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LLVM backend for 6502
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Jakob Stoklund Olesen 40d07bbebb Add CoalescerPair helper class. 
Given a copy instruction, CoalescerPair can determine which registers to
coalesce in order to eliminate the copy. It deals with all the subreg fun to
determine a tuple (DstReg, SrcReg, SubIdx) such that:

- SrcReg is a virtual register that will disappear after coalescing.
- DstReg is a virtual or physical register whose live range will be extended.
- SubIdx is 0 when DstReg is a physical register.
- SrcReg can be joined with DstReg:SubIdx.

CoalescerPair::isCoalescable() determines if another copy instruction is
compatible with the same tuple. This fixes some NEON miscompilations where
shuffles are getting coalesced as if they were copies.

The CoalescerPair class will replace a lot of the spaghetti logic in JoinCopy
later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105997 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-15 16:04:21 +00:00
autoconf Fix a spello affecting platforms where the configure check fails. 2010-06-01 16:22:27 +00:00
bindings add attributes and module level asm to the ocaml bindings, 2010-04-10 17:52:58 +00:00
cmake Tell Valgrind when we modify already-executed machine code so it knows 2010-03-15 04:57:55 +00:00
docs Update html tutorial docs to match api changes. 2010-06-14 06:09:39 +00:00
examples Make kaleidoscope use fp add/sub/mul. 2010-06-14 06:03:16 +00:00
include Add CoalescerPair helper class. 2010-06-15 16:04:21 +00:00
lib Add CoalescerPair helper class. 2010-06-15 16:04:21 +00:00
projects
runtime Delete a blank line. 2010-04-16 13:32:55 +00:00
test Add CoalescerPair helper class. 2010-06-15 16:04:21 +00:00
tools Don't produce output only if *all* files are unused. 2010-06-14 21:20:52 +00:00
unittests ADT: Add DAGDeltaAlgorithm, which is a DAG minimization algorithm built on top of the standard 'delta debugging' algorithm. 2010-06-08 16:21:22 +00:00
utils generate better code in CheckComplexPattern 2010-06-14 22:33:34 +00:00
website
build-for-llvm-top.sh
CMakeLists.txt CMake: Add options for using static runtime on MSVC++ build. 2010-03-18 13:52:05 +00:00
configure Fix a spello affecting platforms where the configure check fails. 2010-06-01 16:22:27 +00:00
CREDITS.TXT Adding the MicroBlaze backend. 2010-02-23 19:15:24 +00:00
LICENSE.TXT
llvm.spec.in
Makefile Update for CIndex rename. 2010-04-30 23:36:47 +00:00
Makefile.common
Makefile.config.in Delete unused variables (that weren't even getting expanded). 2010-06-01 17:26:14 +00:00
Makefile.rules Makefiles: Teach LLVM's recursive makefile descent to update objdir Makefiles if 2010-06-08 20:10:13 +00:00
ModuleInfo.txt
README.txt Give packagers some advice about how to build LLVM so it's useful to 2010-02-26 00:54:42 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

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LLVM is open source software. You may freely distribute it under the terms of
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Please see the HTML documentation provided in docs/index.html for further
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