llvm-project

ab547095 - [MLGO] Model selection for models lowered through EmitC (#212650)

[MLGO] Model selection for models lowered through EmitC (#212650) This adds support for lowering models through an MLIR based pipeline and selecting between one or more of them. It creates the `-mlgo-model` CLI flag in `MLInlineAdvisor` to select between available models which are configured through the `LLVM_MLGO_MODELS` build flag.