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
..
AddrModeMatcher.cpp	Fix compiler warning about uninitialized variables. No functional change.	2009-02-27 06:29:31 +00:00
BasicBlockUtils.cpp	Skip ptr-to-ptr bitcasts when counting in another case.	2009-03-04 02:06:53 +00:00
BasicInliner.cpp	Changed option name from inline-threshold to basic-inline-threshold because	2009-02-23 07:07:56 +00:00
BreakCriticalEdges.cpp	Rename getAnalysisToUpdate to getAnalysisIfAvailable.	2009-01-28 13:14:17 +00:00
CloneFunction.cpp	Do not clone llvm.dbg.func.start and corresponding llvm.dbg.region.end during inlining.	2009-02-10 07:48:18 +00:00
CloneLoop.cpp	Rename getAnalysisToUpdate to getAnalysisIfAvailable.	2009-01-28 13:14:17 +00:00
CloneModule.cpp
CloneTrace.cpp
CMakeLists.txt	Add AddrModeMatcher.cpp	2009-02-21 07:05:11 +00:00
CodeExtractor.cpp
DemoteRegToStack.cpp
InlineCost.cpp	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
InlineFunction.cpp	Revert unintended commmit.	2009-03-04 02:09:48 +00:00
InstructionNamer.cpp
LCSSA.cpp	Simplify the logic of getting hold of a PHI predecessor block.	2009-01-23 19:40:15 +00:00
Local.cpp	Add "check/remove dbg var" helper routines.	2009-03-06 00:19:37 +00:00
LoopSimplify.cpp	Rename getAnalysisToUpdate to getAnalysisIfAvailable.	2009-01-28 13:14:17 +00:00
LowerAllocations.cpp	Rename getABITypeSize to getTypePaddedSize, as	2009-01-12 20:38:59 +00:00
LowerInvoke.cpp	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
LowerSwitch.cpp
Makefile
Mem2Reg.cpp	Just roll back the previous change to -mem2reg.	2009-02-20 17:49:33 +00:00
PromoteMemoryToRegister.cpp	Tweak the check for promotable alloca's to handle	2009-03-06 00:42:50 +00:00
SimplifyCFG.cpp	Fix another case where debug info interferes with	2009-03-06 21:08:33 +00:00
UnifyFunctionExitNodes.cpp
UnrollLoop.cpp
ValueMapper.cpp