#pragma unrollandfuse

In IBM® XL C/C++ for AIX® 16.1.0 or earlier releases, #pragma unrollandfuse instructs the compiler to attempt an unroll and fuse operation on nested for loops.

IBM Open XL C/C++ for AIX 17.1.4 still accepts #pragma unrollandfuse but maps it to the #pragma unroll_and_jam pragma. If you used #pragma unrollandfuse in your program, you are recommended to replace it with #pragma unroll_and_jam when you migrate the program to IBM Open XL C/C++ for AIX 17.1.4.

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