[all-commits] [llvm/llvm-project] 389621: [CIR] Implement Target-specific address space hand...

[David Rivera via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3896212ceab8fe963335e8a31b898b6099292c88
      https://github.com/llvm/llvm-project/commit/3896212ceab8fe963335e8a31b898b6099292c88
  Author: David Rivera <davidriverg at gmail.com>
  Date:   2025-10-03 (Fri, 03 Oct 2025)

  Changed paths:
    M clang/include/clang/CIR/Dialect/Builder/CIRBaseBuilder.h
    M clang/include/clang/CIR/Dialect/IR/CIRAttrs.h
    M clang/include/clang/CIR/Dialect/IR/CIRAttrs.td
    M clang/include/clang/CIR/Dialect/IR/CIRTypes.h
    M clang/include/clang/CIR/Dialect/IR/CIRTypes.td
    M clang/include/clang/CIR/MissingFeatures.h
    M clang/lib/CIR/CodeGen/CIRGenExpr.cpp
    M clang/lib/CIR/CodeGen/CIRGenModule.cpp
    M clang/lib/CIR/CodeGen/CIRGenTypeCache.h
    M clang/lib/CIR/CodeGen/CIRGenTypes.cpp
    M clang/lib/CIR/CodeGen/TargetInfo.h
    M clang/lib/CIR/Dialect/IR/CIRAttrs.cpp
    M clang/lib/CIR/Dialect/IR/CIRTypes.cpp
    M clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
    A clang/test/CIR/CodeGen/address-space.c
    A clang/test/CIR/IR/invalid-addrspace.cir

  Log Message:
  -----------
  [CIR] Implement Target-specific address space handling support for `PointerType` (#161028)

This PR adds support for address spaces in CIR pointer types by:

1. Introducing a `TargetAddressSpaceAttr` to represent target-specific
numeric address spaces (A Lang-specific attribute is to be implemented
in a different PR)
2. Extending the `PointerType` to include an optional address space
parameter
3. Adding helper methods in `CIRBaseBuilder` to create pointers with
address spaces
4. Implementing custom parsers and printers for address space attributes
5. Updating the LLVM lowering to properly handle address spaces when
converting CIR to LLVM IR

The implementation allows for creating pointers with specific address
spaces, which is necessary for supporting language features like Clang's
`__attribute__((address_space(N)))`. Address spaces are preserved
through the CIR representation and correctly lowered to LLVM IR.



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