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cmd/compile: optimize unified IR handling of imported functions

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This CL skips reading of imported function bodies except from the
local package or for inlining. Previously, we wasted a bunch of CPU
and memory by reading in normal function bodies for all imported
functions and methods.

Change-Id: I0b3df3f4a3e2819117dac11a1f9e4526288c14d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/347030
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
This commit is contained in:
Matthew Dempsky 2021-09-01 12:42:35 -07:00
parent 50f38d0405
commit 88859f3cd8
1 changed files with 6 additions and 0 deletions
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6
src/cmd/compile/internal/noder/reader.go
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@ -920,6 +920,12 @@ func (r *reader) addBody(fn *ir.Func) {
pri := pkgReaderIndex{r.p, r.reloc(relocBody), r.dict} pri := pkgReaderIndex{r.p, r.reloc(relocBody), r.dict}
bodyReader[fn] = pri bodyReader[fn] = pri
if fn.Nname.Defn == nil {
// Don't read in function body for imported functions.
// See comment in funcExt.
return
}
if r.curfn == nil { if r.curfn == nil {
todoBodies = append(todoBodies, fn) todoBodies = append(todoBodies, fn)
return return