[all-commits] [llvm/llvm-project] d540eb: [ARM64EC] Avoid emitting unnecessary symbol refere...

[Eli Friedman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d540ebf6cbf97b8bac45af837a741bcb5bd1e1f6
      https://github.com/llvm/llvm-project/commit/d540ebf6cbf97b8bac45af837a741bcb5bd1e1f6
  Author: Eli Friedman <efriedma at quicinc.com>
  Date:   2025-01-21 (Tue, 21 Jan 2025)

  Changed paths:
    M llvm/lib/CodeGen/AsmPrinter/WinCFGuard.cpp
    A llvm/test/CodeGen/AArch64/cfguard-arm64ec.ll

  Log Message:
  -----------
  [ARM64EC] Avoid emitting unnecessary symbol references with /guard:cf. (#123235)

.gfids$y contains a list of indirect calls for Control Flow Guard. This
wasn't working properly for ARM64EC: direct calls were being treated as
indirect calls. Make sure we correctly filter out direct calls.

This improves the protection from Control Flow Guard, and also fixes a
link error when using certain functions from oldnames.lib.



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