diff --git a/mlir/lib/Dialect/Affine/IR/AffineOps.cpp b/mlir/lib/Dialect/Affine/IR/AffineOps.cpp
--- a/mlir/lib/Dialect/Affine/IR/AffineOps.cpp
+++ b/mlir/lib/Dialect/Affine/IR/AffineOps.cpp
@@ -3807,7 +3807,9 @@
 static ParseResult parseAffineMapWithMinMax(OpAsmParser &parser,
                                             OperationState &result,
                                             MinMaxKind kind) {
-  constexpr llvm::StringLiteral tmpAttrStrName = "__pseudo_bound_map";
+  // Using `const` not `constexpr` below to workaround a MSVC optimizer bug,
+  // see: https://reviews.llvm.org/D134227#3821753
+  const llvm::StringLiteral tmpAttrStrName = "__pseudo_bound_map";
 
   StringRef mapName = kind == MinMaxKind::Min
                           ? AffineParallelOp::getUpperBoundsMapAttrStrName()