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
..
InstrSched	Use new macro	2004-07-16 00:04:54 +00:00
ModuloScheduling	These files don't need to include <iostream> since they include "Support/Debug.h".	2004-07-21 20:50:33 +00:00
SelectionDAG	Add #include <iostream> since Value.h does not #include it any more.	2004-07-04 12:19:56 +00:00
IntrinsicLowering.cpp	Add #include <iostream> since Value.h does not #include it any more.	2004-07-04 12:19:56 +00:00
LiveIntervalAnalysis.cpp	Force coallescing of live ranges that have a single definition, even if they	2004-07-23 05:26:05 +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.cpp	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.cpp	Add #include <iostream> since Value.h does not #include it any more.	2004-07-04 12:19:56 +00:00
MachineCodeEmitter.cpp	Add #include <iostream> since Value.h does not #include it any more.	2004-07-04 12:19:56 +00:00
MachineCodeForInstruction.cpp	Do not find these ugly sparc-specific objects by using the annotation API on	2004-06-27 18:52:17 +00:00
MachineFunction.cpp	Add viewCFG() and viewCFGOnly() APIs.	2004-07-08 00:47:58 +00:00
MachineInstr.cpp	* Doxygenify comments	2004-07-09 14:45:17 +00:00
MachineInstrAnnot.cpp
Makefile	Making an archive version of the CodeGen library is unnecessary if we just	2004-06-22 17:52:30 +00:00
Passes.cpp	The default has not been 'simple' for AGES!	2004-07-22 21:46:02 +00:00
PHIElimination.cpp	costmetic changes	2004-07-22 23:05:12 +00:00
PhysRegTracker.h
PrologEpilogInserter.cpp	Fix fallout from getOffsetOfLocalArea() being negated. Debugging dumps were being	2004-06-11 06:37:11 +00:00
RegAllocIterativeScan.cpp	Use reverse iterators when updating the vector, since scanning from	2004-07-22 02:16:53 +00:00
RegAllocLinearScan.cpp	Some compile time improvements resulting in a 1sec speedup in the 5sec	2004-07-22 08:14:44 +00:00
RegAllocLocal.cpp	These files don't need to include <iostream> since they include "Support/Debug.h".	2004-07-21 20:50:33 +00:00
RegAllocSimple.cpp	These files don't need to include <iostream> since they include "Support/Debug.h".	2004-07-21 20:50:33 +00:00
TwoAddressInstructionPass.cpp	Fix indentation and wrap code at 80 cols	2004-07-22 15:26:23 +00:00
UnreachableBlockElim.cpp	Fix a bug in the unreachable block elim pass. Dropping all references on a	2004-07-06 06:36:11 +00:00
VirtRegMap.cpp	These files don't need to include <iostream> since they include "Support/Debug.h".	2004-07-21 20:50:33 +00:00
VirtRegMap.h	Add function to clear all virtual->physical mappings but not assigned	2004-07-20 13:28:17 +00:00