6d578669f3
"LinkageAttributes" decoration allow a SPIR-V module to import external functions and global variables, or export functions or global variables for other SPIR-V modules to link against and use. Import/export capability is extremely important when using outside libraries (e.g., intrinsic libraries). Added decorations: - LinkageAttributes Reviewed By: antiagainst Differential Revision: https://reviews.llvm.org/D148749