 Abstract Data Structures | This module contains abstract datatypes like lists and hashmaps |
  Arrays | |
| Generic Hashset | Generic Hashset |
| Linked Lists | Doubly linked lists |
| Memory Allocation | |
| Pointer Map | Pointer->Pointer hashmap |
| Pointer Set | (Hash)sets containing pointers |
| Priority Queue | A priority queue |
 Union-Find | Union-Find data structure |
| Algorithms | This module contains generic algorithms like bipartite matching or solvers for linear equation systems |
| Bipartite Matching | Solved bipartite matching problem |
| Gauss Jordan Elimination | Solves a system of linear equations |
| Hash Functions | |
| Hungarian Algorithm | Solves bipartite matching problems (minimize/maximize cost function) |
| Analyses | |
| Basic Block Execution Frequency | Execution frequencies specify how often a basic block is expected to get executed during execution of a function |
| Callgraph | This file contains the representation of the callgraph |
| Control Dependence | |
| Dominance Information | The dominator information is stored in three fields of block nodes: |
| Dynamic Reverse Edges | |
| Loops | |
| Memory Disambiguator | A memory disambiguator checks whether 2 given SSA values representing addresses alias |
| Node Heights | The height is a measure for the longest data dependency path from a node to the end of a basic block |
| Reverse Edges | Out-Edges are the reverse of the edges in a firm graph (also called def-use edges) |
| Value Information | Information about SSA-values (ranges, known bits, ...) |
| Code Generation | Code Generation (backend) produces machine-code |
| Just in Time Compilation | Provides interface to generate code and resolve symbols in memory buffers |
| Correctness Tests | |
| Entities | An entity is the Firm representation of an object known to the program |
| Entity Initializers | |
| Identifiers | |
| Input and Output | |
| Library Initialization | The functions in this section deal with initialization and deinitalization of the libFirm library |
| Lowering | Lowering is the process of transforming a highlevel representation (a representation closer to the sourcecode) into a lower-level representation (something closer to the target machine) |
| Printing and Visualisation | This module contains functions for printing and visualizing libfirm data structures like programs, graphs and nodes for humans |
| String Formatting | These functions allow printing of formated strings with support for printing firm objects in a human readable form |
 Visualisation | Dumps information so it can be visualised |
 Convenience Interface | |
| Low Level Interface | This interface exists to enable some custom vcg formatting/slicing used to produce example images for the homepage |
| Procedure Graph | This struct contains all information about a procedure |
| Construction Support | |
 Nodes | Ir_node - a datatype representing a Firm node |
| ASM node | Executes assembler fragments of the target machine |
| Add node | Returns the sum of its operands |
| Address node | Symbolic constant that represents the address of an entity (variable or method) |
| Align node | A symbolic constant that represents the alignment of a type |
| Alloc node | Allocates a block of memory on the stack |
| Anchor node | Utility node used to "hold" nodes in a graph that might possibly not be reachable by other means or which should be reachable immediately without searching through the graph |
| And node | Returns the result of a bitwise and operation of its operands |
| Bad node | Bad nodes indicate invalid input, which is values which should never be computed |
| Bitcast node | Converts a value between modes with different arithmetics but same number of bits by reinterpreting the bits in the new mode |
| Block node | A basic block |
| Builtin node | Performs a backend-specific builtin |
| Call node | Calls other code |
| Cmp node | Compares its two operands and checks whether a specified relation (like less or equal) is fulfilled |
| Cond node | Conditionally change control flow |
| Confirm node | Specifies constraints for a value |
| Const node | Returns a constant value |
| Conv node | Converts values between modes |
| CopyB node | Copies a block of memory with statically known size/type |
| Deleted node | Internal node which is temporary set to nodes which are already removed from the graph |
| Div node | Returns the quotient of its 2 operands |
| Dummy node | A placeholder value |
| End node | Last node of a graph |
| Eor node | Returns the result of a bitwise exclusive or operation of its operands |
| Free node | Frees a block of memory previously allocated by an Alloc node |
| IJmp node | Jumps to the code in its argument |
| Id node | Returns its operand unchanged |
| Jmp node | Jumps to the block connected through the out-value |
| Load node | Loads a value from memory (heap or stack) |
| Member node | Computes the address of a compound type member given the base address of an instance of the compound type |
| Minus node | Returns the additive inverse of its operand |
| Mod node | Returns the remainder of its operands from an implied division |
| Mul node | Returns the product of its operands |
| Mulh node | Returns the upper word of the product of its operands (the part which would not fit into the result mode of a normal Mul anymore) |
| Mux node | Returns the false or true operand depending on the value of the sel operand |
| NoMem node | Placeholder node for cases where you don't need any memory input |
| Node Opcodes | This module specifies the opcodes for ir nodes |
| Not node | Returns the bitwise complement of a value |
| Offset node | Symbolic constant that represents the offset of an entity in its owner type |
| Or node | Returns the result of a bitwise or operation of its operands |
| Phi node | Choose a value based on control flow |
| Pin node | Pin the value of the node node in the current block |
| Proj node | Returns an entry of a tuple value |
| Raise node | Raises an exception |
| Return node | Returns from the current function |
| Sel node | Computes the address of an array element from the array base pointer and an index |
| Shl node | Returns its first operands bits shifted left by the amount of the 2nd operand |
| Shr node | Returns its first operands bits shifted right by the amount of the 2nd operand |
| Shrs node | Returns its first operands bits shifted right by the amount of the 2nd operand |
| Size node | A symbolic constant that represents the size of a type |
| Start node | The first node of a graph |
| Store node | Stores a value into memory (heap or stack) |
| Sub node | Returns the difference of its operands |
| Switch node | Change control flow |
| Sync node | The Sync operation unifies several partial memory blocks |
| Tuple node | Builds a Tuple from single values |
| Unknown node | Returns an unknown (at compile- and runtime) value |
| Traversing | Traverse graphs: |
| Program | Ir_prog keeps information about a program: |
| Source References | Firm requires a debugging module fulfilling this interface, else no debugging information is passed to the backend |
| Statistic Events | The statistics system helps to evaluate the effects of compiler passes and transformations |
| Target Machine Values | Tarvals only represent values of mode_sort: |
| Target Setup and Information | |
| Machine Triple | Functions to work with machine triples |
| Target platform information | The functions in this API return information about the operating system or runtime system |
| Transformations and Optimizations | |
| Flags | Flags to customize the behavior of libfirm |
| Graph Transformations | |
| Local Optimizations | |
| Type System | Datastructure to hold type information |
| Array | The array type represents linear arrangement of objects of the same type |
| Class | If the type opcode is set to type_class the type represents class types |
| Code | |
| Compound | These functions are common to classes, structs and unions, collectively known as "compound types" |
| Class | If the type opcode is set to type_class the type represents class types |
| Struct | A struct type represents aggregate types that consist of a list of fields |
| Union | The union type represents union types |
| Frame | |
| Method | A method type represents a method, function or procedure type |
| Pointer | Pointer types: |
| Primitive | Primitive types are types that represent atomic data values that map directly to modes |
| Segment | Segment types represent segments in the object file |
| Struct | A struct type represents aggregate types that consist of a list of fields |
| Traversing | |
| Union | The union type represents union types |
| Unknown | This type is an auxiliary type dedicated to support type analyses |
| Value Modes | This module specifies the modes that type the firm nodes |
1.8.6 
