[CostModel][ARM] Increase cost of insert/extract operations

Summary:
This change limits the minimum cost of an insert/extract
element operation to 2 in cases where this would result
in mixing of NEON and VFP code.

Reviewers: rengolin

Subscribers: mssimpso, aemerson, llvm-commits, rengolin

Differential Revision: http://reviews.llvm.org/D12030

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245225 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed