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
Target.td	Do not model all INLINEASM instructions as having unmodelled side effects.	2011-01-07 23:50:32 +00:00
TargetAsmBackend.h
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
TargetCallingConv.h
TargetCallingConv.td
TargetData.h	fix typo	2011-01-15 06:27:35 +00:00
TargetELFWriterInfo.h
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
TargetInstrInfo.h	Sorry, several patches in one.	2011-01-20 08:34:58 +00:00
TargetInstrItineraries.h
TargetIntrinsicInfo.h
TargetJITInfo.h
TargetLowering.h
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
TargetSchedule.td
TargetSelect.h
TargetSelectionDAG.td	Add ARM patterns to match EXTRACT_SUBVECTOR nodes.	2011-01-07 04:59:04 +00:00
TargetSelectionDAGInfo.h
TargetSubtarget.h