llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-09-30 19:55:11 +00:00

History

Michael J. Spencer 2d484eb88d Support/PathV2: Add missing has_relative_path impl. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122243 91177308-0d34-0410-b5e6-96231b3b80d8		2010-12-20 13:30:28 +00:00
..
Unix	Add missing standard headers. Patch by Joerg Sonnenberger!	2010-12-19 20:43:38 +00:00
Windows	Missed some StringRefRefs.	2010-12-17 18:59:09 +00:00
Allocator.cpp
APFloat.cpp	PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and	2010-12-07 08:25:19 +00:00
APInt.cpp	PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and	2010-12-07 08:25:19 +00:00
APSInt.cpp
Atomic.cpp
circular_raw_ostream.cpp
CMakeLists.txt	Support: Remove Alarm. It is unused (via local grep and google code search).	2010-12-07 18:41:59 +00:00
CommandLine.cpp	Support/PathV1: Deprecate getLast.	2010-12-18 00:19:10 +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
DAGDeltaAlgorithm.cpp
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp
DynamicLibrary.cpp	Don't leak the mutex when loading dynamic libraries.	2010-12-07 07:56:20 +00:00
Errno.cpp
ErrorHandling.cpp
FileUtilities.cpp	MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm.	2010-12-16 03:29:14 +00:00
FoldingSet.cpp
FormattedStream.cpp	Add missing standard headers. Patch by Joerg Sonnenberger!	2010-12-19 20:43:38 +00:00
GraphWriter.cpp
Host.cpp
IncludeFile.cpp
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
ManagedStatic.cpp
Memory.cpp
MemoryBuffer.cpp	Add missing standard headers. Patch by Joerg Sonnenberger!	2010-12-19 20:43:38 +00:00
MemoryObject.cpp
Mutex.cpp
Path.cpp
PathV2.cpp	Support/PathV2: Add missing has_relative_path impl.	2010-12-20 13:30:28 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
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
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
SearchForAddressOfSpecialSymbol.cpp	build: Go back to dropping __eprintf reference when building with Clang, see	2010-12-07 16:29:44 +00:00
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp	MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm.	2010-12-16 03:29:14 +00:00
Statistic.cpp
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp	PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and	2010-12-07 08:25:19 +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
TargetRegistry.cpp
Threading.cpp
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp	Trailing whitespace and 80 column fixups.	2010-12-17 02:10:59 +00:00
Twine.cpp
Valgrind.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