[all-commits] [llvm/llvm-project] e5bbaa: PPC: Split 64bit target feature into 64bit and 64b...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e5bbaa9c8fb6e06dbcbd39404039cc5d31df4410
      https://github.com/llvm/llvm-project/commit/e5bbaa9c8fb6e06dbcbd39404039cc5d31df4410
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-09-16 (Tue, 16 Sep 2025)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPC.td
    M llvm/lib/Target/PowerPC/PPCSubtarget.cpp
    M llvm/lib/Target/PowerPC/PPCSubtarget.h
    M llvm/test/CodeGen/PowerPC/i64_fp.ll

  Log Message:
  -----------
  PPC: Split 64bit target feature into 64bit and 64bit-support (#157206)

This was being used for 2 different purposes.

The TargetMachine constructor prepends +64bit based on isPPC64
triples as a mode switch. The same feature name was also explicitly
added to different processors, making it impossible to perform a pure
feature check for whether 64-bit mode is enabled ir not. i.e.,
checkFeatures("+64bit") would be true even for ppc32 triples.

The comment in tablegen suggests it's relevant to track which processors
support 64-bit mode independently of whether that's the active compile
target, so replace that with a new feature.



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