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
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Analysis	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
Archive	Changes For Bug 352	2004-09-01 22:55:40 +00:00
AsmParser	Okay, the list of link-time passes wasn't such a hot idea. Its prone to	2004-09-14 05:43:23 +00:00
Bytecode	Fix doxygen comment	2004-09-28 16:57:46 +00:00
CodeGen	Substantially revamp the local spiller, causing it to actually improve the	2004-10-01 19:04:51 +00:00
Debugger	Changes For Bug 352	2004-09-01 22:55:40 +00:00
ExecutionEngine	Convert code to compile with vc7.1.	2004-09-15 17:06:42 +00:00
Linker	Implement support for dependent libraries. The "source" module's dependent	2004-09-11 04:25:17 +00:00
Support	Add includes and use std:: for standard library calls to make code	2004-09-28 14:42:44 +00:00
System	That should actually be __MING, not __MINGW.	2004-09-30 18:28:07 +00:00
Target	Make EmitMappingInfo into an "external location" option, so that it can be set	2004-09-30 20:20:01 +00:00
Transforms	Add accessor function.	2004-09-30 20:14:29 +00:00
VMCore	Make sure to check select instructions for generic instruction properties	2004-09-29 21:19:28 +00:00
Makefile	Wrap long line	2004-09-15 01:34:42 +00:00