Chris Lattner fe1630b43e Force coallescing of live ranges that have a single definition, even if they ... interfere. Because these intervals have a single definition, and one of them is a copy instruction, they are always safe to merge even if their lifetimes interfere. This slightly reduces the amount of spill code, for example on 252.eon, from: 12837 spiller - Number of loads added 7604 spiller - Number of stores added 5842 spiller - Number of register spills 18155 liveintervals - Number of identity moves eliminated after coalescing to: 12754 spiller - Number of loads added 7585 spiller - Number of stores added 5803 spiller - Number of register spills 18262 liveintervals - Number of identity moves eliminated after coalescing The much much bigger win would be to merge intervals with multiple definitions (aka phi nodes) but this is not that day. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15124 91177308-0d34-0410-b5e6-96231b3b80d8		2004-07-23 05:26:05 +00:00
..
InstrForest.h
InstrScheduling.h
InstrSelection.h	Add a TmpInstruction ctor that doesn't take a MCFI.	2004-06-08 18:52:46 +00:00
IntrinsicLowering.h	Start moving IntrinsicLowering out of VMCore into libcodegen, as per PR346	2004-06-20 07:40:46 +00:00
LiveIntervalAnalysis.h	Force coallescing of live ranges that have a single definition, even if they	2004-07-23 05:26:05 +00:00
LiveVariables.h	There is no need to store the MBB along with the MI any more, we can now	2004-07-19 07:04:55 +00:00
MachineBasicBlock.h	Add a forwarding method pop_front() that allows you to delete instructions	2004-06-08 18:52:47 +00:00
MachineCodeEmitter.h
MachineCodeForInstruction.h	This class is no longer an annotation	2004-06-27 18:50:49 +00:00
MachineConstantPool.h
MachineFrameInfo.h
MachineFunction.h	Add viewCFG() and viewCFGOnly() APIs.	2004-07-08 00:47:58 +00:00
MachineFunctionInfo.h	Add a map of MachineCodeForInstruction objects to MachineFunctionInfo	2004-06-27 18:50:30 +00:00
MachineFunctionPass.h
MachineInstr.h	Fix comment	2004-07-19 13:28:39 +00:00
MachineInstrBuilder.h
Passes.h	Add Iterative scan register allocator.	2004-07-21 08:24:35 +00:00
SchedGraphCommon.h
SelectionDAG.h
SSARegMap.h
ValueSet.h
ValueTypes.h