Rollup merge of #48939 - wesleywiser:incr_query_wf_checking, r=michaelwoerister

Querify WF-checking so it can be cached

r? @michaelwoerister

diff --cc src/librustc/dep_graph/dep_node.rs
Simple merge

diff --cc src/librustc/ty/maps/mod.rs
Simple merge

diff --cc src/librustc/ty/maps/plumbing.rs
Simple merge

diff --cc src/librustc_typeck/check/mod.rs
Simple merge