cmd/compile: allow deduplication of long strings
String symbols' names used to appear in the final binary. Using a string's contents as it's symbol's name was a thus a bad idea if the string's name was long. Recent improvements by crawshaw have changed that. Instead of placing long strings behind opaque names in local packages, place them in the global string package and make them content-addressable. Symbol names still occur in the object files, so use a hash to avoid needless length there. Reduces the size of cmd/go by 30k. Change-Id: Ifdbbaf47bf44352418c90ddd903d5106e48db4f1 Reviewed-on: https://go-review.googlesource.com/20524 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:David Crawshaw <crawshaw@golang.org>
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