[Mesa-dev] AMD_shader_trinary_minmax V2 changes

[Maxence Le Doré]

- Correct typo in predicate function
- Split the patch that introduces ir_builder changes
- Drop trivial min3_expr(), max3_expr(), mid3_expr()
- Thanks to Roland Scheidegger and Mario Rugiero, catch all cases for
evaluation of mid3
- Squash trivial patches.


Tried something to fix my weird mail address with git sendmail. Hope
this will work next time.