[flang-commits] [flang] [flang][NFCI]Use config structure for MLIR to LLVM pass creation (PR #67792)

[Tom Eccles via flang-commits]

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@@ -18,6 +18,24 @@
 
 #include "mlir/Dialect/OpenMP/OpenMPDialect.h"
 #include "mlir/IR/BuiltinOps.h"
+#include "llvm/Frontend/Debug/Options.h"
+#include "llvm/Passes/OptimizationLevel.h"
+
+/// Configuriation for the MLIR to LLVM pass pipeline.
+struct MLIRToLLVMPassPipelineConfig {
+  MLIRToLLVMPassPipelineConfig(llvm::OptimizationLevel level) {
+    OptLevel = level;
+    StackArrays = false;
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tblah wrote:

I also added `explicit` to MLIRToLLVMPassPipelineConfig to prevent automatic conversion from an `llvm::OptimizationLevel`.

https://github.com/llvm/llvm-project/pull/67792