Jatin Bhateja c61ade1ca0 [SCEV] Handling for ICmp occuring in the evolution chain. ...

Summary:
 If a compare instruction is same or inverse of the compare in the
 branch of the loop latch, then return a constant evolution node.
 This shall facilitate computations of loop exit counts in cases
 where compare appears in the evolution chain of induction variables.

 Will fix PR 34538

Reviewers: sanjoy, hfinkel, junryoungju

Reviewed By: sanjoy, junryoungju

Subscribers: javed.absar, llvm-commits

Differential Revision: https://reviews.llvm.org/D38494

llvm-svn: 318050

2017-11-13 16:43:24 +00:00

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