Ellis Hoag e6ada7162e [regalloc][basic] Change spill weight for optsize funcs (#112960) ...

Change the spill weight calculations for `optsize` functions to remove
the block frequency multiplier. For those functions, we do not want to
consider the runtime cost of spilling, only the codesize cost.

I built a large app with the basic and greedy (default) register
allocator enabled.

| Regalloc Type | Uncompressed Size Delta | Compressed Size Delta |
| - | - | - |
| Basic | -303.8 KiB (-0.23%) | -232.0 KiB (-0.39%) |
| Greedy | 159.1 KiB (0.12%) | 130.1 KiB (0.22%) |

Since I only saw a size win with the basic register allocator, I decided
to only change the behavior for that type.

2024-10-21 11:10:50 -07:00

12 KiB

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