Chris Lattner b980578b41 Keep track of which registers are related to which other registers. ... Use this information to avoid doing expensive interval intersections for registers that could not possible be interesting. This speeds up linscan on ia64 compiling kc++ in release mode from taking 7.82s to 4.8s(!), total itanium llc time on this program is 27.3s now. This marginally speeds up PPC and X86, but they appear to be limited by other parts of linscan, not this code. On this program, on itanium, live intervals now takes 41% of llc time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22986 91177308-0d34-0410-b5e6-96231b3b80d8		2005-08-23 22:27:31 +00:00
..
SelectionDAG	Teach the SelectionDAG how to transform select_cc eq, X, 0, 1, 0 into	2005-08-23 05:41:12 +00:00
AsmPrinter.cpp	Culling out use of unions for converting FP to bits and vice versa.	2005-08-17 19:34:49 +00:00
BranchFolding.cpp
ELFWriter.cpp	Fix VC++ constant truncation warning.	2005-08-19 16:19:21 +00:00
IntrinsicLowering.cpp
LiveInterval.cpp
LiveInterval.h
LiveIntervalAnalysis.cpp	Fix debug info to not print out recently freed memory.	2005-07-27 23:11:25 +00:00
LiveIntervalAnalysis.h
LiveVariables.cpp
MachineBasicBlock.cpp
MachineCodeEmitter.cpp	new is not a valid default anywhere, so make this pure virtual	2005-07-28 18:13:59 +00:00
MachineFunction.cpp
MachineInstr.cpp
Makefile
Passes.cpp
PHIElimination.cpp
PhysRegTracker.h
PrologEpilogInserter.cpp
RegAllocIterativeScan.cpp
RegAllocLinearScan.cpp	Keep track of which registers are related to which other registers.	2005-08-23 22:27:31 +00:00
RegAllocLocal.cpp
RegAllocSimple.cpp
TwoAddressInstructionPass.cpp
UnreachableBlockElim.cpp
VirtRegMap.cpp
VirtRegMap.h