llvm-6502/lib/Support
Zhongxing Xu 422b62b407 singed int causes signed extension, which contradicts the intention to pick up
integers with high 32 bits being zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132538 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-03 08:29:51 +00:00
..
Unix Have Program::Wait return -2 for crashed and timeouts instead of embedding 2011-05-21 00:56:46 +00:00
Windows Have Program::Wait return -2 for crashed and timeouts instead of embedding 2011-05-21 00:56:46 +00:00
Allocator.cpp Add BumpPtrAllocator::getTotalMemory() to allow clients to query how much memory a BumpPtrAllocator allocated. 2011-04-18 22:44:46 +00:00
APFloat.cpp Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
APInt.cpp fix a bug for hosts without round, PR8893. 2011-05-22 06:03:53 +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 Revert my previous patch. The cmake build had already been fixed. 2011-05-19 00:02:45 +00:00
CommandLine.cpp In option typo correction, consider -foo=VALUE flags as two distinct parts. The 2011-05-02 05:24:47 +00:00
ConstantRange.cpp PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and 2010-12-07 08:25:19 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp Properly initialize all fields in CrashReporterCleanupContext. This caused the buildbot failure earlier. 2011-03-22 04:33:13 +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 Doug convinced me that DW_AT_APPLE_objc_complete_type is more appropriate name. 2011-05-12 21:29:42 +00:00
DynamicLibrary.cpp Don't leak the mutex when loading dynamic libraries. 2010-12-07 07:56:20 +00:00
Errno.cpp lib/Support/Errno.cpp: Check strerror_s() with HAVE_DECL_STRERROR_S in config.h.*. 2011-02-09 04:18:48 +00:00
ErrorHandling.cpp Like the coding standards say, do not use "using namespace std". 2011-04-23 09:06:00 +00:00
FileUtilities.cpp Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
FoldingSet.cpp singed int causes signed extension, which contradicts the intention to pick up 2011-06-03 08:29:51 +00:00
FormattedStream.cpp Add missing standard headers. Patch by Joerg Sonnenberger! 2010-12-19 20:43:38 +00:00
GraphWriter.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Host.cpp Rename the "sandybridge" subtarget to "corei7-avx", for GCC compatibility. 2011-05-20 15:11:26 +00:00
IncludeFile.cpp Now to chant the magical incantation that will exorcise the System library 2010-11-29 19:44:50 +00:00
IntEqClasses.cpp Use IntEqClasses to compute connected components of live intervals. 2010-12-21 00:48:17 +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 random comment cleanups. 2011-05-22 00:50:53 +00:00
MemoryObject.cpp
Mutex.cpp Check the errorcode. 2011-02-18 00:47:07 +00:00
Path.cpp Add support for 64-bit object files to Path. 2011-04-22 03:50:19 +00:00
PathV2.cpp Implement a function from PathV2 whose definition is missing. 2011-02-15 17:51:19 +00:00
PluginLoader.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
PrettyStackTrace.cpp Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
Process.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Program.cpp Have Program::Wait return -2 for crashed and timeouts instead of embedding 2011-05-21 00:56:46 +00:00
raw_os_ostream.cpp Make some methods const. The only interesting change here is that 2009-12-19 01:38:42 +00:00
raw_ostream.cpp raw_ostream: [PR6745] Tweak formatting (double)%e for Windows hosts. 2011-03-18 09:30:10 +00:00
README.txt.system Merge System into Support. 2010-11-29 18:16:10 +00:00
regcclass.h
regcname.h
regcomp.c lib/Support/regcomp.c: Fix cygwin warning. 2011-03-08 12:25:29 +00:00
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 regexes are allowed to match empty things, e.g. {{.*}} in filecheck. 2011-04-09 06:29:24 +00:00
regexec.c lib/Support/regexec.c: Let Regex LLP64-aware. 2010-12-16 01:48:15 +00:00
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
SearchForAddressOfSpecialSymbol.cpp build: Go back to dropping __eprintf reference when building with Clang, see 2010-12-07 16:29:44 +00:00
Signals.cpp Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
SmallPtrSet.cpp Prevent infinite growth of SmallPtrSet instances. 2011-03-30 18:32:48 +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 Add new -d option to tblgen. It writes a make(1)-style dependency file. 2011-06-01 13:10:15 +00:00
Statistic.cpp Support: Add llvm::AreStatisticsEnabled(). 2011-02-26 23:17:12 +00:00
StringExtras.cpp Fix refacto reported by Nicolas Geoffray. 2010-01-18 12:40:05 +00:00
StringMap.cpp Reset StringMap's NumTombstones on clears and rehashes. 2011-03-30 18:32:51 +00:00
StringPool.cpp Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
StringRef.cpp Remove bounded StringRef::compare() since nothing but Clang SA was using it and it is just as easy to use StringRef::substr() preceding StringRef::compare() to achieve the same thing. 2011-04-28 20:20:12 +00:00
system_error.cpp Support/MemoryBuffer: Replace all uses of std::string *ErrMsg with error_code &ec. And fix clients. 2010-12-09 17:36:48 +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 ...this is not a good commit day for me. 2011-05-29 19:44:55 +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