cmd/compile: disable checknils during alg eq generation
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>
diff --git a/src/cmd/compile/internal/gc/subr.go b/src/cmd/compile/internal/gc/subr.go
index f48b7cd..bda1c95 100644
--- a/src/cmd/compile/internal/gc/subr.go
+++ b/src/cmd/compile/internal/gc/subr.go
@@ -2862,10 +2862,18 @@
// 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 {
