[PATCH] D32780: [AArch64] Make the TargetParser add CPU exts provided by the arch.

[Ahmed Bougacha via Phabricator via llvm-commits]

ab created this revision.
Herald added a subscriber: aemerson.

Otherwise, each CPU has to manually specify the extensions it supports,
even though they have to be a superset of the base arch extensions.
And when there's redundant data there's stale data, so most of the CPUs
lie about the features they support (most don't list AEK_FP).

      

Instead, do the saner thing: add the optional extensions on top of the
base extensions provided by the architecture.

      

The ARM TargetParser has the same behavior.


https://reviews.llvm.org/D32780

Files:
  include/llvm/Support/AArch64TargetParser.def
  lib/Support/TargetParser.cpp
  unittests/Support/TargetParserTest.cpp

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