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+llvm-bcanalyzer - LLVM bitcode analyzer
+=======================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-bcanalyzer** [*options*] [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-bcanalyzer** command is a small utility for analyzing bitcode files.
+The tool reads a bitcode file (such as generated with the **llvm-as** tool) and
+produces a statistical report on the contents of the bitcode file.  The tool
+can also dump a low level but human readable version of the bitcode file.
+This tool is probably not of much interest or utility except for those working
+directly with the bitcode file format. Most LLVM users can just ignore
+this tool.
+
+If *filename* is omitted or is ``-``, then **llvm-bcanalyzer** reads its input
+from standard input. This is useful for combining the tool into a pipeline.
+Output is written to the standard output.
+
+
+OPTIONS
+-------
+
+
+
+**-nodetails**
+
+ Causes **llvm-bcanalyzer** to abbreviate its output by writing out only a module
+ level summary. The details for individual functions are not displayed.
+
+
+
+**-dump**
+
+ Causes **llvm-bcanalyzer** to dump the bitcode in a human readable format. This
+ format is significantly different from LLVM assembly and provides details about
+ the encoding of the bitcode file.
+
+
+
+**-verify**
+
+ Causes **llvm-bcanalyzer** to verify the module produced by reading the
+ bitcode. This ensures that the statistics generated are based on a consistent
+ module.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-bcanalyzer** succeeds, it will exit with 0.  Otherwise, if an error
+occurs, it will exit with a non-zero value, usually 1.
+
+
+SUMMARY OUTPUT DEFINITIONS
+--------------------------
+
+
+The following items are always printed by llvm-bcanalyzer. They comprize the
+summary output.
+
+
+**Bitcode Analysis Of Module**
+
+ This just provides the name of the module for which bitcode analysis is being
+ generated.
+
+
+
+**Bitcode Version Number**
+
+ The bitcode version (not LLVM version) of the file read by the analyzer.
+
+
+
+**File Size**
+
+ The size, in bytes, of the entire bitcode file.
+
+
+
+**Module Bytes**
+
+ The size, in bytes, of the module block. Percentage is relative to File Size.
+
+
+
+**Function Bytes**
+
+ The size, in bytes, of all the function blocks. Percentage is relative to File
+ Size.
+
+
+
+**Global Types Bytes**
+
+ The size, in bytes, of the Global Types Pool. Percentage is relative to File
+ Size. This is the size of the definitions of all types in the bitcode file.
+
+
+
+**Constant Pool Bytes**
+
+ The size, in bytes, of the Constant Pool Blocks Percentage is relative to File
+ Size.
+
+
+
+**Module Globals Bytes**
+
+ Ths size, in bytes, of the Global Variable Definitions and their initializers.
+ Percentage is relative to File Size.
+
+
+
+**Instruction List Bytes**
+
+ The size, in bytes, of all the instruction lists in all the functions.
+ Percentage is relative to File Size. Note that this value is also included in
+ the Function Bytes.
+
+
+
+**Compaction Table Bytes**
+
+ The size, in bytes, of all the compaction tables in all the functions.
+ Percentage is relative to File Size. Note that this value is also included in
+ the Function Bytes.
+
+
+
+**Symbol Table Bytes**
+
+ The size, in bytes, of all the symbol tables in all the functions. Percentage is
+ relative to File Size. Note that this value is also included in the Function
+ Bytes.
+
+
+
+**Dependent Libraries Bytes**
+
+ The size, in bytes, of the list of dependent libraries in the module. Percentage
+ is relative to File Size. Note that this value is also included in the Module
+ Global Bytes.
+
+
+
+**Number Of Bitcode Blocks**
+
+ The total number of blocks of any kind in the bitcode file.
+
+
+
+**Number Of Functions**
+
+ The total number of function definitions in the bitcode file.
+
+
+
+**Number Of Types**
+
+ The total number of types defined in the Global Types Pool.
+
+
+
+**Number Of Constants**
+
+ The total number of constants (of any type) defined in the Constant Pool.
+
+
+
+**Number Of Basic Blocks**
+
+ The total number of basic blocks defined in all functions in the bitcode file.
+
+
+
+**Number Of Instructions**
+
+ The total number of instructions defined in all functions in the bitcode file.
+
+
+
+**Number Of Long Instructions**
+
+ The total number of long instructions defined in all functions in the bitcode
+ file. Long instructions are those taking greater than 4 bytes. Typically long
+ instructions are GetElementPtr with several indices, PHI nodes, and calls to
+ functions with large numbers of arguments.
+
+
+
+**Number Of Operands**
+
+ The total number of operands used in all instructions in the bitcode file.
