llvm/lib/Support
Bill Wendling a6091be84c Silence 'may be used uninitialized in this function' warnings. Static analysis
may determine that they cannot be used uninitialized. But that might be a bit
too much for the compiler to determine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120916 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-04 20:20:34 +00:00
..
Unix Support/PathV2: Remove redundant calls to make_error_code. 2010-12-04 18:45:32 +00:00
Windows Support/PathV2: Remove redundant calls to make_error_code. 2010-12-04 18:45:32 +00:00
Alarm.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Allocator.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
APFloat.cpp PR5207: change APInt::doubleToBits() and APInt::floatToBits() to be 2010-11-28 21:04:48 +00:00
APInt.cpp APInt: microoptimize a few methods. 2010-12-04 18:05:36 +00:00
APSInt.cpp
Atomic.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
circular_raw_ostream.cpp clean this up, fix std::min ambiguity on some platforms. 2010-04-09 20:43:54 +00:00
CMakeLists.txt Support: Add PathV2 implementation. 2010-11-29 22:28:51 +00:00
CommandLine.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
ConstantRange.cpp Make ConstantRange::makeICmpRegion handle all the edge cases properly. This 2010-09-28 18:18:36 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
DAGDeltaAlgorithm.cpp Use const_iterator where appropriate. 2010-06-08 17:21:57 +00:00
Debug.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
DeltaAlgorithm.cpp DeltaAlgorithm: Tweak split to split by first/second half instead of even/odd, since adjacent changes are more likely to be related. 2010-06-08 16:21:26 +00:00
Disassembler.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Dwarf.cpp Add the entire range of DW_OP_lit[0..31], DW_OP_reg[0..31], and 2010-06-17 01:23:24 +00:00
DynamicLibrary.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Errno.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
ErrorHandling.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
FileUtilities.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
FoldingSet.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
FormattedStream.cpp Make tool_output_file's raw_ostream instance a member variable instead 2010-09-01 14:20:41 +00:00
GraphWriter.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Host.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
IncludeFile.cpp Now to chant the magical incantation that will exorcise the System library 2010-11-29 19:44:50 +00:00
IntervalMap.cpp Add IntervalMap::iterator::set{Start,Stop,Value} methods that allow limited 2010-12-03 19:02:00 +00:00
IsInf.cpp
IsNAN.cpp
Makefile Merge System into Support. 2010-11-29 18:16:10 +00:00
ManagedStatic.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Memory.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
MemoryBuffer.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
MemoryObject.cpp
Mutex.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Path.cpp Delete Path::appendSuffix's return value; it wasn't used anywhere, which 2010-12-01 02:46:41 +00:00
PathV2.cpp Silence 'may be used uninitialized in this function' warnings. Static analysis 2010-12-04 20:20:34 +00:00
PluginLoader.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
PrettyStackTrace.cpp Apparently OS X 10.4 doesn't have __crashreporter_info__. 2010-12-03 07:45:22 +00:00
Process.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Program.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
README.txt.system Merge System into Support. 2010-11-29 18:16:10 +00:00
regcclass.h
regcname.h
regcomp.c
regengine.inc Various MSVC warning fixes about truncated 64 bit shifts and const pointers passed to free. 2010-04-08 15:25:57 +00:00
regerror.c
regex2.h
regex_impl.h
Regex.cpp Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
regexec.c Push const through the regex engine. Fixes some of the warnings in PR6616. 2010-04-05 17:50:20 +00:00
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
SearchForAddressOfSpecialSymbol.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Signals.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
SmallPtrSet.cpp Rather than giving SmallPtrSetImpl a member field SmallArray which is magically 2010-06-30 15:02:37 +00:00
SmallVector.cpp After some discussion with djg, teach SmallVector to grow from a zero 2010-09-02 21:55:03 +00:00
SourceMgr.cpp now that AsmPrinter::EmitInlineAsm is factored right, we can eliminate the 2010-11-17 08:13:01 +00:00
Statistic.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
StringExtras.cpp Fix refacto reported by Nicolas Geoffray. 2010-01-18 12:40:05 +00:00
StringMap.cpp
StringPool.cpp Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
StringRef.cpp Support/ADT/StringRef: Add find_last_of. 2010-11-30 23:27:35 +00:00
system_error.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
SystemUtils.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
TargetRegistry.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Threading.cpp Now to chant the magical incantation that will exorcise the System library 2010-11-29 19:44:50 +00:00
ThreadLocal.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Timer.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
TimeValue.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
ToolOutputFile.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Triple.cpp Remove PIC16 remnants. 2010-11-27 18:20:30 +00:00
Twine.cpp Support/ADT/Twine: Make toNullTerminatedStringRef not rely on UB :(. 2010-12-03 05:42:25 +00:00
Valgrind.cpp Merge System into Support. 2010-11-29 18:16:10 +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