[all-commits] [llvm/llvm-project] 729480: [CIR] Generalize cxx alloc new size handling (#187...

[Andy Kaylor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 729480c4aec6ea8a18149fd3c73de57aaa677d2a
      https://github.com/llvm/llvm-project/commit/729480c4aec6ea8a18149fd3c73de57aaa677d2a
  Author: Andy Kaylor <akaylor at nvidia.com>
  Date:   2026-03-23 (Mon, 23 Mar 2026)

  Changed paths:
    M clang/lib/CIR/CodeGen/CIRGenExprCXX.cpp
    M clang/lib/CIR/CodeGen/CIRGenFunction.cpp
    M clang/lib/CIR/CodeGen/CIRGenFunction.h
    A clang/test/CIR/CodeGen/cleanup-scope-return-in-loop.cpp
    A clang/test/CIR/CodeGen/new-array-size-conv.cpp

  Log Message:
  -----------
  [CIR] Generalize cxx alloc new size handling (#187790)

The non-constant size handling in `emitCXXNewAllocSize` was making the
incorrect assumption that the default behavior of the size value being
explicitly cast to size_t would be the only behavior we'd see. This is
actually only true with C++14 and later. To properly handle earlier
standards, we need the more robust checking that classic codegen does in
the equivalent function. This change adds that handling.

Assisted-by: Cursor / claude-4.6-opus-high



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