Duncan P. N. Exon Smith 3e4542b2ca Reapply "LTO: add API to set strategy for -internalize" ... Reapply r199191, reverted in r199197 because it carelessly broke Other/link-opts.ll. The problem was that calling createInternalizePass("main") would select createInternalizePass(bool("main")) instead of createInternalizePass(ArrayRef<const char *>("main")). This commit fixes the bug. The original commit message follows. Add API to LTOCodeGenerator to specify a strategy for the -internalize pass. This is a new attempt at Bill's change in r185882, which he reverted in r188029 due to problems with the gold linker. This puts the onus on the linker to decide whether (and what) to internalize. In particular, running internalize before outputting an object file may change a 'weak' symbol into an internal one, even though that symbol could be needed by an external object file --- e.g., with arclite. This patch enables three strategies: - LTO_INTERNALIZE_FULL: the default (and the old behaviour). - LTO_INTERNALIZE_NONE: skip -internalize. - LTO_INTERNALIZE_HIDDEN: only -internalize symbols with hidden visibility. LTO_INTERNALIZE_FULL should be used when linking an executable. Outputting an object file (e.g., via ld -r) is more complicated, and depends on whether hidden symbols should be internalized. E.g., for ld -r, LTO_INTERNALIZE_NONE can be used when -keep_private_externs, and LTO_INTERNALIZE_HIDDEN can be used otherwise. However, LTO_INTERNALIZE_FULL is inappropriate, since the output object file will eventually need to link with others. lto_codegen_set_internalize_strategy() sets the strategy for subsequent calls to lto_codegen_write_merged_modules() and lto_codegen_compile*(). <rdar://problem/14334895> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199244 91177308-0d34-0410-b5e6-96231b3b80d8		2014-01-14 18:52:17 +00:00
..
bugpoint	[cleanup] Move the Dominators.h and Verifier.h headers into the IR	2014-01-13 09:26:24 +00:00
bugpoint-passes	Set LLVM_EXPORTED_SYMBOL_FILE in CMakeLists whose corresponding Makefiles do so.	2013-12-29 23:06:49 +00:00
gold	Re-sort #include lines again, prior to moving headers around.	2014-01-13 08:04:33 +00:00
llc	Re-sort #include lines again, prior to moving headers around.	2014-01-13 08:04:33 +00:00
lli	Re-sort #include lines again, prior to moving headers around.	2014-01-13 08:04:33 +00:00
llvm-ar	Handle UIDs and GIDs that don't fit in 6 decimal places.	2014-01-14 17:02:09 +00:00
llvm-as	[cleanup] Move the Dominators.h and Verifier.h headers into the IR	2014-01-13 09:26:24 +00:00
llvm-bcanalyzer	[cleanup] Move the Dominators.h and Verifier.h headers into the IR	2014-01-13 09:26:24 +00:00
llvm-c-test	Use -std=gnu99 in tools/llvm-c-test/CMakeLists.txt	2014-01-08 11:48:19 +00:00
llvm-config	llvm-config: Fix typo in help message introduced with r197664.	2013-12-25 02:24:32 +00:00
llvm-cov	llvm-cov: Added -f option for function summaries.	2013-12-19 00:29:25 +00:00
llvm-diff	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
llvm-dis	Move the LLVM IR asm writer header files into the IR directory, as they	2014-01-07 12:34:26 +00:00
llvm-dwarfdump	llvm-dwarfdump: type unit dwo support	2014-01-09 05:08:24 +00:00
llvm-extract	[PM] Wire up support for writing bitcode with new PM.	2014-01-13 07:38:24 +00:00
llvm-jitlistener	Manually update the dependencies in the Makefiles. It turns out that all	2013-03-26 03:45:47 +00:00
llvm-link	[cleanup] Move the Dominators.h and Verifier.h headers into the IR	2014-01-13 09:26:24 +00:00
llvm-lto	Re-sort #include lines again, prior to moving headers around.	2014-01-13 08:04:33 +00:00
llvm-mc	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
llvm-mcmarkup	MC: Simple example parser for MC assembly markup.	2012-10-31 23:24:13 +00:00
llvm-nm	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
llvm-objdump	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
llvm-readobj	[cleanup] Add a missing include exposed by resorting other includes.	2014-01-13 08:09:47 +00:00
llvm-rtdyld	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
llvm-shlib	Strip dead code when linking by default with BFD ld (linux, ...) and ld64 (os x).	2013-12-27 22:38:59 +00:00
llvm-size	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
llvm-stress	[cleanup] Move the Dominators.h and Verifier.h headers into the IR	2014-01-13 09:26:24 +00:00
llvm-symbolizer	Re-sort #include lines again, prior to moving headers around.	2014-01-13 08:04:33 +00:00
lto	Reapply "LTO: add API to set strategy for -internalize"	2014-01-14 18:52:17 +00:00
macho-dump	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
msbuild	VS integration: use the correct registry key after r195379	2013-11-22 18:25:43 +00:00
obj2yaml	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
opt	[PM] Split DominatorTree into a concrete analysis result object which	2014-01-13 13:07:17 +00:00
yaml2obj	[CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt.	2013-12-10 11:13:32 +00:00
CMakeLists.txt	llvm/tools/llvm-c-test should be built also on msvc.	2013-10-23 17:56:59 +00:00
LLVMBuild.txt	Remove the very substantial, largely unmaintained legacy PGO	2013-10-02 15:42:23 +00:00
Makefile	Add llvm-c-test tool for testing llvm-c	2013-10-23 08:10:20 +00:00