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Commit 3a99693c authored by Andrew Trick's avatar Andrew Trick
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Improve on r192635, ExeDepsFix for avx, and add a test case. 

rdar:15221834 False AVX register dependencies cause 5x slowdown on
flops-5/6 and significant slowdown on several others.

This was blocking the switch to MI-Sched.

llvm-svn: 192669
parent 9bf87b48
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