This patch includes documentation about the pass Speculative Execution
Side Effect Suppression. The document describes Load Value Injection,
the mitigation, and all the experiments ran on various LFENCE
placements.
One pager on Load Value Injection:
https://software.intel.com/security-software-guidance/software-guidance/load-value-injection
Deep dive on Load Value Injection:
https://software.intel.com/security-software-guidance/insights/deep-dive-load-value-injection
Impl patch: https://reviews.llvm.org/D75939