[clang] 8639b36 - [CIR] Make UndefAttr use AttrBuilderWithInferredContext (#136605)

[via cfe-commits]

Author: Henrich Lauko
Date: 2025-04-22T09:08:49+02:00
New Revision: 8639b365a5988932973a82ffe5e620a9c8ef9039

URL: https://github.com/llvm/llvm-project/commit/8639b365a5988932973a82ffe5e620a9c8ef9039
DIFF: https://github.com/llvm/llvm-project/commit/8639b365a5988932973a82ffe5e620a9c8ef9039.diff

LOG: [CIR] Make UndefAttr use AttrBuilderWithInferredContext (#136605)

This mirrors incubator changes from https://github.com/llvm/clangir/pull/1577

Added: 
    

Modified: 
    clang/include/clang/CIR/Dialect/IR/CIRAttrs.td
    clang/lib/CIR/Dialect/IR/CIRMemorySlot.cpp

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/CIR/Dialect/IR/CIRAttrs.td b/clang/include/clang/CIR/Dialect/IR/CIRAttrs.td
index 214db1b1caeeb..dfe15a10fa54e 100644
--- a/clang/include/clang/CIR/Dialect/IR/CIRAttrs.td
+++ b/clang/include/clang/CIR/Dialect/IR/CIRAttrs.td
@@ -93,6 +93,13 @@ def UndefAttr : CIR_Attr<"Undef", "undef", [TypedAttrInterface]> {
   }];
 
   let parameters = (ins AttributeSelfTypeParameter<"">:$type);
+
+  let builders = [
+    AttrBuilderWithInferredContext<(ins "mlir::Type":$type), [{
+      return $_get(type.getContext(), type);
+    }]>
+  ];
+
   let assemblyFormat = [{}];
 }
 

diff  --git a/clang/lib/CIR/Dialect/IR/CIRMemorySlot.cpp b/clang/lib/CIR/Dialect/IR/CIRMemorySlot.cpp
index 9cd5c54e6c19e..fe8a5e7428a81 100644
--- a/clang/lib/CIR/Dialect/IR/CIRMemorySlot.cpp
+++ b/clang/lib/CIR/Dialect/IR/CIRMemorySlot.cpp
@@ -34,8 +34,8 @@ llvm::SmallVector<MemorySlot> cir::AllocaOp::getPromotableSlots() {
 
 Value cir::AllocaOp::getDefaultValue(const MemorySlot &slot,
                                      OpBuilder &builder) {
-  return builder.create<cir::ConstantOp>(
-      getLoc(), slot.elemType, builder.getAttr<cir::UndefAttr>(slot.elemType));
+  return builder.create<cir::ConstantOp>(getLoc(), slot.elemType,
+                                         cir::UndefAttr::get(slot.elemType));
 }
 
 void cir::AllocaOp::handleBlockArgument(const MemorySlot &slot,