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llvm-6502/include/llvm/CodeGen
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Juergen Ributzka eb1c51f8b3 [FastISel] Let the target decide first if it wants to materialize a constant. 
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@215588 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-13 22:08:02 +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 Refactor DAGCombinerInfo. Change the different booleans that indicate if we are before or after different runs of DAGCo, with the CombineLevel enum. 2012-12-27 06:47:41 +00:00
DFAPacketizer.h Sort the #include lines for the include/... tree with the script. 2012-12-03 17:02:12 +00:00
EdgeBundles.h [modules] "Specialize" a function by actually specializing a function template 2014-04-24 18:27:29 +00:00
FastISel.h [FastISel] Let the target decide first if it wants to materialize a constant. 2014-08-13 22:08:02 +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 Mark unimplemented copy constructors and copy assignment operators as LLVM_DELETED_FUNCTION. 2012-09-17 06:59:23 +00:00
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 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 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 Re-apply r211399, "Generate native unwind info on Win64" with a fix to ignore SEH pseudo ops in X86 JIT emitter. 2014-06-25 12:41:52 +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 Sort the #include lines for the include/... tree with the script. 2012-12-03 17:02:12 +00:00
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 [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 Rename virtual table anchors from Anchor() to anchor() for consistency with the rest of the tree. 2012-09-26 06:36:36 +00:00
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 [typo] An LLVM. 2013-08-16 23:30:19 +00:00
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 Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
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 Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
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 Fix include guards so they exactly match file names. 2013-01-10 00:45:19 +00:00
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 Fix classof for ISD::INTRINSIC_W_CHAIN and INTRINSIC_VOID 2014-08-13 01:15:37 +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 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