+
+
+
+**Number Of Compaction Tables**
+
+ The total number of compaction tables in all functions in the bitcode file.
+
+
+
+**Number Of Symbol Tables**
+
+ The total number of symbol tables in all functions in the bitcode file.
+
+
+
+**Number Of Dependent Libs**
+
+ The total number of dependent libraries found in the bitcode file.
+
+
+
+**Total Instruction Size**
+
+ The total size of the instructions in all functions in the bitcode file.
+
+
+
+**Average Instruction Size**
+
+ The average number of bytes per instruction across all functions in the bitcode
+ file. This value is computed by dividing Total Instruction Size by Number Of
+ Instructions.
+
+
+
+**Maximum Type Slot Number**
+
+ The maximum value used for a type's slot number. Larger slot number values take
+ more bytes to encode.
+
+
+
+**Maximum Value Slot Number**
+
+ The maximum value used for a value's slot number. Larger slot number values take
+ more bytes to encode.
+
+
+
+**Bytes Per Value**
+
+ The average size of a Value definition (of any type). This is computed by
+ dividing File Size by the total number of values of any type.
+
+
+
+**Bytes Per Global**
+
+ The average size of a global definition (constants and global variables).
+
+
+
+**Bytes Per Function**
+
+ The average number of bytes per function definition. This is computed by
+ dividing Function Bytes by Number Of Functions.
+
+
+
+**# of VBR 32-bit Integers**
+
+ The total number of 32-bit integers encoded using the Variable Bit Rate
+ encoding scheme.
+
+
+
+**# of VBR 64-bit Integers**
+
+ The total number of 64-bit integers encoded using the Variable Bit Rate encoding
+ scheme.
+
+
+
+**# of VBR Compressed Bytes**
+
+ The total number of bytes consumed by the 32-bit and 64-bit integers that use
+ the Variable Bit Rate encoding scheme.
+
+
+
+**# of VBR Expanded Bytes**
+
+ The total number of bytes that would have been consumed by the 32-bit and 64-bit
+ integers had they not been compressed with the Variable Bit Rage encoding
+ scheme.
+
+
+
+**Bytes Saved With VBR**
+
+ The total number of bytes saved by using the Variable Bit Rate encoding scheme.
+ The percentage is relative to # of VBR Expanded Bytes.
+
+
+
+
+DETAILED OUTPUT DEFINITIONS
+---------------------------
+
+
+The following definitions occur only if the -nodetails option was not given.
+The detailed output provides additional information on a per-function basis.
+
+
+**Type**
+
+ The type signature of the function.
+
+
+
+**Byte Size**
+
+ The total number of bytes in the function's block.
+
+
+
+**Basic Blocks**
+
+ The number of basic blocks defined by the function.
+
+
+
+**Instructions**
+
+ The number of instructions defined by the function.
+
+
+
+**Long Instructions**
+
+ The number of instructions using the long instruction format in the function.
+
+
+
+**Operands**
+
+ The number of operands used by all instructions in the function.
+
+
+
+**Instruction Size**
+
+ The number of bytes consumed by instructions in the function.
+
+
+
+**Average Instruction Size**
+
+ The average number of bytes consumed by the instructions in the function. This
+ value is computed by dividing Instruction Size by Instructions.
+
+
+
+**Bytes Per Instruction**
+
+ The average number of bytes used by the function per instruction. This value is
+ computed by dividing Byte Size by Instructions. Note that this is not the same
+ as Average Instruction Size. It computes a number relative to the total function
+ size not just the size of the instruction list.
+
+
+
+**Number of VBR 32-bit Integers**
+
+ The total number of 32-bit integers found in this function (for any use).
+
+
+
+**Number of VBR 64-bit Integers**
+
+ The total number of 64-bit integers found in this function (for any use).
+
+
+
+**Number of VBR Compressed Bytes**
+
+ The total number of bytes in this function consumed by the 32-bit and 64-bit
+ integers that use the Variable Bit Rate encoding scheme.
+
+
+
+**Number of VBR Expanded Bytes**
+
+ The total number of bytes in this function that would have been consumed by
+ the 32-bit and 64-bit integers had they not been compressed with the Variable
+ Bit Rate encoding scheme.
+
+
+
+**Bytes Saved With VBR**
+
+ The total number of bytes saved in this function by using the Variable Bit
+ Rate encoding scheme. The percentage is relative to # of VBR Expanded Bytes.
+
+
+
+
+SEE ALSO
+--------
+
+
+llvm-dis|llvm-dis, `http://llvm.org/docs/BitCodeFormat.html <http://llvm.org/docs/BitCodeFormat.html>`_