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[IR] Split out target specific intrinsic enums into separate headers

Authored by rnk on Dec 11 2019, 7:55 AM.

Description

[IR] Split out target specific intrinsic enums into separate headers

This has two main effects:

  • Optimizes debug info size by saving 221.86 MB of obj file size in a Windows optimized+debug build of 'all'. This is 3.03% of 7,332.7MB of object file size.
  • Incremental step towards decoupling target intrinsics.

The enums are still compact, so adding and removing a single
target-specific intrinsic will trigger a rebuild of all of LLVM.
Assigning distinct target id spaces is potential future work.

Part of PR34259

Reviewers: efriedma, echristo, MaskRay

Reviewed By: echristo, MaskRay

Differential Revision: https://reviews.llvm.org/D71320

Details