LLVM 22 support#4937
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peter-tatrai
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May 6, 2026
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- adds compatibility with LLVM 22.x
- based on Update LLVM to 21.1.2. #4654
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LLVM 21 makes a breaking change in LLVMContext construction: LLVMOrcCreateNewThreadSafeContext() no longer creates an implicit LLVMContext. Instead, a context must be constructed first and then wrapped in a ThreadSafeContext using the new LLVMOrcCreateNewThreadSafeContextFromLLVMContext() API. WAMR still needs to support older LLVM versions (e.g. for xtensa/esp32 support which is only available in at most LLVM 19), so the new code path is guarded with LLVM_VERSION_MAJOR >= 21. Co-authored-by: Peter Tatrai <peter.tatrai.ext@siemens.com> Ref: bytecodealliance#4654
LLVM 22 removes the IntrusiveRefCntPtr<vfs::FileSystem> parameter from the PGOOptions constructor. The VFS was moved to PassBuilder directly (see llvm/llvm-project#160188), allowing all passes that need filesystem access to get it from PassBuilder rather than routing it through PGOOptions. Add LLVM_VERSION_MAJOR version guards to retain the FS argument for LLVM 17-21 while dropping it for LLVM 22+.
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