[Mlir-commits] [mlir] [MLIR][Python] fix generated value builder type hints (PR #158449)

[Maksim Levental]

https://github.com/makslevental updated https://github.com/llvm/llvm-project/pull/158449

>From 7cf81a03d4e749dd3efab7cafecc075c2d5754fb Mon Sep 17 00:00:00 2001
From: Maksim Levental <maksim.levental at gmail.com>
Date: Sat, 13 Sep 2025 20:56:40 -0400
Subject: [PATCH] [MLIR][Python] fix generated value builder type hints

---
 mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp | 38 +++++++------------
 1 file changed, 13 insertions(+), 25 deletions(-)

diff --git a/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp b/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
index 6a7aa9e3432d5..8fa735a8d362d 100644
--- a/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
@@ -36,7 +36,6 @@ from ._ods_common import _cext as _ods_cext
 from ._ods_common import (
     equally_sized_accessor as _ods_equally_sized_accessor,
     get_default_loc_context as _ods_get_default_loc_context,
-    get_op_result_or_op_results as _get_op_result_or_op_results,
     get_op_results_or_values as _get_op_results_or_values,
     segmented_accessor as _ods_segmented_accessor,
 )
@@ -275,11 +274,6 @@ def {0}({2}) -> {4}:
   return {1}({3}){5}
 )Py";
 
-constexpr const char *valueBuilderVariadicTemplate = R"Py(
-def {0}({2}) -> {4}:
-  return _get_op_result_or_op_results({1}({3}))
-)Py";
-
 static llvm::cl::OptionCategory
     clOpPythonBindingCat("Options for -gen-python-op-bindings");
 
@@ -1013,25 +1007,19 @@ static void emitValueBuilder(const Operator &op,
     nameWithoutDialect += "_";
   std::string params = llvm::join(valueBuilderParams, ", ");
   std::string args = llvm::join(opBuilderArgs, ", ");
-  const char *type =
-      (op.getNumResults() > 1
-           ? "_Sequence[_ods_ir.Value]"
-           : (op.getNumResults() > 0 ? "_ods_ir.Value" : "_ods_ir.Operation"));
-  if (op.getNumVariableLengthResults() > 0) {
-    os << formatv(valueBuilderVariadicTemplate, nameWithoutDialect,
-                  op.getCppClassName(), params, args, type);
-  } else {
-    const char *results;
-    if (op.getNumResults() == 0) {
-      results = "";
-    } else if (op.getNumResults() == 1) {
-      results = ".result";
-    } else {
-      results = ".results";
-    }
-    os << formatv(valueBuilderTemplate, nameWithoutDialect,
-                  op.getCppClassName(), params, args, type, results);
-  }
+  std::string type =
+      (op.getNumResults() > 1 || op.getNumVariableLengthResults())
+          ? "_ods_ir.OpResultList"
+      : op.getNumResults() == 1
+          ? "_ods_ir.OpResult"
+          : /*op.getNumResults() == 0*/ op.getCppClassName().str();
+  const char *results = "";
+  if (op.getNumResults() > 1)
+    results = ".results";
+  else if (op.getNumResults() == 1)
+    results = ".result";
+  os << formatv(valueBuilderTemplate, nameWithoutDialect, op.getCppClassName(),
+                params, args, type, results);
 }
 
 /// Emits bindings for a specific Op to the given output stream.