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4d32e85359
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Chandler Carruth 4d32e85359 [PM] Switch the downward invalidation to be incremental where only the 
one function's analyses are invalidated at a time. Also switch the
preservation of the proxy to *fully* preserve the lower (function)
analyses.

Combined, this gets both upward and downward analysis invalidation to
a point I'm happy with:

- A function pass invalidates its function analyses, and its parent's
  module analyses.
- A module pass invalidates all of its functions' analyses including the
  set of which functions are in the module.
- A function pass can preserve a module analysis pass.
- If all function passes preserve a module analysis pass, that
  preservation persists. If any doesn't the module analysis is
  invalidated.
- A module pass can opt into managing *all* function analysis
  invalidation itself or *none*.
- The conservative default is none, and the proxy takes the maximally
  conservative approach that works even if the set of functions has
  changed.
- If a module pass opts into managing function analysis invalidation it
  has to propagate the invalidation itself, the proxy just does nothing.

The only thing really missing is a way to query for a cached analysis or
nothing at all. With this, function passes can more safely request
a cached module analysis pass without fear of it accidentally running
part way through.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195519 91177308-0d34-0410-b5e6-96231b3b80d8
2013-11-22 23:38:07 +00:00
autoconf Update to reflect the next release. 2013-11-20 10:10:50 +00:00
bindings [OCaml] Unbreak make install by providing ocamldoc target 2013-11-21 10:10:16 +00:00
cmake Revert my CMake patches concerning building with /MT (r194589, r194596) 2013-11-13 20:29:10 +00:00
docs Remove dangling documentation. llvm-prof was deleted a while ago. 2013-11-21 19:32:37 +00:00
examples [weak vtables] Place class definitions into anonymous namespaces to prevent weak vtables. 2013-11-19 03:08:35 +00:00
include [PM] Switch the downward invalidation to be incremental where only the 2013-11-22 23:38:07 +00:00
lib [PM] Switch the downward invalidation to be incremental where only the 2013-11-22 23:38:07 +00:00
projects Revert "Revert "Windows: Add support for unicode command lines"" 2013-10-07 01:00:07 +00:00
test R600/SI: Fixing handling of condition codes 2013-11-22 23:07:58 +00:00
tools VS integration: use the correct registry key after r195379 2013-11-22 18:25:43 +00:00
unittests [PM] Switch the downward invalidation to be incremental where only the 2013-11-22 23:38:07 +00:00
utils FileCheck: fix a bug with multiple --check-prefix options. Similar to r194565 2013-11-20 13:25:05 +00:00
.arcconfig Add .arcconfig to the repository. Useful if someone wants to use phabricator's command line tool. 2012-12-01 12:07:58 +00:00
.clang-format Add a clang-format file so that the tool can automatically detect the 2013-09-02 07:19:04 +00:00
.gitignore Add extra vim swap file pattern 2012-10-09 23:48:34 +00:00
CMakeLists.txt CMake: Some changes to package version names: 2013-11-21 22:47:21 +00:00
CODE_OWNERS.TXT Add loop rerolling code owner 2013-11-20 20:54:33 +00:00
configure Update to reflect the next release. 2013-11-20 10:10:50 +00:00
CREDITS.TXT Update CREDITS 2013-11-17 11:44:36 +00:00
LICENSE.TXT Be more specific and capitalize filenames. 2013-05-21 21:22:34 +00:00
llvm.spec.in Tidy up. s/Low Level Virtual Machine/LLVM/. 2012-01-25 22:00:23 +00:00
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile.common Makefile.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
Makefile.config.in Add an autoconf option for turning on -gsplit-dwarf by default 2013-06-25 01:12:25 +00:00
Makefile.rules Teach the Makefile build system how to handle SOURCES which include 2013-11-14 23:51:29 +00:00
README.txt Revert "Test commit to check e-mail address. Please discard this." 2013-10-04 10:59:13 +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 documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.