[all-commits] [llvm/llvm-project] 50c52f: [PowerPC] Restore LiveVariables run before PPCTLSD...

[Amy Kwan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 50c52f53edd2fde8d699ce17e7e35edb5e281e85
      https://github.com/llvm/llvm-project/commit/50c52f53edd2fde8d699ce17e7e35edb5e281e85
  Author: Amy Kwan <amy.kwan1 at ibm.com>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPCTargetMachine.cpp
    M llvm/test/CodeGen/PowerPC/O0-pipeline.ll
    M llvm/test/CodeGen/PowerPC/O3-pipeline.ll

  Log Message:
  -----------
  [PowerPC] Restore LiveVariables run before PPCTLSDynamicCallPass (#225816)

This change is a partial revert of 7818c91f7151. Removing the explicit
LiveVariables run before PPCTLSDynamicCallPass causes a crash on ppc64le
-fPIC builds:
```
  fatal error: error in backend: Use not jointly dominated by defs.
```
This change was first added in 2016 with an unresolved FIXME.
Unfortunately, the root cause still needs to be understood and
investigated, so restore this for now to fix the broken buildbots.



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