ssa_lazy_cache takes an optional bitmap_obstack pointer.

Allow ssa_lazy cache to allocate bitmaps from a client provided obstack
if so desired.

	* gimple-range-cache.cc (ssa_lazy_cache::ssa_lazy_cache): Relocate here.
	Check for provided obstack.
	(ssa_lazy_cache::~ssa_lazy_cache): Relocate here.  Free bitmap or obstack.
	* gimple-range-cache.h (ssa_lazy_cache::ssa_lazy_cache): Move.
	(ssa_lazy_cache::~ssa_lazy_cache): Move.
	(ssa_lazy_cache::m_ob): New.
	* gimple-range.cc (dom_ranger::dom_ranger): Iniitialize obstack.
	(dom_ranger::~dom_ranger): Release obstack.
	(dom_ranger::pre_bb): Create ssa_lazy_cache using obstack.
	* gimple-range.h (m_bitmaps): New.

1 files changed, 3 insertions, 6 deletions

diff --git a/gcc/gimple-range-cache.h b/gcc/gimple-range-cache.h
index 0ea34d3..539c067 100644
--- a/gcc/gimple-range-cache.h
+++ b/gcc/gimple-range-cache.h
@@ -78,12 +78,8 @@ protected:
 class ssa_lazy_cache : public ssa_cache
 {
 public:
-  inline ssa_lazy_cache ()
-  {
-    bitmap_obstack_initialize (&m_bitmaps);
-    active_p = BITMAP_ALLOC (&m_bitmaps);
-  }
-  inline ~ssa_lazy_cache () { bitmap_obstack_release (&m_bitmaps); }
+  ssa_lazy_cache (bitmap_obstack *ob = NULL);
+  ~ssa_lazy_cache ();
   inline bool empty_p () const { return bitmap_empty_p (active_p); }
   virtual bool has_range (tree name) const;
   virtual bool set_range (tree name, const vrange &r);
@@ -94,6 +90,7 @@ public:
   void merge (const ssa_lazy_cache &);
 protected:
   bitmap_obstack m_bitmaps;
+  bitmap_obstack *m_ob;
   bitmap active_p;
 };