Much more aggressive alloc_elim_pass!#23240

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yuyichao wants to merge 3 commits intomasterfrom yyc/typeinf/alloc

+2,083-559

Commits on Oct 21, 2017

Add a simple pass to copy Exprs that appears multiple times in the AST
yuyichao
committed
Add a linearization pass in inference to make the AST easier to process
yuyichao
committed
Introduce a recursive/more aggressive allocation elimination pass
yuyichao
committed