[all-commits] [llvm/llvm-project] 954e5e: [CIR] Upstream global variable replacement (#184686)

[Andy Kaylor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 954e5e7aa2e23d315a13fc052807d6600b182341
      https://github.com/llvm/llvm-project/commit/954e5e7aa2e23d315a13fc052807d6600b182341
  Author: Andy Kaylor <akaylor at nvidia.com>
  Date:   2026-03-04 (Wed, 04 Mar 2026)

  Changed paths:
    M clang/lib/CIR/CodeGen/CIRGenModule.cpp
    M clang/lib/CIR/CodeGen/CIRGenModule.h
    A clang/test/CIR/CodeGen/replace-global.cpp

  Log Message:
  -----------
  [CIR] Upstream global variable replacement (#184686)

This change upstreams the CIR implementation of global variable
replacement. When we get a call to get or create a global variable using
a type that does not match the previous type for a variable of the same
name, we need to replace the old definition with the new one. In classic
codegen that was as simple as replaceAllUses+eraseFromParent, but in CIR
because we have typed pointers, we need to visit the uses and update
them with bitcasts to reflect the new type.



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