As of March 2020, IBM became a platinum sponsor of the LLVM foundation, as shown here. The LLVM foundation is a non-profit whose mission is to support education and the advancement of the field of compilers and tools through educational events, grants and scholarships, and increasing diversity with the field of compilers, tools, and the LLVM project. With this new sponsorship, IBM reaffirms its strong commitment to the LLVM open source project and continued participation in the community.
IBM has been a strong supporter of the LLVM open source project, contributing code for both IBM Power and IBM Z hardware in the areas of code generation and exploitation, portability and usability enhancements, and toolchain support. In 2019, IBM increased participation in the LLVM project by adding AIX support and enhancing loop optimizations. IBM recently announced intentions to fully incorporate the LLVM Core and Clang sub-projects in future C/C++ offerings on z/OS, Linux on Power, AIX and IBM i (with PASE) platforms. To learn more, go here.