LLVM: Introduce a new pass to do Speculative Load Hardening (SLH) to mitigate Spectre variant 1

LLVM Weekly – #237, July 16th 2018. The clang-metatool framework, Speculative Load Hardening for AArch64 and X86, LLVM JSON library and TableGen backend, and more https://t.co/flKWcCELS6

— LLVM Weekly (@llvmweekly) July 16, 2018