Compute assigned variables and dominance frontiers.

runtime/vm/zone.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ZONE_H_
 #define VM_ZONE_H_
 
 #include "platform/utils.h"
 #include "vm/allocation.h"
 #include "vm/handles.h"
@@ skipping 90 matching lines @@
   // Create an empty zone and set is at the current zone for the Isolate.
   explicit Zone(BaseIsolate* isolate);
 
   // Delete all memory associated with the zone.
   ~Zone();
 
   // Allocate 'size' bytes of memory in the zone; expands the zone by
   // allocating new segments of memory on demand using 'new'.
   uword Allocate(intptr_t size) { return zone_.Allocate(size); }
 
+  // Allocate space for an array of 'length' elements of type T.
+  template <typename T>
+  T* AllocateArray(intptr_t length) {
+    return reinterpret_cast<T*>(Allocate(length * sizeof(T)));
+  }

[srdjan, 2012/05/12 00:00:55]

Remove this code. Do the appropriate allocation computation in BitVector
instead.

[Kevin Millikin (Google), 2012/05/15 11:51:44]

OK, but I'm not sure why.  Avoiding reinterpret_cast and sizeof at the call site
seems like the perfect use of a simple convenience function, and I'd rather not
have to write the same type twice in the expression.

[srdjan, 2012/05/15 22:05:32]

I think there is only one place that needs it, therefore no need to  have it in
a library.

+
   // Allocate 'new_size' bytes of memory and copies 'old_size' bytes from
   // 'data' into new allocated memory. Uses current zone.
   uword Reallocate(uword data, intptr_t old_size, intptr_t new_size) {
     return zone_.Reallocate(data, old_size, new_size);
   }
 
   // Compute the total size of this zone. This includes wasted space that is
   // due to internal fragmentation in the segments.
   intptr_t SizeInBytes() const { return zone_.SizeInBytes(); }
 
@@ skipping 44 matching lines @@
   }
 
   // Check that the result has the proper alignment and return it.
   ASSERT(Utils::IsAligned(result, kAlignment));
   return result;
 }
 
 }  // namespace dart
 
 #endif  // VM_ZONE_H_