Rafael Espindola 3fd7e37b34 Rewrite the gold plugin to fix pr19901. ... There is a fundamental difference between how the gold API and lib/LTO view the LTO process. The gold API talks about a particular symbol in a particular file. The lib/LTO API talks about a symbol in the merged module. The merged module is then defined in terms of the IR semantics. In particular, a linkonce_odr GV is only copied if it is used, since it is valid to drop unused linkonce_odr GVs. In the testcase in pr19901 both properties collide. What happens is that gold asks us to keep a particular linkonce_odr symbol, but the IR linker doesn't copy it to the merged module and we never have a chance to ask lib/LTO to keep it. This patch fixes it by having a more direct implementation of the gold API. If it asks us to keep a symbol, we change the linkage so it is not linkonce. If it says we can drop a symbol, we do so. All of this before we even send the module to lib/Linker. Since now we don't have to produce LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN, during symbol resolution we can use a temporary LLVMContext and do lazy module loading. This allows us to keep the minimum possible amount of allocated memory around. This should also allow as much parallelism as we want, since there is no shared context. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216215 91177308-0d34-0410-b5e6-96231b3b80d8		2014-08-21 20:28:55 +00:00
..
bugpoint	Handle inlining in populateLTOPassManager like in populateModulePassManager.	2014-08-21 13:35:30 +00:00
bugpoint-passes
gold	Rewrite the gold plugin to fix pr19901.	2014-08-21 20:28:55 +00:00
llc	Remove the TargetMachine forwards for TargetSubtargetInfo based	2014-08-04 21:25:23 +00:00
lli	Quick fix for an use after free.	2014-08-20 15:19:37 +00:00
llvm-ar	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
llvm-as	Modernize the .ll parsing interface.	2014-08-19 16:58:54 +00:00
llvm-bcanalyzer	Remove some calls to std::move.	2014-08-01 14:31:55 +00:00
llvm-c-test
llvm-config
llvm-cov
llvm-diff	Canonicalize header guards into a common format.	2014-08-13 16:26:38 +00:00
llvm-dis
llvm-dwarfdump	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
llvm-extract
llvm-jitlistener	IntelJITEventListener updates to fix breaks by recent changes to EngineBuilder and DIContext.	2014-08-21 07:01:55 +00:00
llvm-link
llvm-lto
llvm-mc	Canonicalize header guards into a common format.	2014-08-13 16:26:38 +00:00
llvm-mcmarkup
llvm-nm	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
llvm-objdump	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
llvm-profdata
llvm-readobj	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
llvm-rtdyld	Temporarily Revert "Nuke the old JIT." as it's not quite ready to	2014-08-07 22:02:54 +00:00
llvm-shlib	Revert of 214418:	2014-08-01 06:16:03 +00:00
llvm-size	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
llvm-stress
llvm-symbolizer	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
llvm-vtabledump	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
lto	Remove lto_codegen_set_attr.	2014-08-01 14:57:05 +00:00
macho-dump	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
msbuild	msbuild integration: remove duplicated lines and BOM from 2014 integration (PR20341)	2014-07-31 20:33:22 +00:00
obj2yaml	Don't own the buffer in object::Binary.	2014-08-19 18:44:46 +00:00
opt	Move some logic to populateLTOPassManager.	2014-08-21 20:03:44 +00:00
verify-uselistorder	IR: Implement uselistorder assembly directives	2014-08-19 21:30:15 +00:00
yaml2obj	Canonicalize header guards into a common format.	2014-08-13 16:26:38 +00:00
CMakeLists.txt	Rename llvm-uselistorder => verify-uselistorder	2014-07-30 17:11:27 +00:00
LLVMBuild.txt	Rename llvm-uselistorder => verify-uselistorder	2014-07-30 17:11:27 +00:00
Makefile	Rename llvm-uselistorder => verify-uselistorder	2014-07-30 17:11:27 +00:00