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LLVM backend for 6502
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C++ 48.7%
LLVM 38.5%
Assembly 10.2%
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b1b97833ae
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Andrew Trick b1b97833ae Preserve branch profile metadata during switch formation. 
Patch by Michael Ilseman!
This fixes SimplifyCFGOpt::FoldValueComparisonIntoPredecessors to preserve metata when folding conditional branches into switches.

void foo(int x) {
  if (x == 0)
    bar(1);
  else if (__builtin_expect(x == 10, 1))
    bar(2);
  else if (x == 20)
    bar(3);
}

CFG:

B0
|  \
|   X0
B10
|  \
|   X10
B20
|  \
E   X20

Merge B0-B10:
w(B0-X0) = w(B0-X0)*sum-weights(B10) = w(B0-X0) * (w(B10-X10) + w(B10-B20))
w(B0-X10) = w(B0-B10) * w(B10-X10)
w(B0-B20) = w(B0-B10) * w(B10-B20)

B0 __
| \  \
| X10 X0
B20
|  \
E  X20

Merge B0-B20:
w(B0-X0) = w(B0-X0) * sum-weights(B20) = w(B0-X0) * (w(B20-E) + w(B20-X20))
w(B0-X10) = w(B0-X10) * sum-weights(B20) = ...
w(B0-X20) = w(B0-B20) * w(B20-X20)
w(B0-E) = w(B0-B20) * w(B20-E)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162868 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-29 21:46:38 +00:00
autoconf Temporarily revert this to bring back the bots. 2012-08-28 01:17:46 +00:00
bindings Remove tabs. 2012-07-19 00:23:13 +00:00
cmake enable cross compilation with cmake 2012-08-20 19:56:52 +00:00
docs Patch by Sean Silva to un-barf his computer by explicitly removing the '\n' 2012-08-28 17:18:27 +00:00
examples
include Rename hasVolatileMemoryRef() to hasOrderedMemoryRef(). 2012-08-29 21:19:21 +00:00
lib Preserve branch profile metadata during switch formation. 2012-08-29 21:46:38 +00:00
projects Enable recursing into the compiler-rt projcet with the CMake build. 2012-08-29 00:38:02 +00:00
runtime libprofile: [CMake] Let libprofile_rt be not loadable_module but shared library. Autoconf's one does so. 2012-08-29 00:37:51 +00:00
test Reserve space for the mandatory traceback fields on PPC64. 2012-08-29 20:22:24 +00:00
tools LLI: move instruction cache tweaks. 2012-08-28 23:22:30 +00:00
unittests Don't pass a null pointer to cast<> in its unit tests. 2012-08-21 20:39:25 +00:00
utils Fix a nondeterminism in the ARM assembler. 2012-08-29 03:52:57 +00:00
.gitignore Ignore the documentation-suggested location for compile_commands.json 2012-08-21 19:23:30 +00:00
CMakeLists.txt enable cross compilation with cmake 2012-08-20 19:56:52 +00:00
CODE_OWNERS.TXT Add the list of code owners to the top level of the LLVM source tree to 2012-07-26 08:04:09 +00:00
configure Temporarily revert this to bring back the bots. 2012-08-28 01:17:46 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile darwin/cross-build: Unset SDKROOT when building BuildTools. 2012-08-22 22:01:01 +00:00
Makefile.common
Makefile.config.in Temporarily revert this to bring back the bots. 2012-08-28 01:17:46 +00:00
Makefile.rules Temporarily revert this to bring back the bots. 2012-08-28 01:17:46 +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
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.