Change Details

This patch is an attempt to fix regression https://github.com/llvm/llvm-project/issues/56952 for Clang CodeGen on Windows. It appears that the operand bundle `clang.arc.attachedcall` is not fully supported in the x86_64 backend for Windows. This patch prevents Clang from emitting it in the first place.

Fix regression https://github.com/llvm/llvm-project/issues/56952 for Clang CodeGen on Windows. In the Windows ABI the instruction sequence that is expanded from CALL_RVMARKER should use RCX as target register and not RDI.

This patch is an attempt to fix regression https://github.com/llvm/llvm-project/issues/56952 for Clang CodeGen on Windows. It appears that the operand bundle `clang.arc.attachedcall` is not fully supported in the x86_64 backend forFix regression https://github.com/llvm/llvm-project/issues/56952 for Clang CodeGen on Windows. This patch prevents ClangIn the Windows ABI the instruction sequence that is expanded from emitting it in the first placeCALL_RVMARKER should use RCX as target register and not RDI.