Adapt AddRetag for shallow retagging#63306
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bors merged 3 commits intorust-lang:masterfrom Aug 15, 2019
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With rust-lang/miri#872, Miri only retags "bare" references, not those nested in compound types. This adjust
Retagstatement generation to don't emit retags if they are definitely not a bare reference.I also expanded the mir-opt test to cover the
Retagin the drop shim, which had previously not been tested.