Recently in some of our internal testing, we noticed that the compiler
was sometimes generating an empty linker.options section which seems
unnecessary. This proposed change causes the compiler to simply omit
emitting the linker.options section if it is empty.
a header of that same module.
This fixes a regression caused by r280409.
rdar://problem/29930553
This is an updated version for r291628 (which was reverted in r291688).
llvm-svn: 291689
filter out the implicilty imported modules at CodeGen instead of removing the
implicit ImportDecl when an implementation TU of a module imports a header of
that same module.
llvm-svn: 291688
