borrowck: Avoid overloading issues on 32bit architectures

On architectures where `size_t` is `unsigned int`, such as 32bit x86,
we encounter an issue with `PlaceId` and `FreeRegion` being aliases to
the same types. This poses an issue for overloading functions for these
two types, such as `push_subset` in that case. This commit renames one
of these `push_subset` functions to avoid the issue, but this should be
fixed with a newtype pattern for these two types.

gcc/rust/ChangeLog:

	* checks/errors/borrowck/rust-bir-fact-collector.h (points): Rename
	`push_subset(PlaceId, PlaceId)` to `push_subset_place(PlaceId, PlaceId)`

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc/rust/checks/errors/borrowck/rust-bir-fact-collector.h b/gcc/rust/checks/errors/borrowck/rust-bir-fact-collector.h
index bb8feda..6601c98 100644
--- a/gcc/rust/checks/errors/borrowck/rust-bir-fact-collector.h
+++ b/gcc/rust/checks/errors/borrowck/rust-bir-fact-collector.h
@@ -334,7 +334,7 @@ protected: // Main collection entry points (for different categories).
 		expr.get_rhs () - 1, current_bb, current_stmt);
 
     issue_read_move (expr.get_rhs ());
-    push_subset (lhs, expr.get_rhs ());
+    push_place_subset (lhs, expr.get_rhs ());
   }
 
   void visit (const CallExpr &expr) override
@@ -660,7 +660,7 @@ protected: // Subset helpers.
       }
   }
 
-  void push_subset (PlaceId lhs, PlaceId rhs)
+  void push_place_subset (PlaceId lhs, PlaceId rhs)
   {
     auto &lhs_place = place_db[lhs];
     auto &rhs_place = place_db[rhs];