Phoebe Wang 190518da4b [X86] Use generic tuning for "x86-64" if "tune-cpu" is not specified ...

This is an alternative to D129154. See discussions on https://discourse.llvm.org/t/fast-scalar-fsqrt-tuning-in-x86/63605

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D129647

2022-07-15 10:05:08 +08:00

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