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Chandler Carruth b6378546b8 [PM/LCG] Follow-up fix to r308088 to handle deletion of library 
functions.

In the prior commit, we provide ordering to the LCG between functions
and library function definitions that they might begin to call through
transformations. But we still would delete these library functions from
the call graph if they became dead during inlining.

While this immediately crashed, it also exposed a loss of information.
We shouldn't remove definitions of library functions that can still
usefully participate in the LCG-powered CGSCC optimization process. If
new call edges are formed, we want to have definitions to be called.

We can still remove these functions if truly dead using global-dce, etc,
but removing them during the CGSCC walk is premature.

This fixes a crash in the new PM when optimizing some unusual libraries
that end up with "internal" lib functions such as the code in the "R"
language's libraries.

llvm-svn: 308417
2017-07-19 04:12:25 +00:00
bindings [NFC] Remove multiple semicolons 2017-06-28 23:15:16 +00:00
cmake [Solaris] Detect Solaris LD, use detection results to pass Solaris-ld options 2017-07-12 21:43:14 +00:00
docs fix typos in a document; NFC 2017-07-18 17:52:47 +00:00
examples fix typos in comments and error messges; NFC 2017-07-13 06:48:39 +00:00
include [PM/LCG] Follow-up fix to r308088 to handle deletion of library 2017-07-19 04:12:25 +00:00
lib [PM/LCG] Follow-up fix to r308088 to handle deletion of library 2017-07-19 04:12:25 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +00:00
resources
runtimes [CMake] Set toolchain tools in cross-target runtimes build 2017-07-18 20:54:02 +00:00
test [PM/LCG] Follow-up fix to r308088 to handle deletion of library 2017-07-19 04:12:25 +00:00
tools [llvm-readobj] Install llvm-readelf alias 2017-07-19 02:09:37 +00:00
unittests Debug Info: Add a file: field to DIImportedEntity. 2017-07-19 00:09:54 +00:00
utils [AArch64] Extend CallingConv::X86_64_Win64 to AArch64 as well 2017-07-17 20:05:19 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt CMake: Add LLVM_UTILS_INSTALL_DIR option 2017-07-05 12:57:30 +00:00
CODE_OWNERS.TXT Remove the BBVectorize pass. 2017-06-30 07:09:08 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT [RelTest] Diana is doing both releases now 2017-07-14 08:33:52 +00:00

README.txt 

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

This directory and its subdirectories contain source code for LLVM,
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 are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.