Tim Northover 8f2a85e099 IR: add "cmpxchg weak" variant to support permitted failure. ... This commit adds a weak variant of the cmpxchg operation, as described in C++11. A cmpxchg instruction with this modifier is permitted to fail to store, even if the comparison indicated it should. As a result, cmpxchg instructions must return a flag indicating success in addition to their original iN value loaded. Thus, for uniformity *all* cmpxchg instructions now return "{ iN, i1 }". The second flag is 1 when the store succeeded. At the DAG level, a new ATOMIC_CMP_SWAP_WITH_SUCCESS node has been added as the natural representation for the new cmpxchg instructions. It is a strong cmpxchg. By default this gets Expanded to the existing ATOMIC_CMP_SWAP during Legalization, so existing backends should see no change in behaviour. If they wish to deal with the enhanced node instead, they can call setOperationAction on it. Beware: as a node with 2 results, it cannot be selected from TableGen. Currently, no use is made of the extra information provided in this patch. Test updates are almost entirely adapting the input IR to the new scheme. Summary for out of tree users: ------------------------------ + Legacy Bitcode files are upgraded during read. + Legacy assembly IR files will be invalid. + Front-ends must adapt to different type for "cmpxchg". + Backends should be unaffected by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210903 91177308-0d34-0410-b5e6-96231b3b80d8		2014-06-13 14:24:07 +00:00
..
AsmWriter.cpp	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
AsmWriter.h
AttributeImpl.h
Attributes.cpp	Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.	2014-06-05 19:29:43 +00:00
AutoUpgrade.cpp	[X86] Auto-upgrade AVX1 vbroadcast intrinsics	2014-05-29 23:35:33 +00:00
BasicBlock.cpp	[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.	2014-04-15 06:32:26 +00:00
CMakeLists.txt
ConstantFold.cpp	[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.	2014-04-15 06:32:26 +00:00
ConstantFold.h
ConstantRange.cpp
Constants.cpp	[IR] Make {extract,insert}element accept an index of any integer type.	2014-05-01 22:12:39 +00:00
ConstantsContext.h	Try to fix the msvc build.	2014-04-29 23:37:02 +00:00
Core.cpp	Remove 'using std::errro_code' from lib.	2014-06-13 02:24:39 +00:00
DataLayout.cpp	Use pointer size function where only a pointer is expected	2014-04-23 21:10:15 +00:00
DebugInfo.cpp	PR19598: Provide the ability to RAUW a declaration with itself, creating a non-temporary copy and using that to RAUW.	2014-05-06 03:41:57 +00:00
DebugLoc.cpp	Add missing const specifier to a const method.	2014-06-05 14:32:15 +00:00
DiagnosticInfo.cpp	Remove LLVMContextImpl::optimizationRemarkEnabledFor.	2014-05-22 17:19:01 +00:00
DiagnosticPrinter.cpp
DIBuilder.cpp	DebugInfo: Add FIXME regarding DILexicalBlock uniquing fields.	2014-05-15 20:09:55 +00:00
Dominators.cpp
Function.cpp	Add 'nonnull', a new parameter and return attribute which indicates that the pointer is not null. Instcombine will elide comparisons between these and null. Patch by Luqman Aden!	2014-05-20 01:23:40 +00:00
GCOV.cpp	Remove 'using std::errro_code' from lib.	2014-06-13 02:24:39 +00:00
Globals.cpp	Fix gcc -Wparentheses warning.	2014-06-04 11:21:11 +00:00
GVMaterializer.cpp
InlineAsm.cpp
Instruction.cpp	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
Instructions.cpp	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
IntrinsicInst.cpp
IRBuilder.cpp
IRPrintingPasses.cpp	Fix some misplaced spaces around 'override'	2014-05-24 20:19:40 +00:00
LeakDetector.cpp
LeaksContext.h	[C++] Use 'nullptr'.	2014-04-28 04:05:08 +00:00
LegacyPassManager.cpp	Add C API for thread yielding callback.	2014-05-16 02:33:15 +00:00
LLVMBuild.txt
LLVMContext.cpp	Remove LLVMContextImpl::optimizationRemarkEnabledFor.	2014-05-22 17:19:01 +00:00
LLVMContextImpl.cpp	Remove LLVMContextImpl::optimizationRemarkEnabledFor.	2014-05-22 17:19:01 +00:00
LLVMContextImpl.h	Remove LLVMContextImpl::optimizationRemarkEnabledFor.	2014-05-22 17:19:01 +00:00
Makefile
Mangler.cpp
MDBuilder.cpp	[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.	2014-04-15 06:32:26 +00:00
Metadata.cpp	[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.	2014-04-15 06:32:26 +00:00
Module.cpp	Remove 'using std::errro_code' from lib.	2014-06-13 02:24:39 +00:00
module.modulemap	[modules] Add module maps for LLVM. These are not quite ready for prime-time	2014-05-21 02:46:14 +00:00
Pass.cpp	Remove pimpl class from PassRegistry.	2014-06-12 16:06:51 +00:00
PassManager.cpp	Add C API for thread yielding callback.	2014-05-16 02:33:15 +00:00
PassRegistry.cpp	Remove pimpl class from PassRegistry.	2014-06-12 16:06:51 +00:00
SymbolTableListTraitsImpl.h	[C++] Use 'nullptr'.	2014-04-28 04:05:08 +00:00
Type.cpp	[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.	2014-04-15 06:32:26 +00:00
TypeFinder.cpp
Use.cpp
User.cpp
Value.cpp	Convert StringMapEntry::Create to use StringRef instead of start/end pointers. Simpliies all in tree call sites. No functional change.	2014-06-11 05:35:56 +00:00
ValueSymbolTable.cpp	[Modules] Remove potential ODR violations by sinking the DEBUG_TYPE	2014-04-22 02:02:50 +00:00
ValueTypes.cpp
Verifier.cpp	Fix verifier for GlobalAliases to avoid recursing into global initializers.	2014-06-12 01:46:54 +00:00