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llvm-6502/include/llvm/Target
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Evan Cheng 9fe2009956 Sorry, several patches in one. 
TargetInstrInfo:
Change produceSameValue() to take MachineRegisterInfo as an optional argument.
When in SSA form, targets can use it to make more aggressive equality analysis.

Machine LICM:
1. Eliminate isLoadFromConstantMemory, use MI.isInvariantLoad instead.
2. Fix a bug which prevent CSE of instructions which are not re-materializable.
3. Use improved form of produceSameValue.

ARM:
1. Teach ARM produceSameValue to look pass some PIC labels.
2. Look for operands from different loads of different constant pool entries
   which have same values.
3. Re-implement PIC GA materialization using movw + movt. Combine the pair with
   a "add pc" or "ldr [pc]" to form pseudo instructions. This makes it possible
   to re-materialize the instruction, allow machine LICM to hoist the set of
   instructions out of the loop and make it possible to CSE them. It's a bit
   hacky, but it significantly improve code quality.
4. Some minor bug fixes as well.

With the fixes, using movw + movt to materialize GAs significantly outperform the
load from constantpool method. 186.crafty and 255.vortex improved > 20%, 254.gap
and 176.gcc ~10%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123905 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-20 08:34:58 +00:00
..
Mangler.h
SubtargetFeature.h Merge System into Support. 2010-11-29 18:16:10 +00:00
Target.td Do not model all INLINEASM instructions as having unmodelled side effects. 2011-01-07 23:50:32 +00:00
TargetAsmBackend.h Remove the MCObjectFormat class. 2010-12-18 05:37:28 +00:00
TargetAsmInfo.h Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
TargetAsmLexer.h
TargetAsmParser.h implement rdar://8456378 and PR7557 - support for the fstsw, 2010-09-29 01:50:45 +00:00
TargetCallingConv.h Inside the calling convention logic LocVT is always a simple 2010-11-03 11:35:31 +00:00
TargetCallingConv.td
TargetData.h fix typo 2011-01-15 06:27:35 +00:00
TargetELFWriterInfo.h Jim Asked us to move DataLayout on ARM back to the most specialized classes. Do 2010-10-03 18:59:45 +00:00
TargetFrameLowering.h Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
TargetInstrDesc.h Merge System into Support. 2010-11-29 18:16:10 +00:00
TargetInstrInfo.h Sorry, several patches in one. 2011-01-20 08:34:58 +00:00
TargetInstrItineraries.h Various bits of framework needed for precise machine-level selection 2010-12-24 05:03:26 +00:00
TargetIntrinsicInfo.h
TargetJITInfo.h Merge System into Support. 2010-11-29 18:16:10 +00:00
TargetLowering.h Re-implement r122936 with proper target hooks. Now getMaxStoresPerMemcpy 2011-01-06 06:52:41 +00:00
TargetLoweringObjectFile.h
TargetMachine.h Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
TargetOpcodes.h
TargetOptions.h
TargetRegisterInfo.h Remove TargetRegisterInfo::NoRegister. 2011-01-09 23:20:48 +00:00
TargetRegistry.h MC: Make TargetAsmBackend available to the AsmStreamer. 2010-12-16 03:05:59 +00:00
TargetSchedule.td Comments about operand cycles and pipeline forwarding pathes. 2010-09-30 22:01:50 +00:00
TargetSelect.h
TargetSelectionDAG.td Add ARM patterns to match EXTRACT_SUBVECTOR nodes. 2011-01-07 04:59:04 +00:00
TargetSelectionDAGInfo.h
TargetSubtarget.h