llvm-6502/lib/Support
2011-09-12 17:18:20 +00:00
..
Unix Clarify a comment. 2011-08-10 05:02:22 +00:00
Windows lib/Support/Windows/Windows.h: Update required IE ver. 0x0600 should be enough for Windows XP. 2011-08-23 03:49:11 +00:00
Allocator.cpp
APFloat.cpp Silence a bunch (but not all) "variable written but not read" warnings 2011-08-12 14:54:45 +00:00
APInt.cpp Add APInt(numBits, ArrayRef<uint64_t> bigVal) constructor to prevent future ambiguity 2011-07-18 21:45:40 +00:00
APSInt.cpp
Atomic.cpp
BlockFrequency.cpp Optimize 96-bit division a little bit. 2011-07-27 16:00:40 +00:00
BranchProbability.cpp BranchProbability::print returns void now. 2011-07-25 22:27:42 +00:00
circular_raw_ostream.cpp
CMakeLists.txt Move TargetRegistry and TargetSelect from Target to Support where they belong. 2011-08-24 18:08:43 +00:00
CommandLine.cpp Move the registered target printing in version strings completely out of 2011-07-22 07:50:48 +00:00
ConstantRange.cpp Trim includes. 2011-07-27 15:20:06 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp lib/Support/CrashRecoveryContext.cpp: Add Win32 support to CrashRecoveryContext. Thanks to Aaron Ballman! 2011-08-20 06:35:36 +00:00
DAGDeltaAlgorithm.cpp
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp Add DW_ATE_UTF, which clang started using in my previous commit! 2011-09-12 17:18:20 +00:00
DynamicLibrary.cpp Make DynamicLibrary thread-safe w/r/t call to dlerror() after dlopen(). PR10718 2011-08-22 19:01:52 +00:00
Errno.cpp
ErrorHandling.cpp
FileUtilities.cpp
FoldingSet.cpp Simplify & microoptimize code. No intended functionality change. 2011-07-18 00:00:20 +00:00
FormattedStream.cpp
GraphWriter.cpp
Host.cpp Intel family 6 model 44 is Gulftown/Westmere-EP and doesn't have AVX. 2011-08-25 18:05:56 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
IsInf.cpp
IsNAN.cpp
Makefile
ManagedStatic.cpp
Memory.cpp
MemoryBuffer.cpp
MemoryObject.cpp Report failure if there are less bytes than requested in a MemoryObject. 2011-08-27 07:45:46 +00:00
Mutex.cpp
Path.cpp
PathV2.cpp
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp
Program.cpp
raw_os_ostream.cpp
raw_ostream.cpp Fix integer overflow bug in raw_ostream::write. This showed up as a 2011-08-28 03:30:02 +00:00
README.txt.system
regcclass.h
regcname.h
regcomp.c
regengine.inc
regerror.c
regex2.h
regex_impl.h
Regex.cpp
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp
Statistic.cpp
StringExtras.cpp move tier out of an anonymous namespace, it doesn't make sense 2011-07-21 06:21:31 +00:00
StringMap.cpp
StringPool.cpp
StringRef.cpp
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp Move TargetRegistry and TargetSelect from Target to Support where they belong. 2011-08-24 18:08:43 +00:00
Threading.cpp
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp Add AMDIL as valid target triple to LLVM. 2011-08-29 15:44:55 +00:00
Twine.cpp Add Twine support for characters, and switch twine to use a union internally 2011-07-24 20:44:30 +00:00
Valgrind.cpp

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