[flang-commits] [flang] [flang] Add the MLIR pass pipelines for dumping (PR #183144)

[via flang-commits]

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@@ -207,6 +214,23 @@ bool executeCompilerInvocation(CompilerInstance *flang) {
 
   // Honor -mmlir. This should happen AFTER plugins have been loaded!
   if (!flang->getFrontendOpts().mlirArgs.empty()) {
+    // Register MLIR and FIR passes so that --mlir-print-ir-before=<pass> works.
+    // This must happen BEFORE registerPassManagerCLOptions() because that
+    // function creates the PassNameCLParser which snapshots the pass registry
+    // during initialization.
+    mlir::registerCSEPass();
+    mlir::registerCanonicalizerPass();
+    mlir::registerInlinerPass();
+    mlir::registerSCFToControlFlowPass();
+    mlir::registerConvertMathToFuncs();
+    mlir::registerConvertComplexToStandardPass();
+    mlir::registerConvertMathToLLVMPass();
+    mlir::LLVM::registerLLVMAddComdats();
+    mlir::registerReconcileUnrealizedCastsPass();
+    fir::registerOptCodeGenPasses();
+    fir::registerOptTransformPasses();
+    hlfir::registerHLFIRPasses();
+    flangomp::registerFlangOpenMPPasses();
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tmjbios wrote:

OOoh. That's a great question - thanks. I hadn't looked at fir-opt. I'm sure I could do something to commonize this. Let me play with this for a day or so.

https://github.com/llvm/llvm-project/pull/183144