Although static analysis presumes the loop may benefit from FMA instructions available with the AVX2 or higher ISA, no FMA instructions executed for this loop. To fix: Instead of using the xHost compiler option, which limits optimization opportunities by the host ISA, use the following compiler options:

• xCORE-AVX2 to compile for machines with and without AVX2 support
• axCORE-AVX2 to compile for machines with AVX2 support only
• xCOMMON-AVX512 to compile for machines with AVX-512 support only
• axCOMMON-AVX512 to compile for machines with and without AVX-512 support

Note: the compiler options may vary depending on the CPU microarchitecture.