perf: fold LSB-test `i32.and X 1` into `i32.ctz` in boolean contexts#8562

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ggreif wants to merge 3 commits intoWebAssembly:mainfrom

ggreif:gabor/lsb-if-ctz

Commits on Apr 1, 2026

perf(OptimizeInstructions): fold `i32.and X 1; if T E` into `i32.ctz X; if E T`

ggreif
and
claude
committed
perf(OptimizeInstructions): fold `eqz(and X 1)` into `ctz X` in boolean context

ggreif
and
claude
committed
chore: remove nix files (not for upstream)
ggreif
committed