[PATCH] D57841: [x86] narrow 256-bit horizontal ops via demanded elements

[Simon Pilgrim via Phabricator via llvm-commits]

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

LGTM with one (optional) minor.



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Comment at: lib/Target/X86/X86ISelLowering.cpp:32981
+      EVT VT128 = EVT::getVectorVT(*TLO.DAG.getContext(), VT.getScalarType(),
+                                   VT.getVectorNumElements() / 2);
+      SDValue NarrowHop = TLO.DAG.getNode(Opc, DL, VT128, Ext0, Ext1);
----------------
You should be able to just use Ext0.getValueType()?


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  https://reviews.llvm.org/D57841/new/

https://reviews.llvm.org/D57841