llvm-project

d584d1f1 - [MLIR][LLVMIR] Import unregistered intrinsics via llvm.intrinsic_call (#128626)

[MLIR][LLVMIR] Import unregistered intrinsics via llvm.intrinsic_call (#128626) Currently, the llvm importer can only cover intrinsics that have a first class representation in an MLIR dialect (arm-neon, etc). This PR introduces a fallback mechanism that allow "unregistered" intrinsics to be imported by using the generic `llvm.intrinsic_call` operation. This is useful in several ways: 1. Allows round-trip the LLVM dialect output lowered from other dialects (example: ClangIR) 2. Enables MLIR-linking tools to operate on imported LLVM IR without requiring to add new operations to dozen of different targets (cc @xlauko @smeenai). If multiple dialects implement this interface hook, the last one to register is the one converting all unregistered intrinsics. --------- Co-authored-by: Tobias Gysi <tobias.gysi@nextsilicon.com>