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LLVM backend for 6502
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Jakob Stoklund Olesen 34c6f98034 Add experimental support for register unit liveness. 
Instead of computing a live interval per physreg, LiveIntervals can
compute live intervals per register unit. This makes impossible the
confusing situation where aliasing registers could have overlapping live
intervals. It should also make fixed interferernce checking cheaper
since registers have fewer register units than aliases.

Live intervals for regunits are computed on demand, using MRI use-def
chains and the new LiveRangeCalc class. Only regunits live in to ABI
blocks are precomputed during LiveIntervals::runOnMachineFunction().

The regunit liveness computations don't depend on LiveVariables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158029 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-05 22:02:15 +00:00
autoconf Remove the PTX back-end and all of its artifacts (triple, etc.) 2012-05-24 21:38:21 +00:00
bindings
cmake Fix how CMake appends -m32 to linker command-lines 2012-05-23 18:42:02 +00:00
docs Add 3.0 and 3.1 tags to the getting started guide. 2012-06-05 20:35:50 +00:00
examples Fix typos found by http://github.com/lyda/misspell-check 2012-06-02 10:20:22 +00:00
include Add experimental support for register unit liveness. 2012-06-05 22:02:15 +00:00
lib Add experimental support for register unit liveness. 2012-06-05 22:02:15 +00:00
projects Remove the PTX back-end and all of its artifacts (triple, etc.) 2012-05-24 21:38:21 +00:00
runtime Small code cleanup. No functionality change. 2012-05-25 21:57:59 +00:00
test Revert commit r157966 2012-06-05 00:47:21 +00:00
tools Reinstate -O3 for LTO. 2012-05-30 18:42:51 +00:00
unittests IntegersSubsetMapping: added exclude operation, that allows to exclude subset of integers from current mapping. 2012-06-05 07:57:36 +00:00
utils misched: Added MultiIssueItineraries. 2012-06-05 03:44:40 +00:00
.gitignore
CMakeLists.txt Remove the PTX back-end and all of its artifacts (triple, etc.) 2012-05-24 21:38:21 +00:00
configure Remove the PTX back-end and all of its artifacts (triple, etc.) 2012-05-24 21:38:21 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in
Makefile.rules llvm-ld does not exist anymore, use llvm-link instead. 2012-05-23 20:34:19 +00:00
README.txt Testing commit access 2012-05-24 14:20:13 +00:00

README.txt 

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

This directory and its subdirectories contain source code for the Low Level
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

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Please see the HTML documentation provided in docs/index.html for further
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