llvm-mirror/docs
Tyker 43346d7e59 Basis of dropping uses in llvm.assume.
Summary: This patch adds the basic utilities to deal with dropable uses. dropable uses are uses that we rather drop than prevent transformations, for now they are limited to uses in llvm.assume.

Reviewers: jdoerfert, sstefan1

Reviewed By: jdoerfert

Subscribers: uenoku, lebedev.ri, mgorny, hiraditya, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73404
2020-03-12 10:10:22 +01:00
..
_ocamldoc
_static
_templates [www] More HTTPS and outdated link fixes. 2019-11-08 14:41:27 -08:00
_themes/llvm-theme [Docs] Updates sidebar links and sets max-width property for div.body 2019-10-15 21:27:20 +00:00
AMDGPU [AMDGPU][MC][DOC] Updated AMD GPU assembler syntax description. 2020-02-07 16:23:46 +03:00
CommandGuide [llvm-objdump] Rename --disassemble-functions to --disassemble-symbols 2020-03-09 08:25:45 -07:00
DependenceGraphs [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
Frontend Fix you->your typo. 2020-02-10 15:07:06 -08:00
GlobalISel [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
HistoricalNotes
PDB Fix a few spellos in docs. 2019-09-13 14:58:24 +00:00
Proposals [Doc] Proposal for vector predication 2020-02-10 10:35:50 +01:00
TableGen [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
tutorial Fix internal links in Kaleidoscope tutorial 2020-03-09 15:07:44 -06:00
AddingConstrainedIntrinsics.rst [FEnv] Fix AddingConstrainedIntrinsics.rst after llvmorg-10-init-10282-g0c50c0b0552 2019-11-19 23:09:13 -08:00
AdvancedBuilds.rst
AliasAnalysis.rst
AMDGPUInstructionNotation.rst
AMDGPUInstructionSyntax.rst [AMDGPU][MC][DOC] Updated AMD GPU assembler syntax description. 2019-07-08 16:50:11 +00:00
AMDGPUModifierSyntax.rst [AMDGPU][MC][DOC] Updated AMD GPU assembler syntax description. 2019-12-25 17:51:53 +03:00
AMDGPUOperandSyntax.rst [AMDGPU][MC][DOC] Updated AMD GPU assembler syntax description. 2019-12-25 17:51:53 +03:00
AMDGPUUsage.rst [AMDGPU] AMDGPUUsage define call convention ABI 2020-02-19 15:56:19 -05:00
ARM-BE-bitcastfail.png
ARM-BE-bitcastsuccess.png
ARM-BE-ld1.png
ARM-BE-ldr.png
Atomics.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
Benchmarking.rst
BigEndianNEON.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
BitCodeFormat.rst [X86] Add new calling convention that guarantees tail call optimization 2019-10-07 22:28:58 +00:00
BlockFrequencyTerminology.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
BranchWeightMetadata.rst
BugLifeCycle.rst
Bugpoint.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
BugpointRedesign.md [Bugpoint redesign] Fix nonlocal URI link in doc 2019-08-09 21:48:47 +00:00
BuildingADistribution.rst Remove AllTargetsAsmPrinters 2020-01-17 19:04:06 -05:00
CFIVerify.rst
CMake.rst Continue removing llgo. 2020-02-10 10:33:58 -08:00
CMakeLists.txt
CMakePrimer.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
CodeGenerator.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
CodeOfConduct.rst
CodeReview.rst High-Level Code-Review Documentation Update 2020-03-07 04:20:18 +00:00
CodingStandards.rst Add coding standard recommending use of qualifiers in cpp files 2020-02-18 14:08:56 -08:00
CommandLine.rst [CommandLine] Add callbacks to Options 2019-12-06 15:16:45 -08:00
CompileCudaWithLLVM.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
CompilerWriterInfo.rst [PowerPC][docs] Update Embedded PowerPC docs in Compiler Writers Info page 2019-12-30 20:22:37 +00:00
conf.py [Docs] Add a custom sidebar to doc pages 2019-09-20 22:16:39 +00:00
Contributing.rst High-Level Code-Review Documentation Update 2020-03-07 04:20:18 +00:00
Coroutines.rst fix another doc typo to cycle bots 2019-12-20 21:59:51 -05:00
CoverageMappingFormat.rst Reland: [Coverage] Revise format to reduce binary size 2020-02-28 18:12:04 -08:00
DebuggingJITedCode.rst [docs] Fix references to a renamed flag. 2019-11-06 14:42:57 -08:00
DeveloperPolicy.rst High-Level Code-Review Documentation Update 2020-03-07 04:20:18 +00:00
Docker.rst [build] Rename clang-headers to clang-resource-headers 2019-03-04 21:19:53 +00:00
doxygen-mainpage.dox
doxygen.cfg.in [docs] update mathjax path in doxygen 2020-02-07 16:26:35 +00:00
ExceptionHandling.rst Remove extra "\01" prefix in EH docs 2020-01-19 08:20:17 -08:00
ExtendedIntegerResults.txt
ExtendingLLVM.rst Note ImmArg in documentation for adding intrinsics 2019-03-14 13:46:17 +00:00
Extensions.rst [Frontend] Replace CC1 option -mcode-model with -mcmodel= 2020-02-21 23:10:50 -08:00
FAQ.rst [docs] Tiny rewording in the portability FAQ entry 2019-11-20 16:40:30 -08:00
FaultMaps.rst
FuzzingLLVM.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
GarbageCollection.rst [AsmPrinter] De-capitalize all AsmPrinter::Emit* but EmitInstruction 2020-02-13 17:06:24 -08:00
gcc-loops.png
GetElementPtr.rst [DOC] Fix load instructions' syntax, function definition. 2019-06-12 11:24:22 +00:00
