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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193915 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193914 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193846 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193810 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193804 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193802 91177308-0d34-0410-b5e6-96231b3b80d8
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There are two ways one could implement hiding of linkonce_odr symbols in LTO:
* LLVM tells the linker which symbols can be hidden if not used from native
files.
* The linker tells LLVM which symbols are not used from other object files,
but will be put in the dso symbol table if present.
GOLD's API is the second option. It was implemented almost 1:1 in llvm by
passing the list down to internalize.
LLVM already had partial support for the first option. It is also very similar
to how ld64 handles hiding these symbols when *not* doing LTO.
This patch then
* removes the APIs for the DSO list.
* marks LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN all linkonce_odr unnamed_addr
global values and other linkonce_odr whose address is not used.
* makes the gold plugin responsible for handling the API mismatch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193800 91177308-0d34-0410-b5e6-96231b3b80d8
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When a linkonce_odr value that is on the dso list is not unnamed_addr
we can still look to see if anything is actually using its address. If
not, it is safe to hide it.
This patch implements that by moving GlobalStatus to Transforms/Utils
and using it in Internalize.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193090 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192262 91177308-0d34-0410-b5e6-96231b3b80d8
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We were writing in text mode.
Patch by Greg Bedwell.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191985 91177308-0d34-0410-b5e6-96231b3b80d8
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Generalize the API so we can distinguish symbols that are needed just for a DSO
symbol table from those that are used from some native .o.
The symbols that are only wanted for the dso symbol table can be dropped if
llvm can prove every other dso has a copy (linkonce_odr) and the address is not
important (unnamed_addr).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191922 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191836 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191830 91177308-0d34-0410-b5e6-96231b3b80d8
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Patch by Tom Roeder.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191825 91177308-0d34-0410-b5e6-96231b3b80d8
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Enable building the LTO library (.lib and.dll) and llvm-lto.exe on Windows with
MSVC and Mingw as well as re-enabling the associated test.
Patch by Greg Bedwell!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191823 91177308-0d34-0410-b5e6-96231b3b80d8
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This reverts commit r191670.
It was causing build failures on the msvc bots:
http://bb.pgr.jp/builders/ninja-clang-i686-msc17-R/builds/5166/steps/compile/logs/stdio
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191679 91177308-0d34-0410-b5e6-96231b3b80d8
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Enable building the LTO library (.lib and.dll) and llvm-lto.exe on Windows with
MSVC and Mingw as well as re-enabling the associated test.
Patch by Greg Bedwell!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191670 91177308-0d34-0410-b5e6-96231b3b80d8
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more reliably across platforms. Patch by Tom Roeder!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191343 91177308-0d34-0410-b5e6-96231b3b80d8
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