Andrey Turetskiy 45b22a4aff [X86] Enable RRL part of the LEA optimization pass for -O2. ...

Enable "Remove Redundant LEAs" part of the LEA optimization pass for -O2.
This gives 6.4% performance improve on Broadwell on nnet benchmark from Coremark-pro.
There is no significant effect on other benchmarks (Geekbench, Spec2000, Spec2006).

Differential Revision: http://reviews.llvm.org/D19659

llvm-svn: 270036

2016-05-19 10:18:29 +00:00

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