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GHC should bump it's required feature set for CPUs on x86 to `x86-64-v2`

Summary

GHC should bump it's required feature set for CPUs on x86 to x86-64-v2 (https://en.wikipedia.org/wiki/X86-64#Microarchitecture_levels) CPU feature.

We could could add support for configuring/building GHC for higher levels than that as well for distributors.

Expected behavior

GHC should take advantage of the features offered by x86-64-v2.

Environment

  • GHC version used:

Optional:

  • Operating System:
  • System Architecture:
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