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[InlineCost] Skip volatile loads when looking for repeated loads

Description

[InlineCost] Skip volatile loads when looking for repeated loads

This is a follow-up fix of r320814. A test case is also added.

Details

Committed
haichengDec 19 2017, 5:42 AM
Parents
rL321074: [X86][SSE] Add cpu feature for aggressive combining to variable shuffles
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