From: bors <bors@rust-lang.org>
Date: Wed, 27 Feb 2019 01:22:13 +0000 (+0000)
Subject: Auto merge of #58321 - csmoe:substs, r=oli-obk
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=f0be45738dd3524f9487f3cf358ef014b12c4061;p=rust.git

Auto merge of #58321 - csmoe:substs, r=oli-obk

[Step 1] Implement "small substs optimization" for substs of length 1

addresses part of #58310
r?@arielb1
---

f0be45738dd3524f9487f3cf358ef014b12c4061