[all-commits] [llvm/llvm-project] 36af73: Reapply "[Clang] Enable -fextend-variable-liveness...

[Stephen Tozer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 36af7345dfb8e84a1f2971db34089b63321e8467
      https://github.com/llvm/llvm-project/commit/36af7345dfb8e84a1f2971db34089b63321e8467
  Author: Stephen Tozer <stephen.tozer at sony.com>
  Date:   2025-06-19 (Thu, 19 Jun 2025)

  Changed paths:
    M clang/docs/CommandGuide/clang.rst
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/test/Driver/extend-variable-liveness.c

  Log Message:
  -----------
  Reapply "[Clang] Enable -fextend-variable-liveness at -Og (#118026)"

Relands this feature after several fixes:

* Force fake uses to be emitted before musttail calls (#136867)
* Added soften-float legalization for fake uses (#142714)
* Treat fake uses as size-less instructions in a SystemZ assert (#144390)

If further issues with fake uses are found then this may be reverted again,
but all currently-known issues are resolved.

This reverts commit 2dc6e98169baeb1f73036da0ea50fd828d8323d0.



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