Duncan Sands 667d4b8de6 Introduce new linkage types linkonce_odr, weak_odr, common_odr ... and extern_weak_odr. These are the same as the non-odr versions, except that they indicate that the global will only be overridden by an *equivalent* global. In C, a function with weak linkage can be overridden by a function which behaves completely differently. This means that IP passes have to skip weak functions, since any deductions made from the function definition might be wrong, since the definition could be replaced by something completely different at link time. This is not allowed in C++, thanks to the ODR (One-Definition-Rule): if a function is replaced by another at link-time, then the new function must be the same as the original function. If a language knows that a function or other global can only be overridden by an equivalent global, it can give it the weak_odr linkage type, and the optimizers will understand that it is alright to make deductions based on the function body. The code generators on the other hand map weak and weak_odr linkage to the same thing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66339 91177308-0d34-0410-b5e6-96231b3b80d8		2009-03-07 15:45:40 +00:00
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CommandGuide	Document the -gcc-tool-args bugpoint option.	2009-03-02 23:15:59 +00:00
HistoricalNotes
img	For PR1067:	2007-02-04 00:17:35 +00:00
tutorial	mention rdynamic, PR3431, patch by Stein Roger Skafløtten!	2009-02-09 00:04:40 +00:00
AliasAnalysis.html	Recommit this grammar fix that was backed out along with nocapture.	2008-12-18 02:15:05 +00:00
BitCodeFormat.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
Bugpoint.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
CFEBuildInstrs.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
CMake.html	CMake: Added some VC++ specific info to CMake.html.	2008-12-31 14:36:41 +00:00
CodeGenerator.html	Add some documentation for address-space-based access to the segment registers.	2009-01-26 02:54:45 +00:00
CodingStandards.html	So *this* is where all the trailing whitespace in file header comments come	2009-01-02 16:58:42 +00:00
CommandLine.html	Improve -fno-opt style option processing to not require an extra	2009-02-02 22:48:49 +00:00
CompilerDriver.html	Rename getAnalysisToUpdate to getAnalysisIfAvailable.	2009-01-28 13:14:17 +00:00
CompilerDriverTutorial.html	Add a comment to the auto-generated docs.	2008-12-13 17:51:47 +00:00
CompilerWriterInfo.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
DeveloperPolicy.html	lex and bison aren't needed to build llvm anymore.	2009-01-02 07:10:51 +00:00
doxygen.cfg.in	Upgrade doxygen.	2008-09-18 16:32:28 +00:00
doxygen.css	Upgrade in preparation for doxygen 1.4.4. The config file format changed,	2006-05-15 21:36:13 +00:00
doxygen.footer	update year	2009-02-27 11:28:46 +00:00
doxygen.header
doxygen.intro
ExceptionHandling.html	Clarify a bit. Based on feedback by Talin.	2008-12-29 15:27:32 +00:00
ExtendingLLVM.html	Removed warnings from HTML 4.01 validator: trailing slashes in <br> and <img>	2008-12-11 18:23:24 +00:00
FAQ.html	fix broken GCC bugzilla link	2009-03-02 19:11:53 +00:00
GarbageCollection.html	Committing unsaved changes that should've been with r66237.	2009-03-06 02:42:47 +00:00
GCCFEBuildInstrs.html	* Wrap command line flag in <tt>	2009-01-03 02:35:05 +00:00
GetElementPtr.html	Removed warnings from HTML 4.01 validator: trailing slashes in <br> and <img>	2008-12-11 18:23:24 +00:00
GettingStarted.html	This bug's been fixed but a version with the fix hasn't been released yet.	2009-03-03 05:41:16 +00:00
GettingStartedVS.html	lex and bison aren't needed to build llvm anymore.	2009-01-02 07:10:51 +00:00
GoldPlugin.html	Add a quickstart example.	2009-03-01 21:55:10 +00:00
HowToReleaseLLVM.html	Removed warnings from HTML 4.01 validator: trailing slashes in <br> and <img>	2008-12-11 18:23:24 +00:00
HowToSubmitABug.html	Removed warnings from HTML 4.01 validator: trailing slashes in <br> and <img>	2008-12-11 18:23:24 +00:00
index.html	move gold plugin next to LTO doc in the subsystem section	2009-03-01 23:42:51 +00:00
LangRef.html	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Lexicon.html	Fixed HTML validator warning.	2008-12-14 08:01:51 +00:00
LinkTimeOptimization.html	* Comply with HTML 4.01 Strict	2008-12-16 03:07:49 +00:00
llvm.css	Minimize the width of the notes region: it will end where the text ends, if the	2008-12-29 21:25:09 +00:00
Makefile	Add a unified 'generated documentation' target so the web site script has a consistent target to use.	2008-03-31 17:27:57 +00:00
MakefileGuide.html	Remove libtool.	2009-02-26 07:44:16 +00:00
Passes.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
ProgrammersManual.html	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Projects.html	Fix the instructions to work even when PATH does not contain ".".	2009-01-12 21:29:24 +00:00
ReleaseNotes.html	Add some more clang related release notes.	2009-03-02 20:08:12 +00:00
SourceLevelDebugging.html	Each input file is encoded as a separate compile unit in LLVM debugging	2009-01-30 18:20:31 +00:00
SystemLibrary.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
TableGenFundamentals.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
TestingGuide.html	Global replace of yellow W3C "valid HTML/CSS" icons with blue ones.	2008-12-11 17:34:48 +00:00
UsingLibraries.html	Removed warnings from HTML 4.01 validator: trailing slashes in <br> and <img>	2008-12-11 18:23:24 +00:00
WritingAnLLVMBackend.html	SDOperand has been renamed to SDValue. SDNode::Val is now	2009-01-28 21:36:46 +00:00
WritingAnLLVMPass.html	Eliminate several more unnecessary intptr_t casts.	2009-02-18 05:09:16 +00:00