================
@@ -52,6 +52,11 @@ void CIRGenerator::Initialize(ASTContext &astContext) {
this->astContext = &astContext;
mlirContext = std::make_unique<mlir::MLIRContext>();
+ // Disable MLIR multithreading: clang::DiagnosticsEngine is not thread-safe,
+ // and the per-context handler installed by CIRGenAction reports diagnostics
+ // straight through it. CIR's pass pipeline is short enough that we don't
+ // miss meaningful parallelism here.
+ mlirContext->disableMultithreading();
----------------
erichkeane wrote:
I think we should, that definitely seems like a more appropriate direction.
https://github.com/llvm/llvm-project/pull/199297
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