[flang][HLFIR][NFC] Use tablegen to reduce assignment pass boilerplate

[tblah]

This pass is module-level and then runs on all operations implementing the ordered assignment interface. It should not matter which top-level operation the assignment is inside of.

This commit removes some unnecessary boilerplate that we can generate automatically with tablegen.

[llvmbot]

@llvm/pr-subscribers-flang-fir-hlfir

Author: Tom Eccles (tblah)

Changes

This pass is module-level and then runs on all operations implementing the ordered assignment interface. It should not matter which top-level operation the assignment is inside of.

This commit removes some unnecessary boilerplate that we can generate automatically with tablegen.

---

Full diff: https://github.com/llvm/llvm-project/pull/93030.diff

4 Files Affected:

• (modified) flang/include/flang/Optimizer/HLFIR/Passes.h (-1)
• (modified) flang/include/flang/Optimizer/HLFIR/Passes.td (-1)
• (modified) flang/include/flang/Tools/CLOptions.inc (+1-1)
• (modified) flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIROrderedAssignments.cpp (+3-4)

diff --git a/flang/include/flang/Optimizer/HLFIR/Passes.h b/flang/include/flang/Optimizer/HLFIR/Passes.h
index 5035415ede2d9..e0b4111eed6bf 100644
--- a/flang/include/flang/Optimizer/HLFIR/Passes.h
+++ b/flang/include/flang/Optimizer/HLFIR/Passes.h
@@ -25,7 +25,6 @@ namespace hlfir {
 std::unique_ptr<mlir::Pass> createConvertHLFIRtoFIRPass();
 std::unique_ptr<mlir::Pass> createBufferizeHLFIRPass();
 std::unique_ptr<mlir::Pass> createLowerHLFIRIntrinsicsPass();
-std::unique_ptr<mlir::Pass> createLowerHLFIROrderedAssignmentsPass();
 
 #define GEN_PASS_REGISTRATION
 #include "flang/Optimizer/HLFIR/Passes.h.inc"
diff --git a/flang/include/flang/Optimizer/HLFIR/Passes.td b/flang/include/flang/Optimizer/HLFIR/Passes.td
index 0fe2d9c0a632d..9555467a57adc 100644
--- a/flang/include/flang/Optimizer/HLFIR/Passes.td
+++ b/flang/include/flang/Optimizer/HLFIR/Passes.td
@@ -34,7 +34,6 @@ def LowerHLFIRIntrinsics : Pass<"lower-hlfir-intrinsics", "::mlir::ModuleOp"> {
 
 def LowerHLFIROrderedAssignments : Pass<"lower-hlfir-ordered-assignments", "::mlir::ModuleOp"> {
   let summary = "Lower HLFIR ordered assignments like forall and where operations";
-  let constructor = "hlfir::createLowerHLFIROrderedAssignmentsPass()";
   let options = [
     Option<"tryFusingAssignments", "fuse-assignments",
            "bool", /*default=*/"false",
diff --git a/flang/include/flang/Tools/CLOptions.inc b/flang/include/flang/Tools/CLOptions.inc
index 82a8aece82756..69934281fa992 100644
--- a/flang/include/flang/Tools/CLOptions.inc
+++ b/flang/include/flang/Tools/CLOptions.inc
@@ -327,7 +327,7 @@ inline void createHLFIRToFIRPassPipeline(
     addNestedPassToAllTopLevelOperations(
         pm, hlfir::createOptimizedBufferization);
   }
-  pm.addPass(hlfir::createLowerHLFIROrderedAssignmentsPass());
+  pm.addPass(hlfir::createLowerHLFIROrderedAssignments());
   pm.addPass(hlfir::createLowerHLFIRIntrinsicsPass());
   pm.addPass(hlfir::createBufferizeHLFIRPass());
   pm.addPass(hlfir::createConvertHLFIRtoFIRPass());
diff --git a/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIROrderedAssignments.cpp b/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIROrderedAssignments.cpp
index c9ff4b1c33741..a1a89bb5154fb 100644
--- a/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIROrderedAssignments.cpp
+++ b/flang/lib/Optimizer/HLFIR/Transforms/LowerHLFIROrderedAssignments.cpp
@@ -1383,6 +1383,9 @@ class LowerHLFIROrderedAssignments
     : public hlfir::impl::LowerHLFIROrderedAssignmentsBase<
           LowerHLFIROrderedAssignments> {
 public:
+  using LowerHLFIROrderedAssignmentsBase<
+      LowerHLFIROrderedAssignments>::LowerHLFIROrderedAssignmentsBase;
+
   void runOnOperation() override {
     // Running on a ModuleOp because this pass may generate FuncOp declaration
     // for runtime calls. This could be a FuncOp pass otherwise.
@@ -1409,7 +1412,3 @@ class LowerHLFIROrderedAssignments
   }
 };
 } // namespace
-
-std::unique_ptr<mlir::Pass> hlfir::createLowerHLFIROrderedAssignmentsPass() {
-  return std::make_unique<LowerHLFIROrderedAssignments>();
-}

[jeanPerier]

Thanks