[all-commits] [llvm/llvm-project] bff94d: [CIR] Emit allocas into the proper lexical scope (...

[Andy Kaylor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bff94d774cda03e43aff1cdf6e4945136bbab3d7
      https://github.com/llvm/llvm-project/commit/bff94d774cda03e43aff1cdf6e4945136bbab3d7
  Author: Andy Kaylor <akaylor at nvidia.com>
  Date:   2025-03-25 (Tue, 25 Mar 2025)

  Changed paths:
    M clang/include/clang/CIR/Dialect/Passes.h
    M clang/include/clang/CIR/Dialect/Passes.td
    M clang/include/clang/CIR/MissingFeatures.h
    M clang/lib/CIR/CodeGen/CIRGenDecl.cpp
    M clang/lib/CIR/CodeGen/CIRGenExpr.cpp
    M clang/lib/CIR/CodeGen/CIRGenFunction.cpp
    M clang/lib/CIR/CodeGen/CIRGenFunction.h
    M clang/lib/CIR/Dialect/Transforms/CMakeLists.txt
    A clang/lib/CIR/Dialect/Transforms/HoistAllocas.cpp
    M clang/lib/CIR/Lowering/CIRPasses.cpp
    M clang/test/CIR/CodeGen/loop.cpp
    A clang/test/CIR/Transforms/hoist-allocas.cir
    M clang/tools/cir-opt/cir-opt.cpp

  Log Message:
  -----------
  [CIR] Emit allocas into the proper lexical scope (#132468)

Alloca operations were being emitted into the entry block of the current
function unconditionally, even if the variable they represented was
declared in a different scope. This change upstreams the code for
handling
insertion of the alloca into the proper lexcial scope. It also adds a
CIR-to-CIR transformation to hoist allocas to the function entry block,
which is necessary to produce the expected LLVM IR during lowering.



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