Reference

LLVM and API reference documentation.

API Reference

Doxygen generated documentation

(classes)

:doc:`HowToUseAttributes`

Answers some questions about the new Attributes infrastructure.

Documentation for Go bindings

:doc:`ORCv2`

Describes the design and implementation of the ORC APIs, including some usage examples, and a guide for users transitioning from ORCv1 to ORCv2.

LLVM Reference

Command Line Utilities

:doc:`LLVM Command Guide <CommandGuide/index>`

A reference manual for the LLVM command line utilities ("man" pages for LLVM tools).

:doc:`Bugpoint`

Automatic bug finder and test-case reducer description and usage information.

:doc:`OptBisect`

A command line option for debugging optimization-induced failures.

:doc:`The Microsoft PDB File Format <PDB/index>`

A detailed description of the Microsoft PDB (Program Database) file format.

Garbage Collection

:doc:`GarbageCollection`

The interfaces source-language compilers should use for compiling GC'd programs.

:doc:`Statepoints`

This describes a set of experimental extensions for garbage collection support.

LibFuzzer

:doc:`LibFuzzer`

A library for writing in-process guided fuzzers.

:doc:`FuzzingLLVM`

Information on writing and using Fuzzers to find bugs in LLVM.

LLVM IR

:doc:`LLVM Language Reference Manual <LangRef>`

Defines the LLVM intermediate representation and the assembly form of the different nodes.

:doc:`InAlloca`

Description of the inalloca argument attribute.

:doc:`BitCodeFormat`

This describes the file format and encoding used for LLVM "bc" files.

:doc:`Machine IR (MIR) Format Reference Manual <MIRLangRef>`

A reference manual for the MIR serialization format, which is used to test LLVM's code generation passes.

:doc:`GlobalISel/index`

This describes the prototype instruction selection replacement, GlobalISel.

Testing and Debugging

:doc:`LLVM Testing Infrastructure Guide <TestingGuide>`

A reference manual for using the LLVM testing infrastructure.

:doc:`TestSuiteGuide`

Describes how to compile and run the test-suite benchmarks.

:doc:`GwpAsan`

A sampled heap memory error detection toolkit designed for production use.

XRay

:doc:`XRay`

High-level documentation of how to use XRay in LLVM.

:doc:`XRayExample`

An example of how to debug an application with XRay.

Additional Topics

:doc:`FaultMaps`

LLVM support for folding control flow into faulting machine instructions.

:doc:`Atomics`

Information about LLVM's concurrency model.

:doc:`ExceptionHandling`

This document describes the design and implementation of exception handling in LLVM.

:doc:`Extensions`

LLVM-specific extensions to tools and formats LLVM seeks compatibility with.

:doc:`HowToSetUpLLVMStyleRTTI`

How to make isa<>, dyn_cast<>, etc. available for clients of your class hierarchy.

:doc:`BlockFrequencyTerminology`

Provides information about terminology used in the BlockFrequencyInfo analysis pass.

:doc:`BranchWeightMetadata`

Provides information about Branch Prediction Information.

:doc:`GetElementPtr`

Answers to some very frequent questions about LLVM's most frequently misunderstood instruction.

:doc:`ScudoHardenedAllocator`

A library that implements a security-hardened malloc().

:doc:`MemTagSanitizer`

Security hardening for production code aiming to mitigate memory related vulnerabilities. Based on ARMv9 Memory Tagging Extension.

:doc:`Dependence Graphs <DependenceGraphs/index>`

A description of the design of the various dependence graphs such as the DDG (Data Dependence Graph).

:doc:`SpeculativeLoadHardening`

A description of the Speculative Load Hardening mitigation for Spectre v1.

:doc:`SegmentedStacks`

This document describes segmented stacks and how they are used in LLVM.

:doc:`MarkedUpDisassembly`

This document describes the optional rich disassembly output syntax.

:doc:`StackMaps`

LLVM support for mapping instruction addresses to the location of values and allowing code to be patched.

:doc:`Coroutines`

LLVM support for coroutines.

:doc:`YamlIO`

A reference guide for using LLVM's YAML I/O library.