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Rafael Espindola 03d2823e02 Add support for comdats to the gold plugin. 
There are two parts to this. First, the plugin needs to tell gold the comdat by
setting comdat_key.

What gets things a bit more complicated is that gold only seems
symbols. In particular, if A is an alias to B, it only sees the symbols
A and B. It can then ask us to keep symbol A but drop symbol B. What
we have to do instead is to create an internal version of B and make A
an alias to that.

At some point some of this logic should be moved to lib/Linker so that
we don't map a Constant to an internal version just to have lib/Linker
map that again to the destination module.

The reason for implementing this in tools/gold for now is simplicity.
With it in place it should be possible to update clang to use comdats
for constructors and destructors on ELF without breaking the LTO
bootstrap. Once that is done I intend to come back and improve the
interface lib/Linker exposes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216302 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-22 23:26:10 +00:00
autoconf Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
bindings [OCaml] Expose Llvm.get_operand_use. 2014-08-12 02:55:45 +00:00
cmake Disabling an MSVC warning ('var' : definition from the for loop is ignored; the definition from the enclosing scope is used) which will trigger false positives more than true positives. 2014-08-18 14:54:22 +00:00
docs Clear the llvm release notes to make room for 3.6. 2014-08-22 21:57:38 +00:00
examples Make it explicit that ExecutionEngine takes ownership of the modules. 2014-08-19 04:04:25 +00:00
include ARM / x86_64 varargs: Don't save regparms in prologue without va_start 2014-08-22 21:59:26 +00:00
lib llvm-cov: add code coverage tool that's based on coverage mapping format and clang's pgo. 2014-08-22 22:56:03 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test Add support for comdats to the gold plugin. 2014-08-22 23:26:10 +00:00
tools Add support for comdats to the gold plugin. 2014-08-22 23:26:10 +00:00
unittests Fix PR17239 by changing the semantics of the RemainingArgsClass Option kind 2014-08-22 19:29:17 +00:00
utils Explicitly pass ownership of the MemoryBuffer to AddNewSourceBuffer using std::unique_ptr 2014-08-21 20:44:56 +00:00
.arcconfig
.clang-format
.gitignore
CMakeLists.txt Fix building with in-tree libc++abi on FreeBSD 2014-08-01 19:23:15 +00:00
CODE_OWNERS.TXT Add a sentence that all entries should include an email address. 2014-08-04 19:33:25 +00:00
configure Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
CREDITS.TXT add self to credits 2014-08-21 04:27:11 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in
Makefile.rules Delete support for AuroraUX. 2014-08-14 15:15:09 +00:00
README.txt

README.txt 

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