llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-06 21:05:51 +00:00

History

Aaron Ballman 502401111b We require MSVC 1800 as our minimum, so these checks can safely go away; NFC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229415 91177308-0d34-0410-b5e6-96231b3b80d8		2015-02-16 18:23:00 +00:00
..
Unix	Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.	2015-02-15 22:54:22 +00:00
Windows	Removing LLVM_EXPLICIT, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.	2015-02-15 22:00:20 +00:00
Allocator.cpp
APFloat.cpp
APInt.cpp	MathExtras: Bring Count(Trailing\|Leading)Ones and CountPopulation in line with countTrailingZeros	2015-02-12 15:35:40 +00:00
APSInt.cpp
ARMBuildAttrs.cpp
ARMWinEH.cpp
Atomic.cpp
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt	Use ADDITIONAL_HEADER_DIRS in all LLVM CMake projects.	2015-02-11 03:28:02 +00:00
CommandLine.cpp	Fixing broken bots.	2015-02-13 23:10:31 +00:00
Compression.cpp
ConvertUTF.c
ConvertUTFWrapper.cpp	Make UTF8->UTF16 conversion null terminate output on empty input.	2015-02-08 18:08:51 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
DataStream.cpp
Debug.cpp
DeltaAlgorithm.cpp
Dwarf.cpp	Support: Add dwarf::getOperationEncoding()	2015-02-13 01:05:00 +00:00
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileOutputBuffer.cpp
FileUtilities.cpp
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp
Hashing.cpp
Host.cpp	We require MSVC 1800 as our minimum, so these checks can safely go away; NFC.	2015-02-16 18:23:00 +00:00
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
IsInf.cpp
IsNAN.cpp
LEB128.cpp
LineIterator.cpp
LLVMBuild.txt
Locale.cpp
LockFileManager.cpp	Reduce the LockFileManager timeout, and provide unsafeRemoveLockFile	2015-02-09 20:34:24 +00:00
Makefile
ManagedStatic.cpp
MathExtras.cpp
MD5.cpp
Memory.cpp
MemoryBuffer.cpp
MemoryObject.cpp
Mutex.cpp
Options.cpp
Path.cpp	Revert "Change Path::filename_pos() to skip the drive letter."	2015-02-12 00:05:49 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp	Fix the preprocessor checks used to determine if backtraces have been enabled.	2015-01-29 07:53:13 +00:00
Process.cpp
Program.cpp
RandomNumberGenerator.cpp
raw_os_ostream.cpp
raw_ostream.cpp	Format: Modernize using variadic templates.	2015-02-15 22:15:41 +00:00
README.txt.system
regcclass.h
regcname.h
regcomp.c	Avoid integer overflows around realloc calls resulting in potential	2015-02-07 21:24:06 +00:00
regengine.inc
regerror.c
regex2.h
regex_impl.h
Regex.cpp
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp
ScaledNumber.cpp
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp
SpecialCaseList.cpp	SpecialCaseList: Add support for parsing multiple input files.	2015-02-04 17:39:48 +00:00
Statistic.cpp
StreamingMemoryObject.cpp	Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.	2015-02-15 22:54:22 +00:00
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp
SystemUtils.cpp
TargetRegistry.cpp
Threading.cpp
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp	Triple: Make setEnvironment not override the object format	2015-02-13 22:05:50 +00:00
Twine.cpp
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp
YAMLTraits.cpp	Remove trailing whitespace. NFC ®	2015-01-26 18:02:18 +00:00

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