MECHANISM FOR INCREASING THE PERFORMANCE OF MULTIPLE LANGUAGE PROGRAMS BY INSERTING CALLED LANGUAGE IR INTO THE CALLING LANGUAGE

A method and system of cross-language inlining that includes receiving source code of a multiple language program, the source code including a main language and a first access of a first foreign object in a first additional language; translating the main language to obtain a main language intermediate representation (IR); translating the first additional language to obtain a first IR snippet; composing, before performing a compilation, the main language IR and the first IR snippet to obtain a cross-language IR; and performing the compilation of the cross-language IR to obtain machine code corresponding to the multiple language program.