Add llvm-cbe project (#37)

Checks out alexanderkyte/llvm-cbe@1b83c7f

projects/llvm-cbe/.gitignore

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+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app

projects/llvm-cbe/CMakeLists.txt

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+add_subdirectory(lib)
+add_subdirectory(tools)

projects/llvm-cbe/LICENSE

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+==============================================================================
+LLVM Release License
+==============================================================================
+University of Illinois/NCSA
+Open Source License
+Copyright (c) 2003-2014 University of Illinois at Urbana-Champaign.
+All rights reserved.
+Developed by:
+LLVM Team
+University of Illinois at Urbana-Champaign
+http://llvm.org
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal with
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+* Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimers.
+* Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimers in the
+documentation and/or other materials provided with the distribution.
+* Neither the names of the LLVM Team, University of Illinois at
+Urbana-Champaign, nor the names of its contributors may be used to
+endorse or promote products derived from this Software without specific
+prior written permission.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
+SOFTWARE.
+==============================================================================
+Copyrights and Licenses for Third Party Software Distributed with LLVM:
+==============================================================================
+The LLVM software contains code written by third parties. Such software will
+have its own individual LICENSE.TXT file in the directory in which it appears.
+This file will describe the copyrights, license, and restrictions which apply
+to that code.
+The disclaimer of warranty in the University of Illinois Open Source License
+applies to all code in the LLVM Distribution, and nothing in any of the
+other licenses gives permission to use the names of the LLVM Team or the
+University of Illinois to endorse or promote products derived from this
+Software.
+The following pieces of software have additional or alternate copyrights,
+licenses, and/or restrictions:
+Program Directory
+------- ---------
+Autoconf llvm/autoconf
+llvm/projects/ModuleMaker/autoconf
+llvm/projects/sample/autoconf
+Google Test llvm/utils/unittest/googletest
+OpenBSD regex llvm/lib/Support/{reg*, COPYRIGHT.regex}
+pyyaml tests llvm/test/YAMLParser/{*.data, LICENSE.TXT}
+ARM contributions llvm/lib/Target/ARM/LICENSE.TXT
+md5 contributions llvm/lib/Support/MD5.cpp llvm/include/llvm/Support/MD5.h

projects/llvm-cbe/Makefile

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+##===- projects/sample/lib/Makefile ------------------------*- Makefile -*-===##
+
+#
+# Relative path to the top of the source tree.
+#
+LEVEL := ../..
+include $(LEVEL)/Makefile.config
+
+#
+# List all of the subdirectories that we will compile.
+#
+DIRS := lib tools
+
+include $(PROJ_SRC_ROOT)/Makefile.rules

projects/llvm-cbe/README.md

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+llvm-cbe
+========
+
+resurrected LLVM "C Backend", with improvements
+
+
+INSTALLATION INSTRUCTIONS
+=========================
+
+This version of the LLVM-CBE library works with LLVM 6.0 and 7.0. You will have
+to compile this version of LLVM before you try to use LLVM-CBE. This
+guide will walk you through the compilation and installation of both
+tools and show usage statements to verify that the LLVM-CBE library is
+compiled correctly.
+
+The library is known to compile on various Linux versions (Redhat,
+Mageia, Ubuntu, Debian), Mac OS X, and Windows (Mingw-w64).
+
+Step 1: Installing LLVM
+=======================
+
+LLVM-CBE relies on specific LLVM internals, and so it is best to use
+it with a specific revision of the LLVM development tree. Currently,
+llvm-cbe works with the LLVM 6.0 and 7.0 release versions and autotools.
+
+Note: to convert C to LLVM IR to run the tests, you will also need a C compiler such as clang.
+
+The first step is to compile LLVM on your machine
+(this assumes an in-tree build, but out-of-tree will also work):
+
+     cd $HOME
+     git clone https://github.com/llvm-mirror/llvm
+     cd llvm
+     git checkout release_37
+     mkdir build
+     cd build
+     ../configure
+     make
+
+Step 2: Compiling LLVM-CBE
+==========================
+
+Next, download and compile llvm-cbe from the same folder:
+
+    cd $HOME/llvm/projects
+    git clone https://github.com/JuliaComputing/llvm-cbe
+    cd ../build
+    make
+
+Step 3: Usage Examples
+======================
+
+If llvm-cbe compiles, you should be able to run it with the following commands.
+```
+$ cd $HOME/llvm/projects/llvm-cbe/test/selectionsort
+$ ls
+main.c
+$ clang -S -emit-llvm main.c
+$ ls
+main.c main.ll
+$ $(HOME)/llvm/build/Debug+Asserts/bin/llvm-cbe main.ll
+```
+
+Compile Generated C-Code and Run
+================================
+
+```
+$ gcc -o main.cbe main.cbe.c
+$ ls
+main.c  main.cbe  main.cbe.c  main.ll
+$ ./main.cbe
+```

projects/llvm-cbe/docs/index.html

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+<html>
+  <body>
+    <h1>SAMPLE PROJECT DOCUMENTATION</h1>
+    <p>This is just a placeholder</p>
+  </body>
+</html>

projects/llvm-cbe/include/sample.h

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+/*
+ * File: sample.h
+ *
+ *      This is a sample header file that is global to the entire project.
+ *      It is located here so that everyone will find it.
+ */
+extern int compute_sample (int a);
+

projects/llvm-cbe/lib/CMakeLists.txt

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+add_subdirectory(Target)

projects/llvm-cbe/lib/Makefile

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+##===- projects/sample/lib/Makefile ------------------------*- Makefile -*-===##
+
+#
+# Relative path to the top of the source tree.
+#
+LEVEL := ../../..
+include $(LEVEL)/Makefile.config
+
+#
+# List all of the subdirectories that we will compile.
+#
+DIRS := Target
+
+include $(PROJ_SRC_ROOT)/Makefile.rules