Add missing const in IndexingMap constructor.

PiperOrigin-RevId: 648281250

Author: jreiffers

third_party/xla/xla/service/gpu/model/indexing_map.cc

@@ -943,7 +943,7 @@ std::vector<RangeVar> RangeVarsFromTensorSizes(
 IndexingMap::IndexingMap(
     AffineMap affine_map, std::vector<DimVar> dimensions,
     std::vector<RangeVar> range_vars, std::vector<RTVar> rt_vars,
-    absl::Span<std::pair<AffineExpr, Interval>> constraints)
+    absl::Span<std::pair<AffineExpr, Interval> const> constraints)
     : affine_map_(affine_map),
       dim_vars_(std::move(dimensions)),
       range_vars_(std::move(range_vars)),

third_party/xla/xla/service/gpu/model/indexing_map.h

@@ -263,7 +263,7 @@ class IndexingMap {
   IndexingMap(
       mlir::AffineMap affine_map, std::vector<DimVar> dimensions,
       std::vector<RangeVar> range_vars, std::vector<RTVar> rt_vars,
-      absl::Span<std::pair<mlir::AffineExpr, Interval>> constraints = {});
+      absl::Span<std::pair<mlir::AffineExpr, Interval> const> constraints = {});
 
   IndexingMap(mlir::AffineMap affine_map, std::vector<DimVar> dimensions,
               std::vector<RangeVar> range_vars, std::vector<RTVar> rt_vars,