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llvm-6502/include/llvm/CodeGen
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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
..
PBQP Function defined in a header should be inline. Found by modules build. 2014-04-24 23:14:32 +00:00
Analysis.h Have isInTailCallPosition take the DAG so that we can use the 2014-06-10 20:39:38 +00:00
AsmPrinter.h CodeGen: refactor DwarfException 2014-06-11 01:19:03 +00:00
CalcSpillWeights.h CalcSpillWeights: allow overidding the spill weight normalizing function 2013-11-11 19:56:14 +00:00
CallingConvLower.h ARM: HFAs must be passed in consecutive registers 2014-05-09 14:01:47 +00:00
CommandFlags.h 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
DAGCombine.h
DFAPacketizer.h
EdgeBundles.h [modules] "Specialize" a function by actually specializing a function template 2014-04-24 18:27:29 +00:00
FastISel.h [FastISel][X86] Add MachineMemOperand to load/store instructions. 2014-06-12 23:27:57 +00:00
FunctionLoweringInfo.h [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
GCMetadata.h Use unique_ptr to manage ownership of GCStrategy objects in GCMetadata 2014-04-15 05:34:49 +00:00
GCMetadataPrinter.h
GCs.h Test commit: Remove trailing whitespace. 2014-03-10 22:24:07 +00:00
GCStrategy.h Use unique_ptr to manage ownership of GCFunctionInfos in GCStrategy 2014-04-15 06:07:26 +00:00
IntrinsicLowering.h Rename some member variables from TD to DL. 2014-02-18 15:33:12 +00:00
ISDOpcodes.h IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
JITCodeEmitter.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
JumpInstrTables.h Escape "@function" with \verbatim. [-Wdocumentation] 2014-06-08 23:25:02 +00:00
LatencyPriorityQueue.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
LexicalScopes.h DebugInfo: Reapply r209984 (reverted in r210143), asserting that abstract DbgVariables have DIEs. 2014-06-04 23:50:52 +00:00
LinkAllAsmWriterComponents.h Add a GC plugin for Erlang 2013-03-25 13:47:46 +00:00
LinkAllCodegenComponents.h [C++] Use 'nullptr'. 2014-04-24 06:44:33 +00:00
LiveInterval.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
LiveIntervalAnalysis.h Calculate dead instructions when a live interval is created. 2014-06-03 22:42:10 +00:00
LiveIntervalUnion.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
LivePhysRegs.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
LiveRangeEdit.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
LiveRegMatrix.h [C++11] Replace OwningPtr with std::unique_ptr in places where it doesn't break the API. 2014-04-21 09:34:48 +00:00
LiveStackAnalysis.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
LiveVariables.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-07 09:26:03 +00:00
MachineBasicBlock.h CodeGen: Make MachineBasicBlock::back skip to the beginning of the last bundle. 2014-05-24 13:13:17 +00:00
MachineBlockFrequencyInfo.h blockfreq: Remove unnecessary template parameters 2014-04-11 23:21:02 +00:00
MachineBranchProbabilityInfo.h blockfreq: Use const in MachineBlockFrequencyInfo 2014-03-25 18:01:32 +00:00
MachineCodeEmitter.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineCodeInfo.h [C++] Use 'nullptr'. 2014-04-24 06:44:33 +00:00
MachineConstantPool.h Directly access objects which may change during compilation. 2013-06-17 20:41:25 +00:00
MachineDominators.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-07 09:26:03 +00:00
MachineFrameInfo.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineFunction.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineFunctionAnalysis.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-07 09:26:03 +00:00
MachineFunctionPass.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-07 09:26:03 +00:00
MachineInstr.h Add iterator_range for MachineInstr defs. 2014-04-15 02:14:06 +00:00
MachineInstrBuilder.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineInstrBundle.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineJumpTableInfo.h
MachineLoopInfo.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-07 09:26:03 +00:00
MachineMemOperand.h Break PseudoSourceValue out of the Value hierarchy. It is now the root of its own tree containing FixedStackPseudoSourceValue (which you can use isa/dyn_cast on) and MipsCallEntry (which you can't). Anything that needs to use either a PseudoSourceValue* and Value* is strongly encouraged to use a MachinePointerInfo instead. 2014-04-15 07:22:52 +00:00
MachineModuleInfo.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineModuleInfoImpls.h
MachineOperand.h Clean up language and grammar. 2014-05-20 17:11:11 +00:00
MachinePassRegistry.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachinePostDominators.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineRegisterInfo.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineRelocation.h [typo] An LLVM. 2013-08-16 23:30:19 +00:00
MachineScheduler.h Fix the MachineScheduler's logic for updating ready times for in-order. 2014-06-07 01:48:43 +00:00
MachineSSAUpdater.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineTraceMetrics.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
MachineValueType.h Make the copy member of StringRef/ArrayRef generic wrt allocators. 2014-04-18 16:36:15 +00:00
MachORelocation.h
Passes.h 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
PseudoSourceValue.h Fix broken build of llvm using clang. 2014-04-15 08:10:46 +00:00
RegAllocPBQP.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
RegAllocRegistry.h
RegisterClassInfo.h [C++11] Replace OwningPtr with std::unique_ptr in places where it doesn't break the API. 2014-04-21 09:34:48 +00:00
RegisterPressure.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
RegisterScavenging.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
ResourcePriorityQueue.h [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
RuntimeLibcalls.h Fix filename in header comment 2013-11-16 15:40:54 +00:00
ScheduleDAG.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
ScheduleDAGInstrs.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
ScheduleDFS.h
ScheduleHazardRecognizer.h Add two additional hazard recognizer functions 2013-12-11 22:33:43 +00:00
SchedulerRegistry.h
ScoreboardHazardRecognizer.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
SelectionDAG.h IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
SelectionDAGISel.h Implememting named register intrinsics 2014-05-06 16:51:25 +00:00
SelectionDAGNodes.h IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
SlotIndexes.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
StackMapLivenessAnalysis.h [C++11] Add 'override' keyword to virtual methods that override their base class. 2014-03-07 09:26:03 +00:00
StackMaps.h [Stackmaps] Pacify windows buildbot. 2014-05-01 22:39:26 +00:00
StackProtector.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
TargetLoweringObjectFileImpl.h Fix a few issues with comdat handling on COFF. 2014-06-06 19:26:12 +00:00
TargetSchedule.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00
ValueTypes.h [C++11] More 'nullptr' conversion or in some cases just using a boolean check instead of comparing to nullptr. 2014-04-09 06:08:46 +00:00
ValueTypes.td Implement aarch64 neon instruction set AdvSIMD (Across). 2013-10-05 08:22:10 +00:00
VirtRegMap.h [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-14 00:51:57 +00:00