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unboxed int64 -> int conversion is slow #3888

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jvanburen opened this issue Apr 17, 2025 · 0 comments
Open

unboxed int64 -> int conversion is slow #3888

jvanburen opened this issue Apr 17, 2025 · 0 comments
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cmm Cmm language / helpers changes

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external box_int64 : int64# -> int64 = "%box_int64"

let int_of_int64 (i64 : int64#) = Int64.to_int (box_int64 i64)

leads to

(function{test.ml:18,17-63} camlTest__int_of_int64_0_1_code (i64/334: int)
 (+ (<< (>>s (<< i64/334 1) 1) 1) 1))

which is awful - we should be getting rid of that inner sign-extension in lsl_int
@jvanburen jvanburen added the cmm Cmm language / helpers changes label Apr 17, 2025
@jvanburen jvanburen self-assigned this Apr 17, 2025
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