[Mlir-commits] [mlir] [TableGen] Use getValue instead of getInt for enum attributes (PR #144030)

[Mihir Patil]

https://github.com/0xMihir updated https://github.com/llvm/llvm-project/pull/144030

>From 0978e13b6c02ba60522ba5b106539043233c9e97 Mon Sep 17 00:00:00 2001
From: Mihir Patil <me at mihirpatil.me>
Date: Fri, 13 Jun 2025 01:18:46 -0700
Subject: [PATCH] [TableGen] Use getValue instead of getInt for enum attributes
 getInt is deprecated. We can instead compare APInt for the predicate and
 getZExtValue to return the underlying data

---
 mlir/include/mlir/IR/EnumAttr.td           | 5 +++--
 mlir/test/IR/attribute.mlir                | 4 ++++
 mlir/test/lib/Dialect/Test/TestEnumDefs.td | 8 ++++++--
 mlir/tools/mlir-tblgen/EnumsGen.cpp        | 6 ++++--
 4 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/mlir/include/mlir/IR/EnumAttr.td b/mlir/include/mlir/IR/EnumAttr.td
index 3f7f747ac20d3..7049116d59344 100644
--- a/mlir/include/mlir/IR/EnumAttr.td
+++ b/mlir/include/mlir/IR/EnumAttr.td
@@ -39,8 +39,9 @@ class EnumCase<string sym, int intVal, string strVal, int widthVal> {
 class IntEnumAttrCaseBase<I intType, string sym, string strVal, int intVal> :
     EnumCase<sym, intVal, strVal, intType.bitwidth>,
     SignlessIntegerAttrBase<intType, "case " # strVal> {
-  let predicate =
-    CPred<"::llvm::cast<::mlir::IntegerAttr>($_self).getInt() == " # intVal>;
+  let predicate = CPred<
+      "::llvm::cast<::mlir::IntegerAttr>($_self).getValue().eq(::llvm::APInt("#intType
+          .bitwidth#", "#intVal#"))">;
 }
 
 // Cases of integer enums with a specific type. By default, the string
diff --git a/mlir/test/IR/attribute.mlir b/mlir/test/IR/attribute.mlir
index 4f280bde1aecc..edb7357e4e04b 100644
--- a/mlir/test/IR/attribute.mlir
+++ b/mlir/test/IR/attribute.mlir
@@ -454,6 +454,10 @@ func.func @allowed_cases_pass() {
   %0 = "test.i32_enum_attr"() {attr = 5: i32} : () -> i32
   // CHECK: test.i32_enum_attr
   %1 = "test.i32_enum_attr"() {attr = 10: i32} : () -> i32
+  // CHECK: test.i32_enum_attr
+  %2 = "test.i32_enum_attr"() {attr = 2147483648: i32} : () -> i32
+  // CHECK: test.i32_enum_attr
+  %3 = "test.i32_enum_attr"() {attr = 4294967295: i32} : () -> i32
   return
 }
 
diff --git a/mlir/test/lib/Dialect/Test/TestEnumDefs.td b/mlir/test/lib/Dialect/Test/TestEnumDefs.td
index 5b785a600aad2..10e424a0f2523 100644
--- a/mlir/test/lib/Dialect/Test/TestEnumDefs.td
+++ b/mlir/test/lib/Dialect/Test/TestEnumDefs.td
@@ -17,9 +17,13 @@ include "mlir/IR/EnumAttr.td"
 
 def I32Case5:  I32EnumAttrCase<"case5", 5>;
 def I32Case10: I32EnumAttrCase<"case10", 10>;
+def I32CaseSignedMaxPlusOne
+    : I32EnumAttrCase<"caseSignedMaxPlusOne", 2147483648>;
+def I32CaseUnsignedMax : I32EnumAttrCase<"caseUnsignedMax", 4294967295>;
 
-def SomeI32Enum: I32EnumAttr<
-  "SomeI32Enum", "", [I32Case5, I32Case10]>;
+def SomeI32Enum : I32EnumAttr<"SomeI32Enum", "",
+                              [I32Case5, I32Case10, I32CaseSignedMaxPlusOne,
+                               I32CaseUnsignedMax]>;
 
 def I64Case5:  I64EnumAttrCase<"case5", 5>;
 def I64Case10: I64EnumAttrCase<"case10", 10>;
diff --git a/mlir/tools/mlir-tblgen/EnumsGen.cpp b/mlir/tools/mlir-tblgen/EnumsGen.cpp
index 9941a203bc5cb..06dc588f90203 100644
--- a/mlir/tools/mlir-tblgen/EnumsGen.cpp
+++ b/mlir/tools/mlir-tblgen/EnumsGen.cpp
@@ -648,8 +648,10 @@ static void emitSpecializedAttrDef(const Record &enumDef, raw_ostream &os) {
 
   os << formatv("{0} {1}::getValue() const {{\n", enumName, attrClassName);
 
-  os << formatv("  return static_cast<{0}>(::mlir::IntegerAttr::getInt());\n",
-                enumName);
+  os << formatv(
+      "  return "
+      "static_cast<{0}>(::mlir::IntegerAttr::getValue().getZExtValue());\n",
+      enumName);
 
   os << "}\n";
 }