Shuxin Yang 4b4ff9ec1f Misc enhancements to LTO: ... 1. Add some helper classes for partitions. They are designed in a way such that the top-level LTO driver will not see much difference with or without partitioning. 2. Introduce work-dir. Now all intermediate files generated during LTO phases will be saved under work-dir. User can specify the workdir via -lto-workdir=/path/to/dir. By default the work-dir will be erased before linker exit. To keep the workdir, do -lto-keep, or -lto-keep=1. TODO: Erase the workdir, if the linker exit prematurely. We are currently not able to remove directory on signal. The support routines simply ignore directory. 3. Add one new API lto_codegen_get_files_need_remove(). Linker and LTO plugin will communicate via this API about which files (including directories) need to removed before linker exit. llvm-svn: 188188		2013-08-12 18:29:43 +00:00
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llvm	Remove unused SpecialCaseList constructors	2013-08-12 11:50:44 +00:00
llvm-c	Misc enhancements to LTO:	2013-08-12 18:29:43 +00:00