GettingInvolved.rst Add the CodeReview Documentation to GettingInvolved TOC 2020-03-07 04:55:46 +00:00
GettingStarted.rst [NFC][Test commit] Remove redundant point in docs 2020-03-07 10:30:42 +03:00
GettingStartedTutorials.rst [Docs] Adds Documentation links to sidebar 2019-10-09 20:26:13 +00:00
GettingStartedVS.rst Retire VS2015 Support 2019-07-09 10:10:48 +00:00
GitBisecting.rst git bisect docs: formatting tweaks 2020-02-10 15:47:59 -05:00
GoldPlugin.rst
GwpAsan.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
HowToAddABuilder.rst wrap an rst file to 80 cols, to cycle bots 2019-12-06 17:28:02 -05:00
HowToBuildOnARM.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
HowToBuildWithPGO.rst [docs] NFC: Fix typos in documents 2020-01-07 16:06:14 +01:00
HowToCrossCompileBuiltinsOnArm.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
HowToCrossCompileLLVM.rst
HowToReleaseLLVM.rst Remove some autoconf references from docs and comments 2019-07-03 09:57:59 +00:00
HowToSetUpLLVMStyleRTTI.rst
HowToSubmitABug.rst
HowToUseAttributes.rst
HowToUseInstrMappings.rst
InAlloca.rst
index.rst Make coding standards document more inclusive 2019-11-21 13:37:17 +01:00
LangRef.rst Basis of dropping uses in llvm.assume. 2020-03-12 10:10:22 +01:00
Lexicon.rst High-Level Code-Review Documentation Update 2020-03-07 04:20:18 +00:00
LibFuzzer.rst [libFuzzer] Minor documentation fixes. 2020-02-03 14:41:06 -08:00
LinkTimeOptimization.rst [LTO][Legacy] Add new API to query Mach-O CPU (sub)type 2020-02-28 12:56:05 -08:00
linpack-pc.png
llvm-objdump.1
LLVMBuild.rst
LLVMBuild.txt
LoopTerminology.rst [LoopTerminology][NFC] Fix typo 2020-03-04 02:12:33 +02:00
make.bat
Makefile.sphinx
MarkdownQuickstartTemplate.md
MarkedUpDisassembly.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
MCJIT-creation.png
MCJIT-dyld-load.png
MCJIT-engine-builder.png
MCJIT-load-object.png
MCJIT-load.png
MCJIT-resolve-relocations.png
MCJITDesignAndImplementation.rst
MeetupGuidelines.rst Add guidelines/recommendations for organizers of LLVM Socials 2019-05-14 07:20:58 +00:00
MemorySSA.rst
MemTagSanitizer.rst Fix MemTagSanitizer docs to point at Armv8.5-A MTE 2020-03-05 17:23:58 +00:00
MergeFunctions.rst
MIRLangRef.rst [globalisel][docs] Rework GMIR documentation and add an early GenericOpcode reference 2019-11-05 15:16:43 -08:00
NVPTXUsage.rst
OptBisect.rst [LegacyPassManager] Delete BasicBlockPass/Manager. 2019-10-30 11:40:16 -07:00
ORCv2.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
Packaging.rst
Passes.rst [docs][LoopTerminology] Add Loop Simplify Form description. 2020-02-26 20:41:06 -06:00
Phabricator.rst phab doc: Replace or remove references to svn 2020-01-09 22:29:20 +01:00
ProgrammersManual.rst Correct the Bjarne Stroustrup's C++ Page link 2020-03-06 16:59:50 -05:00
Projects.rst
re_format.7
README.txt [NFC] Test commit, whitespace change 2019-06-06 22:07:14 +00:00
Reference.rst Fix MemTagSanitizer docs to point at Armv8.5-A MTE 2020-03-05 17:23:58 +00:00
ReleaseNotes.rst [ReleaseNotes] Mention the vector-function-abi-variant attribute. 2020-02-24 17:39:31 +00:00
ReleaseProcess.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
Remarks.rst [Remarks] Extend the RemarkStreamer to support other emitters 2020-02-04 17:16:02 -08:00
ReportingGuide.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
ScudoHardenedAllocator.rst
SegmentedStacks.rst
SourceLevelDebugging.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
speculative_load_hardening_microbenchmarks.png
SpeculativeLoadHardening.md Fix a few spellos in docs. 2019-09-13 14:58:24 +00:00
SphinxQuickstartTemplate.rst Docs: Updates Sphinx Quickstart template for new contributors 2019-11-10 09:27:32 -07:00
StackMaps.rst
StackSafetyAnalysis.rst
Statepoints.rst
SupportLibrary.rst
SystemLibrary.rst
TableGenFundamentals.rst
TestingGuide.rst Change the googlemock link 2020-01-22 10:14:47 +01:00
TestSuiteGuide.md [Docs] Fix a typo 2019-12-18 15:19:01 -08:00
TestSuiteMakefileGuide.rst
TransformMetadata.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
TypeMetadata.rst Reland: Dead Virtual Function Elimination 2019-10-17 09:58:57 +00:00
UserGuides.rst [Docs] Moves Control Flow Document to User Guides 2019-10-13 20:05:22 +00:00
Vectorizers.rst [doc] typo in optimisation remark example 2020-02-06 14:55:18 +00:00
WritingAnLLVMBackend.rst Update spelling of {analyze,insert,remove}Branch in strings and comments 2020-01-21 10:15:38 -06:00
WritingAnLLVMPass.rst Generalize the pass registration mechanism used by Polly to any third-party tool 2020-01-02 16:45:31 +01:00
XRay.rst
XRayExample.rst [XRay][docs] Fix option name 2019-03-12 13:44:42 +00:00
XRayFDRFormat.rst [llvm] NFC: fix trivial typos in documents 2020-01-22 11:32:51 +08:00
yaml2obj.rst
YamlIO.rst remove a trailing space character (test commit) 2020-01-27 15:01:55 -08:00

