[PATCH] D21631: [LV] Look through PHIs when collecting uniform values

[Michael Kuperstein via llvm-commits]

mkuper added inline comments.

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Comment at: test/Transforms/LoopVectorize/X86/uniform-phi.ll:7
@@ +6,3 @@
+; CHECK-LABEL: test
+; CHECK: LV: Found uniform instruction:   %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
+; CHECK: LV: Found uniform instruction:   %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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And this is probably wrong, for the same reason as http://reviews.llvm.org/D20474#inline-183502
We want to look through the PHI, but we don't want to mark the PHI itself uniform. I'll update the patch.


http://reviews.llvm.org/D21631