On Fri, Aug 28, 2020 at 01:17:27AM -0500, Segher Boessenkool wrote: > 1) Very many unnecessary moves are generated during expand *anyway*, a > few more will not hurt; > 2) In practice we always generate a move from a pseudo into r12 here, > never a copy from r12 into r12; > 3) Why generate dead code optimising cases that do not happen, making > the compiler bigger and slower, but more importantly, making the > compiler code harder to read?
Uh, OK point 2 and followup 3 is persuasive. I should have thought of that myself, thanks. -- Alan Modra Australia Development Lab, IBM
