Chia-I Wu <[email protected]> writes: > From: Chia-I Wu <[email protected]> > > FS_OPCODE_OVERWRITE_DST is used to indicate that the destination register is > (completely) overwritten. No code is emitted, but the liveness analysis can > use it as a hint to add the destination register to DEF bitset. This is > needed because it is hard to figure out if some partial writes combined > constitute a complete write during liveness analysis, while it is easier for > the FS visitor to know if that is the case.
I'm not a fan of this one (particularly the adding of scheduling barriers). Any other ways you looked at to deal with this? Patch 1, 2, 4 are: Reviewed-by: Eric Anholt <[email protected]> and I wouldn't mind seeing them land early.
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