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llvm-6502/include/llvm/CodeGen
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Juergen Ributzka f08cddcf56 Reapply [FastISel] Let the target decide first if it wants to materialize a constant (215588). 
Note: This was originally reverted to track down a buildbot error. This commit
exposed a latent bug that was fixed in r215753. Therefore it is reapplied
without any modifications.

I run it through SPEC2k and SPEC2k6 for AArch64 and it didn't introduce any new
regeressions.

Original commit message:
This changes the order in which FastISel tries to materialize a constant.
Originally it would try to use a simple target-independent approach, which
can lead to the generation of inefficient code.

On X86 this would result in the use of movabsq to materialize any 64bit
integer constant - even for simple and small values such as 0 and 1. Also
some very funny floating-point materialization could be observed too.

On AArch64 it would materialize the constant 0 in a register even the
architecture has an actual "zero" register.

On ARM it would generate unnecessary mov instructions or not use mvn.

This change simply changes the order and always asks the target first if it
likes to materialize the constant. This doesn't fix all the issues
mentioned above, but it enables the targets to implement such
optimizations.

Related to <rdar://problem/17420988>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216006 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-19 19:05:24 +00:00
..
PBQP Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
Analysis.h Refactor duplicated code. 2014-07-30 19:42:16 +00:00
AsmPrinter.h Debug info: Infrastructure to support debug locations for fragmented 2014-08-01 22:11:58 +00:00
CalcSpillWeights.h CalcSpillWeights: allow overidding the spill weight normalizing function 2013-11-11 19:56:14 +00:00
CallingConvLower.h Remove the target machine from CCState. Previously it was only used 2014-08-06 18:45:26 +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 Reapply [FastISel] Let the target decide first if it wants to materialize a constant (215588). 2014-08-19 19:05:24 +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 CodeGen: extend f16 conversions to permit types > float. 2014-07-17 10:51:23 +00:00
JITCodeEmitter.h Temporarily Revert "Nuke the old JIT." as it's not quite ready to 2014-08-07 22:02:54 +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 Revert "Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size." 2014-08-18 00:24:38 +00:00
LinkAllAsmWriterComponents.h
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 Canonicalize header guards into a common format. 2014-08-13 16:26:38 +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 Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
LiveRangeEdit.h Remove the TargetMachine forwards for TargetSubtargetInfo based 2014-08-04 21:25:23 +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 Fix missing const 2014-07-02 06:45:26 +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
MachineCombinerPattern.h MachineCombiner Pass for selecting faster instruction 2014-08-03 21:35:39 +00:00
MachineConstantPool.h CodeGen: Add a getSectionKind method to MachineConstantPoolEntry 2014-07-14 22:06:29 +00:00
MachineDominanceFrontier.h Try to fix MSVC build 2014-07-12 23:09:02 +00:00
MachineDominators.h [MachineDominatorTree] Provide a method to inform a MachineDominatorTree that a 2014-08-13 21:00:07 +00:00
MachineFrameInfo.h Make isAliased property for fixed-offset stack objects adjustable 2014-08-16 00:17:02 +00:00
MachineFunction.h Have MachineFunction cache a pointer to the subtarget to make lookups 2014-08-05 02:39:49 +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 [Cleanup] Utility function to erase instruction and mark DBG_Values 2014-08-13 21:15:23 +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 AA metadata refactoring (introduce AAMDNodes) 2014-07-24 12:16:19 +00:00
MachineModuleInfo.h Delete dead code. NFC. 2014-08-15 14:58:22 +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
MachineRegionInfo.h Templatify RegionInfo so it works on MachineBasicBlocks 2014-07-19 18:29:29 +00:00
MachineRegisterInfo.h Have MachineRegisterInfo take and store the MachineFunction it 2014-08-12 08:00:56 +00:00
MachineRelocation.h
MachineScheduler.h Move remaining LLVM_ENABLE_DUMP conditionals out of the headers 2014-07-01 21:19:13 +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 Canonicalize header guards into a common format. 2014-08-13 16:26:38 +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 MachineCombiner Pass for selecting faster instruction 2014-08-03 21:35:39 +00:00
PseudoSourceValue.h Fix broken build of llvm using clang. 2014-04-15 08:10:46 +00:00
RegAllocPBQP.h Sure up ownership passing of the PBQPBuilder by passing unique_ptrs by value rather than lvalue reference. 2014-07-19 21:19:45 +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 Move remaining LLVM_ENABLE_DUMP conditionals out of the headers 2014-07-01 21:19:13 +00:00
RegisterScavenging.h Changed the liveness tracking in the RegisterScavenger 2014-08-04 23:07:49 +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 CodeGen: generate single libcall for fptrunc -> f16 operations. 2014-07-17 11:12:12 +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 Move remaining LLVM_ENABLE_DUMP conditionals out of the headers 2014-07-01 21:19:13 +00:00
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 [PowerPC] Implement PPCTargetLowering::getTgtMemIntrinsic 2014-08-13 01:15:40 +00:00
SelectionDAGISel.h Remove the TargetMachine forwards for TargetSubtargetInfo based 2014-08-04 21:25:23 +00:00
SelectionDAGNodes.h Revert "Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size." 2014-08-18 00:24:38 +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 Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
StackMaps.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +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 CodeGen: Stick constant pool entries in COMDAT sections for WinCOFF 2014-07-14 22:57:27 +00:00
TargetSchedule.h MachineCombiner Pass for selecting faster instruction 2014-08-03 21:35:39 +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
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