Nick Lewycky fad4d40f37 Teach GlobalOpt to handle atomic accesses to globals. ... * Most of the transforms come through intact by having each transformed load or store copy the ordering and synchronization scope of the original. * The transform that turns a global only accessed in main() into an alloca (since main is non-recursive) with a store of the initial value uses an unordered store, since it's guaranteed to be the first thing to happen in main. (Threads may have started before main (!) but they can't have the address of a function local before the point in the entry block we insert our code.) * The heap-SRoA transforms are disabled in the face of atomic operations. This can probably be improved; it seems odd to have atomic accesses to an alloca that doesn't have its address taken. AnalyzeGlobal keeps track of the strongest ordering found in any use of the global. This is more information than we need right now, but it's cheap to compute and likely to be useful. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149847 91177308-0d34-0410-b5e6-96231b3b80d8		2012-02-05 19:56:38 +00:00
..
Analysis	Persuade GCC that there is nothing worth warning about here (there isn't).	2012-02-05 14:20:11 +00:00
Archive	Avoid using an invalidated iterator.	2012-01-23 05:07:16 +00:00
AsmParser	reapply the patches reverted in r149470 that reenable ConstantDataArray,	2012-02-05 02:29:43 +00:00
Bitcode	Improve the bitcode reader's handling of constant strings to use	2012-02-05 02:41:35 +00:00
CodeGen	Persuade GCC that there is nothing worth warning about here (there isn't).	2012-02-05 14:20:11 +00:00
DebugInfo	More dead code removal (using -Wunreachable-code)	2012-01-20 21:51:11 +00:00
ExecutionEngine	Explain to the compiler why TargetAddr is not used uninitialized later.	2012-02-05 14:14:35 +00:00
Linker	use Constant::getAggregateElement to simplify a bunch of code.	2012-01-25 06:48:06 +00:00
MC	Modified the Enhanced Disassembler to create and	2012-02-04 07:45:35 +00:00
Object	Object: avoid undefined behavior when bounds-checking	2012-02-04 02:41:39 +00:00
Support	Persuade GCC that there is nothing worth warning about here (there isn't).	2012-02-05 14:20:11 +00:00
TableGen	Implement String Cast from Integer	2012-01-30 20:47:04 +00:00
Target	DefinesPredicate should only look for def operands. Patch by Ludwig Meier.	2012-02-05 19:55:04 +00:00
Transforms	Teach GlobalOpt to handle atomic accesses to globals.	2012-02-05 19:56:38 +00:00
VMCore	reapply the patches reverted in r149470 that reenable ConstantDataArray,	2012-02-05 02:29:43 +00:00
CMakeLists.txt	Move TableGen's parser and entry point into a library	2011-10-01 16:41:13 +00:00
LLVMBuild.txt	LLVMBuild: Introduce a common section which currently has a list of the	2011-12-12 22:45:54 +00:00
Makefile	Remove more of llvmc and dependencies.	2011-09-20 00:34:27 +00:00