to existing tests, which cover the new
   functionality sufficiently.

   

   n8pjl committed Apr 12, 2024
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