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LLVM backend for 6502
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Jakob Stoklund Olesen 84315f03cb Preserve 2-addr constraints in ConnectedVNInfoEqClasses. 
When a live range splits into multiple connected components, we would
arbitrarily assign <undef> uses to component 0. This is wrong when the
use is tied to a def that gets assigned to a different component:

  %vreg69<def> = ADD8ri %vreg68<undef>, 1

The use and def must get the same virtual register.

Fix this by assigning <undef> uses to the same component as the value
defined by the instruction, if any:

  %vreg69<def> = ADD8ri %vreg69<undef>, 1

This fixes PR13402. The PR has a test case which I am not including
because it is unlikely to keep exposing this behavior in the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160739 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-25 17:15:15 +00:00
autoconf Fix a typo (the the => the) 2012-07-23 08:51:15 +00:00
bindings Remove tabs. 2012-07-19 00:23:13 +00:00
cmake autoconf: Re-introduce LLVM_HOSTTRIPLE since r143500, as rework of PR11060. 2012-07-22 03:04:52 +00:00
docs Twine: fix link to source, add link to class doc and container section. 2012-07-25 13:46:11 +00:00
examples Move llvm/Support/IRBuilder.h -> llvm/IRBuilder.h 2012-06-29 12:38:19 +00:00
include make all Emit*() functions consult the TargetLibraryInfo information before creating a call to a library function. 2012-07-25 16:46:31 +00:00
lib Preserve 2-addr constraints in ConnectedVNInfoEqClasses. 2012-07-25 17:15:15 +00:00
projects Fix a typo (the the => the) 2012-07-23 08:51:15 +00:00
runtime Free the allocated filename. Found by clang static analyzer. 2012-06-15 09:11:47 +00:00
test When a return struct pointer is passed in registers, the called has nothing 2012-07-25 13:41:10 +00:00
tools Fix a typo (the the => the) 2012-07-23 08:51:15 +00:00
unittests make ConstantRange::zeroExtend() optimal 2012-07-23 20:33:29 +00:00
utils Fix a "Bad fd number" error on some platforms due to a less portable 2012-07-23 20:54:17 +00:00
.gitignore Add tools/lld to .gitignore. 2012-05-02 21:25:32 +00:00
CMakeLists.txt Revert "Build script changes for R600/SI Codegen v6" 2012-07-16 18:19:46 +00:00
configure autoconf: Re-introduce LLVM_HOSTTRIPLE since r143500, as rework of PR11060. 2012-07-22 03:04:52 +00:00
CREDITS.TXT Alphabetize. 2012-06-19 23:47:58 +00:00
LICENSE.TXT Add YAML parser to Support. 2012-04-03 23:09:22 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
Makefile Do not install llvm-config-host for cross-builds of clang. rdar://11317847 2012-05-09 00:07:02 +00:00
Makefile.common [docs] Remove unsupported references to ExtraSource variable. 2012-05-15 21:32:27 +00:00
Makefile.config.in Remove autoconf support for runtest and tclsh, some of the last vestigal 2012-06-27 23:53:41 +00:00
Makefile.rules Remove 'check-dg', a wrapper around 'check-local-dg' which was just 2012-06-28 00:03:13 +00:00
README.txt test commit 2012-07-11 17:34:12 +00:00

README.txt 

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

This directory and its subdirectories contain source code for the Low Level
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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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If you're writing a package for LLVM, see docs/Packaging.html for our
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