First step towards implementing stack map descriptions for the optimizing compiler.

vm/raw_object.h

Index: vm/raw_object.h
===================================================================
--- vm/raw_object.h	(revision 5450)
+++ vm/raw_object.h	(working copy)
@@ -35,6 +35,7 @@
   V(Code)                                                                      \
   V(Instructions)                                                              \
   V(PcDescriptors)                                                             \
+  V(Bitmap)                                                                    \
   V(LocalVarDescriptors)                                                       \
   V(ExceptionHandlers)                                                         \
   V(Context)                                                                   \
@@ -688,6 +689,18 @@
 };
 
 
+// Bitmap is an immutable representation of a bit map optimized for
+// dense and small bit maps, without any upper bound.
+class RawBitmap : public RawObject {
+  RAW_HEAP_OBJECT_IMPLEMENTATION(Bitmap);
+
+  RawSmi* size_;  // Size of the bit map.

[srdjan, 2012/03/14 17:31:32]

in bits or words?

[siva, 2012/03/14 22:54:20]

size in bytes, I have renamed it accordingly.

On 2012/03/14 17:31:32, srdjan wrote:

+
+  // Variable length data follows here.
+  uint8_t data_[0];
+};
+
+
 class RawLocalVarDescriptors : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(LocalVarDescriptors);
 
@@ -1139,7 +1152,6 @@
   uint8_t data_[0];
 };
 
-
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_