 The Intel C++ compiler in the Parallel Studio XE products also supports tools, techniques and language extensions for adding and maintaining application parallelism on IA-32 and Intel 64 processors and enables compiling for Intel Xeon Phi processors and coprocessors.Profile-guided optimization refers to a mode of optimization where the compiler is able to access data from a sample run of the program across a representative input set.The data would indicate which areas of the program are executed more frequently, and which areas are executed less frequently.