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History

Craig Topper c58a047c25 [APInt] Use Lo_32/Hi_32/Make_64 in a few more places in the divide code. NFCI llvm-svn: 302983		2017-05-13 07:14:17 +00:00
..
Unix	Remove spurious cast of nullptr. NFC.	2017-05-11 08:53:00 +00:00
Windows	Refactor DynamicLibrary so searching for a symbol will have a defined order and	2017-04-27 16:55:24 +00:00
Allocator.cpp
APFloat.cpp	[AsmWriter/APFloat] FP constant printing: Avoid usage of locale dependent snprinf	2017-04-21 02:52:17 +00:00
APInt.cpp	[APInt] Use Lo_32/Hi_32/Make_64 in a few more places in the divide code. NFCI	2017-05-13 07:14:17 +00:00
APSInt.cpp
ARMAttributeParser.cpp
ARMBuildAttrs.cpp
ARMWinEH.cpp
Atomic.cpp
BinaryStreamError.cpp
BinaryStreamReader.cpp	Resubmit r301986 and r301987 "Add codeview::StringTable"	2017-05-03 15:58:37 +00:00
BinaryStreamWriter.cpp	Resubmit r301986 and r301987 "Add codeview::StringTable"	2017-05-03 15:58:37 +00:00
BlockFrequency.cpp
BranchProbability.cpp
CachePruning.cpp
Chrono.cpp
circular_raw_ostream.cpp
CMakeLists.txt	[Support] Move Parallel algorithms from LLD to LLVM.	2017-05-11 00:03:52 +00:00
COM.cpp
CommandLine.cpp	Allow suppressing host and target info in VersionPrinter	2017-04-19 00:03:36 +00:00
Compression.cpp
ConvertUTF.cpp
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp
DAGDeltaAlgorithm.cpp
DataExtractor.cpp	Make DWARFDebugLine use StringRef for directory/file tables. NFC	2017-05-02 17:37:32 +00:00
Debug.cpp
DebugCounter.cpp
DeltaAlgorithm.cpp
Dwarf.cpp	[DWARF] Versioning for DWARF constants; verify FORMs	2017-04-20 19:16:51 +00:00
DynamicLibrary.cpp	Refactor DynamicLibrary so searching for a symbol will have a defined order and	2017-04-27 16:55:24 +00:00
Errno.cpp
Error.cpp
ErrorHandling.cpp
FileOutputBuffer.cpp
FileUtilities.cpp
FoldingSet.cpp
FormattedStream.cpp
FormatVariadic.cpp
GlobPattern.cpp
GraphWriter.cpp
Hashing.cpp
Host.cpp	[X86][LWP] Add llvm support for LWP instructions (reapplied).	2017-05-03 15:51:39 +00:00
IntEqClasses.cpp
IntervalMap.cpp
JamCRC.cpp
LEB128.cpp
LineIterator.cpp
LLVMBuild.txt
Locale.cpp
LockFileManager.cpp
LowLevelType.cpp	[GlobalISel] Support vector-of-pointers in LLT	2017-04-19 07:23:57 +00:00
ManagedStatic.cpp
MathExtras.cpp
MD5.cpp
Memory.cpp
MemoryBuffer.cpp
Mutex.cpp
NativeFormatting.cpp
Options.cpp
Parallel.cpp	Fix -DLLVM_ENABLE_THREADS=OFF build after r302748	2017-05-11 15:32:47 +00:00
Path.cpp
PluginLoader.cpp
PrettyStackTrace.cpp	Include <cstdio> in PrettyStackTrace.cpp, since it uses vsnprintf(3).	2017-04-29 23:45:30 +00:00
Process.cpp
Program.cpp
RandomNumberGenerator.cpp
raw_os_ostream.cpp
raw_ostream.cpp
README.txt.system
regcclass.h
regcname.h
regcomp.c
regengine.inc
regerror.c
regex2.h
regex_impl.h
Regex.cpp	Add const to a const method. NFC	2017-04-18 01:04:05 +00:00
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp
ScaledNumber.cpp
ScopedPrinter.cpp	[llvm-pdbdump] Allow printing only a portion of a stream.	2017-04-28 00:43:38 +00:00
SHA1.cpp
Signals.cpp	Remove name space pollution from Signals.cpp	2017-03-31 14:58:52 +00:00
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp	Remove unnecessary conditions as suggested by clang-tidy. NFC	2017-05-01 16:18:42 +00:00
SpecialCaseList.cpp
Statistic.cpp
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp
StringSaver.cpp
SystemUtils.cpp
TargetParser.cpp	[AArch64] Fix variable name ambiguity in r302078.	2017-05-03 20:51:34 +00:00
TargetRegistry.cpp
TarWriter.cpp
Threading.cpp
ThreadLocal.cpp
ThreadPool.cpp
Timer.cpp
ToolOutputFile.cpp
TrigramIndex.cpp
Triple.cpp	[Triple] Add a "macos" OS type that acts as a synonym for "macosx"	2017-05-03 10:42:35 +00:00
Twine.cpp
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
xxhash.cpp	Revert r301487: Replace HashString algorithm with xxHash64	2017-04-26 23:15:10 +00:00
YAMLParser.cpp
YAMLTraits.cpp

README.txt.system

Design Of lib/System
====================

The software in this directory is designed to completely shield LLVM from any
and all operating system specific functionality. It is not intended to be a
complete operating system wrapper (such as ACE), but only to provide the
functionality necessary to support LLVM.

The software located here, of necessity, has very specific and stringent design
rules. Violation of these rules means that cracks in the shield could form and
the primary goal of the library is defeated. By consistently using this library,
LLVM becomes more easily ported to new platforms since the only thing requiring
porting is this library.

Complete documentation for the library can be found in the file:
  llvm/docs/SystemLibrary.html
or at this URL:
  http://llvm.org/docs/SystemLibrary.html

While we recommend that you read the more detailed documentation, for the
impatient, here's a high level summary of the library's requirements.

 1. No system header files are to be exposed through the interface.
 2. Std C++ and Std C header files are okay to be exposed through the interface.
 3. No exposed system-specific functions.
 4. No exposed system-specific data.
 5. Data in lib/System classes must use only simple C++ intrinsic types.
 6. Errors are handled by returning "true" and setting an optional std::string
 7. Library must not throw any exceptions, period.
 8. Interface functions must not have throw() specifications.
 9. No duplicate function impementations are permitted within an operating
    system class.

To accomplish these requirements, the library has numerous design criteria that
must be satisfied. Here's a high level summary of the library's design criteria:

 1. No unused functionality (only what LLVM needs)
 2. High-Level Interfaces
 3. Use Opaque Classes
 4. Common Implementations
 5. Multiple Implementations
 6. Minimize Memory Allocation
 7. No Virtual Methods