[flang] fix codegen warning from #73641

[jeanPerier]

No description provided.

[llvmbot]

@llvm/pr-subscribers-flang-codegen

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

Author: None (jeanPerier)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/73808.diff

1 Files Affected:

• (modified) flang/lib/Optimizer/CodeGen/CodeGen.cpp (+3-3)

diff --git a/flang/lib/Optimizer/CodeGen/CodeGen.cpp b/flang/lib/Optimizer/CodeGen/CodeGen.cpp
index 38227f5c02a7ca5..408377f1d7a1762 100644
--- a/flang/lib/Optimizer/CodeGen/CodeGen.cpp
+++ b/flang/lib/Optimizer/CodeGen/CodeGen.cpp
@@ -3667,9 +3667,9 @@ struct BoxOffsetOpConversion : public FIROpConversion<fir::BoxOffsetOp> {
     mlir::Type boxType = fir::unwrapRefType(boxOffset.getBoxRef().getType());
     mlir::Type llvmBoxTy =
         lowerTy().convertBoxTypeAsStruct(mlir::cast<fir::BaseBoxType>(boxType));
-    unsigned fieldId = boxOffset.getField() == fir::BoxFieldAttr::derived_type
-                           ? getTypeDescFieldId(boxType)
-                           : kAddrPosInBox;
+    int fieldId = boxOffset.getField() == fir::BoxFieldAttr::derived_type
+                      ? getTypeDescFieldId(boxType)
+                      : kAddrPosInBox;
     rewriter.replaceOpWithNewOp<mlir::LLVM::GEPOp>(
         boxOffset, pty, llvmBoxTy, adaptor.getBoxRef(),
         llvm::ArrayRef<mlir::LLVM::GEPArg>{0, fieldId});

[psteinfeld]

Looks great!

Thanks for the quick fix.