LLVM Documentation
==================

LLVM's documentation is written in reStructuredText, a lightweight
plaintext markup language (file extension `.rst`). While the
reStructuredText documentation should be quite readable in source form, it
is mostly meant to be processed by the Sphinx documentation generation
system to create HTML pages which are hosted on <http://llvm.org/docs/> and
updated after every commit. Manpage output is also supported, see below.

If you instead would like to generate and view the HTML locally, install
Sphinx <http://sphinx-doc.org/> and then do:

    cd <build-dir>
    cmake -DLLVM_ENABLE_SPHINX=true -DSPHINX_OUTPUT_HTML=true <src-dir>
    make -j3 docs-llvm-html
    $BROWSER <build-dir>/docs//html/index.html

The mapping between reStructuredText files and generated documentation is
`docs/Foo.rst` <-> `<build-dir>/docs//html/Foo.html` <-> `http://llvm.org/docs/Foo.html`.

If you are interested in writing new documentation, you will want to read
`SphinxQuickstartTemplate.rst` which will get you writing documentation
very fast and includes examples of the most important reStructuredText
markup syntax.

Manpage Output
===============

Building the manpages is similar to building the HTML documentation. The
primary difference is to use the `man` makefile target, instead of the
default (which is `html`). Sphinx then produces the man pages in the
directory `<build-dir>/docs/man/`.

    cd <build-dir>
    cmake -DLLVM_ENABLE_SPHINX=true -DSPHINX_OUTPUT_MAN=true <src-dir>
    make -j3 docs-llvm-man
    man -l >build-dir>/docs/man/FileCheck.1

The correspondence between .rst files and man pages is
`docs/CommandGuide/Foo.rst` <-> `<build-dir>/docs//man/Foo.1`.
These .rst files are also included during HTML generation so they are also
viewable online (as noted above) at e.g.
`http://llvm.org/docs/CommandGuide/Foo.html`.

Checking links
==============

The reachability of external links in the documentation can be checked by
running:

    cd docs/
    make -f Makefile.sphinx linkcheck

Doxygen page Output
==============

Install doxygen <http://www.stack.nl/~dimitri/doxygen/download.html> and dot2tex <https://dot2tex.readthedocs.io/en/latest>.

    cd <build-dir>
    cmake -DLLVM_ENABLE_DOXYGEN=On <llvm-top-src-dir>
    make doxygen-llvm # for LLVM docs
    make doxygen-clang # for clang docs

It will generate html in

    <build-dir>/docs/doxygen/html # for LLVM docs
    <build-dir>/tools/clang/docs/doxygen/html # for clang docs