[PATCH] D130661: RegAllocGreedy: Try local instruction splitting with subranges

[Quentin Colombet via Phabricator via llvm-commits]

qcolombet accepted this revision.
qcolombet added a comment.
This revision is now accepted and ready to land.

LGTM with nit.



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Comment at: llvm/lib/CodeGen/RegAllocGreedy.cpp:1257
+    if (SubReg == 0 && MO.isUse())
+      return MRI.getMaxLaneMaskForVReg(Reg);
+
----------------
I don't think we can early return here.
Technically different operands could be on different register classes and IIRC that may give different `LaneBitmask`s.


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https://reviews.llvm.org/D130661