2 commits

Author	SHA1	Message	Date
Josh Bleecher Snyder	43e6923131	cmd/gc: optimize existence-only map lookups ... The compiler converts 'val, ok = m[key]' to tmp, ok = <runtime call> val = *tmp For lookups of the form '_, ok = m[key]', the second statement is unnecessary. By not generating it we save a nil check. Change-Id: I21346cc195cb3c62e041af8b18770c0940358695 Reviewed-on: https://go-review.googlesource.com/1975 Reviewed-by: Russ Cox <rsc@golang.org>	2015-01-07 22:36:06 +00:00
Russ Cox	999a36f9af	cmd/gc: &x panics if x does ... See golang.org/s/go12nil. This CL is about getting all the right checks inserted. A followup CL will add an optimization pass to remove redundant checks. R=ken2 CC=golang-dev https://golang.org/cl/12970043	2013-08-15 14:38:32 -04:00