Nhat Nguyen 7385772fdb [mlir] [liveness] Conservatively mark operands of return-like op inside non-callable and non-regionbranch op as live (#140793) ...

Currently the liveness analysis always marks operands yielded in regions
that aren't classified as `RegionBranchOpInterface` or
`CallableOpInterface` as non-live. Examples for these ops include
linalg.generic (with `linalg.yield` as terminator) or gpu ops (with
`gpu.yield` as terminator).

This in turn makes the `remove-dead-values` pass always incorrectly
remove the bodies of these ops, leading to invalid IR. Because these ops
define their own semantics, I have conservatively marked all operands of
these yield ops to be live.

2025-05-20 18:36:26 -07:00

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