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Note: this PR is a draft to avoid accidental merging onto its "base" branch (used as a form of ad-hoc PR stacking), and will remain as such, until its "base" branch can be set to
main, i.e. all prerequisite PRs will have landed.This PR removes the distinction between
DataInstandNode(formerlyControlNode), and theNodeKind::Blockcontainer forDataInst(flattening them into the parentRegionof the "block"Node, instead).The distinction was purely artificial, and mainly guided by remaining close to SPIR-V wherever possible, but SPIR-V blocks are already regenerated (in
spv::lift) from sequences of instructions chained by linear control-flow, so there is no significant benefit to keeping theDataInstsplit (or their "block" containers).Keeping only "regions" and "nodes" also aligns better with RVSDG (where SPIR-T gets those concepts from).
TODO: finish node-vs-node-output attribute handling, remove the
DataInst/DataInstDef/DataInstKindaliases from these commits and future ones (along with the naming style ofinst, however convenient it may have been).