+
+ /// In LLVM 1.3 format, the identifier and the size of the block are
+ /// encoded into a single vbr_uint32 with 5 bits for the block identifier
+ /// and 27-bits for block length. This limits blocks to a maximum of
+ /// 128MBytes of data, and block types to 31 which should be sufficient
+ /// for the foreseeable usage. Because the values of block identifiers MUST
+ /// fit within 5 bits (values 1-31), this enumeration is used to ensure
+ /// smaller values are used for 1.3 and subsequent bytecode versions.
+ /// @brief The block number identifiers used in LLVM 1.3 bytecode
+ /// format.
+ enum CompressedBytecodeBlockIdentifiers {
+
+ // Zero value ist verbotten!
+ Reserved_DoNotUse = 0x00, ///< Don't use this!
+
+ // This is the uber block that contains the rest of the blocks.
+ ModuleBlockID = 0x01, ///< 1.3 identifier for modules
+
+ // Module subtypes:
+
+ // This is the identifier for a function
+ FunctionBlockID = 0x02, ///< 1.3 identifier for Functions
+ ConstantPoolBlockID = 0x03, ///< 1.3 identifier for constant pool
+ SymbolTableBlockID = 0x04, ///< 1.3 identifier for symbol table
+ ModuleGlobalInfoBlockID = 0x05,///< 1.3 identifier for module globals
+ GlobalTypePlaneBlockID = 0x06, ///< 1.3 identifier for global types
+
+ // Function subtypes:
+
+ // InstructionList - The instructions in the body of a function. This
+ // superceeds the old BasicBlock node used in LLVM 1.0.
+ InstructionListBlockID = 0x07, ///< 1.3 identifier for insruction list
+
+ // CompactionTable - blocks with this id are used to define local remapping
+ // tables for a function, allowing the indices used within the function to
+ // be as small as possible. This often allows the instructions to be
+ // encoded more efficiently.
+ CompactionTableBlockID = 0x08, ///< 1.3 identifier for compaction tables
+
+ // Not a block id, just used to count them
+ NumberOfBlockIDs
+ };
+