This *only* changes the internal data structures, it does not affect the user visible syntax or structure of MLIR code. Function gets new "isCFG()" sorts of predicates as a transitional measure.
This patch is gross in a number of ways, largely in an effort to reduce the amount of mechanical churn in one go. It introduces a bunch of using decls to keep the old names alive for now, and a bunch of stuff needs to be renamed.
This is step 10/n towards merging instructions and statements, NFC.
PiperOrigin-RevId: 227044402
The algorithm collects defining operations within a scoped hash table. The scopes within the hash table correspond to nodes within the dominance tree for a function. This cl only adds support for simple operations, i.e non side-effecting. Such operations, e.g. load/store/call, will be handled in later patches.
PiperOrigin-RevId: 223811328
