llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-10 01:10:48 +00:00

History

Rafael Espindola e08aac49ea Use mkdir instead of stat+mkdir. This is an optimistic version of create_diretories: it tries to create the directory first and looks at the parent only if that fails. Running strace on "mkdir -p" shows that it is pessimistic, calling mkdir on every element of the path. We could implement that if needed. In any case, with both strategies there is no reason to call stat, just check the return of mkdir. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201347 91177308-0d34-0410-b5e6-96231b3b80d8		2014-02-13 16:58:19 +00:00
..
Unix	Remove dead code.	2014-02-13 13:45:45 +00:00
Windows	Remove dead code.	2014-02-13 13:45:45 +00:00
Allocator.cpp
APFloat.cpp	Fix known typos	2014-01-24 17:20:08 +00:00
APInt.cpp	Fix known typos	2014-01-24 17:20:08 +00:00
APSInt.cpp
ARMBuildAttrs.cpp	ARM: update build attributes for ABI r2.09	2014-01-19 08:25:35 +00:00
Atomic.cpp
BlockFrequency.cpp	[block-freq] Add a right shift to BlockFrequency that saturates at 1.	2013-12-14 02:24:22 +00:00
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt	[CMake] LLVMSupport should be responsible to provide system_libs.	2014-02-10 10:52:19 +00:00
CommandLine.cpp	Fix an invalid check for duplicate option categories.	2014-02-07 17:42:30 +00:00
Compression.cpp
ConstantRange.cpp
ConvertUTF.c
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp	Rename Windows.h to WindowsSupport.h to avoid ambiguity	2014-02-12 21:26:20 +00:00
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
DataStream.cpp
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp	Dwarf: Fix a copy-paste bug.	2013-12-22 10:23:23 +00:00
DynamicLibrary.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
Errno.cpp
ErrorHandling.cpp	Roll back the ConstStringRef change for now	2014-01-27 05:24:39 +00:00
FileOutputBuffer.cpp	Use the simpler version of sys::fs::remove when possible.	2014-01-10 21:40:29 +00:00
FileUtilities.cpp
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp	Use the simpler version of sys::fs::remove when possible.	2014-01-10 21:40:29 +00:00
Hashing.cpp
Host.cpp	Add support for krait cpu in llvm::sys::getHostCPUName()	2013-12-20 09:24:13 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
IsInf.cpp
IsNAN.cpp
LineIterator.cpp	Use two variables here rather than reusing (and abusing) one. This is	2013-12-27 04:44:35 +00:00
LLVMBuild.txt
Locale.cpp
LockFileManager.cpp	Use simpler version of sys::fs::exists when possible.	2014-02-13 04:00:35 +00:00
Makefile
ManagedStatic.cpp
MD5.cpp
Memory.cpp
MemoryBuffer.cpp	MemoryBuffer: Increase the alignment of small file buffers to 16	2013-12-16 18:18:12 +00:00
MemoryObject.cpp
Mutex.cpp	Remove unnecessary call to pthread_mutexattr_setpshared()	2014-01-29 00:20:44 +00:00
Path.cpp	Use mkdir instead of stat+mkdir.	2014-02-13 16:58:19 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
Process.cpp	Hopefully fixing the MinGW 32 build, which was broken by r200767. Not using rand_s() since MinGW does not have an implementation for it, but instead using the underlying CryptGenRandom APIs.	2014-02-11 02:47:33 +00:00
Program.cpp
raw_os_ostream.cpp
raw_ostream.cpp	raw_fd_ostream: Don't change STDERR to O_BINARY, or w*printf() (in assert()) would barf wide chars after llvm::errs().	2014-01-12 16:14:24 +00:00
README.txt.system
regcclass.h
regcname.h
regcomp.c	Fix known typos	2014-01-24 17:20:08 +00:00
regengine.inc
regerror.c
regex2.h
regex_impl.h
Regex.cpp	Make llvm::Regex non-copyable but movable.	2014-01-02 19:04:59 +00:00
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp	Rename the non-templated base class of SmallPtrSet to	2014-02-03 11:24:18 +00:00
SmallVector.cpp
SourceMgr.cpp
Statistic.cpp
StreamableMemoryObject.cpp
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp
StringRefMemoryObject.cpp
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp	Fix pr18235.	2013-12-13 16:05:32 +00:00
Threading.cpp	Rename Windows.h to WindowsSupport.h to avoid ambiguity	2014-02-12 21:26:20 +00:00
ThreadLocal.cpp	Silence g++ 4.9 build issue	2013-12-31 03:16:55 +00:00
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp	Use the simpler version of sys::fs::remove when possible.	2014-01-10 21:40:29 +00:00
Triple.cpp	[x86] Support i386---code16 triple for emitting 16-bit code	2014-01-20 12:02:25 +00:00
Twine.cpp
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp	[weak vtables] Remove a bunch of weak vtables	2013-11-19 00:57:56 +00:00
YAMLTraits.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +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