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LLVM backend for 6502
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Jakob Stoklund Olesen 07a267faec Set sub-register <undef> flags more accurately. 
When widening an existing <def,reads-undef> operand to a super-register,
it may be necessary to clear the <undef> flag because the wider register
is now read-modify-write through the instruction.

Conversely, it may be necessary to add an <undef> flag when the
coalescer turns a full-register def into a sub-register def, but the
larger register wasn't live before the instruction.

This happens in test/CodeGen/ARM/coalesce-subregs.ll, but the test
is too small for the <undef> flags to affect the generated code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156951 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-16 21:22:35 +00:00
autoconf Revert r156393, "[tests] Remove some remaining DejaGNU related cruft.", this 2012-05-08 18:26:07 +00:00
bindings [python] Add negative MemoryBuffer testcase 2012-03-22 11:23:52 +00:00
cmake Adding -fcolor-diagnostics is causing problem to users that parse the build 2012-05-08 18:11:06 +00:00
docs Fixed grammar for the llvm.trap intrinsic description. 2012-05-16 00:26:51 +00:00
examples Remove llvm-ld and llvm-stub (which is only used by llvm-ld). 2012-04-19 19:27:54 +00:00
include I noticed that named metadata doesn't provide a direct way of getting at the 2012-05-16 12:25:43 +00:00
lib Set sub-register <undef> flags more accurately. 2012-05-16 21:22:35 +00:00
projects Update all outdated autoconf files in the sample project. 2012-05-05 15:02:39 +00:00
runtime Switch to c-style comments in a C file. 2012-04-27 19:30:29 +00:00
test Teach the 'opt' tool about '-Os' and '-Oz', corresponding to the Clang 2012-05-16 08:32:49 +00:00
tools Added LLIMCJITMemoryManager to the lli. This manager will be used for MCJIT instead of DefaultJIMMemoryManager. 2012-05-16 18:50:11 +00:00
unittests Disable JITTest.FunctionIsRecompiledAndRelinked and JITTest.NoStubs 2012-05-16 19:07:55 +00:00
utils Significantly reduce the compiled size of Functions.cpp by turning a big blob of tblgen 2012-05-16 06:34:44 +00:00
.gitignore Add tools/lld to .gitignore. 2012-05-02 21:25:32 +00:00
CMakeLists.txt Make it possible to switch off solution folders. VS Express does not support 2012-05-09 15:10:54 +00:00
configure Revert r156393, "[tests] Remove some remaining DejaGNU related cruft.", this 2012-05-08 18:26:07 +00:00
CREDITS.TXT Update the documentation of CellSPU, in case it gets removed in 3.1. 2012-04-29 20:00:55 +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
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 Make IntelJITEvents and OProfileJIT as optional libraries and add 2012-05-07 19:38:40 +00:00
Makefile.rules Make IntelJITEvents and OProfileJIT as optional libraries and add 2012-05-07 19:38:40 +00:00
README.txt test commit 2012-03-20 13:12:38 +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.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

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

If you're writing a package for LLVM, see docs/Packaging.html for our
suggestions.