https://lists.llvm.org/pipermail/llvm-announce/2019-March/000082.html- speculative load hardening
- concurrent compilation in the ORC JIT API,
- no longerexperimental WebAssembly target
- a Clang option to initialize automatic variables
- improved pre-compiled header support in clang-cl
- the /Zc:dllexportInlines- flag
- RISC-V support in lld.