[all-commits] [llvm/llvm-project] 0dbb38: [[CIR]] Implement 'to-union' cast. (#191485)

[Erich Keane via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0dbb38adf9afca4f9571e771e30ac24b370b12eb
      https://github.com/llvm/llvm-project/commit/0dbb38adf9afca4f9571e771e30ac24b370b12eb
  Author: Erich Keane <ekeane at nvidia.com>
  Date:   2026-04-13 (Mon, 13 Apr 2026)

  Changed paths:
    M clang/lib/CIR/CodeGen/CIRGenExpr.cpp
    M clang/lib/CIR/CodeGen/CIRGenExprAggregate.cpp
    A clang/test/CIR/CodeGen/cast.c

  Log Message:
  -----------
  [[CIR]] Implement 'to-union' cast. (#191485)

This ends up being pretty trivial/can only really happen in 2 ways, the
only useful way is via an extension. This patch implements this.

This doesn't really affect anything as it is a pretty rarely used
feature and thus doesn't appear in the test suite I've seen, but I saw
it while investigating something else.



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