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Andrew Trick 8dd26253f5 RegAlloc superpass: includes phi elimination, coalescing, and scheduling. 
Creates a configurable regalloc pipeline.

Ensure specific llc options do what they say and nothing more: -reglloc=... has no effect other than selecting the allocator pass itself. This patch introduces a new umbrella flag, "-optimize-regalloc", to enable/disable the optimizing regalloc "superpass". This allows for example testing coalscing and scheduling under -O0 or vice-versa.

When a CodeGen pass requires the MachineFunction to have a particular property, we need to explicitly define that property so it can be directly queried rather than naming a specific Pass. For example, to check for SSA, use MRI->isSSA, not addRequired<PHIElimination>.

CodeGen transformation passes are never "required" as an analysis

ProcessImplicitDefs does not require LiveVariables.

We have a plan to massively simplify some of the early passes within the regalloc superpass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150226 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-10 04:10:36 +00:00
autoconf autoconf: put generated clang files in build dir 2012-02-04 03:00:50 +00:00
bindings ocaml bindings: landing pad is now the last opcode. 2012-02-07 18:58:19 +00:00
cmake CMake: Add the folder "Tablegenning" on llvm-tblgen targets. 2012-01-30 03:01:03 +00:00
docs Now subprogram descriptors are not collected by llvm.dbg.sp NamedMDNode. Update document to reflect this change. 2012-02-09 17:34:01 +00:00
examples Update ExceptionDemo to use ConstantDataArray. 2012-02-06 14:09:13 +00:00
include RegAlloc superpass: includes phi elimination, coalescing, and scheduling. 2012-02-10 04:10:36 +00:00
lib RegAlloc superpass: includes phi elimination, coalescing, and scheduling. 2012-02-10 04:10:36 +00:00
projects Replace the old --with-cxx-* configure options with a single --with-gcc-toolchain 2012-02-03 00:59:30 +00:00
runtime Fixing a warning in MSVC (this is also a test commit) 2012-02-05 19:43:39 +00:00
test RegAlloc superpass: includes phi elimination, coalescing, and scheduling. 2012-02-10 04:10:36 +00:00
tools RegAlloc superpass: includes phi elimination, coalescing, and scheduling. 2012-02-10 04:10:36 +00:00
unittests Add a unittest for rotating a really big APInt. 2012-02-07 16:27:39 +00:00
utils Store just the SimpleValueType in the generated VT tables for each register class, eliminating static ctors. 2012-02-09 12:35:37 +00:00
.gitignore git: Add tools/lldb to the ignore list. 2011-11-10 22:55:50 +00:00
CMakeLists.txt cmake: update outdated CPack version info 2012-02-04 02:52:48 +00:00
configure autoconf: put generated clang files in build dir 2012-02-04 03:00:50 +00:00
CREDITS.TXT CREDITS.TXT: Add a line. (test commit) 2011-10-29 23:42:14 +00:00
LICENSE.TXT Happy new year 2012! 2012-01-01 08:16:56 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt LLVMBuild: Introduce a common section which currently has a list of the 2011-12-12 22:45:54 +00:00
Makefile Makefile: add missing files to FilesToConfig 2012-01-17 02:56:49 +00:00
Makefile.common Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
Makefile.config.in capitalize project name, reference bugzilla 2011-12-18 18:50:16 +00:00
Makefile.rules build/make: Ensure make clean removes the LLVMBuild makefile fragment. 2012-02-02 23:27:34 +00:00
README.txt test commit 2012-02-07 08:18:05 +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.