Alex Zinenko 37d0d097a9 Drop AffineExpr::Null ... Similarly to other value-type wrappers, the default constructor of AffineExpr constructs a null object and removes the need for an explicit ::Null constructor. Drop it and remove the only user which can trivially rely on the default constructor. -- PiperOrigin-RevId: 249207502		2019-06-01 19:53:33 -07:00
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mlir	Drop AffineExpr::Null	2019-06-01 19:53:33 -07:00
mlir-c	Drop MLIREmitter-based version of the EDSC	2019-04-03 08:30:38 -07:00