61158c162f
This extends the liveness analysis to track registers containing live pointers. We do this by tracking bitmaps for live pointer registers in parallel with bitmaps for stack variables. This does not yet do anything with these liveness maps, though they do appear in the debug output for -live=2. We'll optimize this in later CLs: name old time/op new time/op delta Template 193ms ± 5% 195ms ± 2% ~ (p=0.050 n=9+9) Unicode 97.7ms ± 2% 98.4ms ± 2% ~ (p=0.315 n=9+10) GoTypes 674ms ± 2% 685ms ± 1% +1.72% (p=0.001 n=9+9) Compiler 3.21s ± 1% 3.28s ± 1% +2.28% (p=0.000 n=10+9) SSA 7.70s ± 1% 7.79s ± 1% +1.07% (p=0.015 n=10+10) Flate 130ms ± 3% 133ms ± 2% +2.19% (p=0.003 n=10+10) GoParser 159ms ± 3% 161ms ± 2% +1.51% (p=0.019 n=10+10) Reflect 444ms ± 1% 450ms ± 1% +1.43% (p=0.000 n=9+10) Tar 181ms ± 2% 183ms ± 2% +1.45% (p=0.010 n=10+9) XML 230ms ± 1% 234ms ± 1% +1.56% (p=0.000 n=8+9) [Geo mean] 405ms 411ms +1.48% No effect on binary size because we're not yet emitting the register maps. For #24543. Change-Id: Ieb022f0aea89c0ea9a6f035195bce2f0e67dbae4 Reviewed-on: https://go-review.googlesource.com/109352 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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