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archived-llvm/include/llvm/Transforms/Vectorize
Bjorn Pettersson b915bf3d8a [LV] Fix miscompiles by adding non-header PHI nodes to AllowedExit
Summary:
Fold-tail currently supports reduction last-vector-value live-out's,
but has yet to support last-scalar-value live-outs, including
non-header phi's. As it relies on AllowedExit in order to detect
them and bail out we need to add the non-header PHI nodes to
AllowedExit, otherwise we end up with miscompiles.

Solves https://bugs.llvm.org/show_bug.cgi?id=43166

Reviewers: fhahn, Ayal

Reviewed By: fhahn, Ayal

Subscribers: anna, hiraditya, rkruppe, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67074

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370721 91177308-0d34-0410-b5e6-96231b3b80d8
2019-09-03 09:33:55 +00:00
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