Chris Lattner 7fb64347d7 Substantially revamp the local spiller, causing it to actually improve the ... generated code over the simple spiller. The new local spiller generates substantially better code than the simple one in some cases, by reusing values that are loaded out of stack slots and kept available in registers. This primarily helps programs that are spilling a lot, and there is still stuff that can be done to improve it. This patch makes the local spiller the default, as it's only a tiny bit slower than the simple spiller (it increases the runtime of llc by < 1%). Here are some numbers with speedups. Program #reuse old(s) new(s) Speedup Povray: 3452, 16.87 -> 15.93 (5.5%) 177.mesa: 2176, 2.77 -> 2.76 (0%) 179.art: 35, 28.43 -> 28.01 (1.5%) 183.equake: 55, 61.44 -> 61.41 (0%) 188.ammp: 869, 174 -> 149 (15%) 164.gzip: 43, 40.73 -> 40.71 (0%) 175.vpr: 351, 18.54 -> 17.34 (6.5%) 176.gcc: 2471, 5.01 -> 4.92 (1.8%) 181.mcf 42, 79.30 -> 75.20 (5.2%) 186.crafty: 484, 29.73 -> 30.04 (-1%) 197.parser: 251, 10.47 -> 10.67 (-1%) 252.eon: 1501, 1.98 -> 1.75 (12%) 253.perlbm: 1183, 14.83 -> 14.42 (2.8%) 254.gap: 825, 7.46 -> 7.29 (2.3%) 255.vortex: 285, 10.51 -> 10.27 (2.3%) 256.bzip2: 63, 55.70 -> 55.20 (0.9%) 300.twolf: 830, 21.63 -> 22.00 (-1%) PtrDist/ks 14, 32.75 -> 17.53 (46.5%) Olden/tsp 46, 8.71 -> 8.24 (5.4%) Free/distray 70, 1.09 -> 0.99 (9.2%) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16629 91177308-0d34-0410-b5e6-96231b3b80d8		2004-10-01 19:04:51 +00:00
..
InstrSched	Add includes and use std:: for standard library calls to make code	2004-09-28 14:42:44 +00:00
ModuloScheduling	Add includes and use std:: for standard library calls to make code	2004-09-28 14:42:44 +00:00
SelectionDAG	Add #include <iostream> since Value.h does not #include it any more.	2004-07-04 12:19:56 +00:00
AsmPrinter.cpp	Do not use .xword and friends to emit zeros on V9. Apparently there are issues	2004-08-24 00:26:11 +00:00
BranchFolding.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
IntrinsicLowering.cpp	Fix #includes of i*.h => Instructions.h as per PR403.	2004-07-29 17:30:56 +00:00
LiveInterval.cpp	Fix includes. Patch contributed by Paolo Invernizzi!	2004-09-28 02:38:58 +00:00
LiveInterval.h	Make a method const, no functionality changes	2004-07-25 06:23:01 +00:00
LiveIntervalAnalysis.cpp	Pretty print a bit nicer :)	2004-10-01 19:01:39 +00:00
LiveIntervalAnalysis.h	* Wrap some comments to 80 cols	2004-09-30 15:59:17 +00:00
LiveVariables.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
MachineBasicBlock.cpp	Indent to 2 spaces.	2004-09-05 18:39:20 +00:00
MachineCodeEmitter.cpp	Add #include <iostream> since Value.h does not #include it any more.	2004-07-04 12:19:56 +00:00
MachineFunction.cpp	Indent to 2 spaces and cleanup excess whitespace.	2004-09-05 18:41:35 +00:00
MachineInstr.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
Makefile	Adding ModuloScheduling so that it compiles for everyone.	2004-08-01 19:00:17 +00:00
Passes.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
PHIElimination.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
PhysRegTracker.h	Improved PhysRegTracker interface. RegAlloc lazily allocates the register tracker using a std::auto_ptr	2004-02-23 06:10:13 +00:00
PrologEpilogInserter.cpp	Put this change back in after testing from Reid proved its innocence. getSpillSize now returns value in bits	2004-08-29 22:00:24 +00:00
RegAllocIterativeScan.cpp	Change the way we choose a free register: instead of picking the first	2004-09-02 21:24:33 +00:00
RegAllocLinearScan.cpp	Free the VirtRegMap at the end of MachineFunction processing instead of at	2004-09-30 02:02:33 +00:00
RegAllocLocal.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
RegAllocSimple.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
TwoAddressInstructionPass.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
UnreachableBlockElim.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
VirtRegMap.cpp	Substantially revamp the local spiller, causing it to actually improve the	2004-10-01 19:04:51 +00:00
VirtRegMap.h	Document this class a bit :-)	2004-10-01 00:35:07 +00:00