Replace std.builtin.CallingConvention with a tagged union, eliminating @setAlignStack
#17300
| Job | Run time |
|---|---|
| 2h 15m 53s | |
| 1h 17m 54s | |
| 2h 59m 58s | |
| 1h 26m 5s | |
| 38m 5s | |
| 30m 58s | |
| 57m 20s | |
| 1h 36m 6s | |
| 23m 7s | |
| 22m 17s | |
| 12h 27m 43s |