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LLVM backend for 6502
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Andrew Trick fb62b8deb3 Reapplying r136844. 
An algorithm for incrementally updating LoopInfo within a
LoopPassManager. The incremental update should be extremely cheap in
most cases and can be used in places where it's not feasible to
regenerate the entire loop forest.

- "Unloop" is a node in the loop tree whose last backedge has been removed.
- Perform reverse dataflow on the block inside Unloop to propagate the
  nearest loop from the block's successors.
- For reducible CFG, each block in unloop is visited exactly
  once. This is because unloop no longer has a backedge and blocks
  within subloops don't change parents.
- Immediate subloops are summarized by the nearest loop reachable from
  their exits or exits within nested subloops.
- At completion the unloop blocks each have a new parent loop, and
  each immediate subloop has a new parent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137276 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-10 23:22:57 +00:00
autoconf Update the default bug report url in autoconf. 2011-08-02 20:53:43 +00:00
bindings Remove the build_unwind function from the OCaml bindings. 2011-08-10 01:10:17 +00:00
cmake Remove yet another buried and hidden implicit dependency: every single 2011-07-30 08:47:05 +00:00
docs Changes per Jeffrey's comments. 2011-08-10 20:17:43 +00:00
examples Convert ConstantExpr::getGetElementPtr and 2011-07-21 14:31:17 +00:00
include Reapplying r136844. 2011-08-10 23:22:57 +00:00
lib Reapplying r136844. 2011-08-10 23:22:57 +00:00
projects Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
runtime Use version 402 for the GCDA files when compiling for Apple. 2011-07-28 18:12:20 +00:00
test ARM tests for LDRSHT assembly parsing and encoding. 2011-08-10 23:18:30 +00:00
tools Add MCInstrAnalysis class. This allows the targets to specify own versions of MCInstrDescs functions. 2011-08-08 18:56:44 +00:00
unittests Avoid undefined behaviour if somehow NUM_GRAPHS equals 2^32 (or 2011-07-29 07:50:02 +00:00
utils Make Record Name an Init 2011-08-10 18:27:46 +00:00
website
.gitignore Ignore Vim swap files 2011-05-31 21:54:28 +00:00
build-for-llvm-top.sh
CMakeLists.txt Added the infrastructute necessary for MIPS JIT support. Patch by Vladimir 2011-07-21 16:28:51 +00:00
configure Combine all MC initialization routines into one. e.g. InitializeX86MCAsmInfo, 2011-07-22 21:58:54 +00:00
CREDITS.TXT I am the code owner for Clang's IR generation; this has been true 2011-08-02 01:38:19 +00:00
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 TableGen'erated MC lowering for simple pseudo-instructions. 2011-07-08 17:36:35 +00:00
ModuleInfo.txt Remove trailing space. This is just an excuse to poke the 2010-10-05 20:32:15 +00:00
README.txt reverting test commit 2011-05-12 17:38:08 +00:00

README.txt 

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

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