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llvm-6502/include/llvm/Target
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Evan Cheng 376642ed62 Some enhancements for memcpy / memset inline expansion. 
1. Teach it to use overlapping unaligned load / store to copy / set the trailing
   bytes. e.g. On 86, use two pairs of movups / movaps for 17 - 31 byte copies.
2. Use f64 for memcpy / memset on targets where i64 is not legal but f64 is. e.g.
   x86 and ARM.
3. When memcpy from a constant string, do *not* replace the load with a constant
   if it's not possible to materialize an integer immediate with a single
   instruction (required a new target hook: TLI.isIntImmLegal()).
4. Use unaligned load / stores more aggressively if target hooks indicates they
   are "fast".
5. Update ARM target hooks to use unaligned load / stores. e.g. vld1.8 / vst1.8.
   Also increase the threshold to something reasonable (8 for memset, 4 pairs
   for memcpy).

This significantly improves Dhrystone, up to 50% on ARM iOS devices.

rdar://12760078


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169791 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-10 23:21:26 +00:00
..
Mangler.h
Target.td
TargetCallingConv.h
TargetCallingConv.td
TargetFrameLowering.h Stack Alignment: when creating stack objects in MachineFrameInfo, make sure 2012-12-04 00:52:33 +00:00
TargetInstrInfo.h Sort the #include lines for the include/... tree with the script. 2012-12-03 17:02:12 +00:00
TargetIntrinsicInfo.h
TargetItinerary.td
TargetJITInfo.h Sort the #include lines for the include/... tree with the script. 2012-12-03 17:02:12 +00:00
TargetLibraryInfo.h Sort the #include lines for the include/... tree with the script. 2012-12-03 17:02:12 +00:00
TargetLowering.h Some enhancements for memcpy / memset inline expansion. 2012-12-10 23:21:26 +00:00
TargetLoweringObjectFile.h Sort the #include lines for the include/... tree with the script. 2012-12-03 17:02:12 +00:00
TargetMachine.h Sort the #include lines for the include/... tree with the script. 2012-12-03 17:02:12 +00:00
TargetOpcodes.h
TargetOptions.h
TargetRegisterInfo.h Remove two dead functions resulting from a bad rebase. 2012-12-05 18:52:15 +00:00
TargetSchedule.td
TargetSelectionDAG.td
TargetSelectionDAGInfo.h
TargetSubtargetInfo.h
TargetTransformImpl.h LoopVectorize: support vectorizing intrinsic calls 2012-12-09 20:42:17 +00:00