Uday Bondhugula 6911c24e97 Sketch out affine analysis structures: AffineValueMap, IntegerValueSet, ... FlatAffineConstraints, and MutableAffineMap. All four classes introduced reside in lib/Analysis and are not meant to be used in the IR (from lib/IR or lib/Parser/). They are all mutable, alloc'ed, dealloc'ed - although with their fields pointing to immutable affine expressions (AffineExpr *). While on this, update simplifyMod to fold mod to a zero when possible. PiperOrigin-RevId: 209618437		2019-03-29 13:03:24 -07:00
mlir	Sketch out affine analysis structures: AffineValueMap, IntegerValueSet,	2019-03-29 13:03:24 -07:00