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
..
Analysis	Clean up reference counting to stop "leaking" alias sets	2004-07-22 07:58:18 +00:00
Archive	Add #include <iostream> which is needed now that Value.h doesn't include it	2004-07-04 11:01:27 +00:00
AsmParser	bug 122:	2004-07-18 00:08:11 +00:00
Bytecode	bug 122:	2004-07-18 00:18:30 +00:00
CodeGen	Force coallescing of live ranges that have a single definition, even if they	2004-07-23 05:26:05 +00:00
Debugger	bug 122:	2004-07-18 00:44:37 +00:00
ExecutionEngine	bug 122:	2004-07-18 00:41:27 +00:00
Linker	bug 122:	2004-07-17 23:50:57 +00:00
Support	These files don't need to include <iostream> since they include "Support/Debug.h".	2004-07-21 20:50:33 +00:00
System	A description of what this library is about, reference to the documentation	2004-07-18 22:33:08 +00:00
Target	Bool alignment on MacOSX/PowerPC is 4 bytes.	2004-07-23 01:11:46 +00:00
Transforms	This is a trivial dead store elimination pass. It very very simple and	2004-07-22 08:00:28 +00:00
VMCore	Updates to gc intrinsics, contributed by Tobias Nurmiranta	2004-07-22 05:50:01 +00:00
Makefile	CBackend is no longer here	2004-02-13 23:29:37 +00:00