tree 2f8c4a0a55960705facab0b4397892a7af05635c
parent 9bd179193e8067cbadc523e912083fbc368e1b9a
author Anna Thomas <anna@azul.com> 1494340173 +0000
committer Anna Thomas <anna@azul.com> 1494340173 +0000

[LV] Fix insertion point for shuffle vectors in first order recurrence

Summary:
In first order recurrence vectorization, when the previous value is a phi node, we need to
set the insertion point to the first non-phi node.
We can have the previous value being a phi node, due to the generation of new
IVs as part of trunc optimization [1].

[1] https://reviews.llvm.org/rL294967

Reviewers: mssimpso, mkuper

Subscribers: mzolotukhin, llvm-commits

Differential Revision: https://reviews.llvm.org/D32969

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302532 91177308-0d34-0410-b5e6-96231b3b80d8