a367f44c18
This modifies issafepoint in liveness analysis to report almost every operation as a safe point. There are four things we don't mark as safe-points: 1. Runtime code (other than at calls). 2. go:nosplit functions (other than at calls). 3. Instructions between the load of the write barrier-enabled flag and the write. 4. Instructions leading up to a uintptr -> unsafe.Pointer conversion. We'll optimize this in later CLs: name old time/op new time/op delta Template 185ms ± 2% 190ms ± 2% +2.95% (p=0.000 n=10+10) Unicode 96.3ms ± 3% 96.4ms ± 1% ~ (p=0.905 n=10+9) GoTypes 658ms ± 0% 669ms ± 1% +1.72% (p=0.000 n=10+9) Compiler 3.14s ± 1% 3.18s ± 1% +1.56% (p=0.000 n=9+10) SSA 7.41s ± 2% 7.59s ± 1% +2.48% (p=0.000 n=9+10) Flate 126ms ± 1% 128ms ± 1% +2.08% (p=0.000 n=10+10) GoParser 153ms ± 1% 157ms ± 2% +2.38% (p=0.000 n=10+10) Reflect 437ms ± 1% 442ms ± 1% +0.98% (p=0.001 n=10+10) Tar 178ms ± 1% 179ms ± 1% +0.67% (p=0.035 n=10+9) XML 223ms ± 1% 229ms ± 1% +2.58% (p=0.000 n=10+10) [Geo mean] 394ms 401ms +1.75% No effect on binary size because we're not yet emitting these extra safe points. For #24543. Change-Id: I16a1eebb9183cad7cef9d53c0fd21a973cad6859 Reviewed-on: https://go-review.googlesource.com/109348 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> |
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