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3 Commits

Author SHA1 Message Date
Yuta Saito
d6cddaabb5 [LTO] Support LLVM LTO for driver 
This commit adds LTO support for handling linker options and LLVM BC
emission. Even for ELF, swift-autolink-extract is unnecessary because
linker options are embeded in LLVM BC content when LTO.
 2020-07-31 10:17:59 +09:00
Saleem Abdulrasool
71309a8fa9 Revert "[LTO] Support LLVM level link time optimization on Darwin, Linux and Windows" 2020-06-07 11:25:48 -07:00
Yuta Saito
915c4a6997 [LTO] Support LLVM level link time optimization 
This commit adds -lto flag for driver to enable LTO at LLVM level.
When -lto=llvm given, compiler emits LLVM bitcode file instead of object
file and perform thin LTO using libLTO.dylib plugin.
When -lto=llvm-full given, perform full LTO instead of thin LTO.
 2020-05-31 08:12:52 +09:00