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[LV] Prevent LV to run cost model twice for VF=2

Description

[LV] Prevent LV to run cost model twice for VF=2

This is a minor fix for LV cost model, where the cost for VF=2 was
computed twice when the vectorization of the loop was forced without
specifying a VF.

Reviewers: xusx595, hsaito, fhahn, mkuper

Reviewed By: hsaito, xusx595

Differential Revision: https://reviews.llvm.org/D48048

Details

Committed
dcaballeJun 15 2018, 9:21 AM
Reviewer
hsaito
Differential Revision
D48048: [LV] Prevent LV to run cost model twice for VF=2
Parents
rL334839: bpf: recognize target specific option -mattr=dwarfris in clang
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