llvm-6502/lib/Support
Chandler Carruth 1739b6cc20 Use two variables here rather than reusing (and abusing) one. This is
much more clear to me. I meant to make this change before committing the
original patch, but forgot to merge it in. Sorry.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198069 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-27 04:44:35 +00:00
..
Unix Make sys::ThreadLocal<> zero-initialized on non-thread builds (PR18205) 2013-12-19 20:32:44 +00:00
Windows Correct word hyphenations 2013-12-05 05:44:44 +00:00
Allocator.cpp
APFloat.cpp Correct word hyphenations 2013-12-05 05:44:44 +00:00
APInt.cpp Remove APInt::extractBit since it is already implemented via operator[]. Change tests for extractBit to test operator[]. 2013-12-13 22:00:19 +00:00
APSInt.cpp
Atomic.cpp
BlockFrequency.cpp [block-freq] Add a right shift to BlockFrequency that saturates at 1. 2013-12-14 02:24:22 +00:00
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt Introduce a simple line-by-line iterator type into the Support library. 2013-12-27 04:28:57 +00:00
CommandLine.cpp Support: Fix handling of args that begin with @ but aren't files 2013-12-06 22:56:19 +00:00
Compression.cpp
ConstantRange.cpp [ConstantRange] improve my previous patch per Nick suggestion 2013-10-31 19:53:53 +00:00
ConvertUTF.c
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
DataStream.cpp
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp Dwarf: Fix a copy-paste bug. 2013-12-22 10:23:23 +00:00
DynamicLibrary.cpp Make sure LLVMLoadLibraryPermanently gets an extern "C" symbol. 2013-11-13 15:35:13 +00:00
Errno.cpp
ErrorHandling.cpp Revert r194865 and r194874. 2013-11-18 09:31:53 +00:00
FileOutputBuffer.cpp
FileUtilities.cpp
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp
Hashing.cpp
Host.cpp Add support for krait cpu in llvm::sys::getHostCPUName() 2013-12-20 09:24:13 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
IsInf.cpp
IsNAN.cpp
LineIterator.cpp Use two variables here rather than reusing (and abusing) one. This is 2013-12-27 04:44:35 +00:00
LLVMBuild.txt
Locale.cpp
LockFileManager.cpp
Makefile
ManagedStatic.cpp
MD5.cpp
Memory.cpp
MemoryBuffer.cpp MemoryBuffer: Increase the alignment of small file buffers to 16 2013-12-16 18:18:12 +00:00
MemoryObject.cpp
Mutex.cpp
Path.cpp Path: Recognize COFF import library file magic. 2013-11-15 21:22:02 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp Make the pretty stack trace be an opt-in, rather than opt-out, facility. Enable pretty 2013-11-04 02:22:25 +00:00
Process.cpp
Program.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 missing escape characters to the new Regex::escape() function 2013-12-12 02:51:58 +00:00
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp Lift self-copy protection up to the header file and add self-move 2013-11-26 00:54:44 +00:00
SmallVector.cpp
SourceMgr.cpp
Statistic.cpp
StreamableMemoryObject.cpp
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp Add {start,end}with_lower methods to StringRef. 2013-10-30 18:32:26 +00:00
StringRefMemoryObject.cpp
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp Fix pr18235. 2013-12-13 16:05:32 +00:00
Threading.cpp
ThreadLocal.cpp Make sys::ThreadLocal<> zero-initialized on non-thread builds (PR18205) 2013-12-19 20:32:44 +00:00
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp Recognize EABIHF as environment and use it for RTAPI + VFP. 2013-12-16 18:51:28 +00:00
Twine.cpp
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp [weak vtables] Remove a bunch of weak vtables 2013-11-19 00:57:56 +00:00
YAMLTraits.cpp revert r194655 2013-11-21 00:20:10 +00:00

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