[all-commits] [llvm/llvm-project] 20d95c: [CIR] Add undef handling to enable global lambdas ...

[Andy Kaylor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 20d95c807092755114fdc8cc3dba49e3f6820eb2
      https://github.com/llvm/llvm-project/commit/20d95c807092755114fdc8cc3dba49e3f6820eb2
  Author: Andy Kaylor <akaylor at nvidia.com>
  Date:   2025-11-26 (Wed, 26 Nov 2025)

  Changed paths:
    M clang/lib/CIR/Dialect/IR/CIRDialect.cpp
    M clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
    M clang/test/CIR/CodeGen/lambda.cpp

  Log Message:
  -----------
  [CIR] Add undef handling to enable global lambdas (#169721)

This change adds undef handling that was needed to enable global
lambdas. There was no lambda-specific code needed, but the global lambda
handling needed to initialize a global with an undef value.

[CIR] Handle undef init of struct

This adds handling for a case where Clang initializes a struct to undef
with a constant copy. This required adding support for undef constants
and lowering undef attributes to LLVM IR.



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