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Alyssa Rosenzweig
1338a99add
If we have more constants than registers, something will be rematerialized. Use
a simple round-robin heuristic to pick instead of the better-but-slower approach
with RA. This is a heuristic to reduce JIT time with minimal impact on code
quality. In Instcountci, the only impact is a block in oblivion only increasing
instruction count by 0.2%. And moves of constants are free for cycles at least
on Firestorm, so this isn't where we want to spend piles of JIT time anyway.
Difference at 95.0% confidence
-0.00138911 +/- 0.00104724
-0.418608% +/- 0.315587%
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>