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cmd/compile: disable checknils during alg eq generation

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Cuts 20k off cmd/go and 32k off golang.org/x/tools/cmd/godoc, approx 0.15% each.

For #6853 and #9930

Change-Id: Ic510b76b80a9153b1ede7b3533d2dbc16caa5c63
Reviewed-on: https://go-review.googlesource.com/19768
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2015-05-04 18:16:50 -07:00
parent e7f6d8b2d7
commit 36694064e5
1 changed files with 9 additions and 1 deletions
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10
src/cmd/compile/internal/gc/subr.go
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@ -2862,10 +2862,18 @@ func geneq(sym *Sym, t *Type) {
// for a struct containing a reflect.Value, which itself has
// an unexported field of type unsafe.Pointer.
old_safemode := safemode
safemode = 0
// Disable checknils while compiling this code.
// We are comparing a struct or an array,
// neither of which can be nil, and our comparisons
// are shallow.
Disable_checknil++
funccompile(fn)
safemode = old_safemode
Disable_checknil--
}
func ifacelookdot(s *Sym, t *Type, followptr *bool, ignorecase int) *Type {