Pull in r280040 from upstream llvm trunk (by Hal Finkel):
[PowerPC] Add support for -mlongcall The "long call" option forces the use of the indirect calling sequence for all calls (even those that don't really need it). GCC provides this option; This is helpful, under certain circumstances, for building very-large binaries, and some other specialized use cases. Fixes PR19098.
Pull in r280041 from upstream clang trunk (by Hal Finkel):
[PowerPC] Add support for -mlongcall Add support for GCC's PowerPC -mlongcall option; the backend supports the corresponding target feature as of r280040. Fixes PR19098.