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Davide Italiano 7937292912 [LTO] Fix the interaction between linker redefined symbols and ThinLTO 
This is the same as r304719 but for ThinLTO.
The substantial difference is that in this case we don't have
whole visibility, just the summary.
In the LTO case, when we got the resolution for the input file we
could just see if the linker told us whether a symbol was linker
redefined (using --wrap or --defsym) and switch the linkage directly
for the GV.

Here, we have the summary. So, we record that the linkage changed
from <whatever it was> to $weakany to prevent IPOs across this symbol
boundaries and actually just switch the linkage at FunctionImport time.

This patch should also fixes the lld bits (as all the scaffolding for
communicating if a symbol is linker redefined should be there & should
be the same), but I'll make sure to add some tests there as well.

Fixes PR33192.

Differential Revision:  https://reviews.llvm.org/D35064

llvm-svn: 307303
2017-07-06 19:58:26 +00:00
bindings [NFC] Remove multiple semicolons 2017-06-28 23:15:16 +00:00
cmake CMake: Add LLVM_UTILS_INSTALL_DIR option 2017-07-05 12:57:30 +00:00
docs remove an unused empty file. 2017-07-06 19:06:13 +00:00
examples [Orc] Remove the memory manager argument to addModule, and de-templatize the 2017-07-04 04:42:30 +00:00
include [GISel]: Enhance the MachineIRBuilder API 2017-07-06 19:40:07 +00:00
lib [LTO] Fix the interaction between linker redefined symbols and ThinLTO 2017-07-06 19:58:26 +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][runtimes] Add install target for runtimes builtins 2017-06-02 19:38:11 +00:00
test [LTO] Fix the interaction between linker redefined symbols and ThinLTO 2017-07-06 19:58:26 +00:00
tools Prototype: Reduce llvm-profdata merge memory usage further 2017-07-06 19:00:12 +00:00
unittests Prototype: Reduce llvm-profdata merge memory usage further 2017-07-06 19:00:12 +00:00
utils [opt-viewer] Move under tools, install it 2017-07-06 17:51:15 +00:00
.arcconfig
.clang-format
.clang-tidy
.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
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt
RELEASE_TESTERS.TXT

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