Auto merge of #38937 - nrc:save-ty-fix, r=nikomatsakis
Auto merge of #38937 - nrc:save-ty-fix, r=nikomatsakis

save-analysis: fix over-zealous filter on generated code

aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust