From d7704af439d632eb025bbda3441ccff73668f7a5 Mon Sep 17 00:00:00 2001
From: Maksim Levental <maksim.levental@gmail.com>
Date: Fri, 28 Mar 2025 22:40:30 -0400
Subject: [PATCH] [mlir] fix `maybeReplaceWithConstant` in
 IntRangeOptimizations

---
 .../lib/Dialect/Arith/Transforms/IntRangeOptimizations.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mlir/lib/Dialect/Arith/Transforms/IntRangeOptimizations.cpp b/mlir/lib/Dialect/Arith/Transforms/IntRangeOptimizations.cpp
index 1cb9453ccf3c9..602d80a45993e 100644
--- a/mlir/lib/Dialect/Arith/Transforms/IntRangeOptimizations.cpp
+++ b/mlir/lib/Dialect/Arith/Transforms/IntRangeOptimizations.cpp
@@ -91,8 +91,11 @@ LogicalResult maybeReplaceWithConstant(DataFlowSolver &solver,
   if (!constOp)
     return failure();
 
-  copyIntegerRange(solver, value, constOp->getResult(0));
-  rewriter.replaceAllUsesWith(value, constOp->getResult(0));
+  OpResult res = constOp->getResult(0);
+  if (solver.lookupState<dataflow::IntegerValueRangeLattice>(res))
+    solver.eraseState(res);
+  copyIntegerRange(solver, value, res);
+  rewriter.replaceAllUsesWith(value, res);
   return success();
 }
 } // namespace mlir::dataflow