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cmd/compile: call memmove on amd64 for large OpMove #25317

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TocarIP opened this Issue May 9, 2018 · 0 comments

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TocarIP commented May 9, 2018

Currently we lower OpMove with large size into REP MOV.
Memmove has optional AVX&co codepath, so it should be faster than REP MOV, or at least as fast if REP MOV is optimal (call overhead is insignificant for large sizes). We should probably generate a call to memmove for really big OpMove.

@agnivade agnivade added this to the Unplanned milestone May 13, 2018

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