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LLVM backend for 6502
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Jakob Stoklund Olesen 4d517e34e5 Rewrite RAGreedy::splitAroundRegion, now with cool ASCII art. 
This function has to deal with a lot of special cases, and the old
version got it wrong sometimes. In particular, it would sometimes leave
multiple uses in the stack interval in a single block. That causes bad
code with multiple reloads in the same basic block.

The new version handles block entry and exit in a single pass. It first
eliminates all the easy cases, and then goes on to create a local
interval for the blocks with difficult interference. Previously, we
would only create the local interval for completely isolated blocks.

It can happen that the stack interval becomes completely empty because
we could allocate a register in all edge bundles, and the new local
intervals deal with the interference. The empty stack interval is
harmless, but we need to remove a SplitKit assertion that checks for
empty intervals.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134047 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-29 00:24:24 +00:00
autoconf build/configure: Add support for --with-extra-ld-options flag (to provide extra 2011-06-16 22:30:38 +00:00
bindings
cmake Update CMake library dependencies. 2011-06-25 02:10:19 +00:00
docs Document nonlazybind. 2011-06-16 16:03:13 +00:00
examples Modify comment. 2011-06-09 20:11:46 +00:00
include Unbreak every backend. 2011-06-28 21:33:11 +00:00
lib Rewrite RAGreedy::splitAroundRegion, now with cool ASCII art. 2011-06-29 00:24:24 +00:00
projects
runtime Fix build for (some versions of?) MinGW. Patch by Ruben Van Boxem. 2011-06-23 18:24:27 +00:00
test Fix a CMake warning, following up to r134008. 2011-06-28 21:46:21 +00:00
tools Reinstate r133516 "Remove some unnecessary uses of c_str()." A trailing null 2011-06-28 18:26:12 +00:00
unittests Fix the implementation of ConstantRange::sub(ConstantRange). Patch by Xi Wang! 2011-06-22 21:13:46 +00:00
utils Move CallFrameSetupOpcode and CallFrameDestroyOpcode to TargetInstrInfo. 2011-06-28 21:14:33 +00:00
website
.gitignore Ignore Vim swap files 2011-05-31 21:54:28 +00:00
build-for-llvm-top.sh
CMakeLists.txt
configure Regenerate configure. 2011-06-16 22:30:41 +00:00
CREDITS.TXT
LICENSE.TXT Happy new year. 2011-06-12 15:26:54 +00:00
llvm.spec.in
Makefile Install libprofile_rt.dylib where it's more available for gcov support. 2011-06-10 21:47:14 +00:00
Makefile.common
Makefile.config.in build/configure: Add support for --with-extra-ld-options flag (to provide extra 2011-06-16 22:30:38 +00:00
Makefile.rules build/Darwin: Fix epic typo fail. 2011-06-28 22:30:17 +00:00
ModuleInfo.txt
README.txt

README.txt 

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