[PATCH] D43349: [InstCombine] Make SimplifyDemandedUseBits handle PhiNode

[Daniel Berlin via Phabricator via llvm-commits]

dberlin added a comment.

Interesting. NewGVN can already figure this out if it's important.
How often does stuff like this occur?



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Comment at: test/Transforms/InstCombine/simplify-demanded-bits-across-phi.ll:35
+  %11 = phi i64 [ %9, %6 ], [ %5, %3 ], [ 0, %2 ]
+; ssCHECK: %{{[0-9]+}} = phi i64 [ %[[V3]], %[[L2]] ], [ %[[V1]], %[[L1]] ], [ 0, %{{[0-9]+}} ]
+  %12 = lshr exact i64 %11, 32
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Remove the ss :)


https://reviews.llvm.org/D43349