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[dev.link] cmd/link: minor perf tweak for PropagateLoaderChangesToSymbols

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When fixing up relocations in PropagateLoaderChangesToSymbols, don't
reallocate the target sym.Symbol relocation slice if it already has
the desired size (this gets rid of some unneeded allocations).

Change-Id: I05287772c18cab861c2df805fa9497103fb00dcc
Reviewed-on: https://go-review.googlesource.com/c/go/+/224420
Reviewed-by: Jeremy Faller <jeremy@golang.org>
This commit is contained in:
Than McIntosh 2020-03-20 10:34:58 -04:00
parent 0dff5b0b9e
commit 7055f01e12
1 changed files with 3 additions and 1 deletions
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4
src/cmd/link/internal/loader/loader.go
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@ -1977,7 +1977,9 @@ func (l *Loader) PropagateLoaderChangesToSymbols(toconvert []Sym, syms *sym.Symb
s := l.Syms[cand]
relocs := l.Relocs(cand)
rslice = relocs.ReadAll(rslice)
s.R = make([]sym.Reloc, len(rslice))
if len(s.R) != len(rslice) {
s.R = make([]sym.Reloc, len(rslice))
}
l.convertRelocations(rslice, s, true)
}