From 8741dbefce340531f83820a4d67da1058bb2be28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Lindqvist?= <bjourne@gmail.com>
Date: Tue, 17 Jun 2014 17:22:03 +0200
Subject: [PATCH] VM: bignum_roots traversal code deleted!

---
 vm/data_roots.hpp   | 23 -----------------------
 vm/slot_visitor.hpp | 14 --------------
 vm/vm.hpp           |  1 -
 3 files changed, 38 deletions(-)

diff --git a/vm/data_roots.hpp b/vm/data_roots.hpp
index 9f26556ea0..94be9695d2 100644
--- a/vm/data_roots.hpp
+++ b/vm/data_roots.hpp
@@ -37,27 +37,4 @@ template <typename Type> struct data_root : public tagged<Type> {
   }
 };
 
-/* A similar hack for the bignum implementation */
-struct gc_bignum {
-  bignum** addr;
-  factor_vm* parent;
-
-  gc_bignum(bignum** addr, factor_vm* parent) : addr(addr), parent(parent) {
-    /* Don't bother with variables holding NULL pointers. */
-    if (*addr) {
-      parent->check_data_pointer(*addr);
-      parent->bignum_roots.push_back(addr);
-    }
-  }
-
-  ~gc_bignum() {
-    if (*addr) {
-      FACTOR_ASSERT(parent->bignum_roots.back() == addr);
-      parent->bignum_roots.pop_back();
-    }
-  }
-};
-
-#define GC_BIGNUM(x) gc_bignum x##__data_root(&x, this)
-
 }
diff --git a/vm/slot_visitor.hpp b/vm/slot_visitor.hpp
index 70b121d878..b1d4d4ef6b 100644
--- a/vm/slot_visitor.hpp
+++ b/vm/slot_visitor.hpp
@@ -119,7 +119,6 @@ template <typename Fixup> struct slot_visitor {
   void visit_slots(object* ptr);
   void visit_stack_elements(segment* region, cell* top);
   void visit_data_roots();
-  void visit_bignum_roots();
   void visit_callback_roots();
   void visit_literal_table_roots();
   void visit_roots();
@@ -186,18 +185,6 @@ template <typename Fixup> void slot_visitor<Fixup>::visit_data_roots() {
   }
 }
 
-template <typename Fixup> void slot_visitor<Fixup>::visit_bignum_roots() {
-  std::vector<bignum**>::const_iterator iter =
-      parent->bignum_roots.begin();
-  std::vector<bignum**>::const_iterator end =
-      parent->bignum_roots.end();
-
-  for (; iter < end; iter++) {
-    bignum** ref = *iter;
-    *ref = (bignum*)fixup.fixup_data(*ref);
-  }
-}
-
 template <typename Fixup> struct callback_slot_visitor {
   slot_visitor<Fixup>* visitor;
 
@@ -251,7 +238,6 @@ template <typename Fixup> void slot_visitor<Fixup>::visit_roots() {
   visit_handle(&parent->bignum_neg_one);
 
   visit_data_roots();
-  visit_bignum_roots();
   visit_callback_roots();
   visit_literal_table_roots();
   visit_sample_callstacks();
diff --git a/vm/vm.hpp b/vm/vm.hpp
index 7e5f8359d3..2643cc5eaf 100644
--- a/vm/vm.hpp
+++ b/vm/vm.hpp
@@ -114,7 +114,6 @@ struct factor_vm {
      themselves here. See data_roots.hpp and code_roots.hpp */
 
   std::vector<cell*> data_roots;
-  std::vector<bignum**> bignum_roots;
   std::vector<code_root*> code_roots;
 
   /* Debugger */