[flang][NFC] Use tablegen to reduce AddAliasTags boilerplate (#92373)

I will make this pass run properly on more top-level operations in a
follow up patch.

Author: tblah

flang/include/flang/Optimizer/Transforms/Passes.h

@@ -49,6 +49,7 @@ namespace fir {
 #define GEN_PASS_DECL_ADDDEBUGINFO
 #define GEN_PASS_DECL_STACKARRAYS
 #define GEN_PASS_DECL_LOOPVERSIONING
+#define GEN_PASS_DECL_ADDALIASTAGS
 #include "flang/Optimizer/Transforms/Passes.h.inc"
 
 std::unique_ptr<mlir::Pass> createAffineDemotionPass();
@@ -60,7 +61,6 @@ std::unique_ptr<mlir::Pass>
 createExternalNameConversionPass(bool appendUnderscore);
 std::unique_ptr<mlir::Pass> createMemDataFlowOptPass();
 std::unique_ptr<mlir::Pass> createPromoteToAffinePass();
-std::unique_ptr<mlir::Pass> createAliasTagsPass();
 std::unique_ptr<mlir::Pass>
 createAddDebugInfoPass(fir::AddDebugInfoOptions options = {});
 

flang/include/flang/Optimizer/Transforms/Passes.td

@@ -278,7 +278,6 @@ def AddAliasTags : Pass<"fir-add-alias-tags", "mlir::ModuleOp"> {
     aren't races adding new tags to the mlir context.
   }];
   let dependentDialects = [ "fir::FIROpsDialect" ];
-  let constructor = "::fir::createAliasTagsPass()";
 }
 
 def SimplifyRegionLite : Pass<"simplify-region-lite", "mlir::ModuleOp"> {

flang/include/flang/Tools/CLOptions.inc

@@ -294,7 +294,7 @@ inline void createDefaultFIROptimizerPassPipeline(
   pm.addPass(fir::createPolymorphicOpConversion());
 
   if (pc.AliasAnalysis && !disableFirAliasTags && !useOldAliasTags)
-    pm.addPass(fir::createAliasTagsPass());
+    pm.addPass(fir::createAddAliasTags());
 
   // convert control flow to CFG form
   fir::addCfgConversionPass(pm, pc);

flang/lib/Optimizer/Transforms/AddAliasTags.cpp

@@ -227,7 +227,3 @@ void AddAliasTagsPass::runOnOperation() {
 
   LLVM_DEBUG(llvm::dbgs() << "=== End " DEBUG_TYPE " ===\n");
 }
-
-std::unique_ptr<mlir::Pass> fir::createAliasTagsPass() {
-  return std::make_unique<AddAliasTagsPass>();
-}