llvm-6502/docs
David Majnemer 39a09d2b7c IR: Change inalloca's grammar a bit
The grammar for LLVM IR is not well specified in any document but seems
to obey the following rules:

 - Attributes which have parenthesized arguments are never preceded by
   commas.  This form of attribute is the only one which ever has
   optional arguments.  However, not all of these attributes support
   optional arguments: 'thread_local' supports an optional argument but
   'addrspace' does not.  Interestingly, 'addrspace' is documented as
   being a "qualifier".  What constitutes a qualifier?  I cannot find a
   definition.

 - Some attributes use a space between the keyword and the value.
   Examples of this form are 'align' and 'section'.  These are always
   preceded by a comma.

 - Otherwise, the attribute has no argument.  These attributes do not
   have a preceding comma.

Sometimes an attribute goes before the instruction, between the
instruction and it's type, or after it's type.  'atomicrmw' has
'volatile' between the instruction and the type while 'call' has 'tail'
preceding the instruction.

With all this in mind, it seems most consistent for 'inalloca' on an
'inalloca' instruction to occur before between the instruction and the
type.  Unlike the current formulation, there would be no preceding
comma.  The combination 'alloca inalloca' doesn't look particularly
appetizing, perhaps a better spelling of 'inalloca' is down the road.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203376 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-09 06:41:58 +00:00
..
_static
_templates
_themes/llvm-theme
CommandGuide [docs] Clean up some more llvm-gcc stuff 2014-02-19 00:12:34 +00:00
HistoricalNotes
TableGen [docs] TableGen easter egg: Multiline string literals 2014-02-09 02:43:50 +00:00
tutorial [docs] Clean up some more llvm-gcc stuff 2014-02-19 00:12:34 +00:00
AliasAnalysis.rst
Atomics.rst
BitCodeFormat.rst [ms-cxxabi] Add a new calling convention that swaps 'this' and 'sret' 2014-01-31 17:41:22 +00:00
BranchWeightMetadata.rst
Bugpoint.rst
CMake.rst [docs] Teach CMake docs build how to generate Qt Creator help/documentation files. 2014-03-07 19:19:28 +00:00
CMakeLists.txt [docs] Teach CMake docs build how to generate Qt Creator help/documentation files. 2014-03-07 19:19:28 +00:00
CodeGenerator.rst [ms-cxxabi] Add a new calling convention that swaps 'this' and 'sret' 2014-01-31 17:41:22 +00:00
CodingStandards.rst C++11: Remove const from in auto guidelines 2014-03-07 18:06:15 +00:00
CommandLine.rst
CompilerWriterInfo.rst
conf.py
DebuggingJITedCode.rst
DeveloperPolicy.rst [docs] Clean up some more llvm-gcc stuff 2014-02-19 00:12:34 +00:00
doxygen.cfg.in [docs] Teach CMake docs build how to generate Qt Creator help/documentation files. 2014-03-07 19:19:28 +00:00
doxygen.css
doxygen.footer
doxygen.header
doxygen.intro
Dummy.html
ExceptionHandling.rst Exception handling docs: Fix a typo 2014-02-27 06:54:04 +00:00
ExtendedIntegerResults.txt
ExtendingLLVM.rst
Extensions.rst Fix typo 2014-02-15 06:02:36 +00:00
FAQ.rst remove an old entry whose link is broken anyway 2014-03-02 06:37:03 +00:00
GarbageCollection.rst
gcc-loops.png
GetElementPtr.rst [docs] Clean up some more llvm-gcc stuff 2014-02-19 00:12:34 +00:00
GettingStarted.rst [docs] Fix some Sphinx warnings. 2014-03-02 00:21:42 +00:00
GettingStartedVS.rst
GoldPlugin.rst
HowToAddABuilder.rst
HowToBuildOnARM.rst
HowToCrossCompileLLVM.rst
HowToReleaseLLVM.rst [docs] Fix some Sphinx warnings. 2014-03-02 00:21:42 +00:00
HowToSetUpLLVMStyleRTTI.rst [C++11] Replace LLVM-style type traits with C++11 standard ones. 2014-03-07 14:42:25 +00:00
HowToSubmitABug.rst [docs] Nuke some references to llvm-gcc 2014-02-18 23:56:43 +00:00
HowToUseAttributes.rst
HowToUseInstrMappings.rst
InAlloca.rst
index.rst [docs] Fix some Sphinx warnings. 2014-03-02 00:21:42 +00:00
LangRef.rst IR: Change inalloca's grammar a bit 2014-03-09 06:41:58 +00:00
Lexicon.rst
LinkTimeOptimization.rst
linpack-pc.png
LLVMBuild.rst
LLVMBuild.txt
make.bat
Makefile
Makefile.sphinx
MakefileGuide.rst
MarkedUpDisassembly.rst
MCJIT-creation.png
MCJIT-dyld-load.png
MCJIT-engine-builder.png
MCJIT-load-object.png
MCJIT-load.png
MCJIT-resolve-relocations.png
MCJITDesignAndImplementation.rst
NVPTXUsage.rst
Packaging.rst
Passes.rst
Phabricator.rst Add a note about using "Differential Revision:" in commit messages 2014-02-11 16:58:03 +00:00
ProgrammersManual.rst "Mac OS/X" -> "Mac OS X" spelling fixes for llvm. 2014-03-07 18:08:54 +00:00
Projects.rst
re_format.7
README.txt
ReleaseNotes.rst Now that it is possible, use the mangler in IRObjectFile. 2014-02-28 02:17:23 +00:00
ReleaseProcess.rst
SegmentedStacks.rst
SourceLevelDebugging.rst Add DWARF discriminator support to DILexicalBlocks. 2014-03-03 18:53:17 +00:00
SphinxQuickstartTemplate.rst
StackMaps.rst [Stackmaps] Record the stack size of each function that contains a stackmap/patchpoint intrinsic. 2014-01-30 18:58:27 +00:00
SystemLibrary.rst
TableGenFundamentals.rst [docs] [tblgen] clarify that code fragments are just string literals 2014-02-09 02:54:26 +00:00
TestingGuide.rst Cleanup docs about lit substitutions 2014-02-15 08:35:56 +00:00
TestSuiteMakefileGuide.rst
Vectorizers.rst
WritingAnLLVMBackend.rst
WritingAnLLVMPass.rst
yaml2obj.rst
YamlIO.rst

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 docs/
    make -f Makefile.sphinx
    $BROWSER _build/html/index.html

The mapping between reStructuredText files and generated documentation is
`docs/Foo.rst` <-> `_build/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/man/`.

    cd docs/
    make -f Makefile.sphinx man
    man -l _build/man/FileCheck.1

The correspondence between .rst files and man pages is
`docs/CommandGuide/Foo.rst` <-> `_build/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`.