[PATCH] D141902: [GlobalISel] Detect splats built with G_CONCAT_VECTORS

[Matt Arsenault via Phabricator via llvm-commits]

arsenm accepted this revision.
arsenm added a comment.
This revision is now accepted and ready to land.
Herald added a subscriber: wdng.

This suggests to me we're missing some useful vector combines, but I don't see a problem having this handle this case also



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Comment at: llvm/unittests/CodeGen/GlobalISel/PatternMatchTest.cpp:799
 }
 
 TEST_F(AArch64GISelMITest, MatchNeg) {
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Could use a case with some undefs in it (undef simple element and undef vector component)


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  https://reviews.llvm.org/D141902/new/

https://reviews.llvm.org/D141902