llvm-project

2a9b623c - [clang-repl] Honor `-emit-llvm` to print incremental IR (#217870)

[clang-repl] Honor `-emit-llvm` to print incremental IR (#217870) clang-repl cannot currently emit the LLVM IR it generates. The command-line emit actions are accepted but folded into `EmitLLVMOnlyAction` (producing no output), and `frontend::EmitLLVM` is rejected by the incremental frontend action when `-emit-llvm` is passed. This prevents users from inspecting IR produced per-input PTU. This patch teaches clang-repl to honor `-emit-llvm` by allowing the IncrementalAction to accept `frontend::EmitLLVM` , making the driver print each input's `llvm::Modul` to stdout instead of executing it, similar to `clang -emit-llvm`. This enables a lit-level test to FileCheck the IR produced by clang-repl and the effect of a statement on it. Exposing this functionality beyond the driver level to allow library consumers of `clang::Interpreter` to use it is a planned follow-up.