Stream: git-wasmtime

Topic: wasmtime / PR #7711 Optimize more reduction-of-an-extend ...

Wasmtime GitHub notifications bot (Dec 20 2023 at 04:19):

scottmcm requested wasmtime-compiler-reviewers for a review on PR #7711.

Wasmtime GitHub notifications bot (Dec 20 2023 at 04:19):

scottmcm requested abrown for a review on PR #7711.

Wasmtime GitHub notifications bot (Dec 20 2023 at 04:19):

scottmcm opened PR #7711 from scottmcm:reduce-of-extend to bytecodealliance:main:

I was exploring ireduce patterns more after I removed them from https://github.com/bytecodealliance/wasmtime/pull/7693#discussion_r1430497487 at fitzgen's request.

In doing so, I noticed that there were some simpler cases missing first, like (char)(long)my_int → (char)my_int and (long)(short)my_char → (long)my_char.

So this PR adds those (and the unsigned equivalents).

Wasmtime GitHub notifications bot (Dec 20 2023 at 04:30):

scottmcm edited PR #7711:

I was exploring ireduce patterns more after I removed them from https://github.com/bytecodealliance/wasmtime/pull/7693#discussion_r1430497487 at fitzgen's request.

In doing so, I noticed that there were some simpler cases missing first, like ireduce.i8 sextend.i32 my_i16 → ireduce.i8 my_i16 and ireduce.i16 sextend.i32 my_i8 → sextend.i16 my_i8.

So this PR adds those (and the unsigned equivalents).

Wasmtime GitHub notifications bot (Dec 20 2023 at 06:44):

github-actions[bot] commented on PR #7711:

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Wasmtime GitHub notifications bot (Dec 20 2023 at 19:39):

fitzgen commented on PR #7711:

Thanks for splitting this out!

Would you mind enabling the trace-log feature and looking at this trace log when running wasmtime compile sightglass/benchmarks/spidermonkey/benchmark.wasm[^0] and comparing the numbers before and after this PR? I want to make sure we aren't accidentally blowing up the size of the egraph.

[^0]: github.com/bytecodealliance/sightglass

Wasmtime GitHub notifications bot (Dec 20 2023 at 23:11):

scottmcm commented on PR #7711:

I don't really know what I'm doing, but here's what I got: 7711.diff.txt

I ran .\target\release\wasmtime.exe compile ..\spidermonkey_benchmark.wasm -D log-to-files -C parallel-compilation=n before and after, which meant all the logs were in "wasmtime.dbg.main".

Looks plausible? Nothing that seems like a huge blow-up, but a bunch of places with a couple more CLIF instructions that end up as fewer lowered vcode instructions

Wasmtime GitHub notifications bot (Jan 02 2024 at 17:30):

fitzgen submitted PR review:

Stats look good -- thanks for getting those!

Wasmtime GitHub notifications bot (Jan 02 2024 at 18:56):

alexcrichton commented on PR #7711:

The first failure above was spurious, but the second failure looks like it might be related to this PR

Wasmtime GitHub notifications bot (Jan 03 2024 at 01:27):

scottmcm updated PR #7711.

Wasmtime GitHub notifications bot (Jan 03 2024 at 01:44):

scottmcm commented on PR #7711:

Yup, conflicted with myself from #7719. Should be good now.

Wasmtime GitHub notifications bot (Jan 03 2024 at 02:55):

alexcrichton merged PR #7711.

Last updated: Nov 22 2024 at 16:03 UTC