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authorAndrew Rogers <andrurogerz@gmail.com>2025-06-11 09:19:13 -0700
committerGitHub <noreply@github.com>2025-06-11 09:19:13 -0700
commit8f8ed23c6247e9c1dd2df4494930813b353c52c4 (patch)
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parent5188bea9afac859fa6523e07d98748527c295aaf (diff)
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[llvm] annotate interfaces in llvm/SandboxIR for DLL export (#142863)
## Purpose This patch is one in a series of code-mods that annotate LLVM’s public interface for export. This patch annotates the `llvm/SandboxIR` library. These annotations currently have no meaningful impact on the LLVM build; however, they are a prerequisite to support an LLVM Windows DLL (shared library) build. ## Background This effort is tracked in #109483. Additional context is provided in [this discourse](https://discourse.llvm.org/t/psa-annotating-llvm-public-interface/85307), and documentation for `LLVM_ABI` and related annotations is found in the LLVM repo [here](https://github.com/llvm/llvm-project/blob/main/llvm/docs/InterfaceExportAnnotations.rst). The bulk of these changes were generated automatically using the [Interface Definition Scanner (IDS)](https://github.com/compnerd/ids) tool, followed formatting with `git clang-format`. The following manual adjustments were also applied after running IDS on Linux: - Remove explicit `GlobalWithNodeAPI::LLVMGVToGV::operator()` template function instantiations that were previously added for the dylib build. Instead, directly annotate the `LLVMGVToGV::operator()` method with `LLVM_ABI`. This is done so the DLL build works with both MSVC and clang-cl. - Explicitly `#include "llvm/SandboxIR/Value.h"` in `Tracker.h` so that the symbol is available for exported templates in this file. These templates get fully instantiated on DLL export, so they require the full definition of `Value`. - Add extern template instantiation declarations for `GlobalWithNodeAPI` template types in `Constants.h` and annotate them with `LLVM_TEMPLATE_ABI`. - Add `LLVM_EXPORT_TEMPLATE` to `GlobalWithNodeAPI` template instantiations in `Constants.cpp`. ## Validation Local builds and tests to validate cross-platform compatibility. This included llvm, clang, and lldb on the following configurations: - Windows with MSVC - Windows with Clang - Linux with GCC - Linux with Clang - Darwin with Clang
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